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