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參數資料
| 型號： | AD7722AS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 195 kSPS CMOS, Sigma-Delta ADC |
| 中文描述： | 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL/PARALLEL ACCESS, PQFP44 |
| 封裝： | MS-022AA, MQFP-44 |
| 文件頁數： | 2/24頁 |
| 文件大?。?/td> | 526K |
| 代理商： | AD7722AS |
–2–
REV. 0
AD7722–SPECIFICATIONS
1
(AV
DD
= AV
DD1
= +5 V
6
5%; DV
DD
= +5 V
6
5%; AGND = AGND1 = DGND = 0 V;
UNI
= Logic Low or High; f
CLKLIN
= 12.5 MHz; F
S
= 195.3 kSPS; REF2 = +2.5 V; T
A
= T
MIN
to T
MAX
; unless otherwise noted)
A Version
Typ
Parameter
Test Conditions/Comments
Min
Max
Units
DYNAMIC SPECIFICATIONS
2
Bipolar Mode,
UNI
= V
INH
V
CM
= 2.5 V, V
IN
(+) = V
IN
(–) =1.25 V pk-pk
or, V
IN
(–) =1.25 V, V
IN
(+) = 0 to 2.5
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
CLKIN
= 14 MHz
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
CLKIN
= 14 MHz
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
CLKIN
= 14 MHz
V
IN
(–) = 0 V, V
IN
(+) = 0 to 2.5
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–97.65 kHz
Input Bandwidth 0 kHz–97.65 kHz
Signal to (Noise + Distortion)
3
86/84.5
84.5/83
90
dB
dB
dB
dB
dB
dB
Total Harmonic Distortion
3
–90/–88
–88/–86
–90
–88
Spurious Free Dynamic Range
Unipolar Mode,
UNI
= V
INL
Signal to (Noise + Distortion)
3
Total Harmonic Distortion
3
Spurious Free Dynamic Range
Intermodulation Distortion
AC CMRR
84.5/83
88
dB
dB
dB
dB
–89/–87
–90
–93
V
IN
(+) = V
IN
(–) = 2.5 V pk-pk
V
CM
= 1.25 V to 3.75 V, 20 kHz
96
dB
Digital Filter Response
Pass-Band Ripple
Cutoff Frequency
Stop-Band Attenuation
0 kHz–90.625 kHz
±
0.005
dB
kHz
dB
96.92
104.6875 kHz to 12.395 MHz
90
ANALOG INPUTS
Full-Scale Input Span
Bipolar Mode
Unipolar Mode
Absolute Input Voltage
Input Sampling Capacitance
Input Sampling Rate
Differential Input Impedance
V
IN
(+)–V
IN
(–)
UNI
= V
INH
UNI
= V
INL
V
IN
(+) and V
IN
(–)
–V
REF2
/2
0
0
+V
REF2
/2
V
REF2
AV
DD
V
V
V
pF
Hz
k
2
2
×
f
CLKIN
1/8E-09
f
CLKIN
Guaranteed by Design
CLOCK
CLKIN Mark Space Ratio
45
55
%
REFERENCE
REF1 Output Voltage
REF1 Output Voltage Drift
REF1 Output Impedance
Reference Buffer
Offset Voltage
Using Internal Reference
REF2 Output Voltage
REF2 Output Voltage Drift
Using External Reference
REF2 Input Impedance
External Reference Voltage Range
2.32
2.47
60
3
2.62
V
ppm/
°
C
k
Offset Between REF1 and REF2
±
12
mV
2.32
2.47
60
2.62
V
ppm/
°
C
REF1 = AGND
Applied to REF1 or REF2
1/16E-09
×
f
CLKIN
2.5
k
V
2.32
2.62
STATIC PERFORMANCE
Resolution
Differential Nonlinearity
Integral Nonlinearity
After Calibration
Offset Error
4
Gain Error
4, 5
Without Calibration
Offset Error
Gain Error
5
Offset Error Drift
Gain Error Drift
16
Bits
LSB
LSB
Guaranteed Monotonic
±
0.5
±
2
±
1
±
3
±
0.6
mV
% FSR
±
6
±
0.6
±
1
mV
% FSR
LSB/
°
C
REF2 Is an Ideal Reference, REF1 = AGND
Unipolar Mode
Bipolar Mode
±
1
±
0.5
LSB/
°
C
LSB/
°
C
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