TI ADS1299-4PAG

The ADS1299-4, ADS1299-6, and ADS1299 are a family of 4-channel, 6-channel, and 8-channel low-noise, 24-bit simultaneous sampling Δ-Σ ADCs. The family integrates a PGA, internal reference, and on-board oscillator. The ADS1299-x incorporates all the features commonly required in extracranial EEG and ECG applications. With high integration and excellent performance, the ADS1299-x enables scalable medical instrumentation systems with significantly reduced size, power consumption, and overall cost. Each channel of the ADS1299-x features a flexible input multiplexer that can be independently connected to internally generated signals for test, temperature, and lead-off detection. Any configuration of input channels can be selected to generate the patient bias output signal. Optional SRB pins are provided to route a common signal to multiple inputs in a referential montage configuration. The ADS1299-x operates at data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented on-chip via excitation current sinks/sources. Multiple ADS1299-4, ADS1299-6, or ADS1299 devices can be daisy-chained in systems requiring more channels. The ADS1299-x is offered in a TQFP-64 package and operates over a temperature range of -40°C to +85°C.

• Up to 8 low-noise PGAs and 8 high-resolution simultaneous-sampling ADCs
• Input-referred noise: 1 μVPP (bandwidth 70Hz)
• Input bias current: 300 pA
• Data rate: 250 SPS to 16 kSPS
• CMRR: -110dB
• Programmable gain: 1, 2, 4, 6, 8, 12, or 24
• Unipolar or bipolar supply: Analog: 4.75V to 5.25V; Digital: 1.8V to 3.6V
• Integrated bias drive amplifier
• Continuous lead-off detection, test signal
• Built-in oscillator
• Internal or external reference
• Flexible power-down and standby modes
• Pin-compatible with ADS129x
• SPI-compatible serial interface
• Operating temperature range: -40°C to +85°C

• Medical devices, including:
• Electroencephalogram (EEG) research
• Fetal ECG
• Sleep study monitors
• Bispectral Index (BIS)
• Evoked Audio Potential (EAP)