Datasheet

REV. 0
–3–
AD1871–SPECIFICATIONS
TEST CONDITIONS UNLESS OTHERWISE NOTED
Supply Voltages . . . . . . . . . . . . . . . . . . . . . . 5.0 V
Ambient Temperature . . . . . . . . . . . . . . . . . 25∞C
Input Clock (f
CLKIN
) [256 ¥ f
S
] . . . . . . . . . . 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 (V
IH
) . . . . . . . . . . . . . . . 2.4 V
Input Voltage Low (V
IL
) . . . . . . . . . . . . . . . 0.8 V
Master Mode, Data I
2
S 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 (f
S
= 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 kW Differential
Input Impedance (ByPass) 40 kW Differential
Input Impedance (PGA/MUX) 4 kW Single Ended
V
REF
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