Overview
The AD8233ACBZ-R7, produced by Analog Devices Inc., is an integrated signal conditioning block designed specifically for electrocardiogram (ECG) and other biopotential measurement applications. This component is engineered to extract, amplify, and filter small biopotential signals in noisy environments, such as those caused by motion or remote electrode placement. It is particularly suited for wearable and portable health monitoring devices, offering a compact and low-power solution for heart rate monitoring and other biopotential signal acquisitions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 1.7 | 3.5 | V | |
| Quiescent Supply Current | 50 | μA | ||
| Gain Bandwidth Product (GBP) | 15 | kHz | ||
| Slew Rate (SR) | 0.01 | V/μs | ||
| Voltage Noise Density (RTI) at 1 kHz | 120 | nV/√Hz | ||
| Peak-to-Peak Voltage Noise (RTI) from 0.1 Hz to 10 Hz | 7 | μV p-p | ||
| Common-Mode Rejection Ratio (CMRR) | 80 | dB (dc to 60 Hz) | ||
| Operating Temperature Range | −40 | +85 | °C | |
| Package Dimensions | 2 mm × 1.7 mm |
Key Features
- Fully integrated, single-lead ECG front end
- Low quiescent supply current: 50 μA (typical)
- Leads on/off detection while in shutdown (<1 μA)
- Common-mode rejection ratio: 80 dB (dc to 60 Hz)
- 2-electrode and 3-electrode configurations
- High signal gain (G = 100) with dc blocking capabilities
- 2-pole adjustable high-pass filter
- Accepts up to ±300 mV of half cell potential
- Fast restore feature improves filter settling
- Uncommitted op-amp for creating a 3-pole, low-pass filter
- Integrated RLD amplifier with shutdown
- Single-supply operation: 1.7 V to 3.5 V
- Integrated reference buffer generates virtual ground
- Rail-to-rail output
- Internal RFI filter
- 8 kV HBM ESD rating
- Shutdown pin
Applications
- Portable ECG devices
- Gaming peripherals
- Wearable and remote health monitors
- Fitness and activity heart rate monitors
- Biopotential signal acquisition, such as EMG or EEG
Q & A
- What is the AD8233ACBZ-R7 used for?
The AD8233ACBZ-R7 is used for electrocardiogram (ECG) and other biopotential measurement applications, extracting, amplifying, and filtering small biopotential signals in noisy environments.
- How does the AD8233ACBZ-R7 work?
The AD8233ACBZ-R7 works by using a specialized instrumentation amplifier, an operational amplifier, a right leg drive amplifier, and a mid-supply reference buffer to condition biopotential signals. It also includes features like leads on/off detection and fast restore for quick signal recovery.
- What are the key specifications of the AD8233ACBZ-R7?
The key specifications include a supply voltage range of 1.7 V to 3.5 V, quiescent supply current of 50 μA, gain bandwidth product of 15 kHz, and an operating temperature range of −40°C to +85°C.
- What are the package dimensions of the AD8233ACBZ-R7?
The AD8233ACBZ-R7 is available in a 2 mm × 1.7 mm, 20-ball WLCSP package and a 150 μm thin die for height-constrained applications.
- What is the common-mode rejection ratio (CMRR) of the AD8233ACBZ-R7?
The CMRR is 80 dB from dc to 60 Hz.
- Does the AD8233ACBZ-R7 support multiple electrode configurations?
Yes, it supports both 2-electrode and 3-electrode configurations.
- What is the purpose of the fast restore feature in the AD8233ACBZ-R7?
The fast restore feature reduces the duration of the settling tails of the high-pass filters, allowing the device to recover quickly after an abrupt signal change.
- Can the AD8233ACBZ-R7 be used in wearable devices?
Yes, it is designed for wearable and portable health monitoring devices due to its low power consumption and compact size.
- What types of filters does the AD8233ACBZ-R7 include?
The AD8233ACBZ-R7 includes a 2-pole adjustable high-pass filter and can be configured to create a 3-pole low-pass filter using an uncommitted op-amp.
- Does the AD8233ACBZ-R7 have built-in ESD protection?
Yes, it has an 8 kV HBM ESD rating.
