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Analog Devices Inc. AD7124-8BBCPZ-RL7
- Part No.:
- AD7124-8BBCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7124-8BBCPZ-RL7.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
AD7124-8BBCPZ-RL7 from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, reference, diagnostics, and 8 differential or 15 pseudo-differential inputs. It delivers 24 nV rms noise at 1.17 SPS (gain = 128), supports AEC-Q100 automotive qualification, operates from −40°C to +125°C, and uses a 32-lead LFCSP package for high-precision sensor measurement in constrained environments.
For engineers reviewing the AD7124-8BBCPZ-RL7 datasheet, AD7124-8BBCPZ-RL7 pinout, AD7124-8BBCPZ-RL7 application, or AD7124-8BBCPZ-RL7 equivalent, key selection criteria include simultaneous 50/60 Hz rejection at 25 SPS, per-channel configuration support, internal 10 ppm/°C bandgap reference, programmable excitation currents (0.1–1000 µA), and integrated diagnostics for SIL-certifiable systems.
Technical Context
The AD7124-8BBCPZ-RL7 implements a multi-stage sigma-delta modulator with configurable sinc3/sinc4/faster settling filters, enabling precise rejection of line-frequency interference without external components. Its crosspoint multiplexer allows any analog input pin to serve as AINx, IOUTx, or VBIAS, supporting flexible sensor interfacing including RTDs, thermocouples, and bridge transducers.
Diagnostics include CRC-protected register access, signal chain checks, reference detect, overvoltage/undervoltage monitoring on AIN pins, and LDO supply supervision - all contributing to >90% safe failure fraction (SFF) per IEC 61508. The device supports three power modes with distinct current/noise/data rate trade-offs and includes an internal 614.4 kHz oscillator or external clock input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RMS Noise (Gain = 128) | 24 nV (low power mode, 1.17 SPS): enables sub-microvolt resolution for low-frequency sensor signals |
| Output Data Rate Range | 1.17–19,200 SPS across three power modes: supports both ultra-low-power battery operation and higher-speed process monitoring |
| Simultaneous 50/60 Hz Rejection | ≥80 dB at 25 SPS (single-cycle settling): eliminates need for external notch filters in industrial AC-line environments |
| Internal Reference Drift | 10 ppm/°C (−40°C to +125°C): meets stability requirements for automotive-grade temperature sensing without external reference |
| Excitation Current Accuracy | ±4% initial tolerance, ±0.5% matching between IOUT0/IOUT1: ensures matched current sourcing for 3-/4-wire RTD measurements |
| Power Supply Range | AVDD = 2.7–3.6 V, IOVDD = 1.65–3.6 V: supports dual-supply isolation and mixed-voltage system integration |
| Diagnostic Coverage | Includes CRC, reference detect, AIN over/undervoltage, LDO monitoring, and burnout detection: reduces external safety components for functional safety designs |
Pinout & Package
The AD7124-8BBCPZ-RL7 is housed in a 32-lead, 5 mm × 5 mm, 0.75 mm height LFCSP package with exposed thermal pad (EP). Pin functions are defined per Analog Devices' Rev. F datasheet, Figure 15 (Pin Configuration and Function Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog Input / Excitation Output / Bias Source | Configurable crosspoint inputs accepting differential, pseudo-differential, or single-ended signals; also source excitation currents or VBIAS |
| REFIN1(±), REFIN2(±) | Differential Reference Inputs | Accept external reference (0.5–AVDD V); internally buffered when enabled for improved PSR and CMR |
| DOUT/RDY | Data Output / Ready Indicator | Serial data output with Schmitt-triggered RDY function indicating conversion completion or data ready status |
| CS, SCLK, DIN | 3-/4-Wire SPI Interface | Supports SPI, QSPI™, MICROWIRE™, and DSP-compatible protocols; SCLK includes Schmitt trigger for noise immunity |
| PSW | Low-Side Power Switch Control | Drives external NMOS switch to disconnect bridge sensors between conversions, minimizing system power consumption |
| P1–P4 | General-Purpose Outputs | Configurable digital outputs usable for synchronization, alarm signaling, or GPIO control in sensor nodes |
| REGCAPA, REGCAPD | LDO Decoupling Terminals | Require 10 µF ceramic capacitors to stabilize internal 1.9 V (analog) and 1.8 V (digital) LDOs |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel configuration registers | Eight independent setups (gain, filter, ODR, buffering, reference) assignable per input channel - enables mixed-sensor acquisition without reconfiguration overhead |
| Automatic channel sequencer | Up to 16 channels (analog inputs + diagnostics) can be interleaved - simplifies firmware by offloading timing-critical sequencing to hardware |
| Integrated bias voltage generator (VBIAS) | Provides AVDD/2 common-mode voltage on any AIN pin - eliminates external resistive dividers for pseudo-differential sensor interfaces |
| Matched programmable excitation currents | 0.1–1000 µA with ±0.5% matching between IOUT0/IOUT1 - ensures accurate ratiometric RTD or strain gauge measurements |
| On-chip temperature sensor | ±0.5°C accuracy with 13,584 codes/°C sensitivity - enables cold-junction compensation or system-level thermal monitoring without external IC |
Applications
| Temperature Measurement | Pressure Measurement |
|---|---|
Use Scenario: High-accuracy RTD or thermocouple readout in automotive engine control units or industrial PLC modules. IC Role / Device Role / Timing Role: Primary precision ADC with integrated excitation, bias, and cold-junction compensation - handles full analog front-end signal conditioning. Use Value: Eliminates discrete op-amps, references, and excitation circuits; achieves <100 ppm total error over −40°C to +125°C with internal diagnostics. | Use Scenario: Bridge-based pressure transducer interface in medical infusion pumps or HVAC differential pressure sensors. IC Role / Device Role / Timing Role: Ratiometric ADC with low-side power switch (PSW) and matched excitation - powers bridge only during conversion to minimize self-heating. Use Value: Reduces system power by >50% vs. always-on excitation; 24-bit resolution resolves <0.01% FS pressure changes with 80 dB line-frequency rejection. |
| Industrial Process Control | Smart Transmitters |
Use Scenario: Multi-sensor field transmitter aggregating temperature, flow, and level inputs in hazardous area instrumentation. IC Role / Device Role / Timing Role: Central sensor hub with automatic channel sequencing and per-input configuration - acquires diverse sensor types synchronously. Use Value: Enables single-chip solution for HART-enabled 4–20 mA loop-powered devices; diagnostics meet SIL2 requirements per IEC 61508 FMEDA. | Use Scenario: Wireless battery-powered smart sensor node transmitting calibrated sensor data via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Ultra-low-power ADC subsystem using low-power mode (255 µA typ.) and power-down (≤3 µA) - extends battery life to >10 years. Use Value: Integrates reference, PGA, and diagnostics - avoids 5+ discrete components while maintaining 22 noise-free bits at 1.17 SPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7124-4BRUZ | 4-channel variant in 24-lead TSSOP; identical architecture, specs, and register map - differs only in channel count and package | Suitable where ≤4 analog inputs are required and PCB space or cost constraints favor TSSOP over LFCSP | Select when channel count and package footprint are primary constraints; software compatibility is maintained. |
| ADS1263IPBSR | 32-bit delta-sigma ADC with integrated PGA, reference, and diagnostics; higher resolution but larger 32-lead TQFP package and no AEC-Q100 qualification | Better suited for lab-grade instrumentation requiring >24-bit effective resolution; lacks automotive qualification and lower power modes | Choose for metrology-grade accuracy where automotive qualification and ultra-low power are not required. |
Compared with AD7124-4BRUZ, the AD7124-8BBCPZ-RL7 provides double the input channels and superior thermal performance in LFCSP, while ADS1263IPBSR offers higher resolution at the expense of power efficiency, automotive compliance, and diagnostic coverage - making AD7124-8BBCPZ-RL7 optimal for safety-critical, multi-sensor embedded systems.
Availability
AD7124-8BBCPZ-RL7 is available at Aetrix Electronics and suitable for automotive engine control, industrial process transmitters, and battery-powered smart sensors requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for AD7124-8BBCPZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision technology solutions.
The AD7124 family was designed specifically for high-integrity, low-power, multi-sensor measurement systems - integrating signal conditioning, diagnostics, and configurability to reduce design complexity in safety-critical and resource-constrained applications.
FAQ
What is the maximum output data rate of the AD7124-8BBCPZ-RL7 in full power mode?
The AD7124-8BBCPZ-RL7 supports a maximum output data rate of 19,200 SPS in full power mode. This mode draws 930 µA typical current and delivers 23 nV rms noise at gain = 128. The actual achievable rate depends on selected filter type (sinc3, sinc4, or fast settling), decimation ratio, and whether internal or external clocking is used - all configurable via the on-chip register map.
Does the AD7124-8BBCPZ-RL7 support simultaneous 50 Hz and 60 Hz rejection, and at what data rate?
Yes, the AD7124-8BBCPZ-RL7 achieves simultaneous 50 Hz and 60 Hz rejection exceeding 80 dB at 25 SPS with single-cycle settling. This capability is enabled by its sinc4 or post-filter configurations and does not require external notch filters. At lower output data rates (e.g., 10 SPS), rejection improves to 120 dB, making it ideal for noisy industrial AC environments.
What are the key differences between the AD7124-8BBCPZ-RL7 and the AD7124-8W variant?
The AD7124-8BBCPZ-RL7 is the standard grade with 0.75 mm LFCSP height and 15 ppm/°C internal reference drift. The AD7124-8W is AEC-Q100 qualified but shares the same 0.95 mm package height and 15 ppm/°C drift. The AD7124-8BBCPZ-RL7 is not AEC-Q100 qualified - its qualification status is defined by the "B" suffix per Analog Devices' ordering guide, distinguishing it from W-grade automotive parts.
Can the AD7124-8BBCPZ-RL7 operate with only an internal reference, and what is its accuracy?
Yes, the AD7124-8BBCPZ-RL7 includes an internal 2.5 V bandgap reference with ±0.2% initial accuracy at 25°C and 10 ppm/°C drift over −40°C to +125°C for the B-grade part. It draws 70 µA typical and requires no external components. For highest accuracy, users may enable internal reference buffering to improve PSR and CMR - critical for unregulated supply environments.
How does the AD7124-8BBCPZ-RL7 handle sensor burnout detection?
The AD7124-8BBCPZ-RL7 implements hardware-based sensor burnout detection using dedicated 0.5 µA, 2 µA, or 4 µA current sources applied to buffered analog inputs. When a sensor open-circuits, the resulting voltage shift at the input exceeds threshold limits, triggering the BURNOUT_ERR bit in the error register. This feature operates independently of conversion cycles and requires no firmware polling - enhancing reliability in remote or safety-critical deployments.
AD7124-8BBCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 19.2k
- Number of Inputs:
- 8, 15, 16
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- DSP, MICROWIRE™, QSPI™, and SPI™
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±1.8V, 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- PGA, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-LFCSP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7124-8BBCPZ-RL7 FAQ
1.How can I place an order for AD7124-8BBCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7124-8BBCPZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7124-8BBCPZ-RL7 reliable?
The price and inventory of AD7124-8BBCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7124-8BBCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7124-8BBCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7124-8BBCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7124-8BBCPZ-RL7?
AD7124-8BBCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7124-8BBCPZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7124-8BBCPZ-RL7?
For technical support, including AD7124-8BBCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7124-8BBCPZ-RL7 requirements.
6.How does Aetrix verify that AD7124-8BBCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7124-8BBCPZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7124-8BBCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7124-8BBCPZ-RL7?
All AD7124-8BBCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7124-8BBCPZ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7124-8BBCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD7124-8BBCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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