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■PROGR AM MAB L E ELEC TR I C AL CH A RAC-
TERISTICS
■LOW SUPPLY CURRENT (250µA/amplifier)
■GAIN-BANDWITH PRODUCT : 1MHz
■LARGE DC VOLT AGE GAI N : 120dB
■LOW NOISE VOLTAGE : 28nV/√Hz
■WIDE POWER SUPPLY RANGE / ±1.5V to
±22V
■CLASSE AB OUTPUT STAGE. NO
CRO SS-OVER DISTORTI ON
■OVERL O AD PROT EC TION FOR INPU TS
AND OUTPUTS
DESCRIPTION
The LM346 consists of four independent, high
gain, internally compensated, low power program-
mable ampl ifiers. T wo external res istors (R set) al-
low the user to program the gain-bandwith prod-
uct, slew rate, supply current, input bias current,
input offset current and input noise. For example
the user can trade-off supply current for b andwith
or optimize noise figure for a given source resis-
tance. In a similar way other amplifier c haracteris-
tics can be tailored to the application.
Except for the two programming pins at the end of
the package the LM346 pin out is the same as the
LM324 and LM3 48.
PROGRAMMING EQUATIONS :
Total supply current = 1mA (Iset = 10µA)
Gain bandwith product = 1MHz (Iset = 10µA)
Slew rate = 0.5 V/ µs (Iset = 10 µΑ)
Input bias current ≈30nA (Iset = 10µΑ)
Iset = current into pin 8 and pin 9 (see sche matic
diagram)
ORDER CODE
N = Dual in Line Package (DIP))
PIN CONNECTION S (top view)
Part
Number Temperature
Range Package
N
LM146 -55°C, +125°C •
LM246 -40°C, +105°C •
LM346 0°C, +70°C •
Example : LM246N
Iset Vcc+Vcc-–0.6V–
Rset
-----------------------------------------------------=
N
DIP16
(Plastic Package)
CC
V
+
1
2
3
4
5
6
7
9
10
11
12
13
14
Non-inverting Input 2
-
+
-
+
Output 1
Non-inverting input 1
Inverting Input 1
-
CC
V
Inverting Input 2
Output 2
8
15
16 Output 4
Inverting Input 4
Non-inverting input 4
Non-inverting input 3
Inverting input 3
Output 3
Set Set
LM146
LM246
LM346
PROGRAMMABLE
QUAD BIPOLAR OP ERATIONAL AMPLIFIER
April 2003
LM146-LM246-LM346
2/4
SCHEMATIC DIAGRAM (1/4 LM146 )
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Supply voltag e ±22 V
Vil Input Voltage 1)
1. For supply voltage less than ±15V, the absolute maximum input voltage is equal to the supply voltage.
±15 V
Vid Differential Input Voltage ±30 V
Output Short -circu it Duration 2)
2. Any of the amplifier outputs can be shorted to ground indefinitly; however more than one should not be simultaneously shorted as the maximum
junction will be exceeded.
Infinite
Ptot Power Dissipation 500 mW
Toper
Opearting Free-air Temperature RangeLM146
LM246
LM346
-55 to +125
40 to +105
0 to +70-
°C
Tstg Storage Temperature Range -65 to +150 °C
LM146-LM246-LM346
3/4
ELECTRICAL CHARACTERISTICS
VCC+ = ±15V, Iset = 10µA, Tamb = +25°C (unless otherwise specified)
Symbol Parameter LM146 LM246 - LM346 Unit
Min. Typ. Max. Min. Typ. Max.
Vio
Input Offset Voltage (Rs ≤ 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
0.5 3
50.5 5
6
mV
Iio
Input Offset Current
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 220
25 2 100
100
nA
Iib
Input Bias Current
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
30 100
100 30 250
250
nA
Avd
Large Signal Voltage Gain
(Vo = ±10V, RL = 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
100
50 1000 50
25 1000
V/mV
SVR Supply Voltage Rejection Ratio (Rs ≤ 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
80
80 110 80
80 110 dB
Icc
Supply Current, all Amp, no load
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 12
212
2
mA
Vicm
Input Common Mode Voltage Range
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax ±13.5
±13.5 ±13.5
±13.5
CMR Common Mode Rejection Ratio (Rs ≤ 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
80
70 110 80
70 110 dB
Ios
Output Short-circuit Current
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 10
420 30
35 10
420 30
35
mA
±Vopp
Output Voltage Swing (RL ≤ 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
12
12 14 12
12 14 V
SR Slew Rate (V I = ±10V, RL = 10kΩ, CL = 100pF,
unity Gain) 0.3 0.5 0.3 0.5 V/µs
RIInput Resistance 1 1 MΩ
CIInput Capacitance 2 2 pF
Vo1/Vo2 Channel Separation (RL = 10kΩ, Vo = 12Vpp)120 120 dB
GBP Gain Bandwith Product
(VI = 10 mV, RL = 10kΩ, CL = 100pF
f =100kHz) 0.8 1 0.5 1
MHz
THD Total Harmonic Distortion
(f = 1kHz, Av = 20dB, RL = 10kΩ
CL = 100pF, Vo = 2Vpp) 0.015 0.015
%
enEquivalent Input Noise Voltage
(f = 1kHz, Rs = 100Ω28 28 nV
Hz
------------
LM146-LM246-LM346
4/4
PACKAGE MECHANICAL DATA
16 PINS - PLASTIC PACKAGE
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
i 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
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consequences of use of such information nor for any infringement of patents or other rights of third parties whi ch may result from
its use. No li cense is granted by implication or otherwise under any pate nt or patent righ ts of STMicroelectronics. S pecifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
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