AD1878 Datasheet, PDF (2/16 Pages) Analog Devices – High Performance 16-/18-Bit Stereo ADCs

AD1878/AD1879–SPECIFICATIONS
TEST CONDITIONS UNLESS OTHERWISE NOTED
Supply Voltages
±5
V
Ambient Temperature
25
°C
Input Clock (F_CLOCK)
12.288
MHz
Input Signal
974
Hz
–0.5
dB Full Scale
All minimums and maximums tested except as noted.
ANALOG PERFORMANCE
Min
Typ
Max
AD1879 Resolution
AD1878 Resolution
Clock Input Frequency Range
CLOCK Input (F_CLOCK)
Modulator Sample Rate (F_CLOCK/4)
Output Word Rate (F_S = F_CLOCK/256)
AD1879 Dynamic Range (0 kHz to 20 kHz, –60 dB input)
Stereo Mode (No A-Weight Filter)
Mono Mode¹ (No A-Weight Filter)
Stereo Mode (with A-Weight Filter)
AD1879 Trimmed² Signal to (Noise + Distortion)
Full Scale
–20 dB
AD1879 Untrimmed³ Signal to (Noise + Distortion)
Full Scale
–20 dB
AD1879 Trimmed² Signal to Total Harmonic Distortion
Full Scale
–20 dB
AD1878 Dynamic Range (0 kHz to 20 kHz, –60 dB 1.0936 kHz
Input Dithered with a –10 dB 21.873 kHz Sine Wave)
Stereo Mode (No A-Weight Filter)
AD1878 Trimmed² Signal to (Noise + Distortion)
Full Scale
–20 dB
AD1878 Untrimmed³ Signal to (Noise + Distortion)
Full Scale
–20 dB
AD1878 Trimmed² Signal to Total Harmonic Distortion
Full Scale
–20 dB
Analog Inputs
Differential Input Range⁴
Input Impedance at Each Input Pin
DC Accuracy
Gain Error
Interchannel Gain Mismatch
Gain Drift
AD1879 Midscale Offset Error
AD1878 Midscale Offset Error
Midscale Drift
Voltage Reference
Crosstalk (EIAJ Method)
Interchannel Phase Deviation
0.01
0.0025
0.039
100
93
91
18
16
12.288
3.072
48
103
106
105
98
83
96
83
98
100
14.286
3.5715
55.8
95
93
91
± 5.985
2.4
100
97
95
77
94
77
98
100
± 6.3
7.0
±1
0.05
150
± 200
± 50
13
2.86
105
± 0.001
± 6.615
±5
0.15
± 750
± 200
3.2
NOTES
1_{Both channels connected together for mono operations as described below in “How to Extend SNR.”}
2_{Differential gain imbalance manually trimmed to eliminate second harmonic. See “Applications Issues” below.}
3_{Test performed without part-to-part trimming.}
4_{The differential input range is twice the range seen at each input pin. The input range corresponds to the full-scale digital output range.}
Specifications subject to change without notice.
Units
Bits
Bits
MHz
MHz
kHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
V
kΩ
%
dB
ppm/°C
18-Bit LSBs
16-Bit LSBs
ppm/°C
V
dB
Degrees
–2–
REV. 0