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ADS7822P bảng dữ liệu(PDF) 4 Page - Texas Instruments

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ADS7822P bảng dữ liệu(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS: +VCC = +5V
ADS7822
SBAS062C – JANUARY 1996 – REVISED AUGUST 2007
At –40
°C to +85°C, +V
CC = +5V, VREF = +5V, fSAMPLE = 200kHz, and fCLK = 16 × fSAMPLE, unless otherwise noted.
ADS7822
ADS7822B
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
ANALOG INPUT
Full-scale input span
+In – (–In)
0
VREF
0
VREF
V
+In – GND
–0.2
VCC + 0.2
–0.2
VCC + 0.2
V
Absolute input range
–In – GND
–0.2
+1.0
–0.2
+1.0
V
Capacitance
25
25
pF
Leakage current
±1
±1
μA
SYSTEM PERFORMANCE
Resolution
12
12
Bits
No missing codes
11
12
Bits
Integral linearity error
–2
+2
–1
+1
LSB
(1)
Differential linearity error
±0.8
–1
±0.5
+1
LSB
Offset error
–3
+3
–3
+3
LSB
Gain error
–4
+4
–3
+3
LSB
Noise
33
33
μVrms
Power-supply rejection
70
70
dB
SAMPLING DYNAMICS
Conversion time
12
12
Clk Cycles
Acquisition time
1.5
1.5
Clk Cycles
Throughput rate
200
200
kHz
DYNAMIC CHARACTERISTICS
Total harmonic distortion
VIN = 5VPP at 10kHz
–78
–78
dB
SINAD
VIN = 5VPP at 10kHz
71
71
dB
Spurious-free dynamic range
VIN = 5VPP at 10kHz
79
79
dB
REFERENCE OUTPUT
Voltage range
0.05
VCC
0.05
VCC
V
CS = GND, fSAMPLE = 0Hz
5
5
G
Resistance
CS = VCC
5
5
G
At code 710h
40
100
40
100
μA
Current drain
fSAMPLE = 12.5kHz
2.5
2.5
μA
CS = VCC
0.001
3
0.001
3
μA
DIGITAL INPUT/OUTPUT
Logic family
CMOS
CMOS
VIH
IIH = +5μA
3.0
5.5
3.0
5.5
V
VIL
IIL = +5μA
–0.3
0.8
–0.3
0.8
V
Logic levels
VOH
IOH = –250μA
3.5
3.5
V
VOL
IOL = 250μA
0.4
0.4
V
Data format
Straight Binary
Straight Binary
POWER-SUPPLY REQUIREMENTS
VCC
Specified performance
4.75
5.25
4.75
5.25
V
Quienscent current
fSAMPLE = 200kHz
320
550
320
550
μA
Power down
CS = VCC
3
3
μA
TEMPERATURE RANGE
Specified performance
–40
+85
–40
+85
°C
(1)
LSB means least significant bit. With VREF equal to +5V, one LSB is 1.22mV.
4
Submit Documentation Feedback
Copyright © 1996–2007, Texas Instruments Incorporated
Product Folder Link(s): ADS7822


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