Data Sheet
AD7904/AD7914/AD7924
AD7924 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 3.
Parameter
B Version1
Unit
Test Conditions/Comments
fIN = 50 kHz sine wave, fSCLK = 20 MHz
@ 5 V, B models
@ 5 V, W models
@ 3 V, typically 69.5 dB
B models
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion) (SINAD)2
70
dB min
dB min
dB min
dB min
dB min
dB max
dB max
dB max
69.5
69
Signal-to-Noise Ratio (SNR)
70
69.5
−77
−73
−78
W models
Total Harmonic Distortion (THD)2
@ 5 V, typically −84 dB
@ 3 V, typically −77 dB
@ 5 V, typically −86 dB
fa = 40.1 kHz, fb = 41.5 kHz
Peak Harmonic or Spurious Noise (SFDR)
Intermodulation Distortion (IMD)
Second-Order Terms
Third-Order Terms
Aperture Delay
−90
−90
10
dB typ
dB typ
ns typ
Aperture Jitter
50
ps typ
Channel-to-Channel Isolation2
Full Power Bandwidth
−85
8.2
1.6
dB typ
MHz typ
MHz typ
fIN = 400 kHz
@ 3 dB
@ 0.1 dB
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity (INL)2
Differential Nonlinearity (DNL)2
0 V to REFIN Input Range
Offset Error2
Offset Error Match2
Gain Error2
Gain Error Match2
1
LSB max
LSB max
−0.9/+1.5
Guaranteed no missed codes to 12 bits
Straight binary output coding
Typically 0.5 LSB
8
LSB max
LSB max
LSB max
LSB max
0.5
1.5
0.5
0 V to 2 × REFIN Input Range
−REFIN to +REFIN biased about REFIN with twos
complement output coding
Positive Gain Error2
Positive Gain Error Match2
Zero Code Error2
1.5
0.5
8
0.5
1
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Typically 0.8 LSB
Zero Code Error Match2
Negative Gain Error2
Negative Gain Error Match2
ANALOG INPUT
0.5
Input Voltage Range
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
Input Capacitance
REFERENCE INPUT
REFIN Input Voltage
DC Leakage Current
REFIN Input Impedance
LOGIC INPUTS
1
20
μA max
pF typ
2.5
1
36
V
1% specified performance
fSAMPLE = 1 MSPS
μA max
kΩ typ
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
0.7 × VDRIVE
0.3 × VDRIVE
1
10
V min
V max
μA max
pF max
Typically 10 nA, VIN = 0 V or VDRIVE
3
Input Capacitance, CIN
Rev. C | Page 7 of 32
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