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The AD7124-8WBBCPZ device is an 8-channel, low-noise, low-power, 24-bit Σ-Δ ADC that integrates PGA and reference voltage sources.

Instructions

The AD7124-8WBBCPZ is a low-power, low-noise, fully integrated analog front end for high-precision measurement applications. The AD7124-8WBBCPZ Class W is AEC-Q100 certified for automotive applications. The device has a low-noise, 24-bit sigma-δ analog-to-digital converter (ADC) that can be configured to provide 8 differential inputs or 15 single-ended or pseudo-differential inputs. The low on-chip noise level ensures that small signals can be input directly into the ADC.

One of the main advantages of the AD7124-8WBBCPZ is the flexibility to use three integrated power modes. The current power consumption, output data rate range, and RMS noise can all be customized with the selected power mode. The device also offers multiple filter options, ensuring maximum flexibility for the user.

At an output data rate of 25 SPS (single-cycle build), the AD7124-8WBBCPZ can achieve both 50 Hz and 60 Hz rejection, and at lower output data rates, more than 80 dB rejection performance can be achieved.

The AD7124-8WBBCPZ offers the highest signal chain integration. The device incorporates a precision low-noise, low-drift internal bandgap reference voltage source and accepts an external differential reference voltage for internal buffering. Other key integrated features include a programmable low drift excitation current source, open test current control, and a bias voltage generator that sets the common mode voltage of a channel to AVDD/2. The low-end power switch allows the user to switch off the bridge sensor between transitions, ensuring the absolute minimum system power consumption. The device also allows users to work with an internal clock or an external clock.

In addition, the AD7124-8WBBCPZ integrates rich diagnostic capabilities as part of a comprehensive feature portfolio. These diagnostic capabilities include cyclic redundancy check (CRC), signal chain check, and serial interface check to provide a more robust solution. These diagnostic functions reduce the need for external components to perform diagnostic functions, which reduces the need for board space, reduces design time and saves costs. According to IEC 61508, Failure Mode Impact and Diagnostic Analysis (FMEDA) for typical applications indicates a safe failure ratio (SFF) greater than 90%.

The AD7124-8WBBCPZ has the following features:

3 power consumption modes

RMS noise

Low power consumption: 24 nV rms (1.17 SPS), gain =128 (typical 255 μA)

Medium power: 20 nV rms (2.34 SPS), gain =128 (typical 355 μA)

Full power: 23 nV rms (9.4 SPS), gain =128 (typical 930 μA)

Noise-free resolution up to 22 bits (gain =1) in all power modes

Output data rate

Full power: 9.38 SPS to 19,200 SPS

Medium power: 2.34 SPS to 4800 SPS

Low power consumption: 1.17 SPS to 2400 SPS

Rail-to-rail analog input (gain greater than 1)

50 Hz/60 Hz simultaneous rejection (25 SPS, single cycle establishment)

Diagnostic capabilities (for safety Integrity Level (SIL) certification)

Cross point multiple analog inputs

8 differential /15 pseudo-differential inputs

Programmable gain (1 to 128)

Bandgap reference voltage source with a maximum drift of 10 ppm/°C (70 μA)

Programmable matching excitation current

Internal clock oscillator

On-chip bias voltage generator

Low power switch

Universal output

Multiple filter options

Internal temperature sensor

Self-calibration and system calibration

Sensor open circuit detection

Automatic channel timing controller

Each channel is configured independently

Power supply: 2.7 V to 3.6 V and ±1.8 V

Independent interface power supply

Turn-off current: 5μA (Max)

Temperature range: −40°C to +125°C

32-pin LFCSP package

3 - or 4-wire serial interface

SPI, QSPI™, MICROWIRE™ and DSP compatible

Schmidt trigger in SCLK pin

ESD: 4 kV

Passed AEC-Q100 Automotive application certification

Application field

The AD7124-8WBBCPZ is widely used in high precision measurement, industrial control, medical instruments and sensor interfaces. Its high accuracy, low noise and low power consumption make it excellent in applications where accurate data acquisition is required ‌.

Contact us

For [AD7124-8WBBCPZ analog to digital converter] sample or purchase services, you can visit the official website www.hkmjd.com contact Mingjiada Electronics.