AD7911/AD7921
Rev. A | Page 5 of 28
AD7921 SPECIFICATIONS
Temperature range for A Grade from −40°C to +85°C.
V
DD
= 2.35 V to 5.25 V, f
SCLK
= 5 MHz, f
SAMPLE
= 250 kSPS; T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter A Grade
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 100 kHz sine wave
Signal-to-Noise and Distortion (SINAD)
2
70 dB min
72 dB typ
Signal-to-Noise Ratio (SNR)
2
71 dB min
72.5 dB typ
Total Harmonic Distortion (THD)
2
−81 dB typ
Peak Harmonic or Spurious Noise (SFDR)
2
−84 dB typ
Intermodulation Distortion (IMD)
2
Second-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
Channel-to-Channel Isolation
2
−90 dB typ
Full Power Bandwidth 8.5 MHz typ @ 3 dB
1.5 MHz typ @ 0.1 dB
DC ACCURACY
Resolution 12 Bits
Integral Nonlinearity
2
±1.5 LSB max
Differential Nonlinearity
2
−0.9/+1.5 LSB max Guaranteed no missed codes to 12 bits
Offset Error
2
±1.5 LSB max
±0.5 LSB typ
Offset Error Match
2, 3
±0.5 LSB max
Gain Error
2
± 2 LSB max
±0.3 LSB typ
Gain Error Match
2, 3
±1 LSB max
Total Unadjusted Error (TUE)
2
±1.5 LSB max
ANALOG INPUT
Input Voltage Ranges 0 to V
DD
V
DC Leakage Current ±0.3 μA max
Input Capacitance 20 pF typ
LOGIC INPUTS
Input High Voltage, V
INH
0.7 (V
DD
) V min 2.35 V ≤ V
DD
≤ 2.7 V
2 V min 2.7 V < V
DD
≤ 5.25 V
Input Low Voltage, V
INL
0.3 V max V
DD
= 2.35 V
0.2 (V
DD
) V max 2.35 V < V
DD
≤ 2.7 V
0.8 V max 2.7 V < V
DD
≤ 5.25 V
Input Current, I
IN
, SCLK Pin ±0.3 μA max V
IN
= 0 V or V
DD
Input Current, I
IN
,
CS
Pin
±0.3 μA max
Input Current, I
IN
, DIN Pin ±0.3 μA max
Input Capacitance, C
IN
3
5 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DD
− 0.2 V min I
SOURCE
= 200 μA; V
DD
= 2.35 V to 5.25 V
Output Low Voltage, V
OL
0.2 V max I
SINK
= 200 μA
Floating-State Leakage Current ±0.3 μA max
Floating-State Output Capacitance
3
5 pF max
Output Coding Straight (natural) binary
See notes at end of table.
