Overview
The AD7124-4BBCPZ-RL7, produced by Analog Devices Inc., is a low power, low noise, completely integrated analog front end designed for high precision measurement applications. This device features a 24-bit Σ-Δ analog-to-digital converter (ADC) and can be configured to have four differential inputs or seven single-ended or pseudo differential inputs. The on-chip low gain stage allows signals of small amplitude to be interfaced directly to the ADC. The AD7124-4 offers three integrated power modes, enabling flexibility in current consumption, output data rates, and rms noise. This device is particularly suited for applications requiring high signal chain integration and minimal power consumption.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 24-bit |
| Number of Channels | 4 differential or 7 single-ended/pseudo differential |
| Power Modes | Low, Mid, Full Power |
| Current Consumption (Typical) | 255 µA (Low Power), 355 µA (Mid Power), 930 µA (Full Power) |
| RMS Noise | 24 nV rms at 1.17 SPS (Low Power), 20 nV rms at 2.34 SPS (Mid Power), 23 nV rms at 9.4 SPS (Full Power) |
| Analog Power Supply | 2.7 V to 3.6 V (single supply), 1.8 V (dual supply) |
| Digital Power Supply | 1.65 V to 3.6 V |
| Operating Temperature Range | -40°C to +105°C |
| Package | 32-Lead LFCSP or 24-Lead TSSOP |
Key Features
- Low noise, low power 24-bit Σ-Δ ADC with programmable gain amplifier (PGA) and reference
- Three integrated power modes for flexible current consumption and output data rates
- Simultaneous 50 Hz and 60 Hz rejection with rejection in excess of 80 dB at lower output data rates
- Precision, low noise, low drift internal band gap reference and external differential reference option
- Programmable low drift excitation current sources, burnout currents, and bias voltage generator
- Low-side power switch for minimal power consumption of bridge sensors
- Integrated channel sequencer for sequential conversion of multiple channels
- Extensive diagnostic functionality including CRC, signal chain checks, and serial interface checks
Applications
- High precision measurement applications such as industrial automation, medical devices, and test and measurement equipment
- Defense and aerospace applications (AD7124-4-EP model)
- Applications requiring high signal chain integration and low power consumption
Q & A
- What is the resolution of the AD7124-4 ADC?
The AD7124-4 has a 24-bit resolution.
- How many channels does the AD7124-4 support?
The device supports 4 differential or 7 single-ended/pseudo differential inputs.
- What are the power modes available for the AD7124-4?
The device offers three integrated power modes: Low Power, Mid Power, and Full Power.
- What is the typical current consumption for each power mode?
The typical current consumption is 255 µA (Low Power), 355 µA (Mid Power), and 930 µA (Full Power).
- What is the operating temperature range of the AD7124-4?
The operating temperature range is -40°C to +105°C.
- Can the AD7124-4 reject 50 Hz and 60 Hz noise?
Yes, the device can achieve simultaneous 50 Hz and 60 Hz rejection with rejection in excess of 80 dB at lower output data rates.
- What types of power supplies can the AD7124-4 use?
The device can operate with a single analog power supply from 2.7 V to 3.6 V or a dual 1.8 V power supply, and a digital supply from 1.65 V to 3.6 V.
- Does the AD7124-4 support external clock operation?
Yes, the device allows operation with either an internal clock or an external clock.
- What diagnostic features are integrated into the AD7124-4?
The device includes extensive diagnostic functionality such as CRC, signal chain checks, and serial interface checks.
- What are the package options for the AD7124-4?
The device is available in a 32-Lead LFCSP package or a 24-Lead TSSOP package.
