AD1937
Rev. B | Page 4 of 36
Parameter Conditions/Comments Min Typ Max Unit
Total Harmonic Distortion + Noise 0 dBFS
Two channels running −94 dB
Eight channels running −86 −76 dB
Full-Scale Output Voltage 1.76 (4.96) V rms (V p-p)
Gain Error −10 +10 %
Interchannel Gain Mismatch −0.2 +0.2 dB
Offset Error −25 −6 +25 mV
Gain Drift −30 +30 ppm/°C
Interchannel Isolation 100 dB
Interchannel Phase Deviation 0 Degrees
Volume Control Step 0.375 dB
Volume Control Range 95 dB
De-emphasis Gain Error ±0.6 dB
Output Resistance at Each Pin 100 Ω
REFERENCE
Internal Reference Voltage FILTR pin 1.50 V
External Reference Voltage FILTR pin 1.32 1.50 1.68 V
Common-Mode Reference Output CM pin 1.50 V
REGULATOR
Input Supply Voltage VSUPPLY pin 4.5 5 5.5 V
Regulated Output Voltage VSENSE pin 3.19 3.37 3.55 V
Specifications measured at −40°C < T
C
< +125°C, AVDD = 3.3 V ± 10%.
Table 3.
−40°C < T
C
< +125°C, AVDD = 3.3 V ± 10%
Parameter Conditions/Comments Min Max Units
ANALOG-TO-DIGITAL CONVERTERS
ADC Resolution All ADCs 24 Bits
Dynamic Range 20 Hz to 20 kHz, −60 dB
No Filter (RMS) 93 dB
With A-Weighted Filter (RMS) 95 dB
Total Harmonic Distortion + Noise −1 dBFS −85 dB
Full-Scale Input Voltage (Differential) 1.75 2.05 V rms
Gain Error −10 +10 %
Interchannel Gain Mismatch −0.46 +0.25 dB
Offset Error −10 +10 mV
Gain Drift 100 ppm/°C
Interchannel Isolation −105 dB
CMRR 100 mV rms, 1 kHz 42 dB
100 mV rms, 20 kHz 42 dB
Input Resistance By design kΩ
Input Capacitance By design pF
Input Common-Mode Bias Voltage 1.45 1.55 V dc
DIGITAL-TO-ANALOG CONVERTERS
DAC Resolution All DACs 24 Bits
Dynamic Range 20 Hz to 20 kHz, −60 dB
No Filter (RMS) 100 dB
With A-Weighted Filter (RMS) 104 dB
With A-Weighted Filter (Average) 109 dB
Total Harmonic Distortion + Noise 0 dBFS
Two channels −84 dB
Eight channels −76 dB
