ADAU1979 Datasheet, PDF (3/44 Pages) Analog Devices – Quad Analog-to-Digital Converter (ADC)

Data Sheet
ADAU1979
SPECIFICATIONS
Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase deviation specifications.
AVDDx/IOVDD = 3.3 V; DVDD (internally generated) = 1.8 V; TA = −40°C to +105°C, unless otherwise noted. Master clock = 12.288 MHz
(48 kHz fS, 256 × fS 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; digital input voltage high = 2.0 V; and digital input voltage low = 0.8 V.
ANALOG PERFORMANCE SPECIFICATIONS
Table 1.
Parameter
LINE INPUT
Full Scale AC Differential Input Voltage
Full Scale Single-Ended Input Voltage
Input Common-Mode Voltage
ANALOG-TO-DIGITAL CONVERTERS
Differential Input Resistance
Single-Ended Input Resistance
ADC Resolution
Dynamic Range (A-Weighted) Line Input¹
Total Harmonic Distortion + Noise (THD + N)
Digital Gain Post ADC
Gain Error
Interchannel Gain Mismatch
Gain Drift
Common-Mode Rejection Ratio (CMRR)
Power Supply Rejection Ratio (PSRR)
Interchannel Isolation
Interchannel Phase Deviation
REFERENCE
Internal Reference Voltage
Output Impedance
ADC SERIAL PORT
Output Sample Rate
Test Conditions/Comments
VIN, cm at AINx/AINx pins
Between AINx and AINx
Between AINx and AINx
Input = 1 kHz, −60 dBFS (0 dBFS = 4.5 V rms input)
Input = 1 kHz, −1 dBFS (0 dBFS = 4.5 V rms input)
400 mV rms, 1 kHz
400 mV rms, 20 kHz
100 mV rms, 1 kHz on AVDD = 3.3 V
VREF pin
Min Typ Max Unit
4.18 4.5 4.82 V rms
2.09 2.25 2.41 V rms
1.5
V dc
103
0
−10
−0.25
50
64.34
32.17
24
109
−95
100
65
56
70
100
0
−87
60
+10
+0.25
kΩ
kΩ
Bits
dB
dB
dB
%
dB
ppm/°C
dB
dB
dB
dB
Degrees
1.47 1.50 1.54 V
20
kΩ
8
192 kHz
1 _{This is for a sampling frequency, fS, ranging from 44.1 kHz to 192 kHz.}
DIGITAL INPUT/OUTPUT SPECIFICATIONS
Table 2.
Parameter
INPUT
High Level Input Voltage (VIH)
Low Level Input Voltage (VIL)
Input Leakage Current
Input Capacitance
OUTPUT
High Level Output Voltage (VOH)
Low Level Output Voltage (VOL)
Test Conditions/Comments
IOH = 1 mA
IOL = 1 mA
Min
0.7 × IOVDD
−10
IOVDD − 0.60
Typ Max
Unit
V
0.3 × IOVDD
V
+10
µA
5
pF
V
0.4
V
Rev. 0 | Page 3 of 44