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-RL7
β Drop-Inβ In Stock
$7.9545 / Unit
View Datasheet βAD7124-8BRUZ
β Drop-Inπ Reference alternative (not in catalog)
AD7190BRUZ
β Drop-Inβ In Stock
$7.6364 / Unit
View Datasheet βAD7799BRUZ
β Drop-Inβ In Stock
$5.24 / Unit
View Datasheet βAD7124-4BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Channels | 4 Differential or 7 Single-Ended/Pseudo Differential |
| Input Type | Differential, Single-Ended, Pseudo Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Sampling Rate | 19.2 kSPS (Maximum) |
| Programmable Gain | 1 to 128 |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Typical Current Consumption | 1.2 mA (Full Power Mode) |
| Internal Reference Drift | 10 ppm/Β°C (Typical) |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package | 24-Lead TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD7124-4BRUZ Pin Configuration
| Pin 1 | SCLK β Serial Clock Input |
| Pin 2 | DIN β Serial Data Input |
| Pin 3 | DOUT/RDY β Serial Data Output / Ready |
| Pin 4 | CS β Chip Select |
| Pin 5 | DVDD β Digital Supply Voltage |
| Pin 6 | GND β Ground |
| Pin 7 | AVDD β Analog Supply Voltage |
| Pin 8 | REFIN1+ β Positive Reference Input 1 |
| Pin 9 | REFIN1- β Negative Reference Input 1 |
| Pin 10 | REFIN2+ β Positive Reference Input 2 |
| Pin 11 | REFIN2- β Negative Reference Input 2 |
| Pin 12 | AIN0 β Analog Input 0 |
| Pin 13 | AIN1 β Analog Input 1 |
| Pin 14 | AIN2 β Analog Input 2 |
| Pin 15 | AIN3 β Analog Input 3 |
| Pin 16 | AIN4 β Analog Input 4 |
| Pin 17 | AIN5 β Analog Input 5 |
| Pin 18 | AIN6 β Analog Input 6 |
| Pin 19 | VBIAS β Bias Voltage Output |
| Pin 20 | IOUT0 β Excitation Current Output 0 |
| Pin 21 | IOUT1 β Excitation Current Output 1 |
| Pin 22 | P0 β General Purpose Output 0 |
| Pin 23 | P1 β General Purpose Output 1 |
| Pin 24 | SYNC β Synchronization 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 with RTDs, Pressure Measurement with Bridge Sensors, Industrial Process Control, Battery-Powered Portable Instruments, Weigh Scale and Strain Gauge, Data Acquisition Systems.
Temperature Measurement with RTDs
The AD7124-4BRUZ is ideal for RTD temperature measurement due to its integrated excitation current sources and high resolution. It provides 24-bit resolution and programmable gain up to 128, allowing direct connection to RTDs without external amplification. The internal reference with low drift ensures accurate temperature readings over a wide range. The device's low power consumption makes it suitable for battery-powered temperature loggers. With SPI interface, it easily interfaces with microcontrollers for data acquisition and control.
Recommended
Pressure Measurement with Bridge Sensors
The AD7124-4BRUZ is well-suited for pressure measurement using bridge sensors. Its PGA allows direct connection to low-level bridge outputs, and the 24-bit resolution provides high accuracy. The device's low noise performance ensures precise pressure readings even in noisy industrial environments. The integrated reference and excitation current sources simplify the signal chain, reducing external components. The SPI interface enables easy integration with microcontrollers for real-time monitoring and control.
Recommended
Industrial Process Control
In industrial process control, the AD7124-4BRUZ provides high-resolution, low-noise analog-to-digital conversion for monitoring and control loops. Its 24-bit resolution and programmable gain allow accurate measurement of process variables such as temperature, pressure, and flow. The device's low power consumption is beneficial for field instruments powered by loop power. The SPI interface supports isolated communication in noisy environments. The integrated diagnostics, such as open-circuit detection, enhance system reliability.
Recommended
Battery-Powered Portable Instruments
The AD7124-4BRUZ is ideal for battery-powered portable instruments due to its low power consumption of 1.2 mA typical. It operates from a 2.7V to 3.6V supply, making it compatible with single-cell lithium-ion batteries. The device's integrated PGA and reference reduce external component count, saving board space and power. The 24-bit resolution ensures accurate measurements for portable data loggers and handheld meters. The SPI interface allows low-power microcontrollers to interface efficiently.
Recommended
Weigh Scale and Strain Gauge
The AD7124-4BRUZ is well-suited for weigh scale and strain gauge applications. Its high resolution and low noise enable precise weight measurements. The PGA allows direct connection to strain gauge bridges, and the integrated excitation current sources simplify sensor biasing. The device's low drift internal reference ensures stable measurements over temperature. The SPI interface facilitates communication with microcontrollers for display and control. The low power consumption is beneficial for portable scales.
Recommended
Data Acquisition Systems
The AD7124-4BRUZ is a versatile ADC for data acquisition systems, offering 4 differential or 7 single-ended inputs. Its 24-bit resolution and programmable gain allow accurate digitization of various analog signals. The device's low noise and high PSRR make it suitable for precision data acquisition in industrial and laboratory settings. The SPI interface supports high-speed data transfer to microcontrollers or DSPs. The integrated reference and diagnostics reduce external components and enhance system reliability.
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-RL7 | AD7124-4BBCPZ-RL7 | AD7124-8BRUZ | AD7190BRUZ |
|---|---|---|---|---|---|
| Package | 24-Lead TSSOP | 24-Lead TSSOP | 32-Lead LFCSP | 24-Lead TSSOP | 24-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 8 Differential / 15 Single-Ended | 2 Differential / 4 Single-Ended |
| Maximum Output Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4.8 kSPS |
| Programmable Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Typical Current Consumption | 1.2 mA | 1.2 mA | 1.2 mA | 1.2 mA | 6.5 mA |
| Integrated Excitation Current Sources | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Integrated excitation current sources (vs AD7190BRUZ)
- Lower power consumption (vs AD7190BRUZ)
- More input channels (vs AD7190BRUZ)
Design Notes
Ensure proper decoupling of AVDD and DVDD supplies. Place 0.1uF and 10uF capacitors close to the AVDD and DVDD pins. The analog and digital supplies should be separated to minimize noise coupling. Use a low-noise LDO for AVDD to maintain ADC performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a 10uF ceramic capacitor for the internal reference. For external reference, use a low-drift reference and place its decoupling capacitor close to the REFIN pins. Keep analog input traces short and shielded to reduce noise pickup.
Avoid exceeding the absolute maximum ratings for AVDD and DVDD. Ensure the SPI interface is isolated if used in noisy industrial environments. The SYNC pin should be tied to DVDD if not used. Do not leave unused analog inputs floating; connect them to AVDD or GND as appropriate.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
