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| 型号： | PADS1298CZXGT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBGA64 |
| 封装： | 8 X 8 MM, LEAD FREE, PLASTIC, NFBGA-64 |
| 文件页数： | 7/73页 |
| 文件大小： | 957K |
| 代理商： | PADS1298CZXGT |
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PRODUCTPREVIEW
www.ti.com
SBAS459C – JANUARY 2010 – REVISED MARCH 2010
OVERVIEW
The
ADS1294/6/8
are
low-power,
multichannel,
simultaneously-sampling,
24-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),
electroencephalography (EEG), and electromyography (EMG) applications. The devices can also be used in
high-performance, multichannel data acquisition systems by powering down the ECG-specific circuitry.
The ADS1294/6/8 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 250SPS to 32kSPS. Communication to the device is accomplished
using an SPI-compatible interface. The device provides four GPIO pins for general use. Multiple devices can be
synchronized using the START pin.
The internal reference can be programmed to either 2.4V or 4V. The internal oscillator generates a 2.048MHz
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 a
pull-up/pull-down resistor or a current source/sink. An internal ac lead-off detection feature is also available. The
device supports both hardware pace detection and software pace detection. The Wilson center terminal (WCT)
block can be used to generate the WCT point of the standard 12-lead ECG.
Copyright 2010, Texas Instruments Incorporated
15
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