AD7124-4BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7124-4BRUZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.75 | $8.75 |
| 10 | $7.95 | $79.50 |
| 100 | $7.15 | $715.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $6.55 | $6,550.00 |
Drop-in alternatives for AD7124-4BRUZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7124-4BRUZ-RL
β Drop-Inβ In Stock
$7.48 / Unit
View Datasheet βAD7124-8BRUZ
β‘ Same Packageπ Reference alternative (not in catalog)
ADS1248IPW
β‘ Same Packageπ Reference alternative (not in catalog)
AD7124-4BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Channels | 4 Differential or 7 Single-Ended |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| Sampling Rate | 19.2 kSPS |
| Architecture | Sigma-Delta |
| Reference Type | Internal, External |
| Voltage - Supply, Analog | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | 1.8V ~ 3.6V |
| Operating Temperature | -40Β°C ~ +125Β°C |
| Package / Case | 24-TSSOP |
| Supplier Device Package | 24-TSSOP |
| Mounting Type | Surface Mount |
| Number of Bits | 24 |
| Number of Inputs | 4, 7 |
| Ratio - S/H:ADC | 0:1 |
| Number of A/D Converters | 1 |
| Features | PGA, Temperature Sensor |
| RoHS Status | Compliant |
AD7124-4BRUZ Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AIN0 β Analog input 0 |
| Pin 3 | AIN1 β Analog input 1 |
| Pin 4 | AIN2 β Analog input 2 |
| Pin 5 | AIN3 β Analog input 3 |
| Pin 6 | AVSS β Analog ground |
| Pin 7 | REFIN1(+) β External reference positive input |
| Pin 8 | REFIN1(-) β External reference negative input |
| Pin 9 | REFIN2(+) β External reference positive input 2 |
| Pin 10 | REFIN2(-) β External reference negative input 2 |
| Pin 11 | IOUT0 β Excitation current output 0 |
| Pin 12 | IOUT1 β Excitation current output 1 |
| Pin 13 | DGND β Digital ground |
| Pin 14 | DVDD β Digital power supply |
| Pin 15 | SCLK β Serial clock input |
| Pin 16 | DIN β Serial data input |
| Pin 17 | DOUT/RDY β Serial data output / ready |
| Pin 18 | CS β Chip select |
| Pin 19 | SYNC β Synchronization input |
| Pin 20 | P0 β General purpose I/O |
| Pin 21 | P1 β General purpose I/O |
| Pin 22 | P2 β General purpose I/O |
| Pin 23 | P3 β General purpose I/O |
| Pin 24 | CLK β Clock input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7124-4BRUZ is suitable for 6 applications: Temperature Measurement, Pressure Measurement, Industrial Process Control, Battery-Powered Instruments, Weigh Scale, Data Acquisition Systems.
Temperature Measurement
The AD7124-4BRUZ is ideal for temperature measurement using RTDs and thermocouples. Its integrated excitation current sources provide the necessary bias for RTDs, while the PGA amplifies low-level thermocouple signals. The 24-bit resolution and low noise ensure accurate temperature readings over a wide range. The device's low power consumption makes it suitable for battery-powered temperature loggers. With a programmable gain up to 128, it can directly interface with various sensor types without external amplification. The internal reference with low drift ensures stable measurements over temperature, reducing the need for external reference components.
Recommended
Pressure Measurement
The AD7124-4BRUZ is well-suited for pressure measurement with bridge sensors, such as strain gauge and piezoresistive pressure sensors. The PGA provides high gain to amplify the small differential output of bridge sensors, while the 24-bit resolution captures fine pressure variations. The device's low noise performance is critical for high-precision pressure sensing in industrial and medical applications. The integrated reference and excitation current sources simplify the sensor interface, reducing external component count. The SPI interface allows easy connection to microcontrollers for data processing and display.
Recommended
Industrial Process Control
In industrial process control, the AD7124-4BRUZ provides high-accuracy analog-to-digital conversion for monitoring and control loops. Its multiple input channels allow connection of various sensors, such as temperature, pressure, and flow, to a single ADC. The device's robust design includes diagnostic features like open-circuit detection and overvoltage monitoring, enhancing system reliability. The low power consumption is beneficial for field instruments powered by loop power. The SPI interface enables isolated communication in noisy industrial environments. The wide operating temperature range of -40Β°C to +125Β°C ensures reliable operation in harsh conditions.
Recommended
Battery-Powered Instruments
The AD7124-4BRUZ is designed for low power consumption, making it ideal for battery-powered instruments such as portable data loggers and handheld meters. It operates from a 2.7V to 3.6V supply and has a typical current consumption of 1.2 mA in full power mode, with lower power modes available. The integrated PGA and reference reduce external components, saving board space and power. The device can be put into standby mode to extend battery life. Its high resolution and low noise ensure accurate measurements even with small sensor signals, making it suitable for precision portable instruments.
Recommended
Weigh Scale
The AD7124-4BRUZ is an excellent choice for weigh scale applications, where high resolution and low noise are essential for accurate weight measurement. The device's 24-bit resolution and PGA allow direct connection to load cells, which produce small differential signals. The integrated reference and excitation current sources simplify the load cell interface. The low power consumption is beneficial for battery-operated scales. The device's diagnostic features, such as open-circuit detection, help ensure reliable operation. The SPI interface allows easy calibration and data readout by a microcontroller.
Recommended
Data Acquisition Systems
The AD7124-4BRUZ is a versatile ADC for data acquisition systems, offering multiple input channels and high resolution. It can be configured for differential or single-ended inputs, making it suitable for a wide range of sensors. The device's low noise and high accuracy ensure reliable data capture in test and measurement equipment. The SPI interface allows easy integration with FPGAs or microcontrollers for high-speed data streaming. The internal reference and PGA reduce external component count, simplifying system design. The device's low power consumption is advantageous for portable data acquisition systems.
Recommended
Recommended Products Summary
Engineering reference data for AD7124-4BRUZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7124-4BRUZ-RL | AD7124-4BCPZ | AD7124-8BRUZ | ADS1248IPW |
|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 32-LFCSP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Inputs | 4 Differential or 7 Single-Ended | 4 Differential or 7 Single-Ended | 4 Differential or 7 Single-Ended | 8 Differential or 15 Single-Ended | 8 Differential or 15 Single-Ended |
| Sampling Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 2 kSPS |
| Interface | SPI | SPI | SPI | SPI | SPI |
| Supply Voltage (Analog) | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 5.25V |
| Operating Temperature | -40Β°C ~ +125Β°C | -40Β°C ~ +125Β°C | -40Β°C ~ +125Β°C | -40Β°C ~ +125Β°C | -40Β°C ~ +105Β°C |
Key Differentiators
- Integrated PGA with gains up to 128 (vs ADS1248IPW)
- Low power consumption (vs ADS1248IPW)
- Internal reference with low drift (vs MCP3564-E/ST)
Design Notes
Decouple the AVDD and DVDD pins with 10uF and 0.1uF capacitors placed as close to the pins as possible. Use separate analog and digital ground planes to minimize noise coupling. The AD7124-4 operates from 2.7V to 3.6V analog supply and 1.8V to 3.6V digital supply; ensure both supplies are within these ranges for proper operation.
For optimal noise performance, place the reference decoupling capacitor (0.1uF) close to the REFIN pins. Use a star-ground topology for the analog ground to avoid digital noise. Keep the SPI lines away from analog inputs to prevent crosstalk. Refer to the AD7124-4 hardware guide for recommended layout.
Ensure the input common-mode voltage is within the specified range to avoid incorrect readings. The PGA gain setting must be configured correctly for the sensor output level. Do not exceed the absolute maximum ratings on any pin. Use the internal reference for moderate accuracy, but for high-precision applications, use an external reference with low drift.
Compliance Information
RoHS compliant per distributor listings. AEC-Q100 not applicable for this industrial ADC.