參數(shù)資料
型號(hào)： ADS1245
英文描述： Low-Power, 24-Bit Analog-to-Digital Converter
中文描述： 低功耗，24位模擬數(shù)字轉(zhuǎn)換器
文件頁(yè)數(shù)： 3/19頁(yè)
文件大小： 254K
代理商： ADS1245
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SBAS287A JUNE 2003 REVISED SEPTEMBER 2003
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at TA = 40
°
C to +85
°
C, AVDD = +5V, DVDD = +3V, fCLK = 2.4576MHz, and VREF = +1.25V, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analog Input
Full-scale input voltage range
Absolute input range
Differential input impedance
System Performance
Resolution
Data rate
Integral nonlinearity (INL)
Offset error
Offset error drift(3)
Gain error(4)
Gain error drift(3)
AINP AINN
AINP, AINN with respect to GND
fCLK = 2.4576MHz
±
2VREF
V
V
GND + 0.1
AVDD 1.25
3
G
No missing codes
fCLK = 2.4576MHz
Differential input signal, end point fit
24
Bits
SPS(1)
%FSR
(2)
ppm of FSR
ppm of FSR/
°
C
%
ppm/
°
C
dB
dB
dB
dB
dB
ppm of FSR,
RMS
dB
dB
15
±
0.0006
1
0.01
0.005
0.5
100
±
0.0015
14
0.1
At DC
fCM(5) = 50
±
1Hz, fCLK = 2.4576MHz
fCM = 60
±
1Hz, fCLK = 2.4576MHz
fSIG(6) = 50
±
1Hz, fCLK = 2.4576MHz
fSIG = 60
±
1Hz, fCLK = 2.4576MHz
90
100
100
60
70
Common-mode rejection
Normal-mode rejection
Input referred noise
2
Analog power-supply rejection
Digital power-supply rejection
Voltage Reference Input
Reference input voltage (VREF)
Negative reference input (VREFN)
Positive reference input (VREFP)
Voltage reference impedance
Digital Input/Output
VIH (CLK, SCLK)
VIL (CLK, SCLK)
VOH (DRDY, DOUT)
VOL (DRDY, DOUT)
Input leakage (CLK, SCLK)
CLK frequency (fCLK)
CLK duty cycle
Power Supply
AVDD
DVDD
At DC,
AVDD = 5%
At DC,
AVDD = 5%
100
100
VREF
≡
VREFP VREFN
0.5
1.25
AVDD(7)
VREFP 0.5
AVDD + 0.1
V
V
V
GND 0.1
VREFN + 0.5
fCLK = 2.4576MHz
1
M
0.8 DVDD
GND
DVDD 0.4
GND
5.25
V
V
V
V
μ
A
MHz
%
Logic levels
0.2 DVDD
DVDD
DVDD + 0.4
±
10
6
70
IOH = 1mA
IOL = 1mA
0 < (CLK, SCLK) < DVDD
30
2.7
1.8
5.25
3.6
1
V
V
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
mW
Sleep mode
AVDD = 3V
AVDD = 5V
Sleep mode, CLK stopped
Sleep mode, 2.4576MHZ CLK running
DVDD = 3V
AVDD = DVDD = 3V
0.1
152
158
0.1
1.6
5
0.47
AVDD current
250
DVDD current
5
10
Total power dissipation
(1)SPS = samples per second.
(2)FSR = full-scale range = 4VREF.
(3)Recalibration can reduce these errors to the level of the noise.
(4)Achieving specified gain error performance requires that calibration be performed with reference voltage input between (GND + 0.1V) and
(AVDD 1.25V). See
Voltage Reference Inputs
section.
(5)fCM is the frequency of the common-mode input.
(6)fSIG is the frequency of the input signal.
(7)It will not be possible to reach the digital output full-scale code when VIN > 2VREF.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS1245IDGSR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS1245IDGSRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS1245IDGST 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS1245IDGST 制造商:Texas Instruments 功能描述:IC 24-BIT ADC HIGH-Z I/P BUFFER
ADS1245IDGSTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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