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參數(shù)資料
| 型號(hào)： | ADS1194CZXGT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBGA64 |
| 封裝： | 8 X 8 MM, GREEN, PLASTIC, NFBGA-64 |
| 文件頁數(shù)： | 52/76頁 |
| 文件大?。?/td> | 1193K |
| 代理商： | ADS1194CZXGT |
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51kW
100kW
47nF
51kW
100kW
47nF
4-Bit
DAC
Skin,
ElectrodeContact
Model
Patient
Protection
Resistor
AVDD
LOFF_SENSP
VLEAD_OFF_EN
AND
AVSS
LOFF_SENSN
VLEAD_OFF_EN
AND
LOFF_SENSP
VLEAD_OFF_EN
AND
LOFF_SENSN
VLEAD_OFF_EN
AND
RLDOUT
FLEAD_OFF[1:0]
Vx
3.3MW
AntialiasingFilter
<512kHz
FLEAD_OFF[0:1]
AVDD
AVSS
ToADC
LOFF_STATP
LOFF_STATN
COMP_TH[2:0]
V
INP
V
INN
(AVDD+AVSS)/2
7MW
10pF
PGA
EMI
Filter
12pF
Patient
SBAS471B
– APRIL 2010 – REVISED APRIL 2011
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 ADS1194/6/8 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 46, 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_SENSP and LOFF_SENSN
registers. Also, the internal excitation circuitry can be disabled and just the sensing circuitry can be enabled.
Figure 46. Lead-Off Detection
56
Copyright
2010–2011, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS1194IPAG | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power 8-Channel 16-Bit Analog Front-End for Biopotential Measurements |
| ADS1194IPAGR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power 8-Channel 16-Bit Analog Front-End for Biopotential Measurements |
| ADS1196 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements |
| ADS1196CPAG | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Pwr6Ch16B Ana Front-End for ECG 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 |
| ADS1196CPAG | 制造商:Texas Instruments 功能描述:; Resolution (Bits):16bit; Sampling Rate 制造商:Texas Instruments 功能描述:IC, ADC, 6CH, 16BIT, 8KSPS, TQFP-64 |
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