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Analog Devices Inc. AD4112BCPZ
- Part No.:
- AD4112BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD4112BCPZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 40LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
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Product details
Overview
AD4112BCPZ from Analog Devices is a 24-bit sigma-delta ADC with integrated analog front end for industrial process monitoring, supporting ±10 V voltage inputs (4 differential or 8 single-ended) and 0 mA to 20 mA current inputs (4 single-ended), 1.25 SPS to 31.25 kSPS output rate, ±0.06% voltage accuracy at 25°C, and housed in a 40-lead 6 mm × 6 mm LFCSP package.
For engineers reviewing the AD4112BCPZ datasheet, AD4112BCPZ pinout, AD4112BCPZ application, or AD4112BCPZ equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready availability details for PLC, DCS, and precision instrumentation design.
Technical Context
The AD4112BCPZ integrates a proprietary iPassives™-based analog front end with dual-input path architecture: high-impedance (≥1 MΩ) ±10 V voltage channels and low-impedance (60 Ω) 0 mA to 20 mA current channels, each configurable independently via eight channel setup registers. Its Sinc5 + Sinc1 digital filter enables simultaneous 50 Hz/60 Hz rejection at 27.27 SPS.
It features an embedded 2.5 V reference (±0.12% initial accuracy, ±5 ppm/°C drift), internal or external clock support (2 MHz internal or 14–16.384 MHz crystal), and operates from AVDD = 3.0 V–5.5 V and IOVDD = 2 V–5.5 V with total IDD = 3.9 mA in full operating mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; delivers 16 noise-free bits at 1 kSPS per channel for stable low-noise measurement. |
| Input Ranges | ±10 V (voltage, ≥1 MΩ input impedance); 0 mA to 20 mA (current, 60 Ω sense impedance). |
| Accuracy | ±0.06% FS voltage error and ±0.08% FS current error at 25°C - enables direct replacement of legacy 16-bit systems without recalibration. |
| Rejection | 85 dB 50/60 Hz rejection at 20 SPS; 120 dB common-mode rejection at DC - critical for noisy industrial environments. |
| Output Rate | 1.25 SPS to 31.25 kSPS; 6.21 kSPS channel scan rate (161 µs settling) - supports fast multi-channel scanning in modular I/O systems. |
| Reference | On-chip 2.5 V band gap reference (±0.12% accuracy, ±5 ppm/°C drift) - eliminates external reference component and layout complexity. |
| Power | Total IDD = 3.9 mA at full operation; 120 µA standby - suitable for low-power isolated field transmitters and battery-backed modules. |
Pinout & Package
The AD4112BCPZ is housed in a 40-lead, 6 mm × 6 mm lead-frame chip-scale package (LFCSP) with exposed thermal pad soldered to AVSS for mechanical stability and heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN7 | Voltage input terminals | Support 8 single-ended or 4 differential ±10 V inputs referenced to VINCOM; high-Z input enables direct connection to industrial sensors without buffering. |
| IIN0+–IIN3+ | Current input sourcing terminals | Accept 0 mA to 20 mA loop currents; absolute input range −0.5 mA to +24 mA allows safe margin for transient overloads. |
| IIN0−–IIN3− | Current return terminals | Each tied to AVSS; 60 Ω input impedance matches standard 250 Ω shunt for 4–20 mA conversion. |
| REF+, REF− | Reference input pins | Accept external 1 V–AVDD reference; internal 2.5 V reference buffered on REFOUT eliminates need for external buffer op amp. |
| DOUT/RDY | Serial data output / data ready indicator | Dual-function pin: outputs conversion data on SCLK falling edge, or asserts active-low interrupt when new data is ready - simplifies host MCU polling/interrupt handling. |
| GPO0, GPO1 | General-purpose outputs | Configurable logic outputs referenced to AVDD/AVSS; usable for status signaling, LED control, or sequencer synchronization in multi-ADC systems. |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-x certified robustness | Tested to IEC61000-4-2 (ESD), -4-3 (RS), -4-4 (EFT), -4-5 (Surge), -4-6 (CS), and CISPR 11 - ensures reliable operation in electrically harsh factory floors. |
| Independent channel configuration | Eight dedicated setup registers allow per-channel gain, filter, reference, and input type selection - eliminates firmware overhead in mixed-signal DCS modules. |
| Simultaneous 50/60 Hz rejection | Sinc5+Sinc1 filter achieves >85 dB rejection at both line frequencies simultaneously at 27.27 SPS - removes dual-frequency interference without software post-processing. |
| Factory-calibrated accuracy | Zero- and full-scale calibration performed at wafer level; achieves ±0.06% TUE voltage error and ±0.08% TUE current error without system-level calibration. |
| Galvanic isolation readiness | Single-supply operation (AVDD only), separate IOVDD domain, and AVSS-referenced analog inputs simplify isolation barrier design for 4–20 mA loop-powered systems. |
Applications
| Process Control Transmitter | PLC Analog Input Module |
|---|---|
Use Scenario: Converting 4–20 mA sensor signals from pressure, temperature, and flow transmitters into digital values for local control or upstream SCADA. IC Role / Device Role / Timing Role: Primary ADC with integrated current input front end and programmable digital filtering; handles up to four independent 4–20 mA loops with automatic channel sequencing. Use Value: Eliminates external shunt resistors, op amps, and reference ICs - reduces BOM count by ≥5 components per channel while maintaining ±0.08% current measurement accuracy across −40°C to +105°C. | Use Scenario: High-density analog input card in modular PLC chassis accepting mixed ±10 V and 0–20 mA field signals from multiple sensors. IC Role / Device Role / Timing Role: Multi-channel sigma-delta ADC with per-channel configuration and 6.21 kSPS aggregate scan rate; synchronized via SYNC pin across multiple AD4112BCPZ devices. Use Value: Enables 8-channel single-ended voltage or 4-channel current acquisition per IC with <161 µs per-channel settling - meets sub-millisecond update requirements for closed-loop motion control. |
| Industrial Data Logger | Calibration & Test Equipment |
Use Scenario: Battery-powered portable logger capturing slow-varying thermocouple, RTD, or strain gauge outputs in remote locations. IC Role / Device Role / Timing Role: Low-power 24-bit ADC with 1.25 SPS minimum output rate and 120 µA standby current; internal reference and flexible power domains reduce external supply complexity. Use Value: Delivers 16 noise-free bits at 1 kSPS while consuming <4 mA total - extends battery life beyond 1 year in intermittent logging applications without sacrificing resolution. | Use Scenario: Benchtop calibrator verifying transmitter accuracy across full 4–20 mA and ±10 V ranges with traceable metrology-grade performance. IC Role / Device Role / Timing Role: Precision measurement engine with ±0.06% voltage and ±0.08% current accuracy, on-chip 2.5 V reference (±5 ppm/°C), and internal temperature sensor for self-compensation. Use Value: Achieves metrology-grade linearity (±0.01% INL) and drift stability without external ovenized references - reduces calibration lab equipment footprint and cost. |
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 |
|---|---|---|---|
| AD7172-2BRUZ | 32-bit resolution, higher power (7.5 mA), 40-lead TSSOP (not LFCSP), no integrated current inputs | Requires external current-to-voltage circuitry; better suited for ultra-high-resolution voltage-only applications like weigh scales | Select AD7172-2BRUZ only when 32-bit resolution and lower noise density (<100 nV/√Hz) outweigh added BOM and layout complexity. |
| ADS1262IPW | 24-bit, integrated PGA (up to 128×), 3.3 V only IOVDD, 28-pin TSSOP, no IEC-certified EMC hardening | Lacks built-in 0–20 mA input path and fails IEC61000-4-x testing - requires external protection circuitry for industrial deployment | Choose ADS1262IPW for cost-sensitive, non-critical voltage measurement where board space is constrained and EMC robustness is secondary. |
Compared with AD7172-2BRUZ and ADS1262IPW, the AD4112BCPZ uniquely combines integrated current input capability, IEC-certified EMC immunity, and LFCSP packaging - making it the only drop-in solution for compact, ruggedized 4–20 mA + ±10 V industrial I/O modules requiring no external signal conditioning.
Availability
AD4112BCPZ is available at Aetrix Electronics and suitable for process control transmitters, PLC analog input modules, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.
Supply support for AD4112BCPZ 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, headquartered in Norwood, MA, with design centers and manufacturing facilities worldwide.
The AD4112BCPZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for industrial process automation and measurement systems demanding integrated signal conditioning, EMC resilience, and wide-temperature operation.
FAQ
What is the maximum absolute input voltage rating for AD4112BCPZ voltage inputs?
The AD4112BCPZ voltage input pins (VIN0–VIN7, VINCOM) have an absolute maximum rating of ±20 V when AVDD ≥ 4.75 V, and ±12 V when AVDD = 3.0 V. This exceeds typical industrial ±10 V signal ranges and provides margin against transients. The device remains functional up to ±VREF × 10 (±25 V), but operation beyond ±20 V risks damage per Absolute Maximum Ratings table.
Does AD4112BCPZ support simultaneous 50 Hz and 60 Hz line frequency rejection?
Yes, the AD4112BCPZ's Sinc5 + Sinc1 digital filter achieves >85 dB rejection of both 50 Hz and 60 Hz simultaneously at a 27.27 SPS output data rate. This is confirmed in the General Description and Table 1 Normal Mode Rejection specification. It eliminates need for software-based notch filtering in global industrial deployments where line frequency varies by region.
Can AD4112BCPZ operate with only a single power supply?
Yes, the AD4112BCPZ operates from a single AVDD supply (3.0 V to 5.5 V) referenced to AVSS (nominally 0 V), with separate IOVDD (2 V to 5.5 V) for digital I/O. Its analog front end supports bipolar ±10 V inputs without requiring negative supply rails - simplifying power architecture in galvanically isolated 4–20 mA loop-powered systems and reducing bill-of-materials cost.
What is the role of the SYNC pin on AD4112BCPZ?
The SYNC pin on AD4112BCPZ is a synchronization input used to align the digital filters and analog modulators across multiple AD4112BCPZ devices. When asserted, it resets internal timing states to ensure coherent sampling and deterministic phase relationships - essential for synchronized multi-channel acquisition in distributed I/O systems and high-accuracy phase-sensitive measurements.
How does AD4112BCPZ handle current input measurements without external components?
The AD4112BCPZ integrates dedicated current input circuitry with 60 Ω input impedance, supporting 0 mA to 20 mA single-ended inputs directly on IIN0+–IIN3+ pins. Internal biasing and sensing eliminate need for external shunt resistors, op amps, or current-to-voltage converters. Its ±0.08% current accuracy at 25°C and −0.5 mA to +24 mA input range provide safety margin for field wiring faults and transient overloads.
AD4112BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 6.2k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- Serial, SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2V ~ 5.5V
- Voltage - Supply, Digital:
- 2V ~ 5.5V
- Features:
- Internal Oscillator, Temperature Sensor
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 40-LFCSP-VQ (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4112BCPZ FAQ
1.How can I place an order for AD4112BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4112BCPZ 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 AD4112BCPZ reliable?
The price and inventory of AD4112BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4112BCPZ is usually 5 days.
3.What payment methods are accepted for AD4112BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4112BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4112BCPZ?
AD4112BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4112BCPZ 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 AD4112BCPZ?
For technical support, including AD4112BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4112BCPZ requirements.
6.How does Aetrix verify that AD4112BCPZ is sourced from the original manufacturer or authorized distributors?
All AD4112BCPZ 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 AD4112BCPZ meets industry standards.
7.What is the process for return or replacement of AD4112BCPZ?
All AD4112BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD4112BCPZ, 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 AD4112BCPZ part is unused and in its original packaging.
Return procedure for AD4112BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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