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Analog Devices Inc. AD7124-8BCPZ
- Part No.:
- AD7124-8BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7124-8BCPZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:450
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Product details
Overview
AD7124-8BCPZ from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, reference, excitation currents, and diagnostics-designed for high-precision sensor measurement. 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 is housed in a 32-lead LFCSP package for industrial and automotive temperature/pressure sensing.
For engineers reviewing the AD7124-8BCPZ datasheet, AD7124-8BCPZ pinout, AD7124-8BCPZ application, or AD7124-8BCPZ equivalent, key selection criteria include simultaneous 50/60 Hz rejection at 25 SPS, per-channel configuration support, AEC-Q100 qualification, and integrated diagnostics enabling SIL-certifiable system design.
Technical Context
The AD7124-8BCPZ implements a fully integrated analog front end with a 24-bit Σ-Δ modulator, programmable gain array (1–128), and selectable sinc3/sinc4/fast-settling digital filters. Its crosspoint multiplexer enables flexible channel routing, while the automatic sequencer supports up to 16 configurable channels-including analog inputs and diagnostics like reference detect or power supply monitor.
It integrates dual low-drift excitation current sources (0.1–1000 µA), a bias voltage generator (AVDD/2), low-side power switch (RON = 7–10 Ω), and internal band gap reference (10 ppm/°C drift for B grade). Power modes-low (255 µA), mid (355 µA), and full (930 µA)-directly trade off noise, data rate, and current consumption without external component changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RMS Noise | 24 nV rms @ 1.17 SPS, gain = 128 - enables sub-µV-level resolution in ultra-low-power sensor interfaces |
| Output Data Rate | 1.17–19,200 SPS across three power modes - supports both slow thermocouple reads and faster bridge measurements |
| Input Channels | 8 differential or 15 pseudo-differential - simplifies multi-sensor systems without external MUX or reconfiguration overhead |
| Reference Drift | 10 ppm/°C (B grade) - ensures stable 24-bit accuracy over −40°C to +125°C without external reference |
| Common-Mode Rejection | 115 dB @ DC, gain ≥ 8 - rejects noise from long sensor cables in industrial environments |
| 50/60 Hz Rejection | >120 dB @ 10 SPS (sinc4) - eliminates mains interference in single-cycle settling without notch filter tuning |
| Diagnostic Coverage | CRC, signal chain check, reference detect, burnout detection - achieves >90% safe failure fraction (IEC 61508) |
Pinout & Package
The AD7124-8BCPZ is packaged in a 32-lead, 5 mm × 5 mm, 0.75 mm height LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad. Pin assignments follow the standard Analog Devices LFCSP layout for this family, optimized for low-noise analog routing and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog Input / Excitation Output / VBIAS Source | Configurable pins supporting differential/pseudo-differential acquisition, matched current sourcing, or common-mode bias generation |
| REFIN1(±), REFIN2(±) | Differential Reference Inputs | Accept external reference (0.5–AVDD V); internally buffered to reduce loading and improve PSR |
| DOUT/RDY | Data Output / Ready Indicator | Open-drain RDY asserts when conversion complete; DOUT transmits serial data in SPI-compatible format |
| CS, SCLK, DIN | SPI Interface Control | 3- or 4-wire interface compatible with SPI/QSPI/MICROWIRE/DSP; Schmitt-triggered SCLK tolerates noisy clocks |
| PSW | Low-Side Power Switch Control | Drives external bridge sensors; enables power-down between conversions to minimize system power |
| GPO1–GPO4 | General-Purpose Outputs | Configurable logic outputs for status signaling, LED control, or auxiliary sequencing |
| AVDD, AVSS, DGND, IOVDD | Power Supplies | Separate analog/digital supplies allow isolation; IOVDD supports 1.65–3.6 V for mixed-voltage host interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel configuration | Eight independent setups (gain, filter, ODR, reference, buffering) assignable per input-eliminates register rewrites during channel switching |
| Simultaneous 50/60 Hz rejection | Single-cycle settling at 25 SPS with >80 dB rejection-enables robust operation in globally deployed equipment without firmware adaptation |
| Integrated excitation currents | Matched 0.1–1000 µA sources with ±0.5% matching-removes need for precision external DACs or op-amp current mirrors |
| On-chip diagnostics | Hardware-accelerated CRC, reference detect, supply monitoring, and burnout detection-reduces BOM count and validation effort for functional safety designs |
| Internal clock oscillator | 614.4 kHz ±5% factory-trimmed oscillator-enables fully self-contained operation without external crystal or timing components |
Applications
| Temperature Measurement | Pressure Transmitter |
|---|---|
Use Scenario: High-accuracy RTD or thermocouple readout in industrial PLC modules requiring <±0.1°C error over −40°C to +125°C. IC Role / Device Role / Timing Role: Precision analog front end performing ratiometric measurement, cold-junction compensation, and linearization via on-chip temperature sensor and excitation currents. Use Value: Eliminates external reference, PGA, and calibration circuitry-reducing board area by >30% and enabling single-chip Class A transmitter compliance. | Use Scenario: 4–20 mA smart pressure transmitter with HART interface, operating in hazardous zones with strict power and reliability requirements. IC Role / Device Role / Timing Role: Primary ADC capturing bridge output with programmable gain, simultaneous mains rejection, and diagnostic coverage for SIL-2 certification. Use Value: Integrated low-side switch powers down strain gauge between conversions, cutting average current to <300 µA-extending battery life or enabling loop-powered operation. |
| Flowmeter Signal Chain | Automotive Battery Monitoring |
Use Scenario: Electromagnetic flowmeter with dual-frequency excitation, requiring precise low-noise acquisition of microvolt-level induced voltages. IC Role / Device Role / Timing Role: Low-noise ADC with sinc4 filtering and 24-bit resolution acquiring differential sensor signals while rejecting EMI from pump motors and inverters. Use Value: 120 dB 50/60 Hz rejection at 10 SPS allows direct use in 50 Hz and 60 Hz regions without hardware or firmware adaptation. | Use Scenario: In-vehicle battery cell voltage and temperature monitoring in EV traction battery packs, meeting AEC-Q100 Grade 1 requirements. IC Role / Device Role / Timing Role: Automotive-qualified ADC measuring stacked cell voltages with per-cell gain configuration and built-in diagnostics for ISO 26262 ASIL-B compliance. Use Value: AEC-Q100 W grade qualification, −40°C to +125°C operation, and on-chip reference ensure long-term stability without derating or external compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7124-4BCPZ | 4-channel variant; identical architecture, noise, and features but half the input count and smaller 24-lead LFCSP package | Lower channel density; suitable for space-constrained or cost-sensitive 4-sensor systems | Select when fewer inputs are needed and PCB real estate or BOM cost is prioritized over channel scalability |
| LTC2499CGN#PBF | 24-bit delta-sigma ADC with 16-channel mux; no integrated PGA, reference, or diagnostics; higher typical current (550 µA) | Lacks excitation sources, burnout detection, and SIL-ready diagnostics-requires external support circuitry for sensor interfaces | Choose only if external reference, PGA, and diagnostics are already implemented and higher ODR (>20 kSPS) is required |
Compared with AD7124-4BCPZ, the AD7124-8BCPZ provides double the channel count and full feature parity in the same footprint class, while LTC2499CGN#PBF demands additional components to match basic functionality-making AD7124-8BCPZ the optimal choice for integrated, safety-aware sensor nodes.
Availability
AD7124-8BCPZ is available at Aetrix Electronics and suitable for industrial process control, smart transmitter development, and automotive battery monitoring requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for AD7124-8BCPZ 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 product line delivers highly integrated, low-power, high-accuracy ADCs for sensor signal conditioning-designed specifically to replace discrete front ends in precision measurement systems while enabling functional safety certification.
FAQ
What power supply configurations does the AD7124-8BCPZ support?
The AD7124-8BCPZ supports dual supply operation: analog supply AVDD/AVSS from 2.7 V to 3.6 V (or ±1.8 V), and independent digital I/O supply IOVDD from 1.65 V to 3.6 V. This separation allows interfacing with low-voltage microcontrollers while maintaining full analog performance. The AD7124-8BCPZ also includes internal 1.8 V and 1.9 V LDOs to simplify power tree design in systems where only a single rail is available.
Does the AD7124-8BCPZ support simultaneous 50 Hz and 60 Hz rejection-and at what data rates?
Yes, the AD7124-8BCPZ achieves simultaneous 50 Hz and 60 Hz rejection exceeding 80 dB at 25 SPS with single-cycle settling. At lower output data rates (e.g., 10 SPS), sinc4 filtering delivers >120 dB rejection for both frequencies. This capability is hardware-implemented and requires no firmware tuning-making the AD7124-8BCPZ suitable for global instrumentation deployed across 50 Hz and 60 Hz utility grids without region-specific configuration.
How many independent configurations can be stored and assigned per channel in the AD7124-8BCPZ?
The AD7124-8BCPZ supports eight independent configuration registers, each defining gain, filter type, output data rate, buffering, and reference source. Any of these eight setups can be assigned to individual channels (AIN0–AIN15) via the channel sequencer. This enables mixed-sensor systems-such as a 4-wire RTD, thermocouple, and bridge pressure sensor-to operate with optimal settings per channel without software intervention during acquisition.
Is the AD7124-8BCPZ qualified for automotive applications-and which grade applies?
Yes, the AD7124-8BCPZ W grade is AEC-Q100 qualified for automotive applications (Grade 1: −40°C to +125°C). While the base AD7124-8BCPZ part is rated for the same temperature range, only the W grade carries formal AEC-Q100 certification documentation and test reports. For automotive battery monitoring or chassis control systems requiring functional safety evidence, the W grade variant must be specified-its internal reference drift is 15 ppm/°C (vs. 10 ppm/°C for B grade).
What diagnostic functions are integrated into the AD7124-8BCPZ-and how do they support functional safety?
The AD7124-8BCPZ integrates CRC checksums, signal chain checks, reference detect, power supply monitors (ALDO/DLDO), overvoltage/undervoltage detection, and burnout current diagnostics. These features collectively enable a safe failure fraction >90% per IEC 61508 FMEDA analysis. They eliminate the need for external watchdogs or discrete comparators-reducing system complexity and accelerating SIL-2 or ASIL-B certification for AD7124-8BCPZ-based measurement subsystems.
AD7124-8BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for AD7124-8BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7124-8BCPZ 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 reliable?
The price and inventory of AD7124-8BCPZ 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 is usually 5 days.
3.What payment methods are accepted for AD7124-8BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7124-8BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7124-8BCPZ?
AD7124-8BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7124-8BCPZ 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?
For technical support, including AD7124-8BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7124-8BCPZ requirements.
6.How does Aetrix verify that AD7124-8BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7124-8BCPZ 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 meets industry standards.
7.What is the process for return or replacement of AD7124-8BCPZ?
All AD7124-8BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7124-8BCPZ, 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 part is unused and in its original packaging.
Return procedure for AD7124-8BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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