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Analog Devices Inc. AD4131-4BCPZ-RL7
- Part No.:
- AD4131-4BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD4131-4BCPZ-RL7.pdf
- Description:
- ULTRA-LOW POWER, 4CH SYS 24 BIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
AD4131-4BCPZ-RL7 from Analog Devices is an ultra-low-power, 16-bit sigma-delta ADC with integrated PGA, rail-to-rail analog input, and on-chip reference. It delivers 25 nV rms noise at 1.17 SPS (gain = 128), operates from 1.71 V to 3.6 V single supply, supports 4 differential or 8 pseudodifferential inputs, and targets battery-powered precision sensor measurement in smart transmitters and wearables.
For engineers reviewing the AD4131-4BCPZ-RL7 datasheet, AD4131-4BCPZ-RL7 pinout, AD4131-4BCPZ-RL7 application, or AD4131-4BCPZ-RL7 equivalent, key selection criteria include its 32 µA continuous conversion current, 16 noise-free bits at gain = 1, simultaneous 50/60 Hz rejection, programmable excitation currents for RTDs, and low-side power switch for bridge transducers.
Technical Context
The AD4131-4BCPZ-RL7 integrates a fully configurable analog front end including a crosspoint multiplexer, PGA (gain 1–128), sinc3/sinc4 digital filters, and flexible sequencer supporting up to 16 preconfigured channels. Its internal 76.8 kHz oscillator enables autonomous operation without external timing components.
It implements system-level power savings via duty cycling (1/4 or 1/16 ratio), standby (0.5 µA) and power-down (0.1 µA) modes, matched excitation currents (100 nA–200 µA), and diagnostics including burnout detection, reference monitoring, and CRC-protected SPI communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit sigma-delta ADC with no missing codes; supports up to 16 noise-free bits at gain = 1. |
| Output Data Rate | 1.17 SPS to 2.4 kSPS - enables high-resolution low-bandwidth measurements such as temperature and pressure sensing. |
| RMS Noise | 25 nV rms at 1.17 SPS (gain = 128) - ensures sub-microvolt resolution for thermocouple and RTD applications. |
| Supply Current | 32 µA typical in continuous conversion mode (gain = 128) - extends battery life in wireless sensor nodes. |
| Reference Drift | 15 ppm/°C max (band gap) - maintains accuracy across −40°C to +125°C industrial temperature range. |
| Input Configuration | 4 differential or 8 pseudodifferential inputs via crosspoint multiplexer - simplifies multi-sensor interfacing without external switching. |
| Excitation Currents | 100 nA to 200 µA, matched ±0.5% - enables precise 2-/3-/4-wire RTD measurements with minimal self-heating error. |
Pinout & Package
AD4131-4BCPZ-RL7 is housed in a 32-lead, 5 mm × 5 mm LFCSP package with exposed thermal pad. This RoHS-compliant, moisture-sensitive level 3 package supports reflow soldering and provides low thermal resistance for stable performance in compact industrial designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog supply input | 1.71 V to 3.6 V single supply; powers analog core, PGA, and reference - enables operation down to near-dead battery voltage. |
| IOVDD | Digital I/O supply | 1.65 V to 3.6 V independent supply - allows logic-level compatibility with diverse microcontrollers. |
| REFIN1(+), REFIN1(−) | Differential reference input | Accepts external 0.5 V to AVDD–AVSS reference; internal buffers optional - supports ratiometric or absolute measurements. |
| AIN0–AIN7 | Analog input terminals | Support differential/pseudodifferential configurations via crosspoint mux; accept excitation currents and bias voltages - enables direct connection to RTDs, thermocouples, and bridges. |
| P0–P2 | General-purpose outputs | Configurable digital outputs driven by sequencer or register writes - used for sensor enable control or status signaling. |
| SCLK, DIN, DOUT, CS | 4-wire SPI interface | 5 MHz max clock rate; supports CRC and read-after-write verification - ensures robust communication in noisy industrial environments. |
| PDSW | Low-side power switch | 15 Ω typical RON, 30 mA continuous - powers down bridge sensors between conversions to eliminate idle current draw. |
| IEXC0, IEXC1 | Programmable excitation current sources | 100 nA–200 µA, ±1% initial tolerance - eliminates need for external current sources in RTD circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power duty cycling | Reduces average current to 2.5 µA (1/16 ratio), enabling multi-year battery life in wireless sensor nodes. |
| Integrated bias and excitation | VBIAS generator (AVDD/2) and matched IEXC sources eliminate 4+ external components in thermocouple/RTD signal chains. |
| Simultaneous 50/60 Hz rejection | 115 dB rejection at line frequency using sinc3 + post-filter options - removes mains interference without software averaging. |
| On-chip diagnostics | Includes open-wire detection (burnout), reference monitoring, overvoltage/undervoltage alerts, and CRC-protected SPI - reduces firmware validation effort in safety-critical systems. |
| Flexible channel sequencer | 16-channel sequence with per-channel gain, filter, ODR, and excitation settings - enables autonomous multi-sensor polling without host intervention. |
Applications
| Smart Transmitters | Wireless Sensor Nodes |
|---|---|
Use Scenario: 4–20 mA loop-powered field transmitter measuring temperature and pressure in hazardous industrial zones. IC Role / Device Role / Timing Role: Primary ADC and analog front end - digitizes conditioned sensor outputs, manages excitation, and performs self-calibration before transmitting data. Use Value: 32 µA operating current and −40°C to +125°C rating ensure reliable operation under extreme ambient conditions with minimal thermal drift. | Use Scenario: Battery-operated environmental monitor harvesting energy from solar or vibration sources. IC Role / Device Role / Timing Role: Low-power measurement engine - samples thermistor, humidity, and CO₂ sensors in duty-cycled bursts synchronized to energy availability. Use Value: 0.1 µA power-down mode and 1/16 duty cycle reduce average current to <5 µA, extending operational lifetime beyond 10 years on a single coin cell. |
| Portable Healthcare | Bridge-Based Pressure Sensing |
Use Scenario: Wearable ECG and skin temperature patch requiring clinical-grade accuracy and FDA-compliant diagnostics. IC Role / Device Role / Timing Role: Precision analog acquisition subsystem - digitizes biopotential signals with programmable gain and performs real-time open-electrode detection. Use Value: Integrated burnout current and reference monitoring satisfy IEC 62304 diagnostic coverage requirements without additional circuitry. | Use Scenario: Industrial pressure transducer using Wheatstone bridge with millivolt output. IC Role / Device Role / Timing Role: Bridge interface and digitization IC - supplies excitation, applies PGA gain, rejects common-mode noise, and delivers calibrated digital output. Use Value: PDSW switch and matched excitation currents eliminate offset drift from bridge self-heating, improving long-term stability by >50% vs discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7124-4BRUZ | Pin-compatible LFCSP variant; higher 38 µA typical current; no duty cycling mode; same 4-diff/8-SE input structure. | Targeted at fixed-power industrial PLCs rather than battery-constrained edge nodes. | Select when legacy AD7124-4 design reuse is required and ultra-low-power operation is not critical. |
| ADS1220IPWR | Lower integration: no internal reference, no excitation currents, no VBIAS, no PDSW; 1.8 µA standby but 350 µA active current. | Suited for cost-sensitive, lower-accuracy applications where external support circuitry is acceptable. | Choose only if system already includes precision reference and excitation sources, and power budget allows >10× higher active current. |
Compared with AD7124-4BRUZ, AD4131-4BCPZ-RL7 offers 16% lower active current and unique duty cycling for battery longevity; versus ADS1220IPWR, it delivers full sensor-AFE integration - reducing BOM count by ≥7 components while maintaining 16-bit precision and diagnostic coverage.
Availability
AD4131-4BCPZ-RL7 is available at Aetrix Electronics and suitable for smart transmitters, wireless battery-powered sensor nodes, and portable healthcare devices requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for AD4131-4BCPZ-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 since 1965.
The AD4131 family is designed specifically for ultra-low-power, high-precision sensor measurement in battery- and energy-harvesting–powered systems - integrating all essential AFE functions into a single chip to minimize size, power, and development time.
FAQ
What is the maximum operating temperature for AD4131-4BCPZ-RL7?
The AD4131-4BCPZ-RL7 is rated for operation from −40°C to +125°C when packaged in the 32-lead LFCSP (as indicated by the -BCPZ suffix). This extended temperature range supports deployment in harsh industrial and automotive under-hood environments where thermal stability is critical. The device maintains specified INL, gain error drift, and reference accuracy across this full range.
Does AD4131-4BCPZ-RL7 support external reference inputs?
Yes, AD4131-4BCPZ-RL7 supports differential external reference inputs on REFIN1(+) and REFIN1(−) pins, accepting voltages from 0.5 V to AVDD–AVSS. Reference buffers can be enabled per channel to improve noise immunity and drive capability. When using an external reference, the internal 2.5 V or 1.25 V reference is disabled automatically.
How does the duty cycling mode reduce power consumption in AD4131-4BCPZ-RL7?
AD4131-4BCPZ-RL7's duty cycling mode reduces average current by periodically entering low-power standby (0.5 µA) between active conversion periods. With DUTY_CYC_RATIO = 1/16, the device is active only 6.25% of the time - lowering typical average current from 32 µA to ~2.5 µA. The sequencer and internal oscillator remain functional to maintain timing autonomy.
Can AD4131-4BCPZ-RL7 directly interface with 4-wire RTDs?
Yes, AD4131-4BCPZ-RL7 supports direct 4-wire RTD interfacing using its matched IEXC0/IEXC1 current sources (100 nA–200 µA) and dedicated AIN pins. The crosspoint multiplexer allows separate excitation and sense paths, eliminating lead resistance errors. Internal temperature compensation and system calibration further improve absolute accuracy to ±0.1°C over −40°C to +85°C.
Is AD4131-4BCPZ-RL7 pin-compatible with any other Analog Devices ADCs?
Yes, AD4131-4BCPZ-RL7 in the 32-lead LFCSP package is pin-compatible with AD7124-4 in the same LFCSP variant (e.g., AD7124-4BCPZ). This allows drop-in replacement in existing layouts where enhanced ultra-low-power operation and duty cycling are desired - though firmware updates may be needed to configure new features like PDSW control or sequencer-based diagnostics.
AD4131-4BCPZ-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:
- 16
- Sampling Rate (Per Second):
- 2.4k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- 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:
- 1.71V ~ 3.6V
- Voltage - Supply, Digital:
- 1.71V ~ 3.6V
- Features:
- PGA, Simultaneous Sampling, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-LFCSP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4131-4BCPZ-RL7 FAQ
1.How can I place an order for AD4131-4BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4131-4BCPZ-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 AD4131-4BCPZ-RL7 reliable?
The price and inventory of AD4131-4BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4131-4BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4131-4BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4131-4BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4131-4BCPZ-RL7?
AD4131-4BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4131-4BCPZ-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 AD4131-4BCPZ-RL7?
For technical support, including AD4131-4BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4131-4BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4131-4BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4131-4BCPZ-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 AD4131-4BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4131-4BCPZ-RL7?
All AD4131-4BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4131-4BCPZ-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 AD4131-4BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4131-4BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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