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ADS1192IRSMR Datasheet(PDF) 13 Page - Texas Instruments |
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ADS1192IRSMR Datasheet(HTML) 13 Page - Texas Instruments |
13 / 67 page DRDY CLK CLKSEL Oscillator Power-Supply Signal SPI DVDD DGND RLD INV RLD OUT (AVDD + AVSS)/2 Lead-Off Excitation Source GPIO1/ RCLK GPIO2/ RCLK RESP CS SCLK DIN DOUT RLDIN/ RLDREF Temperature Sensor Input RLD Amplifier Reference Control START PWDN/ RESET AVDD AVSS Test Signal MUX PGA1 ADC1 PG A2 IN1P IN1N EMI Filter ADC2 IN2P IN2N EMI Filter PGA2N PGA2P PGA1P PGA1N VREFP VREFN VCAP2 VCAP1 V ADS1191 ADS1192 www.ti.com SBAS566A – DECEMBER 2011 – REVISED SEPTEMBER 2012 OVERVIEW The ADS1191/2 are low-power, multichannel, simultaneously-sampling, 16-bit delta-sigma ( ΔΣ) analog-to-digital converters (ADCs) with integrated programmable gain amplifiers (PGAs). These devices integrate various ECG- specific functions that make them well-suited for scalable electrocardiogram (ECG), sports, and fitness applications. The devices can also be used in high-performance, multichannel data acquisition systems by powering down the ECG-specific circuitry. The ADS1191/2 have a highly programmable multiplexer that allows for temperature, supply, input short, and RLD measurements. Additionally, the multiplexer allows any of the input electrodes to be programmed as the patient reference drive. The PGA gain can be chosen from one of seven settings (1, 2, 3, 4, 6, 8, and 12). The ADCs in the device offer data rates from 125 SPS to 8 kSPS. Communication to the device is accomplished using an SPI-compatible interface. The device provides two general-purpose I/O (GPIO) pins for general use. Multiple devices can be synchronized using the START pin. The internal reference can be programmed to either 2.42 V or 4.033 V. The internal oscillator generates a 512- kHz clock. The versatile right leg drive (RLD) block allows the user to choose the average of any combination of electrodes to generate the patient drive signal. Lead-off detection can be accomplished either by using an external pull-up/pull-down resistor or the device internal current source/sink. An internal ac lead-off detection feature is also available. A detailed diagram of the ADS1191/2 is shown in Figure 13. Figure 13. Functional Block Diagram Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback 13 Product Folder Links: ADS1191 ADS1192 |
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