PCM54HP - Texas Instruments - searchdatasheet.com

PCM54

PCM55

FEATURES

●PARALLEL INPUT FORMAT

●16-BIT RESOLUTION

●15-BIT MONOTONICITY (typ)

●–92dB TOTAL HARMONIC DISTORTION

(K Grade)

●3µs SETTLING TIME (Voltage Out)

●96dB DYNAMIC RANGE

●±3V or ±1mA AUDIO OUTPUT

●OPERATES ON ±5V (PCM55) TO ±12V

(PCM54) SUPPLIES

●28-PIN DIP (PCM54)

●24-LEAD SOIC (PCM55)

16-Bit Monolithic

DIGITAL-TO-ANALOG CONVERTERS

DESIGNED FOR AUDIO

DESCRIPTION

The PCM54 and PCM55 family of converters are

parallel input, fully monotonic, 16-bit digital-to-ana-

log converters that are designed and specified for

digital audio applications. These devices employ ul-

tra-stable nichrome (NiCr) thin-film resistors to pro-

vide monotonicity, low distortion, and low differential

linearity error (especially around bipolar zero) over

long periods of time and over the full operating

temperature.

These converters are completely self-contained with a

stable, low noise, internal, zener voltage reference;

high speed current switches; a resistor ladder

network; and a fast settling, low noise output opera-

tional amplifier all on a single monolithic chip. The

converters are operated using two power supplies that

can range from ±5V (PCM55) to ±12V (PCM54).

Power dissipation with ±5V supplies is typically less

than 200mW. Also included is a provision for exter-

nal adjustment of the MSB error (differential linearity

error at bipolar zero, PCM54 only) to further improve

Total Harmonic Distortion (THD) specifications if

desired.

A current output (IOUT) wiring option is provided. This

output typically settles to within ±0.006% of FSR

final value in 350ns (in response to a full-scale change

in the digital input code).

The PCM54 is packaged in 28-pin plastic DIP pack-

age. The PCM55 is available in a 24-lead plastic mini-

flatpak.

16-Bit Ladder

Resistor Network

and

Current Switches

Reference

Voltage

Parallel

Digital

Input

Output

Operational

Amplifier

Audio Output

(Voltage)

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

SBAS146

Not Recommended For New Designs

PCM54/55 2

SPECIFICATIONS

ELECTRICAL

At +25°C and ±VCC = 12V, unless otherwise noted.

✽ Specifications same as for PCM54HP.

NOTES: (1) Externally adjustable. If external adjustment is not used, connect a 0.01µF capacitor to Common to reduce noise pickup. (2) FSR means Full-Scale Range

and is 6V for ±3V output. (3) The measurement of total harmonic distortion is highly dependent on the characteristics of the measurement circuit. Burr-Brown may

calculate THD from the measured linearity errors using Equation 2 in the section on “Total Harmonic Distortion,” but specifies that the maximum THD measured with

the circuit shown in Figure 2 will be less than the limits indicated. (4) Measured with an active clamp to provide a low impedance for approximately 200ns. (5) Deglitcher

or sample/hold delay used in THD measurement test circuit. See Figures 2 and 3. (6) Output amplifier disconnected.

PCM54HP, PCM55HP PCM54JP, PCM55JP PCM54KP

PARAMETER MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS

DIGITAL INPUTS

Resolution 16 ✽✽Bits

Dynamic Range 96 ✽✽dB

Logic Levels (TTL/CMOS Compatible):

VIH +2.4 +5.25 ✽✽✽✽V

VIL 0 +0.8 ✽✽✽✽V

IIH, VIN = +2.7V +40 ✽✽µA

IIL, VIN = +0.4V –0.5 ✽✽mA

TRANSFER CHARACTERISTICS

ACCURACY

Gain Error ±2✽✽%

Bipolar Zero Error ±30 ✽✽mV

Differential Linearity Error at Biploar Zero(1) ±0.001 ✽✽% FSR(2)

Noise (rms) (20Hz to 20kHz) at Bipolar Zero 12 ✽✽µV

TOTAL HARMONIC DISTORTION(3)

(16-Bit Resolution)

VO = ±FS at f = 991Hz –94 –82 ✽–88 ✽✽–92 dB

VO = –20dB at f = 991Hz –74 –68 ✽✽✽–80 –74 dB

VO = –60dB at f = 991Hz –34 –28 ✽✽✽–40 –34 dB

MONOTONICITY 15 ✽✽Bits

SETTLING TIME (to ±0.006% of FSR)

Voltage Output: 6V Step 3 ✽✽µs

1LSB Step 1 ✽✽µs

Current Output (1mA Step):10Ω to 100Ω Load 350 ✽✽ns

1kΩ Load(4) 350 ✽✽ns

Deglitcher Delay (THD Test)(5) 2.5 4 ✽✽ ✽✽ µs

Slew Rate 10 ✽✽V/µs

WARM-UP TIME 1✽✽Min

ANALOG OUTPUT

Voltage Output: Bipolar Range ±3✽✽V

Output Current ±2✽✽mA

Output Impedance 0.1 ✽✽Ω

Short-Circuit Duration Indefinite to Common ✽✽

Current Output:(6)

Bipolar Range (±30%) ±1✽✽mA

Bipolar Output Impedance (±30%) 1.2 ✽✽kΩ

POWER SUPPLY REQUIREMENTS

Voltage: +VCC (PCM54) +4.75 +12 +15.75 ✽✽✽✽✽✽ V

–VCC (PCM54) –4.75 –12 –15.75 ✽✽✽✽✽✽ V

+VCC (PCM55) +4.75 +5 +7.5 ✽✽✽✽✽✽ V

–VCC (PCM55) –4.75 –5 –7.5 ✽✽✽✽✽✽ V

Supply Drain: +VCC +13 +20 ✽✽ ✽✽mA

–VCC –16 –25 ✽✽ ✽✽mA

TEMPERATURE RANGE

Operating 0 +70 ✽✽✽✽°C

Storage –55 +100 ✽✽✽✽°C

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN

assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject

to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not

authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

Not Recommended For New Designs

PCM54/55

CONNECTION DIAGRAMS

PIN PCM54-DIP PIN PCM54-DIP

1 Trim 15 Bit 13

2 Bit 1 (MSB) 16 Bit 14

3 Bit 2 17 Bit 15

4 NC 18 Bit 16 (LSB)

5 Bit 3 19 VOUT

6 Bit 4 20 RFB

7 Bit 5 21 SJ

8 Bit 6 22 Common

9 Bit 7 23 IOUT

10 Bit 8 24 NC

11 Bit 9 25 IBPO

12 Bit 10 26 +VCC

13 Bit 11 27 MSB Adjust

14 Bit 12 28 –VCC

PIN ASSIGNMENTS

PIN PCM55-SOIC PIN PCM55-SOIC

1 Bit 1 (MSB) 13 Bit 13

2 Bit 2 14 Bit 14

3 Bit 3 15 Bit 15

4 Bit 4 16 Bit 16

5 Bit 5 17 VOUT

6 Bit 6 18 Feedback Resistor

7 Bit 7 19 Summing Junction

8 Bit 8 20 Common

9 Bit 9 21 Current Output

10 Bit 10 22 Bipolar Offset

11 Bit 11 23 +VCC

12 Bit 12 24 –VCC

PIN ASSIGNMENTS

DC Supply Voltage ...................................................................... ±18VDC

Input Logic Voltage ............................................................... –1V to +5.5V

Power Dissipation ..................................PCM54 800mW, PCM55 400mW

Storage Temperature...................................................... –55°C to +100°C

Lead Temperature, (soldering, 10s) .............................................. +300°C

ABSOLUTE MAXIMUM RATINGS

ORDERING INFORMATION

PACKAGE INFORMATION

PACKAGE DRAWING

PRODUCT PACKAGE NUMBER(1)

PCM54HP 28-Pin DIP 215

PCM54JP 28-Pin DIP 215

PCM54KP 28-Pin DIP 215

PCM55HP 24-Lead SOIC 178

PCM55JP 24-Lead SOIC 178

NOTE: (1) For detailed drawing and dimension table, please see end of data

sheet, or Appendix C of Burr-Brown IC Data Book.

PRODUCT THD at FS PACKAGE

PCM54HP 0.008 28-Pin DIP

PCM54JP 0.004 28-Pin DIP

PCM54KP 0.0025 28-Pin DIP

PCM55HP 0.008 24-Lead SOIC

PCM55JP 0.004 24-Lead SOIC

0.1µF

PCM54

16-Bit

Ladder

Resistor

Network

and

Switches

Zener

Voltage

Reference

Data

Inputs

1µF

(2)

(3)

Common

Audio

OUT

100kΩ

560kΩ330kΩ

1MΩ

(1)

–V

(Optional)

Data Inputs

1µF

PCM55

16-Bit

Ladder

Resistor

Network

and

Switches

Zener

Voltage

Reference

Data

Inputs

1µF

(2)

Common

Audio

OUT

(1)

–V

Data Inputs

(2)

NOTES: (1) MSB error (BPZ differential linearity error) can be adjusted to zero

using this external circuit. (2) Connect to bipolar operation (+VCC ≥ 8.5V for

unipolar operation). (3) Connect for VOUT operation. When VOUT amp is not being

used (IOUT mode), terminate with an external 3kΩ feedback resistor between pin

19 and pin 21, and a 1kΩ resistor between pin 21 and pin 22 to reduce possible

noise effects.

NOTES: (1) Connect for bipolar operation. (+VCC ≥ 8.5V for unipolar operation.)

(2) Connect for VOUT operation. When VOUT amp is not being used (IOUT mode),

terminate with an external 3kΩ feedback resistor between pin 17 and pin 19, and

a 1kΩ resistor between pin 19 and pin 20 to reduce possible noise effects.

Not Recommended For New Designs

PCM54/55 4

DISCUSSION OF

SPECIFICATIONS

The PCM54 and PCM55 are specified to provide critical

performance criteria for a wide variety of applications. The

most critical specifications for a D/A converter in audio

applications are total harmonic distortion, differential linear-

ity error, bipolar zero error, parameter shifts with time and

temperature, and settling time effects on accuracy.

The PCM54 and PCM55 are factory-trimmed and tested for

all critical key specifications.

The accuracy of a D/A converter is described by the transfer

function shown in Figure 1. Digital input to analog output

relationship is shown in Table I. The errors in the D/A

converter are combinations of analog errors due to the linear

circuitry, matching and tracking properties of the ladder and

scaling networks, power supply rejection, and reference

errors. In summary, these errors consist of initial errors

including gain, offset, linearity, differential linearity, and

power supply sensitivity. Gain drift over temperature rotates

the line (Figure 1) about the bipolar zero point and offset

drift shifts the line left or right over the operating tempera-

ture range. Most of the offset and gain drift with temperature

or time is due to the drift of the internal reference zener

diode. The converter is designed so that these drifts are in

opposite directions. This way, the bipolar zero voltage is

virtually unaffected by variations in the reference voltage.

DIGITAL INPUT CODES

The PCM54 and PCM55 accept complementary digital

input codes in any of three binary formats (CSB, unipolar; or

COB, bipolar; or CTC, Complementary Two’s Comple-

ment, bipolar). See Table II.

Gain

Drift

Offset

Drift

Bipolar

Zero

–FSR/2 (+FSR/2) –1LSB

Digital Input

Analog Output

0000…0000

0000…0001

0111…1101

0111…1110

0111…1111

1000…0000

1000…0001

1111…1110

1111…1111

All Bits

* See Table I for digital code definitions.

FIGURE 1. Input vs Output for an Ideal Bipolar D/A

Converter.

ANALOG OUTPUT

Digital Complementary Complementary Complementary

Input Straight Binary Offset Binary Two’s Complement

Codes (CSB) (COB) (CTS)(1)

0000H+Full Scale +Full Scale –1LSB

7FFFH+1/2 Full Scale Bipolar Zero –Full Scale

8000H+1/2 Full Scale –1LSB +Full Scale

–1LSB

FFFFHZero –Full Scale Bipolar Zero

NOTE: (1) Invert the MSB of the COB code with an external inverter to obtain

CTC code.

TABLE II. Digital Input Codes.

BIPOLAR ZERO ERROR

Initial Bipolar Zero (BPZ) error (Bit 1 “ON” and all other

bits “OFF”) is the deviation from 0V out and is factory-

trimmed to typically ±10mV at +25°C.

DIFFERENTIAL LINEARITY ERROR

Differential Linearity Error (DLE) is the deviation from an

ideal 1LSB change from one adjacent output state to the

next. DLE is important in audio applications because exces-

sive DLE at bipolar zero (at the “major carry”) can result in

audible crossover distortion for low level output signals.

Initial DLE on the PCM54 and PCM55 is factory-trimmed

to typically ±0.001% of FSR. This error is adjustable to zero

using the circuit shown in the connection diagram (PCM54

only).

VOLTAGE OUTPUT MODE

Analog Output

Unipolar(1) Bipolar

Digital Input Code 16-Bit 15-Bit 14-Bit 16-Bit 15-Bit 14-Bit

One LSB (µV) 91.6 183 366 91.6 183 366

0000H(V) +5.99991 +5.99982 +5.99963 +2.99991 +2.99982 +2.99963

FFFFH(V) 0 0 0 –3.0000 –3.0000 –3.0000

CURRENT OUTPUT MODE

Analog Output

Unipolar Bipolar

Digital Input Code 16-Bit 15-Bit 14-Bit 16-Bit 15-Bit 14-Bit

One LSB (µA) 0.031 0.061 0.122 0.031 0.061 0.122

0000H(mA) –1.99997 –1.99994 –1.99988 –0.99997 –0.99994 –0.99988

FFFFH(mA) 0 0 0 +1.00000 +1.00000 +1.00000

NOTE: (1) +VCC must be at least +8.5VDC to allow output to swing to +6.0VDC.

TABLE I. Digital Input to Analog Output Relationship.

Not Recommended For New Designs

PCM54/55

POWER SUPPLY SENSITIVITY

Changes in the DC power supplies will affect accuracy.

The PCM54 and PCM55 power supply sensitivity is shown

by Figure 2. Normally, regulated power supplies with 1% or

less ripple are recommended for use with the DAC. See also

Power Supply Connections paragraph in the Installation and

Operating Instructions section.

SETTLING TIME

Settling time is the total time (including slew time) required

for the output to settle within an error band around its final

value after a change in input (see Figure 3).

Settling times are specified to ±0.006% of FSR; one for a

large output voltage change of 3V and one for a 1LSB

change. The 1LSB change is measured at the major carry

(0111…11 to 10000.00), the point at which the worst-case

settling time occurs.

STABILITY WITH TIME AND TEMPERATURE

The parameters of a D/A converter designed for audio

applications should be stable over a relatively wide tempera-

ture range and over long periods of time to avoid undesirable

periodic readjustment. The most important parameters are

bipolar zero, differential linearity error, and total harmonic

distortion. Most of the offset and gain drift with temperature

or time is due to the drift of the internal reference zener

diode. The PCM54 and PCM55 are designed so that these

drifts are in opposite directions so that the bipolar zero

voltage is virtually unaffected by variations in the reference

voltage. Both DLE and THD are dependent upon the match-

ing and tracking of resistor ratios and upon VBE and hFE of

the current-source transistors. The PCM54 and PCM55 were

designed so that any absolute shift in these components has

virtually no effect on DLE or THD. The resistors are made

of identical links of ultra-stable nichrome thin-film. The

current density in these resistors is very low to further

enhance their stability.

DYNAMIC RANGE

The dynamic range is a measure of the ratio of the smallest

signals the converter can produce to the full-scale range and

is usually expressed in decibels (dB). The theoretical dy-

namic range of a converter is approximately 6 x n, or about

96dB for a 16-bit converter. The actual, or useful, dynamic

range is limited by noise and linearity errors and is therefore

somewhat less than the theoretical limit. However, this does

point out that a resolution of at least 16 bits is required to

obtain a 90dB minimum dynamic range, regardless of the

accuracy of the converter. Another specification that is

useful for audio applications is total harmonic distortion.

TOTAL HARMONIC DISTORTION

THD is useful in audio applications and is a measure of the

magnitude and distribution of the linearity error, differential

linearity error, and noise as well as quantization error. To be

useful, THD should be specified for both high level and low

level input signals. This error is unadjustable and is the most

meaningful indicator of D/A converter accuracy for audio

applications.

The THD is defined as the ratio of the square root of the sum

of the squares of the values of the harmonics to the value of

the fundamental input frequency and is expressed in percent

or dB. The rms value of the PCM54/55 error referred to the

input can be shown to be:

(1)

where n is the number of samples in one cycle of any given

sine wave, EL(i) is the linearity error of the PCM54 or

PCM55 at each sampling point, and EQ(i) is the quantization

10.0

3.0

1.0

0.30

0.10

0.03

0.01

0.003

0.001

51015

±V

Supplies (V)

THD (%)

0dB

–60dB

–20dB

FIGURE 2. Effects of ±VCC on Total Harmonic Distortion

(PCM54JP; VCCs with approximately 2% ripple).

rms i

nLQ

nii=+

ΕΕ[() ()]

FIGURE 3. Full-Scale Range Settling Time vs Accuracy.

1.0

0.3

0.1

0.03

0.01

0.003

0.0010.01 0.1 1.0 10.0

Settling Time (µs)

Accuracy Percent Full-Scale Range (%)

= 200Ω

Current

Output

Mode

Voltage

Output

Mode

Not Recommended For New Designs

PCM54/55 6

error at each sampling point. The THD can then be ex-

pressed as:

(2)

where Erms is the rms signal voltage level.

This expression indicates that, in general, there is a correla-

tion between the THD and the square root of the sum of the

squares of the linearity errors at each digital word of interest.

However, this expression does not mean that the worst-case

linearity error of the D/A is directly correlated to the THD.

For PCM54/55 the test period was chosen to be 22.7µs

(44.1kHz) which is compatible with the EIAJ STC-007

specification for PCM audio. The test frequency is 420Hz

and the amplitude of the input signal is 0dB, –20dB, and

–60dB down from full scale.

Figure 4 shows the typical THD as a function of output

voltage.

Figure 5 shows typical THD as a function of frequency.

THD nii

rms

nLQ

rms

== +

ΕΕ

100

[() ()]

•%

INSTALLATION AND OPERATING

INSTRUCTIONS

POWER SUPPLY CONNECTIONS

For optimum performance and noise rejection, power supply

decoupling capacitors should be added as shown in the

connections diagram. These capacitors (1µF tantalum or

electrolytic recommended) should be located close to the

converter.

MSB ERROR ADJUSTMENT PROCEDURE

(OPTIONAL)

The MSB error of the PCM54 and PCM55 can be adjusted

to make the differential linearity error (DLE) at BPZ essen-

tially zero. This is important when the signal output levels

are very low because zero crossing noise (DLE at BPZ)

becomes very significant when compared to the small code

changes occurring in the LSB portion of the converter.

Differential linearity error at bipolar zero is guaranteed to

meet data sheet specifications without any external adjust-

ment. However, a provision has been made for an optional

adjustment of the MSB linearity point which makes it

possible to eliminate DLE error at BPZ (PCM54 only). Two

procedures are given to allow either static or dynamic

adjustment. The dynamic procedure is preferred because of

the difficulty associated with the static method (accurately

measuring 16-bit LSB steps).

To statically adjust DLE at BPZ, refer to the circuit shown

in Figure 6 or the PCM54 connection diagram. After allow-

ing ample warm-up time (20-30 minutes) to assure stable

operation of the PCM54, select input code 8000 hexadeci-

mal (all bits off except the MSB). Measure and record it.

Change the digital input code to 7FFF hexadecimal (all bits

off except the MSB). Adjust the 100kΩ potentiometer to

make the audio output read 92µV more than the voltage

reading of the previous code (a ILSB step = 92µV).

A much simpler method is to dynamically adjust the DLE at

BPZ. Again, refer to Figure 6 or the PCM54 connection

diagram for circuitry and component values. Assuming the

device has been installed in a digital audio application

circuit, send the appropriate digital input to produce a –60dB

level sinusoidal output. While measuring the THD of the

audio circuit output, adjust the 100kΩ potentiometer until a

minimum level of distortion is observed.

0.1

0.05

0.02

0.01

0.005

0.002

0.001 100 1k 10k 20k

Frequency (Hz)

Total Harmonic Distortion (%)

–20dB

Full Scale

FIGURE 5. Total Harmonic Distortion (THD) vs

Frequency.

10.0

4.0

2.0

1.0

0.4

0.2

0.1

0.04

0.02

0.01

0.004

0.002

0.001–60 –50 –40 –30 –20 –10 0

OUT

(dB)

Total Harmonic Distortion (THD) in %

0dB = Full-Scale Range (FSR)

16 Bits

14 Bits

FIGURE 4. Total Harmonic Distortion (THD) vs VOUT.

FIGURE 6. MSB Differential Linearity at Bipolar Zero Ad-

justment Circuit (optional).

1MΩ

560kΩ100kΩ330kΩ–V

Not Recommended For New Designs

PCM54/55

Due to the fast settling time of the PCM54-V, it is possible

to minimize the delay between the left channel and right

channel outputs when using a single D/A converter for both

channels. This is important because the left and right chan-

nel data is recorded in phase and use of a slower D/A

converter would result in significant phase error at the

higher audio frequencies.

A low-pass filter is required at the S/H output to remove all

unwanted frequency components caused by the sampling

frequency as well as the discrete nature of the D/A converter

output. The filter must have a flat amplitude response over

the entire audio band (0 to 20kHz) and a very high attenu-

ation above 20kHz. Most previous digital audio circuits used

a high-order (9-13 pole) analog filter. However, the phase

response of an analog filter with these amplitude character-

istics is nonlinear and can disturb the pulse-shaped charac-

teristics of the transients contained in music.

INSTALLATION

CONSIDERATIONS

If the optional external MSB error circuitry is used (PCM54),

a potentiometer with adequate resolution and a TCR of

100ppm/°C or less is required. Also, extra care must be

taken to insure that no leakage path (either AC or DC) exists

to pin 27 (PCM54). If circuit is not used, pin 1 (PCM54)

should be terminated to common with a 0.01µF capacitor.

The PCM converter and the wiring to its connectors should

be located to provide the optimum isolation from sources of

RFI and EMI. The important consideration in the elimina-

tion of RF radiation or pickup is loop area; therefore, signal

leads and their return conductors should be kept close

together. This reduces the external magnetic field along with

any radiation. Also, if a signal lead and its return conductor

are wired close together, they represent a small flux-capture

cross section for any external field. This reduces radiation

pickup in the circuit.

APPLICATIONS

A sample/hold amplifier, or “deglitcher”, is required at the

output of the D/A converter for both the left and right

channel, as shown in Figure 7. The S/H amplifier for the left

channel is composed of A2, SW1, and associated circuitry. A2

is used as an integrator to hold the analog voltage in C1.

Since the source and drain of the FET switch operates at a

virtual ground when “C” and “B” are closed in the simple

mode, there is no increase in distortion caused by the

modulation effect of RON by the audio signal.

Figure 8 shows the deglitcher control signals for both the left

and right channels which are produced by the timing control

logic. A delay of 2.5µs (tω) is provided to eliminate the

glitch and allow the output of the PCM54-V to settle within

a small error band around its final value before connecting

it to the channel output.

PCM54/55

Left Channel Output to LPF

and Other Circuits

Left Channel

Deglitcher Control

Right Channel Output to LPF

and Other Circuits

, A

ATE

OPA101 or OPA404

Right Channel

Deglitcher Control

Data to

DAC

A LOW signal on the

deglitcher control closes switch “A”,

while a HIGH signal closes switch “B”.

FIGURE 7. A Sample/Hold Amplifier (deglitcher) is Re-

quired at the Digital-to-Analog Output for Both

Left and Right Channels.

Right Channel Data N Left Channel Data N

Right Channel Data N+1

Left Channel Data N+1

44.1kHz

Delay Between Left and Right Channel

Data for DAC

Right Channel

Deglitcher Control

Left Channel

Deglitcher Control

The deglitcher control signals are generated by the timing control logic. The fast settling time of the

PCM54/55 makes it possible to minimize the delay between left and right channels to approximately 4.5µs

which reduces phase error at the higher audio frequencies.

FIGURE 8. Timing Diagram for the Deglitcher Control Signals.

Not Recommended For New Designs

PACKAGE OPTION ADDENDUM

www.ti.com 6-Aug-2012

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status (1) Package Type Package

Drawing Pins Package Qty Eco Plan (2) Lead/

Ball Finish MSL Peak Temp (3) Samples

(Requires Login)

PCM54HP OBSOLETE PDIP NTD 28 TBD Call TI Call TI

PCM54JP OBSOLETE PDIP NTD 28 TBD Call TI Call TI

PCM55HP OBSOLETE SOP DVK 24 TBD Call TI Call TI

PCM55HP-1 OBSOLETE SOP DVK 24 TBD Call TI Call TI

PCM55HP-1G6 OBSOLETE SOP DVK 24 TBD Call TI Call TI

PCM55HP/1K OBSOLETE SOP DVK 24 TBD Call TI Call TI

PCM55HP/1KG6 NRND SOP DVK 24 TBD Call TI Call TI

PCM55HPG6 NRND SOP DVK 24 TBD Call TI Call TI

(1) The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

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