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Analog Devices Inc. AD4112BCPZ-RL7
- Part No.:
- AD4112BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD4112BCPZ-RL7.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 40LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:598
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Product details
Overview
AD4112BCPZ-RL7 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 channels), 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-RL7 datasheet, AD4112BCPZ-RL7 pinout, AD4112BCPZ-RL7 application, or AD4112BCPZ-RL7 equivalent, key selection considerations include its dual-input capability (voltage + current), IEC61000-4-x EMC robustness, on-chip 2.5 V reference (±0.12% initial accuracy), 85 dB 50/60 Hz rejection at 20 SPS, and SPI/QSPI/MICROWIRE compatibility for PLC and DCS module integration.
Technical Context
The AD4112BCPZ-RL7 integrates a proprietary iPassives™ AFE enabling simultaneous high-impedance (≥1 MΩ) ±10 V voltage sensing and low-impedance (60 Ω) 0–20 mA loop measurement across eight configurable input channels. Its Sinc5+Sinc1 digital filter delivers 16 noise-free bits at 1 kSPS and supports automatic channel sequencing with 161 µs settling per channel.
It features dual independent power domains (AVDD = 3.0–5.5 V, IOVDD = 2–5.5 V), internal 2 MHz clock or external crystal/CLKIO support, and robust digital interface with Schmitt-triggered SCLK, CRC checksum protection, and DOUT/RDY interrupt signaling - all operating across −40°C to +105°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit sigma-delta ADC with no missing codes ≥15 kHz notch (sinc3) |
| Input Ranges | ±10 V (voltage, ≥1 MΩ), 0–20 mA (current, 60 Ω typical), −0.5 to +24 mA functional range |
| Accuracy | ±0.06% FS voltage error, ±0.08% FS current error at 25°C (internal reference) |
| Rejection | 85 dB 50/60 Hz rejection at 20 SPS; 120 dB common-mode rejection at DC |
| Output Rate | 1.25 SPS to 31.25 kSPS; 6.21 kSPS max channel scan rate (fully settled) |
| Reference | On-chip 2.5 V bandgap reference, ±0.12% initial accuracy, ±5 ppm/°C drift (typical) |
| Power | Total IDD = 3.9 mA (full operation); 120 µA standby; 90 µA power-down |
Pinout & Package
The AD4112BCPZ-RL7 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 24 is internally connected to AVSS; Pins 10 and 23 are DNC (do not connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN7 | Voltage input terminals | Support 8 single-ended (vs. VINCOM) or 4 differential pairs; high-Z (≥1 MΩ) bipolar input stage |
| IIN0+–IIN3+ | Current input sourcing pins | Accept 0–20 mA loop current; absolute pin voltage range −0.05 V to AVDD + 0.055 V |
| IIN0−–IIN3− | Current return terminals | Connected to AVSS; enable 4-channel isolated current measurement with 60 Ω sense impedance |
| REF+, REF− | Reference input terminals | Accept external 1–2.5 V differential reference or buffer internal 2.5 V REFOUT |
| DOUT/RDY | Serial data output / conversion ready | Tri-state SPI output; active-low RDY signal indicates valid conversion data available |
| SYNC | Synchronization input | Aligns digital filters and modulators across multiple AD4112BCPZ-RL7 devices in multi-channel systems |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-x EMC compliance | Tested to IEC61000-4-2 (ESD), -4-3 (RS), -4-4 (EFT), -4-5 (Surge), -4-6 (CS), and CISPR 11 radiated emissions |
| Configurable digital filtering | Selectable Sinc5+Sinc1 or Sinc3 filters; enables simultaneous 50 Hz/60 Hz rejection at 27.27 SPS |
| Integrated temperature sensor | ±2°C accuracy after user calibration at 25°C; 477 µV/K sensitivity for system-level thermal monitoring |
| Flexible clock architecture | Internal 2 MHz oscillator (±2.5%) or external 14–16.384 MHz crystal/CLKIO; supports synchronous multi-device operation |
| Robust digital interface | SPI/QSPI/MICROWIRE/DSP-compatible 3-/4-wire serial interface with CRC checksum, error flag mapping, and Schmitt-triggered SCLK |
| General-purpose outputs | GPO0/GPO1 referenced to AVDD/AVSS; programmable logic outputs for status indication or timing control |
Applications
| Process Control Transmitter | PLC Analog Input Module |
|---|---|
Use Scenario: Field-mounted pressure/temperature transmitter converting 4–20 mA sensor output and ±10 V auxiliary signals into digital data for remote SCADA systems. IC Role / Device Role / Timing Role: Primary ADC with integrated current/voltage AFE, performing synchronized sampling and digital filtering before SPI transmission. Use Value: Eliminates external precision op-amps, shunt resistors, and reference ICs-reducing BOM count by ≥4 components while maintaining ±0.08% current measurement accuracy over −40°C to +105°C. |
Use Scenario: Modular I/O card in industrial PLC rack acquiring analog signals from multiple sensors across 8 voltage or 4 current channels. IC Role / Device Role / Timing Role: High-accuracy, multi-channel ADC with auto-sequencing and channel-specific filter configuration per input type. Use Value: Enables 6.21 kSPS per-channel scan rate with full settling (161 µs), allowing real-time monitoring of fast transients without external multiplexer latency or settling delays. |
| DCS Distributed I/O Node | Portable Calibration Instrument |
Use Scenario: Remote DCS node collecting analog process variables (flow, level, pH) via 0–20 mA loops and ±10 V sensor outputs in hazardous-area enclosures. IC Role / Device Role / Timing Role: Isolated ADC with galvanic separation support, leveraging single-supply operation (AVDD only) and robust EMC immunity. Use Value: Meets IEC61000-4-5 surge immunity (4 kV line-to-earth) and IEC61000-4-4 EFT (2 kV) requirements out-of-the-box-reducing external protection component count by ≥3 TVS diodes and RC networks. |
Use Scenario: Handheld field calibrator verifying transmitter accuracy by sourcing precise 4–20 mA and measuring ±10 V feedback simultaneously. IC Role / Device Role / Timing Role: Dual-function metrology-grade ADC with factory-calibrated gain/offset and on-chip 2.5 V reference traceable to NIST standards. Use Value: Delivers 16 noise-free bits at 1 kSPS and ±0.06% voltage accuracy-enabling sub-0.01% calibration uncertainty without external reference or post-calibration software correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-accuracy industrial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4111BCPZ-RL7 | Same pinout and feature set but lacks current input circuitry (voltage-only: ±10 V, 8 SE/4 diff) | Not suitable for 4–20 mA loop measurement; requires external current-to-voltage conversion | Select when only voltage inputs are needed and board space must be minimized without sacrificing resolution or filtering flexibility |
| ADS131M04IPBSR | 4-channel, 24-bit delta-sigma ADC; no integrated current inputs; lower power (2.3 mA), no on-chip reference | Requires external 2.5 V reference and precision shunts for current measurement; limited to 4 channels total | Choose for ultra-low-power battery-operated systems where current input integration is handled externally and cost-per-channel is prioritized |
Compared with AD4111BCPZ-RL7 and ADS131M04IPBSR, the AD4112BCPZ-RL7 uniquely combines voltage and current input paths in one IC with factory-trimmed accuracy, eliminating external signal conditioning while supporting full 8-channel voltage or 4-channel current acquisition in the same footprint-critical for space-constrained modular I/O designs.
Availability
AD4112BCPZ-RL7 is available at Aetrix Electronics and suitable for process control transmitters, PLC analog input modules, and DCS distributed I/O nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability for industrial certification.
Supply support for AD4112BCPZ-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, headquartered in Norwood, MA, with design centers and manufacturing facilities worldwide.
The AD4112BCPZ-RL7 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for industrial automation applications demanding integrated signal conditioning, high EMC immunity, and extended temperature operation without external calibration.
FAQ
What is the maximum input voltage rating for AD4112BCPZ-RL7 voltage inputs?
The AD4112BCPZ-RL7 has an absolute maximum pin voltage rating of ±20 V (when AVDD ≥ 4.75 V) and ±12 V (when AVDD = 3.0 V), with specified performance guaranteed over ±10 V differential input range. Exceeding these limits risks permanent damage per Table 3 Absolute Maximum Ratings.
Does AD4112BCPZ-RL7 support simultaneous sampling of voltage and current inputs?
No - the AD4112BCPZ-RL7 uses a single sigma-delta modulator with time-multiplexed input channels. Voltage and current inputs share the same conversion path and cannot be sampled at identical instants; however, its 161 µs per-channel settling enables near-simultaneous acquisition across configured channels in sequencer mode.
Can AD4112BCPZ-RL7 operate with only AVDD powered, without IOVDD?
No - AD4112BCPZ-RL7 requires both AVDD (3.0–5.5 V) and IOVDD (2–5.5 V) supplies to function. IOVDD powers the digital interface (SPI, GPIO, registers); omitting it prevents communication and causes undefined behavior, as confirmed in Table 1 Power Requirements and Pin Descriptions.
What is the purpose of the SYNC pin on AD4112BCPZ-RL7?
The SYNC pin on AD4112BCPZ-RL7 synchronizes the digital filters and analog modulators across multiple AD4112BCPZ-RL7 devices, ensuring coherent sampling alignment in multi-ADC systems such as high-channel-count DCS I/O cards - critical for phase-accurate measurements in motor control or power quality analyzers.
Is the internal 2.5 V reference of AD4112BCPZ-RL7 buffered and available for external use?
Yes - the AD4112BCPZ-RL7 provides a buffered 2.5 V reference on the REFOUT pin (Pin 6), specified for ±10 mA load current, with ±0.12% initial accuracy and ±5 ppm/°C typical drift. It must be decoupled to AVSS using a 0.1 µF capacitor per Figure 4 and Table 5.
AD4112BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- 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-RL7 FAQ
1.How can I place an order for AD4112BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4112BCPZ-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 AD4112BCPZ-RL7 reliable?
The price and inventory of AD4112BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4112BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4112BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4112BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4112BCPZ-RL7?
AD4112BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4112BCPZ-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 AD4112BCPZ-RL7?
For technical support, including AD4112BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4112BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4112BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4112BCPZ-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 AD4112BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4112BCPZ-RL7?
All AD4112BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4112BCPZ-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 AD4112BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4112BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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