ADS1194 - 用于 ECG 的低功耗、4 通道、16 位模拟前端

ADS1194是TI德州仪器公司的一款医疗电子模拟前端产品，ADS1194是用于 ECG 的低功耗、4 通道、16 位模拟前端，本站介绍了ADS1194的封装应用图解、特点和优点、功能等，并给出了与ADS1194相关的TI元器件型号供参考。

ADS1194 - 用于 ECG 的低功耗、4 通道、16 位模拟前端 - 医疗电子模拟前端 - 模拟前端(AFE) - 德州仪器

产品描述

The ADS1194/6/8 are a family of multichannel, simultaneous sampling, 16-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator.

With its high levels of integration and exceptional performance, the ADS1194/6/8 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1194/6/8 have a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of input channels can be selected for derivation of the right leg drive (RLD) output signal. The ADS1194/6/8 operate at data rates as high as 8kSPS, thereby allowing the implementation of software pace detection. Lead-off detection can be implemented internal to the device, either with a pull-up/pull-down resistor or an excitation current sink/source. Three integrated amplifiers generate the Wilson Center Terminal (WCT) and the Goldberger terminals (GCT) required for a standard 12-lead medical electrocardiogram (ECG).

Multiple ADS1194/6/8 devices can be cascaded in high channel count systems in a daisy-chain configuration.

Package options include a tiny 8mm × 8mm, 64-ball BGA and a TQFP-64. Both packages are specified over the temperature range of 0°C to +70°C.

产品特性

Eight Low-Noise PGAs and Eight High-Resolution ADCs (ADS1198)
Low Power: 0.55mW/channel
Input-Referred Noise: 12µVPP (150Hz BW, G = 6)
Input Bias Current: 200pA
Data Rate: 125SPS to 8kSPS
CMRR: –105dB
Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
Supports AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards
Supplies: Unipolar or Bipolar
- Analog: 2.7V to 5.25V
- Digital: 1.65V to 3.6V
Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, Test Signals
Pace Detection Channel Select
Built-In Oscillator and Reference
Flexible Power-Down, Standby Mode
SPI™-Compatible Serial Interface
Operating Temperature Range: 0°C to +70°C

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