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| 型号： | ADS1191IPBSR |
| 厂商： | Texas Instruments |
| 文件页数： | 8/67页 |
| 文件大小： | 0K |
| 描述： | IC AFE 16BIT 8KSPS 1CH 32TQFP |
| 标准包装： | 1,000 |
| 位数： | 16 |
| 通道数： | 1 |
| 电压 - 电源，模拟： | 2.7 V ~ 5.25 V |
| 电压 - 电源，数字： | 1.7 V ~ 3.6 V |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（5x5） |
| 包装： | 带卷 (TR) |
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To MUX TempP
To MUX T
N
emp
2x
1x
8x
AVDD
AVSS
Temperature Sensor Monitor
Temperature ( C) =
°
Temperature Reading ( V)
168,000 V
m
-
m
394 V/ C
m
°
+ 25 C
°
SBAS566A – DECEMBER 2011 – REVISED SEPTEMBER 2012
Auxiliary Differential Input (IN3N, IN3P)
The IN3N and IN3P signals can be used as a third multiplexed differential input channel. These inputs can be
multiplexed to either of the ADC channels.
Temperature Sensor (TempP, TempN)
The ADS1191/2 contain an on-chip temperature sensor. This sensor uses two internal diodes with one diode
having a current density 16x that of the other, as shown in Figure 15. The difference in current densities of the
diodes yields a difference in voltage that is proportional to absolute temperature.
As a result of the low thermal resistance of the package to the printed circuit board (PCB), the internal device
temperature tracks the PCB temperature closely. Note that self-heating of the ADS1191/2 causes a higher
reading than the temperature of the surrounding PCB.
The scale factor of Equation 1 converts the temperature reading to °C. Before using this equation, the
temperature reading code must first be scaled to
μV.
(1)
Figure 15. Measurement of the Temperature Sensor in the Input
Supply Measurements (MVDDP, MVDDN)
Setting CHnSET[2:0] = 011 sets the channel inputs to different supply voltages of the device. For channel 1
(MVDDP – MVDDN) is [0.5(AVDD + AVSS)]; for channel 2 (MVDDP – MVDDN) is DVDD/4. Note that to avoid
saturating the PGA while measuring power supplies, the gain must be set to '1'.
Lead-Off Excitation Signals (LoffP, LoffN)
The lead-off excitation signals are fed into the multiplexer before the switches. The comparators that detect the
lead-off condition are also connected to the multiplexer block before the switches. For a detailed description of
the lead-off block, refer to the Lead-Off Detection subsection in the ECG-Specific Functions section.
Auxiliary Single-Ended Input
The RLDIN pin is primarily used for routing the right leg drive signal to any of the electrodes in case the right leg
drive electrode falls off. However, the RLDIN pin can be used as a multiple single-ended input channel. The
signal at the RLDIN pin can be measured with respect to the voltage at the RLD_REF pin using either channel.
This measurement is done by setting the channel multiplexer setting MUXn[3:0] to '0010' in the CH1SET and
CH2SET registers.
16
Copyright 2011–2012, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1191IRSMR | 制造商:Texas Instruments 功能描述:AFE General Purpose 1ADC 24-Bit 1.8V/3V 32-Pin VQFN EP T/R 制造商:Texas Instruments 功能描述:IC AFE 16BIT 8KSPS 1CH 32VQFN 制造商:Texas Instruments 功能描述:Low Pwr Int AFE for ECG App |
| ADS1191IRSMT | 功能描述:模数转换器 - ADC Cmplt Lw Pwr Intgrtd AFE for ECG apps 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 |
| ADS1192 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Low-Power, 2-Channel, 16-Bit Analog Front-End for Biopotential Measurements |
| ADS1192ECG-FE | 功能描述:数据转换 IC 开发工具 ADS1192 Demo 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 |
| ADS1192IPBS | 功能描述:模数转换器 - ADC Low Pwr Integ AFE 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 |
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