ADS1198

用于 ECG/EEG 测量的低噪声、8 通道、16 位模拟前端

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.

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Eight Low-Noise PGAs and

Eight High-Resolution ADCs

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Low Power: 0.55mW/channel

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Input-Referred Noise:

12µVPP 150Hz BW, G = 6

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Input Bias Current: 200pA

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Data Rate: 125SPS to 8kSPS

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CMRR: –105dB

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Programmable Gain: 1, 2, 3, 4, 6, 8, or 12

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Supports AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards

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Supplies: Unipolar or Bipolar

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Analog: 2.7V to 5.25V

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Digital: 1.65V to 3.6V

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Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, Test Signals

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Pace Detection Channel Select

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Built-In Oscillator and Reference

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Flexible Power-Down, Standby Mode

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SPI™-Compatible Serial Interface

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Operating Temperature Range:

0°C to +70°C