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ADS1205 bảng dữ liệu(PDF) 3 Page - Texas Instruments

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tên linh kiện ADS1205
Giải thích chi tiết về linh kiện  TWO 1-BIT, 10MHz, 2nd-ORDER DELTA-SIGMA MODULATORS
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ADS1205 bảng dữ liệu(HTML) 3 Page - Texas Instruments

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ADS1205
SBAS312A − JANUARY 2005 − REVISED APRIL 2005
www.ti.com
3
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range at −40
°C to +85°C, AVDD = 5V, BVDD = 3V, CH x+ = 0.5V to 4.5V, CH x− = 2.5V,
REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc3 filter with decimation by 256, unless otherwise noted.
ADS1205I
PARAMETER
TEST CONDITIONS
MIN
TYP(1)
MAX
UNITS
Resolution
16
Bits
DC Accuracy
INL
Integral linearity error(2)
−1.4
±3
LSB
INL
Integral linearity error(2)
−0.002
±0.005 % FSR
Integral linearity match
6
LSB
Integral linearity match
0.009
% FSR
DNL
Differential nonlinearity(3)
±1
LSB
VOS
Input offset error(4)
−1.2
±3
mV
Input offset error match
0.1
2
mV
TCVOS
Input offset error drift
1.1
8
µV/°C
GERR
Gain error(4)
Referenced to VREF
−0.01
±0.5 % FSR
Gain error match
0.09
0.5
% FSR
TCGERR
Gain error drift
1.3
ppm/
°C
PSRR
Power-supply rejection ratio
4.75V < AVDD < 5.25V
78
dB
Analog Input
FSR
Full-scale differential range
(CH x+) − (CH x−); CH x− = 2.5V
±2.5
V
Specified differential range
(CH x+) − (CH x−); CH x− = 2.5V
±2
V
Maximum operating input range(3)
0
AVDD
V
Input capacitance
Common-mode
3
pF
Input leakage current
CLK turned off
±1
nA
Differential input resistance
100
k
Differential input capacitance
2.5
pF
CMRR
Common-mode rejection ratio
At DC
108
dB
CMRR
Common-mode rejection ratio
VIN = ±1.25VPP at 40kHz
117
dB
BW
Bandwidth
FS sine wave, −3dB
50
MHz
Sampling Dynamics
Internal clock frequency
CLKSEL = 1
8
9.8
12
MHz
CLKIN
External clock frequency(5)
CLKSEL = 0
1
20
24
MHz
AC Accuracy
THD
Total harmonic distortion
VIN = ±2VPP at 5kHz
−96.6
−88
dB
SFDR
Spurious-free dynamic range
VIN = ±2VPP at 5kHz
92
98
dB
SNR
Signal-to-noise ratio
VIN = ±2VPP at 5kHz
86
88.9
dB
SINAD
Signal-to-noise + distortion
VIN = ±2VPP at 5kHz
85
88.2
dB
Channel-to-channel isolation(3)
VIN = ±2VPP at 50kHz
100
dB
ENOB
Effective number of bits
14
14.5
Bits
(1) All typical values are at TA = +25°C.
(2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the specified input range of the transfer curve
for CH x+ = −2V to +2V at 2.5V, expressed either as the number of LSBs or as a percent of measured input range (4V).
(3) Ensured by design.
(4) Maximum values, including temperature drift, are ensured over the full specified temperature range.
(5) With reduced accuracy, the clock frequency can go from 1MHz to 33MHz.
(6) Applicable for 5.0V nominal supply: BVDD (min) = 4.5V and BVDD (max) = 5.5V.
(7) Applicable for 3.0V nominal supply: BVDD (min) = 2.7V and BVDD (max) = 3.6V.


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