Data Sheet
AD7924 SPECIFICATIONS
AD7904/AD7914/AD7924
AV
DD
= V
DRIVE
= 2.7 V to 5.25 V, REF
IN
= 2.5 V, f
SCLK
= 20 MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
Parameter
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion) (SINAD)
B Version
70
69.5
69
70
69.5
−77
−73
−78
−90
−90
10
50
−85
8.2
1.6
12
±1
−0.9/+1.5
±8
±0.5
±1.5
±0.5
Unit
dB min
dB min
dB min
dB min
dB min
dB max
dB max
dB max
dB typ
dB typ
ns typ
ps typ
dB typ
MHz typ
MHz typ
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Test Conditions/Comments
f
IN
= 50 kHz sine wave, f
SCLK
= 20 MHz
@ 5 V, B models
@ 5 V, W models
@ 3 V, typically 69.5 dB
B models
W models
@ 5 V, typically −84 dB
@ 3 V, typically −77 dB
@ 5 V, typically −86 dB
fa = 40.1 kHz, fb = 41.5 kHz
Signal-to-Noise Ratio (SNR)
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise (SFDR)
Intermodulation Distortion (IMD)
Second-Order Terms
Third-Order Terms
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
Full Power Bandwidth
DC ACCURACY
Resolution
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
0 V to REF
IN
Input Range
Offset Error
Offset Error Match
Gain Error
Gain Error Match
0 V to 2 × REF
IN
Input Range
Positive Gain Error
Positive Gain Error Match
Zero Code Error
Zero Code Error Match
Negative Gain Error
Negative Gain Error Match
ANALOG INPUT
Input Voltage Range
DC Leakage Current
Input Capacitance
REFERENCE INPUT
REF
IN
Input Voltage
DC Leakage Current
REF
IN
Input Impedance
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
f
IN
= 400 kHz
@ 3 dB
@ 0.1 dB
Guaranteed no missed codes to 12 bits
Straight binary output coding
Typically ±0.5 LSB
−REF
IN
to +REF
IN
biased about REF
IN
with twos
complement output coding
±1.5
±0.5
±8
±0.5
±1
±0.5
0 to REF
IN
0 to 2 × REF
IN
±1
20
2.5
±1
36
0.7 × V
DRIVE
0.3 × V
DRIVE
±1
10
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
V
V
μA max
pF typ
V
μA max
kΩ typ
V min
V max
μA max
pF max
Typically ±0.8 LSB
RANGE bit set to 1
RANGE bit set to 0, AV
DD
/V
DRIVE
= 4.75 V to 5.25 V
±1% specified performance
f
SAMPLE
= 1 MSPS
Typically 10 nA, V
IN
= 0 V or V
DRIVE
Rev. C | Page 7 of 32
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