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ADS7816U bảng dữ liệu(PDF) 2 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  12-Bit High Speed Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
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2
®
ADS7816
SPECIFICATIONS
At –40
°C to +85°C, +V
CC = +5V, VREF = +5V, fSAMPLE = 200kHz, fCLK = 16 • fSAMPLE, unless otherwise specified.
ADS7816
ADS7816B
ADS7816C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ANALOG INPUT
Full-Scale Input Span
+In – (–In)
0
VREF
TT
TT
V
Absolute Input Voltage
+In
–0.2
VCC +0.2
TT
TT
V
–In
–0.2
+0.2
TT
TT
V
Capacitance
25
TT
pF
Leakage Current
±1
TT
µA
SYSTEM PERFORMANCE
Resolution
12
TT
Bits
No Missing Codes
11
12
T
Bits
Integral Linearity Error
±0.5
±2
±0.5
±2
±0.5
±1
LSB(1)
Differential Linearity Error
±0.5
±2
±0.5
±1
±0.25
±0.75
LSB
Offset Error
±4
TT
LSB
Gain Error
±4
TT
LSB
Noise
33
TT
µVrms
Power Supply Rejection
82
TT
dB
SAMPLING DYNAMICS
Conversion Time
12
TT
Clk Cycles
Acquisition Time
1.5
TT
Clk Cycles
Throughput Rate
200
TT
kHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
VIN = 5.0Vp-p at 1kHz
–84
TT
dB
VIN = 5.0Vp-p at 5kHz
–82
TT
dB
SINAD
VIN = 5.0Vp-p at 1kHz
72
TT
dB
Spurious Free Dynamic Range
VIN = 5.0Vp-p at 1kHz
86
TT
dB
REFERENCE INPUT
Voltage Range
0.1
5
TT
TT
V
Resistance
CS = GND, fSAMPLE = 0Hz
5
TT
G
CS = VCC
5
TT
G
Current Drain
At Code 710h
38
100
TT
TT
µA
fSAMPLE = 12.5kHz
2.4
20
TT
TT
µA
CS = VCC
0.001
3
TT
TT
µA
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
TT
Logic Levels:
VIH
IIH = +5µA3
+VCC +0.3
TT
TT
V
VIL
IIL = +5µA
–0.3
0.8
TT
TT
V
VOH
IOH = –250µA
3.5
TT
V
VOL
IOL = 250µA
0.4
TT
V
Data Format
Straight Binary
TT
POWER SUPPLY REQUIREMENTS
VCC
Specified Performance
4.50
5.25
TT
TT
V
Quiescent Current
380
700
TT
TT
µA
fSAMPLE = 12.5kHz(2, 3)
30
TT
µA
fSAMPLE = 12.5kHz(3)
280
400
TT
µA
Power Down
CS = VCC, fSAMPLE = 0Hz
3
TT
µA
TEMPERATURE RANGE
Specified Performance
–40
+85
TT
TT
°C
T Specifications same as grade to the left.
NOTE: (1) LSB means Least Significant Bit, with VREF equal to +5V, one LSB is 1.22mV. (2) fCLK = 3.2MHz, CS = VCC for 251 clock cycles out of every 256. (3) See
the Power Dissipation section for more information regarding lower sample rates.


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