AD1928
Rev. B | Page 3 of 32
SPECIFICATIONS
TEST CONDITIONS
Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase deviation specifications.
Supply voltages (AVDD, DVDD) 3.3 V
Temperature range
1
As specified in Table 1 and Table 2
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
High level input voltage 2.0 V
Low level input voltage 0.8 V
1
Functionally guaranteed at −40°C to +125°C case temperature.
ANALOG PERFORMANCE SPECIFICATIONS
Specifications guaranteed at an ambient temperature of 25°C.
Table 1.
Parameter Conditions 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) 98 102 dB
With A-Weighted Filter (RMS) 100 105 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
Dynamic Range 20 Hz to 20 kHz, −60 dB input
No Filter (RMS) 98 104 dB
With A-Weighted Filter (RMS) 100 106 dB
With A-Weighted Filter (Average) 108 dB
Total Harmonic Distortion + Noise 0 dBFS
Single-Ended Version Two channels running −92 dB
Eight channels running −86 −75 dB
Full-Scale Output Voltage 0.88 (2.48) V rms (V p-p)
Gain Error −10 +10 %
Interchannel Gain Mismatch −0.2 +0.2 dB
Offset Error −25 −4 +25 mV
Gain Drift −30 +30 ppm/°C
