參數(shù)資料
型號： ADS1222IPWRG4
廠商： Texas Instruments
文件頁數(shù)： 20/26頁
文件大?。?/td> 0K
描述： IC 24BIT ADC W/2CH MUX 14-TSSOP
產(chǎn)品培訓模塊： Data Converter Basics
視頻文件： Nuts and Bolts of the Delta-Sigma Converter
標準包裝： 2,000
位數(shù)： 24
采樣率（每秒）： 240
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 2.25mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 14-TSSOP（0.173"，4.40mm 寬）
供應商設備封裝： 14-TSSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 4 個單端，單極；2 個差分，雙極
ADS1222
SBAS314B APRIL 2004 REVISED JANUARY 2009
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at TA = 40°C to +85°C, VDD = +5V, fCLK = 2MHz, and VREF = +2.5V, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analog Input
Full-scale input voltage
AINP AINN
±2VREF
V
Absolute input voltage
Buffer off; AINP, AINN with respect to GND
GND 0.1
VDD + 0.1
V
Absolute input voltage
Buffer on; AINP, AINN with respect to GND
GND + 0.05
VDD 1.5
V
Differential input impedance
Buffer off; fCLK = 2MHz
2.7
M
Differential input impedance
Buffer on; fCLK = 2MHz
1.2
G
Common-mode input impedance
Buffer off; fCLK = 2MHz
5.4
M
System Performance
Resolution
No missing codes
24
Bits
Data rate
120 (fCLK/2MHz)
SPS(1)
Integral nonlinearity (INL)
Buffer off; Differential input signal, end point fit
0.0003
0.0015
% of FSR(2)
Integral nonlinearity (INL)
Buffer on; Differential input signal, end point fit
0.0006
% of FSR
Offset error
Buffer off
50
150
V
Offset error
Buffer on
50
V
Offset error drift
Buffer off
0.2
V/°C
Offset error drift
Buffer on
0.2
V/°C
Offset error match
Between channels
20
100
V
Gain error
Buffer off
0.004
0.025
%
Gain error
Buffer on
0.008
%
Gain error drift
Buffer off
0.00003
% of FSR/
°C
Gain error drift
Buffer on
0.00006
% of FSR/
°C
Gain error match
Between channels
0.0005
%
Common-mode rejection
Buffer off; at DC
95
dB
Common-mode rejection
Buffer on; at DC
90
100
dB
Power-supply rejection
Buffer off; at DC, VDD = 2.7V to 5.5V
90
dB
Power-supply rejection
Buffer on; at DC, VDD = 2.7V to 5.5V
90
dB
Noise
0.8
ppm of FSR, rms
Temperature Sensor
Temperature sensor voltage
TA = 25°C
106
mV
Temperature sensor coefficient
360
V/°C
Voltage Reference Input
Reference input voltage
VREF = VREFP VREFN
0.5
2.5
VDD(3)
V
Negative reference input
Buffer off
GND 0.1
VREFP 0.5
V
Positive reference input
Buffer off
VREFN + 0.5
VDD + 0.1
V
Negative reference input
Buffer on
GND + 0.05
VREFP 0.5
V
Positive reference input
Buffer on
VREFN + 0.5
VDD 1.5
V
Voltage reference impedance
fCLK = 2MHz
500
k
(1) SPS = samples per second.
(2) FSR = full-scale range = 4VREF.
(3) It will not be possible to reach the digital output full-scale code when VREF > VDD/2.
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