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Data Sheet
AD7927
Rev. D | Page 3 of 28
SPECIFICATIONS
AVDD = VDRIVE = 2.7 V to 5.25 V, REFIN = 2.5 V, fSCLK = 20 MHz; TA = TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 50 kHz sine wave, fSCLK = 20 MHz
70
69.5
dB min
@ 5 V, B models
@ 5 V, W models
69
dB min
@ 3 V Typically 70 dB
70
69.5
dB min
B models
W models
Total Harmonic Distortion (THD
) 277
dB max
@ 5 V Typically 84 dB
73
dB max
@ 3 V Typically 77 dB
Peak Harmonic or Spurious Noise
78
dB max
@ 5 V Typically 86 dB
76
dB max
@ 3 V Typically 80 dB
Intermodulation Distortion
(IMD)2fA = 40.1 kHz, fB = 41.5 kHz
Second-Order Terms
90
dB typ
Third-Order Terms
90
dB typ
Aperture Delay
10
ns typ
Aperture Jitter
50
ps typ
Channel-to-Channel Isolat
ion282
dB typ
fIN = 400 kHz
Full Power Bandwidth
8.2
MHz typ
@ 3 dB
1.6
MHz typ
@ 0.1 dB
Resolution
12
Bits
Integral Nonlinearity
±1
LSB max
Differential Nonlinearity
0.9/+1.5
LSB max
Guaranteed no missed codes to 12 bits
0 V to REFIN Input Range
Straight binary output coding
Offset Error
±8
LSB max
Typically ±0.5 LSB
Offset Error Match
±0.5
LSB max
Gain Error
±1.5
LSB max
Gain Error Match
±0.5
LSB max
0 V to 2 × REFIN Input Range
REFIN to +REFIN biased about REFIN with
Positive Gain Error
±1.5
LSB max
Twos complement output coding
Positive Gain Error Match
±0.5
LSB max
Zero Code Error
±8
LSB max
Typically ±0.8 LSB
Zero Code Error Match
±0.5
LSB max
Negative Gain Error
±1
LSB max
Negative Gain Error Match
±0.5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to REFIN
V
RANGE bit set to 1
0 to 2 × REFIN
V
RANGE bit set to 0, AVDD/VDRIVE = 4.75 V to 5.25 V
DC Leakage Current
±1
μA max
Input Capacitance
20
pF typ
fSAMPLE = 200 kSPS
REFERENCE INPUT
REFIN Input Voltage
2.5
V
±1% specified performance
DC Leakage Current
±1
μA max
REFIN Input Impedance
36
kΩ typ
LOGIC INPUTS
Input High Voltage, VINH
0.7 × VDRIVE
V min
Input Low Voltage, VINL
0.3 × VDRIVE
V max
Input Current, IIN
±1
μA max
Typically 10 nA, VIN = 0 V or VDRIVE
10
pF max