The ADS1293 incorporates all features commonly required in portable, low-power medical, sports, and fitness electrocardiogram (ECG) applications. With high levels of integration and exceptional performance, the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.
The ADS1293 features three high-resolution channels capable of operating up to 25.6 ksps. Each channel can be independently programmed for a specific sample rate and bandwidth allowing users to optimize the configuration for performance and power. All input pins incorporate an EMI filter and can be routed to any channel through a flexible routing switch. Flexible routing also allows independent lead-off detection, right-leg drive, and Wilson/Goldberger reference terminal generation without the need to reconnect leads externally. A fourth channel allows external analog pace detection for applications that do not use digital pace detection.
The ADS1293 incorporates a self-diagnostics alarm system to detect when the system is out of the operating conditions range. Such events are reported to error flags. The overall status of the error flags is available as a signal on a dedicated ALARMB pin.
The device is packaged in a 5-mm × 5-mm × 0.8-mm, 28-pin LLP. Operating temperature ranges from –20°C to 85°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
ADS1293 | WQFN (28) | 5.00 mm x 5.00 mm |
Changes from B Revision (March 2013) to C Revision
PIN | TYPE | FUNCTION | ||
---|---|---|---|---|
NAME | NO. | |||
IN1 - IN6 | 1 - 6 | Analog Input | Electrode input signals | |
WCT | 7 | Analog Output | Wilson reference output or analog pace channel output | |
CMOUT | 8 | Output | Common-mode detector output | |
RLDOUT | 9 | Analog Output | Right-leg drive amplifier output | |
RLDINV | 10 | Analog Input | Right-leg drive amplifier negative input | |
RLDIN | 11 | Analog I/O | Right-leg drive amplifier positive input or analog pace channel output | |
RLDREF | 12 | Analog Output | Internal right-leg drive reference | |
SYNCB | 13 | Digital I/O | Sync bar; multiple-chip synchronization signal input or output | |
VSSIO | 14 | Digital Supply | Digital input/output supply ground | |
ALARMB | 15 | Digital Output | Alarm bar | |
CSB | 16 | Digital Input | Chip-select bar | |
SCLK | 17 | Digital Input | Serial clock | |
SDI | 18 | Digital Input | Serial data input | |
SDO | 19 | Digital Output | Serial data output | |
DRDYB | 20 | Digital Output | Data ready bar | |
CLK | 21 | Digital I/O | Internal clock output or external clock input | |
VDDIO | 22 | Digital Supply | Digital input/output supply | |
XTAL1 | 23 | Digital Input | External crystal for clock oscillator | |
XTAL2 | 24 | Digital Input | External crystal for clock oscillator | |
RSTB | 25 | Digital Input | Reset bar | |
CVREF | 26 | Analog I/O | External cap for internal reference voltage | |
VSS | 27 | Analog Supply | Power supply ground | |
VDD | 28 | Analog Supply | Positive power supply | |
DAP | — | — | No connect |