Building on its ADS1298 analog-front-end (AFE) family, Texas Instruments Inc. has introduced fully integrated AFEs with on-chip respiration impedance measurement .

According to TI, the 24-bit ADS1298R devices simplify the implementation of respiration detection in portable electrocardiogram (ECG) equipment by integrating more than 40 discrete components , reducing component count as much as 97 percent, TI said. They are also power efficient, using up to 95 percent less power than discrete implementations . ADS1298R devices are available in eight-, six-, and four-channel versions.

Key highlights :

• Eight Low-Noise PGAs and Eight High-Resolution ADCs (ADS1298, ADS1298R)
• Low Power: 0.75mW/channel
• Input-Referred Noise: 4µVPP (150Hz BW, G = 6)
• Input Bias Current: 200pA
• Data Rate: 250SPS to 32kSPS
• CMRR: –115dB
• Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
• Unipolar or Bipolar Supplies: AVDD = 2.7V to 5.25V, DVDD = 1.65V to 3.6V
• Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, PACE Detection, Test Signals
• Integrated Respiration Impedance Measurement (ADS1294R/6R/8R only)
• Digital PACE Detection Capability
• Built-In Oscillator and Reference
• Flexible Power-Down, Standby Modes
• SPI-Compatible Serial Interface
• Operating Temperature Range: –40°C to +85°C
• Non-Magnetic BGA Package (ADS1294/6/8 and ADS1194/6/8)

Pricing : 1,000-unit pricing is as follows: eight-channel ADS1298R for $25.95; six-channel ADS1296R for $19.95 and four-channel ADS1294R for $13.95 .

Datasheet : Click here.