Datasheet

AD1937
Rev. B | Page 3 of 36
SPECIFICATIONS
TEST CONDITIONS
Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase deviation specifications.
Table 1.
Parameter Value
Supply Voltages (AVDD, DVDD) 3.3 V
Temperature As specified in Table 2 and Table 3
Master Clock 12.288 MHz (48 kHz f
S
, 256 × f
S
mode)
Input Sample Rate 48 kHz
Measurement Bandwidth 20 Hz to 20 kHz
Word Width 24 bits
Load Capacitance (Digital Output) 20 pF
Load Current (Digital Output) ±1 mA or 1.5 kΩ to ½ DVDD supply
Input Voltage High 2.0 V
Input Voltage Low 0.8 V
ANALOG PERFORMANCE SPECIFICATIONS
Specifications guaranteed at a T
A
of 25°C.
Table 2.
Parameter Conditions/Comments Min Typ Max Unit
ANALOG-TO-DIGITAL CONVERTERS
ADC Resolution All ADCs 24 Bits
Dynamic Range 20 Hz to 20 kHz, −60 dB input
No Filter (RMS) 96 102 dB
With A-Weighted Filter (RMS) 98 105 dB
Total Harmonic Distortion + Noise −1 dBFS −96 −87 dB
Full-Scale Input Voltage (Differential) 1.9 V rms
Gain Error −10 +10 %
Interchannel Gain Mismatch −0.25 +0.25 dB
Offset Error −10 0 +10 mV
Gain Drift 100 ppm/°C
Interchannel Isolation −110 dB
CMRR 100 mV rms, 1 kHz 55 dB
100 mV rms, 20 kHz 55 dB
Input Resistance 14 kΩ
Input Capacitance 10 pF
Input Common-Mode Bias Voltage 1.5 V
DIGITAL-TO-ANALOG CONVERTERS
DAC Resolution All DACs 24 Bits
Dynamic Range 20 Hz to 20 kHz, −60 dB input
No Filter (RMS) 102 107 dB
With A-Weighted Filter (RMS) 105 110 dB
With A-Weighted Filter (Average) 112 dB