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| 型号： | ADS7945SRTET |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16 |
| 封装： | GREEN, PLASTIC, QFN-16 |
| 文件页数： | 34/49页 |
| 文件大小： | 1322K |
| 代理商： | ADS7945SRTET |
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SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS: ADS7945 (Differential) (continued)
Minimum/maximum specifications at TA = –40°C to +125°C, AVDD = 2.7 V to 5.25 V, DVDD = 1.65 V to AVDD, input
common-mode = VREF/2 ± 0.2, and fSAMPLE = 2 MSPS, unless otherwise noted.
Typical specifications at TA = +25°C, AVDD = 5 V, DVDD = 1.8 V, input common-mode = VREF/2 ± 0.2, and fSAMPLE = 2 MSPS.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUT/OUTPUT
Logic family
CMOS
VIH
0.7DVDD
V
VIL
0.3DVDD
V
Logic level
VOH
SDO load 20 pF
0.8DVDD
V
VOL
SDO load 20 pF
0.2DVDD
V
Input leakage current
IIH, IIL
0
< VIN < DVDD
±20
nA
External reference
2.5
AVDD
V
POWER-SUPPLY REQUIREMENTS
AVDD
2.7
3.3
5.25
V
DVDD
1.65
3.3
AVDD
V
AVDD = 3.3 V, fSAMPLE = 2 MSPS
3.5
4
mA
IDYNAMIC
AVDD = 5 V, fSAMPLE = 2 MSPS
4
5
mA
AVDD supply current
AVDD = 3.3 V, SCLK off
2.3
mA
ISTATIC
AVDD = 5 V, SCLK off
2.5
3
mA
DVDD = 3.3 V, fSAMPLE = 2 MSPS,
DVDD supply current(9)
750
A
SDO load 20 pF
IPD-DYNAMIC
SCLK = 40 MHz
550
A
Power-down state
AVDD supply current
IPD-STATIC
SCLK off
2.5
A
Power-up time
From power-down state using PDEN pin
1
s
TEMPERATURE RANGE
Specified performance
–40
+125
°C
(9)
DVDD consumes only dynamic current. IDVDD = CLOAD × DVDD × number of 0→1 transitions in SDO × fSAMPLE.
This is a load-dependent current and there is no DVDD current when the output is not toggling.
4
Copyright
2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
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|---|---|
| ADS7946 | 制造商:TI 制造商全称:Texas Instruments 功能描述:14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters |
| ADS7946EVM-PDK | 功能描述:数据转换 IC 开发工具 ADS7946 PERF DEM KIT RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS7946SRTER | 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS7946SRTET | 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS7947 | 制造商:TI 制造商全称:Texas Instruments 功能描述:12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-Digital Converters |
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