
REV. 0
–3–
AD1871–SPECIFICATIONS
TEST CONDITIONS UNLESS OTHERWISE NOTED
Supply Voltages . . . . . . . . . . . . . . . . . . . . . . 5.0 V
Ambient Temperature . . . . . . . . . . . . . . . . . 25
∞C
Input Clock (fCLKIN) [256
fS] . . . . . . . . . . 12.288 MHz
Input Signal . . . . . . . . . . . . . . . . . . . . . . . . . 991.768 Hz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 dB Full Scale (dBFS) (Differential, PGA/MUX Enabled)
Measurement Bandwidth . . . . . . . . . . . . . . . 23.2 Hz to 19.998 kHz
Word Width . . . . . . . . . . . . . . . . . . . . . . . . . 24 Bits
Load Capacitance on Digital Outputs . . . . . 100 pF
Input Voltage High (VIH) . . . . . . . . . . . . . . . 2.4 V
Input Voltage Low (VIL) . . . . . . . . . . . . . . . 0.8 V
Master Mode, Data I
2S Justified
ANALOG PERFORMANCE
Parameter
Min
Typ
Max
Unit
Conditions
RESOLUTION
24
Bits
DIFFERENTIAL INPUT
PGA/MUX Enabled
Dynamic Range
(20 Hz to 20 kHz, –60 dB Input)
Unweighted
98
103
dB
A-Weighted
100
105
dB
Signal-to-Noise Ratio
106
dB
Total Harmonic Distortion + Noise
–85
dB
Input = –0.5 dBFS
(THD+N)
–103
dB
Input = –20 dBFS
Multibit Modulator Only
Modulator Output @ 5.6448 MHz
Dynamic Range (A-Weighted)
102
dB
SINGLE-ENDED INPUT
PGA/MUX Enabled
Dynamic Range
(20 Hz to 20 kHz, –60 dB Input)
Unweighted
103
dB
A-Weighted
105
dB
Signal-to-Noise Ratio
106
dB
Total Harmonic Distortion + Noise
–85
dB
Input = –0.5 dBFS
(THD+N)
–103
dB
Input = –20 dBFS
DIFFERENTIAL INPUT (BYPASS)
PGA/MUX Disabled
Dynamic Range
(20 Hz to 20 kHz, –60 dB Input)
Unweighted
103
dB
A-Weighted
106
dB
Signal-to-Noise Ratio
106
dB
Total Harmonic Distortion + Noise
–86
dB
Input = –0.5 dBFS
(THD+N)
–104
dB
Input = –20 dBFS
DIFFERENTIAL INPUT (fS = 96 kHz)
PGA/MUX Enabled; AMC = 1
Dynamic Range
(20 Hz to 20 kHz, –60 dB Input)
Unweighted
103
dB
A-Weighted
106
dB
Signal-to-Noise Ratio
106
dB
Total Harmonic Distortion + Noise
–87
dB
Input = –0.5 dBFS
(THD+N)
–104
dB
Input = –20 dBFS
Analog Inputs
Differential Input Range (
± Full Scale)
–2.828
+2.828
V
Input Impedance (PGA/MUX)
8
k
W
Differential
Input Impedance (ByPass)
40
k
W
Differential
Input Impedance (PGA/MUX)
4
k
W
Single Ended
VREF
2.138
2.25
2.363
V
DC Accuracy
Gain Error
–10
%
Interchannel Gain Mismatch
–0.2
–0.01
+0.2
dB
Gain Drift
100
ppm/
∞C
Crosstalk (EIAJ Method)
–100
dB