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AD7911/AD7921
Rev. A | Page 5 of 28
AD7921 SPECIFICATIONS
Temperature range for A Grade from 40°C to +85°C.
VDD = 2.35 V to 5.25 V, fSCLK = 5 MHz, fSAMPLE = 250 kSPS; TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 100 kHz sine wave
70
dB min
72
dB typ
71
dB min
72.5
dB typ
Total Harmonic Distortion (T
HD)281
dB typ
Peak Harmonic or Spurious Noise
(SFDR)284
dB typ
Intermodulation Distortion
(IMD)2Second-Order Terms
84
dB typ
fa = 100.73 kHz, fb = 90.72 kHz
Third-Order Term
86
dB typ
fa = 100.73 kHz, fb = 90.72 kHz
Aperture Delay
10
ns typ
Aperture Jitter
30
ps typ
90
dB typ
Full Power Bandwidth
8.5
MHz typ
@ 3 dB
1.5
MHz typ
@ 0.1 dB
DC ACCURACY
Resolution
12
Bits
±1.5
LSB max
0.9/+1.5
LSB max
Guaranteed no missed codes to 12 bits
±1.5
LSB max
±0.5
LSB typ
±0.5
LSB max
± 2
LSB max
±0.3
LSB typ
±1
LSB max
Total Unadjusted Error (TU
E)2±1.5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VDD
V
DC Leakage Current
±0.3
μA max
Input Capacitance
20
pF typ
LOGIC INPUTS
Input High Voltage, VINH
0.7 (VDD)
V min
2.35 V ≤ VDD ≤ 2.7 V
2
V min
2.7 V < VDD ≤ 5.25 V
Input Low Voltage, VINL
0.3
V max
VDD = 2.35 V
0.2 (VDD)
V max
2.35 V < VDD ≤ 2.7 V
0.8
V max
2.7 V < VDD ≤ 5.25 V
Input Current, IIN, SCLK Pin
±0.3
μA max
VIN = 0 V or VDD
Input Current, IIN, CS Pin
±0.3
μA max
Input Current, IIN, DIN Pin
±0.3
μA max
5
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
VDD 0.2
V min
ISOURCE = 200 μA; VDD = 2.35 V to 5.25 V
Output Low Voltage, VOL
0.2
V max
ISINK = 200 μA
Floating-State Leakage Current
±0.3
μA max
5
pF max
Output Coding
Straight (natural) binary
See notes at end of table.