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.
|# Input Channels|
|Analog Voltage AVDD (Min) (V)|
|Analog Voltage AVDD (Max) (V)|
|Gain Drift (Typ) (ppm/C)|
|Gain Error (Typ) (%)|
|Input-referred Noise (Typ) (uVpp)|
|IDVDD Supply Current (Typ) (mA)|
|Digital Supply (Max) (V)|
|Digital Supply (Min) (V)|
|Offset Error (Typ) (uV)|
|Operating Temperature Range (C)|
|IAVDD Supply Current (Typ) (mA)|
|INL (Typ) (ppm)|
|Offset error drift (Typ) (uV/C)|
|PGA Gain (Typ) (V/V)|
|Power/Channel (Typ) (mW)|
|Approx. Price (US$)|
| Daisy-Chainable |
| Int |
|0 to 70|
| NFBGA |
| 1 |
|7.80 | 1ku|