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參數(shù)資料
| 型號： | ADS1191IPBSR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 43/67頁 |
| 文件大小： | 0K |
| 描述： | IC AFE 16BIT 8KSPS 1CH 32TQFP |
| 標準包裝： | 1,000 |
| 位數(shù)： | 16 |
| 通道數(shù)： | 1 |
| 電壓 - 電源，模擬： | 2.7 V ~ 5.25 V |
| 電壓 - 電源，數(shù)字： | 1.7 V ~ 3.6 V |
| 封裝/外殼： | 32-TQFP |
| 供應商設備封裝： | 32-TQFP（5x5） |
| 包裝： | 帶卷 (TR) |
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51 k
47 nF
51 k
47 nF
4-Bit
DAC
Skin,
Electrode Contact
Model
Patient
Protection
Resistor
AVDD
LOFF1P/
LOFF2P
AVSS
LOFF1N/
LOFF2N
RLD OUT
To ADC
IN1P_OFF/
IN2P_OFF
IN1N_OFF/
IN2N_OFF
COMP_TH[2:0]
V
INP
V
INN
PGA
EMI
Filter
Patient
30 k
SBAS566A – DECEMBER 2011 – REVISED SEPTEMBER 2012
LEAD-OFF DETECTION
Patient electrode impedances are known to decay over time. It is necessary to continuously monitor these
electrode connections to verify a suitable connection is present. The ADS1191/2 lead-off detection functional
block provides significant flexibility to the user to choose from various lead-off detection strategies. Though called
lead-off detection, this is in fact an electrode-off detection.
The basic principle is to inject an excitation signal and measure the response to find out if the electrode is off. As
shown in the lead-off detection functional block diagram in Figure 44, this circuit provides two different methods
of determining the state of the patient electrode. The methods differ in the frequency content of the excitation
signal. Lead-off can be selectively done on a per channel basis using the LOFF_SENS register. Also, the internal
excitation circuitry can be disabled and just the sensing circuitry can be enabled.
NOTE: The RP value must be selected in order to be below the maximum allowable current flow into a patient (in accordance with the
relevant specification the latest revision of IEC 60601).
Figure 44. Lead-Off Detection
48
Copyright 2011–2012, Texas Instruments Incorporated
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相關代理商/技術參數(shù) |
參數(shù)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:模數(shù)轉換器 - ADC Cmplt Lw Pwr Intgrtd AFE for ECG apps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1192 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 2-Channel, 16-Bit Analog Front-End for Biopotential Measurements |
| ADS1192ECG-FE | 功能描述:數(shù)據(jù)轉換 IC 開發(fā)工具 ADS1192 Demo Kit RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS1192IPBS | 功能描述:模數(shù)轉換器 - ADC Low Pwr Integ AFE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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