CD24AD99Q 8-Channel, 24-Bit, Analog-to-Digital Converter for EEG and Biopotential Measurements-承芯微-承芯微电子(北京)有限公司

High Precision ADCs

CD24AD99Q

8-Channel, 24-Bit, Analog-to-Digital Converter for EEG and Biopotential Measurements

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CD24AD99Q
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Package：TQFP-64

Stock：997

Package Qty：Tray, 160

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Resolution (Bits):24
Channels:8
Interface type:SPI
Power Consumption:39 mW/span>

Eight Low-Noise PGAs and Eight High-Resolution ADCs
Low Power: 0.75 mW/channel
Input-Referred Noise: 4 μVPP (150 Hz BW, G = 6)
Input Bias Current: 200 pA Data Rate: 250 SPS to 32 kSPS
CMRR: –115 dB
Programmable Gain: 1, 2, 4, 6, 8, 12, or 24
Supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards
Unipolar or Bipolar Supplies:
- AVDD = 2.7 V to 5.25 V
- DVDD = 1.65 V to 3.6 V
Built-In Right Leg Drive Amplifier, Lead-Off Detection, Wilson Center Terminal, Pace Detection, Test Signals
Integrated Respiration Impedance Measurement
Digital Pace Detection Capability
Built-In Oscillator and Reference
SPI™-Compatible Serial Interface

Electroencephalogram (EEG) Study
Fetal Electrocardiography (ECG)
Sleep Study Monitor
Bispectral Index (BIS)
Evoked Audio Potential (EAP)

Description

The CD24AD99Q-4, CD24AD99Q-6, and CD24AD99Q devices are a family of four-, six-, and eight-channel, lownoise, 24-bit, simultaneous-sampling delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The CD24AD99Q-x incorporates all commonly-required features for extracranial electroencephalogram (EEG) and electrocardiography (ECG) applications. With its high levels of integration and exceptional performance, the CD24AD99Q-x enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost. The CD24AD99Q-x has 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 patient bias output signal. Optional SRB pins are available to route a common signal to multiple inputs for a referential montage configuration. The CD24AD99Q-x operates at data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented internal to the device using an excitation current sink or source. Multiple CD24AD99Q-4, CD24AD99Q-6, or CD24AD99Q devices can be cascaded in high channel count systems in a daisy-chain configuration.
The CD24AD99Q-x is offered in a TQFP-64 package specified from –40°C to +85°C.

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