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Analog Devices Inc. AD7124-8BCPZ-RL7
- Part No.:
- AD7124-8BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7124-8BCPZ-RL7.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,027
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Product details
Overview
AD7124-8BCPZ-RL7 from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, reference, diagnostics, and channel sequencer-designed for high-precision sensor measurement in industrial and automotive systems. It delivers 24 nV rms noise at 1.17 SPS (gain = 128), supports 8 differential or 15 pseudo-differential inputs, operates from −40°C to +125°C, and features AEC-Q100 qualification for automotive use.
For engineers reviewing the AD7124-8BCPZ-RL7 datasheet, AD7124-8BCPZ-RL7 pinout, AD7124-8BCPZ-RL7 application, or AD7124-8BCPZ-RL7 equivalent, key selection criteria include simultaneous 50/60 Hz rejection at 25 SPS, per-channel configuration support, internal 10 ppm/°C drift reference, low-side power switch for bridge sensors, and diagnostic coverage enabling SIL-certifiable designs.
Technical Context
The AD7124-8BCPZ-RL7 integrates a 24-bit Σ-Δ modulator with programmable gain array (1–128), sinc4/sinc3/faster settling digital filters, and crosspoint multiplexed analog input architecture supporting up to 16 configurable channels-including diagnostics. Its on-chip band gap reference (10 ppm/°C max drift) and matched excitation current sources (0.1–1000 µA, ±4% initial tolerance) enable direct RTD, thermocouple, and bridge sensor interfacing without external components.
It implements comprehensive diagnostics including CRC, signal chain checks, reference detect, overvoltage/undervoltage monitoring, LDO supervision, and burnout detection-validated to >90% safe failure fraction (SFF) per IEC 61508. Power management includes three discrete modes (low/mid/full) with corresponding current consumption (255/355/930 µA typical), output data rate ranges (1.17–19.2 kSPS), and RMS noise profiles (24/20/23 nV at gain = 128).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; peak-to-peak resolution up to 18 bits at 1200 SPS (gain = 1) |
| RMS Noise | 24 nV (low power mode, 1.17 SPS, gain = 128) - enables sub-µV-level signal capture |
| Output Data Rate | 1.17–19,200 SPS across three power modes - supports both slow-sampling precision and faster system response |
| INL Error | ±1 ppm of FSR (gain = 12); ±2 ppm (gain > 14) - ensures high linearity for calibration-critical measurements |
| Common-Mode Rejection | 115 dB (gain ≥ 8, DC) - maintains accuracy in noisy industrial environments with common-mode interference |
| Reference Drift | 10 ppm/°C (−40°C to +125°C, B-grade variant) - matches automotive temperature requirements without external trimming |
| Power Supply Range | Analog: 2.7–3.6 V; Digital: 1.65–3.6 V - supports mixed-voltage system integration with independent IOVDD |
Pinout & Package
The AD7124-8BCPZ-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 Current Sink / VBIAS Node | Configurable as differential/pseudo-differential inputs; support excitation current sourcing and bias voltage injection for sensor conditioning |
| REFIN1(±), REFIN2(±) | Differential Reference Inputs | Accept external reference; internally buffered when enabled - allows flexible reference topology with noise immunity |
| AVDD, AVSS, DGND, IOVDD | Power Supply Terminals | Separate analog/digital supplies with independent IOVDD - enables isolation between noisy digital domains and precision analog paths |
| DOUT/RDY, CS, SCLK, DIN | Serial Interface Signals | 3-/4-wire SPI-compatible interface with Schmitt-triggered SCLK - ensures robust communication in electrically harsh environments |
| P1–P4 | General-Purpose Outputs | Programmable logic outputs usable for status indication, sensor control sequencing, or system synchronization |
| PSW | Low-Side Power Switch Control | Drives external NMOS to disconnect bridge sensors between conversions - reduces system power by eliminating idle current draw |
Key Features
| Feature | Design Value |
|---|---|
| Three Configurable Power Modes | Enables trade-off between current (255–930 µA), noise (20–24 nV rms), and data rate (1.17–19.2 kSPS) per application need |
| Simultaneous 50/60 Hz Rejection | Exceeds 80 dB rejection at 25 SPS with single-cycle settling - eliminates need for external notch filtering in AC-line-noise-prone installations |
| Per-Channel Configuration | Eight independent setups (gain, filter, ODR, buffering, reference) assignable per input - simplifies multi-sensor systems with heterogeneous signal types |
| Integrated Diagnostics Suite | Covers signal chain integrity, reference validity, supply monitoring, CRC, and burnout detection - reduces external component count and validation effort for functional safety |
| Matched Excitation Current Sources | 0.1–1000 µA with ±0.5% matching and 5 ppm/°C drift - enables precise ratiometric RTD or load-cell measurements without external current DACs |
| On-Chip Bias Voltage Generator | Provides AVDD/2 common-mode voltage on any AINx pin - eliminates external resistive dividers for bipolar sensor interfaces |
Applications
| Temperature Measurement | Pressure Measurement |
|---|---|
|
Use Scenario: High-accuracy RTD or thermocouple readout in HVAC controllers, battery pack monitors, and engine coolant systems. IC Role / Device Role / Timing Role: Precision front-end ADC with cold-junction compensation, excitation current control, and internal temperature sensor for reference junction correction. Use Value: Achieves ±0.1°C accuracy using 4-wire RTD with on-chip 10 ppm/°C reference and matched 100 µA excitation currents - no external reference or current source required. |
Use Scenario: Industrial pressure transmitters with strain-gauge bridges operating in wide ambient temperature ranges (−40°C to +125°C). IC Role / Device Role / Timing Role: Signal conditioner and digitizer with low-side power switch, programmable gain, and simultaneous 50/60 Hz rejection for factory-floor EMI resilience. Use Value: Enables zero-drift bridge measurement via per-channel offset/gain calibration and PSW-controlled bridge power cycling - extends battery life in wireless field devices. |
| Smart Transmitters | Industrial Process Control |
|
Use Scenario: HART-enabled 4–20 mA smart transmitters requiring SIL-2 compliance and self-diagnostics for valve position or flow sensing. IC Role / Device Role / Timing Role: Safety-certifiable ADC subsystem providing CRC, reference detect, supply monitoring, and memory checksum protection per IEC 61508 FMEDA. Use Value: Delivers >90% safe failure fraction (SFF) with integrated diagnostics - reduces external fault-detection circuitry and accelerates functional safety certification. |
Use Scenario: Distributed I/O modules in PLC backplanes measuring multiple analog process variables (e.g., pH, conductivity, level) simultaneously. IC Role / Device Role / Timing Role: Multi-channel sequencer with automatic channel switching, 16-channel support (including diagnostics), and SPI interface for microcontroller host coordination. Use Value: Reduces host MCU overhead via hardware-based channel sequencing and per-input configuration registers - improves scan cycle determinism in time-critical control loops. |
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 |
|---|---|---|---|
| AD7124-4BCPZ-RL7 | 4-channel version; identical architecture, specs, and package - lacks 4 additional analog inputs and associated mux routing | Suitable for cost-optimized 4-input systems where channel count is constrained; same power, noise, and diagnostic capability | Select when fewer than 8 differential inputs are needed - saves board area and BOM cost without sacrificing precision or safety features |
| ADS1263IPBSR | 24-bit delta-sigma ADC with 10-channel MUX, but no integrated reference or excitation currents; requires external 2.5 V reference and current sources | Better suited for lab-grade instrumentation with external precision references; lacks integrated diagnostics and AEC-Q100 qualification | Choose when maximum flexibility in reference/excitation design is prioritized over integration and automotive qualification - adds external component burden |
Compared with AD7124-8BCPZ-RL7, the AD7124-4BCPZ-RL7 offers identical performance per channel but reduced input count, while the ADS1263IPBSR demands external reference and excitation circuitry - making AD7124-8BCPZ-RL7 optimal for space-constrained, safety-critical, and highly integrated sensor nodes.
Availability
AD7124-8BCPZ-RL7 is available at Aetrix Electronics and suitable for industrial process control, automotive sensor modules, and smart transmitter designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for AD7124-8BCPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7124 family was engineered specifically for high-accuracy, low-power, functionally safe sensor measurement - integrating PGA, reference, diagnostics, and sequencer to replace multi-component front-ends in demanding environmental conditions.
FAQ
What is the maximum output data rate of the AD7124-8BCPZ-RL7 in full power mode?
The AD7124-8BCPZ-RL7 supports a maximum output data rate of 19,200 SPS in full power mode. This mode delivers 23 nV rms noise at gain = 128 and draws 930 µA typical current. The device maintains 24-bit no-missing-codes performance across its entire data rate range, enabling high-speed precision acquisition for dynamic sensor signals without sacrificing resolution.
Does the AD7124-8BCPZ-RL7 include an internal voltage reference, and what is its temperature drift specification?
Yes, the AD7124-8BCPZ-RL7 integrates a precision band gap reference with 10 ppm/°C maximum drift over −40°C to +125°C (B-grade variant, which AD7124-8BCPZ-RL7 implements). It provides a nominal 2.5 V output with ±0.2% initial accuracy and supports buffered operation. This eliminates the need for an external reference in most high-accuracy applications, reducing BOM count and layout complexity.
How many analog input channels does the AD7124-8BCPZ-RL7 support, and what configurations are possible?
The AD7124-8BCPZ-RL7 supports up to 8 fully differential inputs or 15 pseudo-differential inputs via its crosspoint multiplexer. Each channel can be independently configured for gain (1–128), filter type, output data rate, buffering, and reference source. Additionally, up to 16 channels-including diagnostics like power supply checks-can be sequenced automatically, enabling interleaved sensor and health monitoring.
Is the AD7124-8BCPZ-RL7 qualified for automotive applications?
Yes, the AD7124-8BCPZ-RL7 is AEC-Q100 qualified for automotive applications (Grade 1: −40°C to +125°C). Its integrated diagnostics-including CRC, reference detect, supply monitoring, and burnout detection-support functional safety development per IEC 61508, with FMEDA reporting >90% safe failure fraction (SFF). This makes it suitable for engine control, battery management, and ADAS sensor interfaces.
What serial interface protocols does the AD7124-8BCPZ-RL7 support, and does it require external pull-ups?
The AD7124-8BCPZ-RL7 supports standard 3-wire and 4-wire SPI, QSPI™, MICROWIRE™, and DSP-compatible interfaces. Its SCLK input includes an integrated Schmitt trigger for noise immunity. No external pull-up resistors are required on CS, DIN, or DOUT/RDY pins - all digital inputs and outputs meet standard CMOS voltage thresholds across the full IOVDD range (1.65–3.6 V).
AD7124-8BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN 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:
- SPI, DSP
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- 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:
- -
AD7124-8BCPZ-RL7 FAQ
1.How can I place an order for AD7124-8BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7124-8BCPZ-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 AD7124-8BCPZ-RL7 reliable?
The price and inventory of AD7124-8BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7124-8BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7124-8BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7124-8BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7124-8BCPZ-RL7?
AD7124-8BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7124-8BCPZ-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 AD7124-8BCPZ-RL7?
For technical support, including AD7124-8BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7124-8BCPZ-RL7 requirements.
6.How does Aetrix verify that AD7124-8BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7124-8BCPZ-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 AD7124-8BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7124-8BCPZ-RL7?
All AD7124-8BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7124-8BCPZ-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 AD7124-8BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD7124-8BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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