AD7124-4BBCPZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7124-4BBCPZ-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.55 | $6.55 |
| 10 | $5.95 | $59.50 |
| 100 | $5.35 | $535.00 |
| 500 | $4.75 | $2,375.00 |
| 1,000 | $4.15 | $4,150.00 |
Drop-in alternatives for AD7124-4BBCPZ-RL7 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:
AD7124-4BCPZ-RL7
β Drop-Inπ Reference alternative (not in catalog)
AD7124-4BCPZ
β Drop-Inπ Reference alternative (not in catalog)
AD7124-8BCPZ-RL7
β‘ Same Packageπ Reference alternative (not in catalog)
AD7124-4BBCPZ-RL7 Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Channels | 4 Differential / 7 Single-Ended |
| Input Type | Differential, Single-Ended, Pseudo-Differential |
| Data Interface | SPI |
| Sampling Rate | 19.2 kSPS (max) |
| Architecture | Sigma-Delta |
| Reference Type | External, Internal |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Operating Temperature Range | -40Β°C to +105Β°C |
| Package | 32-LFCSP (5x5 mm) |
| Mounting Type | Surface Mount |
| Power Consumption | 350 Β΅A (low power mode, typical) |
| RMS Noise | 1.5 Β΅V (gain=128, ODR=25 SPS, typical) |
| PGA Gain | 1 to 128 |
| RoHS Status | Compliant |
AD7124-4BBCPZ-RL7 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 Positive reference input 1 |
| Pin 8 | REFIN1- β Negative reference input 1 |
| Pin 9 | REFIN2+ β Positive reference input 2 |
| Pin 10 | REFIN2- β Negative reference input 2 |
| Pin 11 | DVDD β Digital power supply |
| Pin 12 | DGND β Digital ground |
| Pin 13 | SCLK β Serial clock input |
| Pin 14 | DIN β Serial data input |
| Pin 15 | DOUT β Serial data output |
| Pin 16 | CS β Chip select |
| Pin 17 | SYNC β Synchronization input |
| Pin 18 | P0 β General-purpose digital I/O |
| Pin 19 | P1 β General-purpose digital I/O |
| Pin 20 | P2 β General-purpose digital I/O |
| Pin 21 | P3 β General-purpose digital I/O |
| Pin 22 | P4 β General-purpose digital I/O |
| Pin 23 | P5 β General-purpose digital I/O |
| Pin 24 | P6 β General-purpose digital I/O |
| Pin 25 | P7 β General-purpose digital I/O |
| Pin 26 | CLK β Clock input |
| Pin 27 | RESET β Reset input |
| Pin 28 | AVDD β Analog power supply |
| Pin 29 | AIN4 β Analog input 4 |
| Pin 30 | AIN5 β Analog input 5 |
| Pin 31 | AIN6 β Analog input 6 |
| Pin 32 | AVSS β Analog ground |
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
AD7124-4BBCPZ-RL7 is suitable for 6 applications: Smart Transmitters, Process Control Input Modules, Temperature and Pressure Measurement, Weigh Scales and Strain Gauge Sensors, Battery-Powered Instrumentation, IoT and Smart Sensors.
Smart Transmitters
The AD7124-4BBCPZ-RL7 is ideal for smart transmitters used in industrial process control. Its low power consumption (350 Β΅A in low power mode) and high resolution (24-bit) enable accurate measurement of pressure, temperature, and flow. The integrated PGA and reference reduce external components, simplifying design. The device supports 4-20 mA loop-powered transmitters, where its low power is critical. The SPI interface allows easy communication with a microcontroller. The device's noise performance (1.5 Β΅V RMS at gain 128) ensures precise readings in harsh industrial environments.
Recommended
Process Control Input Modules
In process control input modules, the AD7124-4BBCPZ-RL7 provides high accuracy analog-to-digital conversion for multiple sensor inputs. Its 4 differential or 7 single-ended inputs allow connection of various sensors like thermocouples, RTDs, and strain gauges. The programmable gain amplifier (PGA) with gains up to 128 amplifies small sensor signals, while the internal reference ensures stable measurements. The device's 50 Hz/60 Hz rejection filter minimizes power line interference, making it suitable for industrial environments. The SPI interface enables easy integration with PLCs or DCS systems.
Recommended
Temperature and Pressure Measurement
The AD7124-4BBCPZ-RL7 excels in temperature and pressure measurement applications due to its low noise and high resolution. For thermocouple measurements, the device's PGA amplifies the small voltage, and the internal reference provides a stable comparison. For RTD measurements, the device can be configured for ratiometric operation with an external reference. The low power consumption allows battery-powered operation in remote sensors. The device's 24-bit resolution ensures accurate temperature readings with high precision, making it suitable for laboratory and industrial applications.
Recommended
Weigh Scales and Strain Gauge Sensors
The AD7124-4BBCPZ-RL7 is well-suited for weigh scales and strain gauge sensors, where high resolution and low noise are essential. The device's PGA with gains up to 128 amplifies the small output of a load cell, and the 24-bit ADC provides precise digital conversion. The internal reference can be used for ratiometric measurements, eliminating the need for an external reference. The device's low power consumption is beneficial for portable scales. The SPI interface allows easy connection to a microcontroller for display and communication.
Recommended
Battery-Powered Instrumentation
The AD7124-4BBCPZ-RL7 is ideal for battery-powered instrumentation due to its low power consumption of 350 Β΅A in low power mode. It can operate from a 2.7 V supply, making it compatible with lithium batteries. The device's high resolution (24-bit) ensures accurate measurements even with small sensor signals. The integrated PGA and reference reduce external component count, saving board space and power. The SPI interface allows the microcontroller to sleep while the ADC performs conversions, further reducing power consumption. This makes it suitable for portable data loggers and wireless sensors.
Recommended
IoT and Smart Sensors
In IoT and smart sensor applications, the AD7124-4BBCPZ-RL7 provides high-precision analog-to-digital conversion for various sensors, including temperature, humidity, and gas sensors. Its low power consumption is crucial for battery-powered IoT devices. The device's small 32-LFCSP package saves board space, and the SPI interface allows easy integration with wireless microcontrollers. The 24-bit resolution ensures accurate data for cloud analytics. The device's wide operating temperature range (-40Β°C to +105Β°C) makes it suitable for outdoor and industrial IoT deployments.
Recommended
Recommended Products Summary
Engineering reference data for AD7124-4BBCPZ-RL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7124-4BCPZ-RL7 | AD7124-4BCPZ | AD7124-8BCPZ-RL7 |
|---|---|---|---|---|
| Package | 32-LFCSP (5x5 mm) | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 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 |
| Max Output Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS |
| PGA Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Power Consumption (Low Power Mode) | 350 Β΅A (typical) | 350 Β΅A (typical) | 350 Β΅A (typical) | 350 Β΅A (typical) |
| Temperature Range | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C |
Key Differentiators
- Integrated analog front end with PGA and reference (vs ADS1248IPW)
- Low power consumption of 350 Β΅A in low power mode (vs MCP3564-E/ST)
- Multiple power modes for flexibility (vs ADS1248IPW)
Design Notes
The AD7124-4BBCPZ-RL7 requires separate analog (AVDD) and digital (DVDD) supplies. AVDD should be between 2.7V and 3.6V, and DVDD between 1.8V and 3.6V. Use low-noise LDO regulators for AVDD to minimize noise. Decouple each supply pin with a 10Β΅F tantalum capacitor in parallel with a 0.1Β΅F ceramic capacitor placed close to the pins. The reference decoupling capacitor should be placed close to the REFIN pins to ensure stable operation.
For optimal performance, use a solid ground plane and separate analog and digital ground planes if possible. Place the ADC close to the sensor to minimize trace length and noise pickup. Use Kelvin connections for the reference inputs to avoid voltage drops. Keep digital signals away from analog inputs to reduce crosstalk. Follow the layout guidelines in the AD7124-4 datasheet (Rev. E) for best results.
A common pitfall is not properly configuring the power mode. The AD7124-4 has three power modes (low, mid, full) that trade off power consumption vs. noise. In low power mode, the current is 350Β΅A but noise is higher. For high precision measurements, use mid or full power mode. Also, ensure the reference is stable and properly decoupled. Incorrect SPI timing can cause communication errors; follow the timing diagrams in the datasheet.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH compliance assumed based on ADI policy.
