2−2
2.3 Electrical Characteristics Over Recommended Operating Conditions, AVDD,
HPVDD, BVDD = 3.3 V, DVDD = 1.5 V, Slave Mode, XTI/MCLK = 256fs, fs = 48 kHz
(unless otherwise stated)
2.3.1 ADC
2.3.1.1 Line Input to ADC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Input signal level (0 dB) 1 VRMS
Signal-to-noise ratio, A-weighted, 0-dB gain (see Notes 3
fs = 48 kHz (3.3 V) 85 90
Signal-to-noise ratio, A-weighted, 0-dB gain (see Notes 3
and 4) fs = 48 kHz (2.7 V) 90 dB
Dynamic range, A-weighted, −60-dB full-scale input (see
AVDD = 3.3 V 85 90
Dynamic range, A-weighted, −60-dB full-scale input (see
Note 4) AVDD = 2.7 V 90 dB
Total harmonic distortion, −1-dB input, 0-dB gain
AVDD = 3.3 V –80
Total harmonic distortion, −1-dB input, 0-dB gain AVDD = 2.7 V 80 dB
Power supply rejection ratio 1 kHz, 100 mVpp 50 dB
ADC channel separation 1 kHz input tone 90 dB
Programmable gain 1 kHz input tone, RSOURCE < 50 Ω–34.5 12 dB
Programmable gain step size Monotonic 1.5 dB
Mute attenuation 0 dB, 1 kHz input tone 80 dB
12 dB Input gain 10 20
Input resistance 0 dB input gain 30 35 kΩ
Input capacitance 10 pF
NOTES: 3. Ratio of output level with 1-kHz full-scale input, to the output level with the input short circuited, measured A-weighted over a 20-Hz
to 20-kHz bandwidth using an audio analyzer.
4. All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter
results in higher THD + N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass
filter removes out-of-band noise, which, although not audible, may affect dynamic specification values.
2.3.1.2 Microphone Input to ADC, 0-dB Gain, fs = 8 kHz (40-KΩ Source Impedance, see Section 1.2,
Functional Block Diagram)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Input signal level (0 dB) 1.0 VRMS
Signal-to-noise ratio, A-weighted, 0-dB gain (see Notes 3 and 4)
AVDD = 3.3 V 80 85
Signal-to-noise ratio, A-weighted, 0-dB gain (see Notes 3 and 4) AVDD = 2.7 V 84 dB
Dynamic range, A-weighted, −60-dB full-scale input (see Note 4)
AVDD = 3.3 V 80 85
Dynamic range, A-weighted, −60-dB full-scale input (see Note 4) AVDD = 2.7 V 84 dB
Total harmonic distortion, −1-dB input, 0-dB gain
AVDD = 3.3 V –60
Total harmonic distortion, −1-dB input, 0-dB gain AVDD = 2.7 V −60 dB
Power supply rejection ratio 1 kHz, 100 mVpp 50 dB
Programmable gain boost 1 kHz input tone, RSOURCE < 50 Ω20 dB
Microphone-path gain MICBOOST = 0, RSOURCE < 50 Ω14 dB
Mute attenuation 0 dB, 1 kHz input tone 60 80 dB
Input resistance 8 14 kΩ
Input capacitance 10 pF
NOTES: 3. Ratio o f output level with 1-kHz full-scale input, to the output level with the input short circuited, measured A-weighted over a 20-Hz
to 20-kHz bandwidth using an audio analyzer.
4. All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter
results in higher THD + N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass
filter removes out-of-band noise, which, although not audible, may affect dynamic specification values.