AD7124-4BBCPZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7124-4BBCPZ-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $49.0909 | $49.09 |
| 10 | $35.4545 | $354.55 |
| 100 | $31.3636 | $3,136.36 |
| 500 | $30 | $15,000.00 |
| 1,000 | $28.6364 | $28,636.40 |
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
π Reference alternative (not in catalog)
AD7124-4BBCPZ
π Reference alternative (not in catalog)
AD7124-4BCPZ
π Reference alternative (not in catalog)
AD7124-8BCPZ-RL7
π Reference alternative (not in catalog)
ADS124S08IPBSR
π Reference alternative (not in catalog)
AD7124-4BBCPZ-RL7 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 |
| Sampling Rate (Max) | 19.2 kSPS |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| PGA Gain | 1 to 128 |
| Internal Reference | Precision low drift band gap |
| Power Modes | Low, Mid, Full |
| Typical Current (Low Power Mode) | 350 Β΅A |
| RMS Noise (Gain=128, 25 SPS) | 1.5 Β΅V |
| Package | 32-LFCSP (5x5 mm) |
| Operating Temperature Range | -40Β°C to +105Β°C |
| 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 External reference positive input |
| Pin 8 | REFIN1(-) β External reference negative input |
| Pin 9 | DVDD β Digital power supply |
| Pin 10 | DGND β Digital ground |
| Pin 11 | SCLK β Serial clock input |
| Pin 12 | DIN β Serial data input |
| Pin 13 | DOUT β Serial data output |
| Pin 14 | CS β Chip select |
| Pin 15 | SYNC β Synchronization input |
| Pin 16 | P0 β General-purpose digital I/O |
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, Low Power or Battery-Operated Instrumentation, Thermocouple and RTD Measurements.
Smart Transmitters
The AD7124-4BBCPZ-RL7 is ideal for smart transmitters in industrial process control, where it converts sensor signals (temperature, pressure, flow) with high accuracy. Its low power consumption (350 Β΅A in low power mode) and 24-bit resolution enable precise measurement over 4-20 mA loops. The integrated PGA and reference reduce external components, simplifying design. The device's 50 Hz/60 Hz rejection filter ensures stable readings in noisy industrial environments, and its SPI interface allows easy integration with microcontrollers.
Recommended
Process Control Input Modules
In process control input modules, the AD7124-4BBCPZ-RL7 provides high-resolution conversion of analog signals from sensors like RTDs, thermocouples, and strain gauges. Its programmable gain amplifier (PGA) with gains up to 128 allows direct connection of low-level sensor outputs without external amplification. The device's three power modes let designers balance noise performance against power budget, crucial for multi-channel modules. The integrated reference and digital filter simplify design, while the extended temperature range (-40Β°C to +105Β°C) ensures reliability in harsh industrial environments.
Recommended
Temperature and Pressure Measurement
The AD7124-4BBCPZ-RL7 excels in temperature and pressure measurement systems, offering 24-bit resolution and low noise (1.5 Β΅V RMS at gain 128, 25 SPS). It directly interfaces with thermocouples, RTDs, and pressure sensors, with the PGA amplifying small signals. The internal reference provides a stable voltage for ratiometric measurements, reducing external component count. Its low power consumption makes it suitable for battery-powered field instruments, and the SPI interface allows easy data transfer to a host processor.
Recommended
Weigh Scales and Strain Gauge Sensors
For weigh scales and strain gauge applications, the AD7124-4BBCPZ-RL7 provides the high resolution and low noise required for accurate weight measurement. Its PGA with gains up to 128 amplifies the small differential output of a load cell, while the 24-bit sigma-delta ADC ensures precise conversion. The device's internal reference and 50 Hz/60 Hz rejection filter help reject power line interference, common in industrial settings. The low power modes enable battery-operated portable scales, and the compact 32-LFCSP package fits space-constrained designs.
Recommended
Low Power or Battery-Operated Instrumentation
The AD7124-4BBCPZ-RL7 is designed for low power or battery-operated instrumentation, with a typical current consumption of 350 Β΅A in low power mode. This makes it ideal for portable data loggers, wireless sensors, and handheld meters. The device's three power modes allow designers to optimize power versus noise performance, extending battery life. The integrated signal chain (mux, PGA, ADC, reference) reduces external components, saving board space and power. The SPI interface and wide digital supply range (1.8V to 3.6V) enable direct connection to low-power microcontrollers.
Recommended
Thermocouple and RTD Measurements
The AD7124-4BBCPZ-RL7 is well-suited for thermocouple and RTD measurements, offering high accuracy and low noise. Its PGA amplifies the small voltages from thermocouples, while the internal reference provides a stable voltage for RTD excitation. The device's 24-bit resolution and programmable output data rate allow precise temperature readings. The 50 Hz/60 Hz rejection filter minimizes power line interference, and the extended temperature range ensures reliable operation in industrial environments. The SPI interface simplifies connection to a host processor for cold-junction compensation and linearization.
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 | AD7124-4BBCPZ | AD7124-8BCPZ-RL7 | ADS124S08IPBSR |
|---|---|---|---|---|---|
| Package | 32-LFCSP (5x5 mm) | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same |
| 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 |
| Max Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4 kSPS |
| PGA Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Temperature Range | -40Β°C to +105Β°C | -40Β°C to +85Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +125Β°C |
| Interface | SPI | SPI | SPI | SPI | SPI |
Key Differentiators
- Extended temperature range up to +105Β°C (vs AD7124-4BCPZ-RL7)
- Tape and reel packaging for automated assembly (vs AD7124-4BBCPZ)
- Lower power consumption in low power mode (vs ADS124S08IPBSR)
Design Notes
Provide adequate decoupling on AVDD and DVDD supplies. Place 0.1 Β΅F and 10 Β΅F 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 like the ADP150 for the analog supply to maintain the ADC's noise performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a 10 Β΅F capacitor for the internal reference output (REFOUT) and a 0.1 Β΅F capacitor for the REFIN pins. Keep analog input traces short and shielded to reduce noise pickup. A solid ground plane under the ADC is recommended.
Select the appropriate power mode based on the required noise performance and power budget. Higher power modes offer lower noise but increase current consumption. Ensure the input common-mode voltage is within the specified range for the PGA. Do not exceed the absolute maximum ratings on any pin.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH compliance assumed based on ADI policy.
