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ADS7830 bảng dữ liệu(PDF) 5 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  8-Bit, 8-Channel Sampling ANALOG-TO-DIGITAL CONVERTER with I2C??Interface
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ADS7830 bảng dữ liệu(HTML) 5 Page - Texas Instruments

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ADS7830
www.ti.com
SBAS302C – DECEMBER 2003 – REVISED OCTOBER 2012
ELECTRICAL CHARACTERISTICS: +5V
At TA = –40°C to +125°C, +VDD = +5.0V, VREF = External +5.0V, and SCL Clock Frequency = 3.4MHz (High-Speed Mode),
unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-Scale Input Scan
Positive Input – Negative Input
0
VREF
V
Positive Input
–0.2
+VDD + 0.2
V
Absolute Input Range
Negative Input
–0.2
+0.2
V
Capacitance
25
pF
Leakage Current
±1
µA
SYSTEM PERFORMANCE
No Missing Codes
8
Bits
Integral Linearity Error
±0.1
±0.5
LSB(1)
Differential Linearity Error
±0.1
±0.5
LSB
Offset Error
+0.5
+1
LSB
Offset Error Match
±0.05
±0.25
LSB
Gain Error
±0.1
±0.5
LSB
Gain Error Match
±0.05
±0.25
LSB
Noise
100
µVRMS
Power-Supply Rejection
72
dB
SAMPLING DYNAMICS
High-Speed Mode: SCL = 3.4MHz
70
kSPS(2)
Throughput Frequency
Fast Mode: SCL = 400kHz
10
kSPS
Standard Mode, SCL = 100kHz
2.5
kSPS
Conversion Time
5
µs
AC ACCURACY
Total Harmonic Distortion
VIN = 5VPP at 1kHz
–72
dB(3)
Signal-to-Ratio
VIN = 5VPP at 1kHz
50
dB
Signal-to-(Noise+Distortion) Ratio
VIN = 5VPP at 1kHz
49
dB
Spurious-Free Dynamic Range
VIN = 5VPP at 1kHz
68
dB
Isolation Channel-to-Channel
90
dB
VOLTAGE REFERENCE OUTPUT
TA = –40°C to +85°C
2.48
2.52
V
Range
TA = –40°C to +125°C
2.47
2.53
V
TA = –40°C to +85°C
15
ppm/°C
Internal Reference Drift
TA = –40°C to +125°C
40
ppm/°C
Internal Reference ON
110
Ω
Output Impedance
Internal Reference OFF
1
G
Ω
Internal Reference ON,
Quiescent Current
1300
µA
SCL and SDA pulled HIGH
VOLTAGE REFERENCE INPUT
Range
0.05
VDD
V
Resistance
1
G
Ω
Current Drain
High-Speed Mode: SCL= 3.4MHz
20
µA
(1)
LSB means least significant bit. When VREF = 2.5V, 1LSB is 9.8mV.
(2)
kSPS means kilo samples-per-second.
(3)
THD measured out to the 9th-harmonic.
Copyright © 2003–2012, Texas Instruments Incorporated
Submit Documentation Feedback
5
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