參數(shù)資料
型號： ADS7953SBRHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC32
封裝： GREEN, PLASTIC, PQFP-32
文件頁數(shù)： 62/63頁
文件大?。?/td> 1734K
代理商： ADS7953SBRHBT
SLAS605A – JUNE 2008 – REVISED JANUARY 2010
www.ti.com
ELECTRICAL CHARACTERISTICS, ADS7954/55/56/57 (continued)
+VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Power-down state supply current
1
mA
+VBD supply current
+VA = 5.25V, fs = 1MHz
1
mA
Power-up time
1
mSec
Invalid conversions after power up or
1 Numbers
reset
TEMPERATURE RANGE
Specified performance
–40
125
°C
ELECTRICAL CHARACTERISTICS, ADS7958/59/60/61
+VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Range 1
0
Vref
Full-scale input span(1)
V
Range 2 while 2Vref
≤ +VA
0
2*Vref
VREF
Range 1
–0.20
+0.20
Absolute input range
V
2*VREF
Range 2 while 2Vref
≤ +VA
–0.20
+0.20
Input capacitance
15
rF
Input leakage current
TA = 125°C
61
nA
SYSTEM PERFORMANCE
Resolution
8
Bits
No missing codes
8
Bits
Integral linearity
–0.3
±0.1
0.3
LSB(2)
Differential linearity
–0.3
±0.1
0.3
LSB
Offset error(3)
–0.5
±0.2
0.5
LSB
Range 1
–0.6
±0.1
0.6
Gain error
LSB
Range 2
±0.1
SAMPLING DYNAMICS
Conversion time
20 MHz SCLK
800
nSec
Acquisition time
325
nSec
Maximum throughput rate
20 MHz SCLK
1.0
MHz
Aperture delay
5
nsec
Step response
150
nsec
Over voltage recovery
150
nsec
DYNAMIC CHARACTERISTICS
Total harmonic distortion(4)
100 kHz
–75
dB
Signal-to-noise ratio
100 kHz
49
dB
Signal-to-noise + distortion
100 kHz
49
Spurious free dynamic range
100 kHz
–78
dB
Full power bandwidth
At –3 dB
47
MHz
(1)
Ideal input span; does not include gain or offset error.
(2)
LSB means Least Significant Bit.
(3)
Measured relative to an ideal full-scale input
(4)
Calculated on the first nine harmonics of the input frequency.
8
Copyright 2008–2010, Texas Instruments Incorporated
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