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Analog Devices Inc. AD5749ACPZ
- Part No.:
- AD5749ACPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD5749ACPZ.pdf
- Description:
- IC INST AMP 1 CIRCUIT 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:145
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Product details
Overview
AD5749ACPZ from Analog Devices is a single-channel, precision industrial current output driver supporting 0 mA to 24 mA or 4 mA to 20 mA programmable ranges, ±0.03% FSR typical total unadjusted error (TUE), ±5 ppm/°C typical output drift, and operation up to 55 V AVDD supply. It serves as a loop-powered analog output stage in PLC I/O modules and process controllers interfacing with low-voltage DACs.
For engineers reviewing the AD5749ACPZ datasheet, AD5749ACPZ pinout, AD5749ACPZ application, or AD5749ACPZ equivalent, key selection criteria include its hardware/software mode configuration via HW SELECT, open-circuit fault detection on IOUT, SPI/MICROWIRE-compatible 3-wire interface with optional CRC-8 PEC, and compliance to AVDD − 2.75 V across −40°C to +105°C.
Technical Context
The AD5749ACPZ implements a precision current-output architecture with internal or external RSET resistor selection, enabling configurable gain scaling for two standard industrial current ranges. Its output stage supports inductive loads up to 0.1 H and features open-circuit protection with dedicated FAULT/TEMP and NC/IFAULT pins for fault reporting.
Digital control is implemented via a flexible serial interface supporting both software mode (SPI register programming) and hardware mode (pin-strapped range selection using R0–R3). The device includes asynchronous CLEAR, power-on reset, and an OUTEN function multiplexed on SCLK/OUTEN in hardware mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Ranges | 0 mA to 24 mA or 4 mA to 20 mA - selectable per application wiring or register config; enables compatibility with legacy 4–20 mA sensors and high-range actuators |
| Total Unadjusted Error (TUE) | ±0.03% FSR typical - ensures <±7.2 µA absolute error at 24 mA full scale, critical for closed-loop control accuracy |
| Output Drift | ±5 ppm/°C typical - translates to <±1.2 µA drift over 100°C ambient swing, minimizing calibration burden in wide-temperature environments |
| Supply Range (AVDD) | 10.8 V to 55 V - supports direct connection to industrial 24 V and 48 V DC bus rails without external regulation |
| Loop Compliance | 0 V to AVDD − 2.75 V - allows ≥52.25 V headroom at max 55 V supply, sufficient for long cable runs with voltage drop |
| Interface | SPI/MICROWIRE-compatible, 3-wire mode - reduces isolation component count in safety-critical field transmitters |
| Operating Temperature | −40°C to +105°C - qualified for cabinet-mounted PLC backplanes and outdoor process enclosures |
Pinout & Package
AD5749ACPZ uses a 32-lead, 5 mm × 5 mm LFCSP package with exposed paddle tied to GND. Pin functions are mode-dependent: software mode uses SDIN/R0, AD2/R1, AD1/R2, AD0/R3 for address/data; hardware mode repurposes them as range decode bits R0–R3. HW SELECT sets boot mode; SYNC/RSET selects internal/external RSET; FAULT/TEMP and NC/IFAULT provide open-drain fault alerts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HW SELECT | Boot Configuration Input | High = hardware mode (pin-strapped range); Low = software mode (SPI register control) |
| SYNC/RSET | Mode-Dependent Control | Software: parallel load clock; Hardware: selects internal (RSET=1) or external (RSET=0) current sense resistor |
| SCLK/OUTEN | Mode-Dependent Control | Software: serial clock input (≤50 MHz); Hardware: output enable active-high signal |
| FAULT/TEMP | Fault Alert Output | Open-drain; asserts low on open-circuit, overtemperature, or PEC error (software mode); overtemperature only (hardware mode) |
| NC/IFAULT | Fault Alert Output | Software mode: no-connect (tie to GND); Hardware mode: open-drain open-circuit fault alert |
| IOUT | Current Output Terminal | Drives 4–20 mA or 0–24 mA loop; open-circuit protected; supports 0.1 H inductive loads |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Current Ranges | 0–24 mA or 4–20 mA selectable in hardware or software - eliminates need for external shunt resistors or range-switching relays |
| On-Chip Fault Detection | Dedicated open-circuit, overtemperature, and PEC interface error reporting - enables predictive maintenance and safe shutdown without external monitoring circuitry |
| Flexible Serial Interface | SPI/MICROWIRE-compatible with 3-wire option and CRC-8 PEC - reduces digital isolation requirements and improves data integrity in noisy factory floors |
| Asynchronous CLEAR Function | Active-high pin forcing output to zero-scale or midscale of selected range - provides deterministic fail-safe state during emergency stop sequences |
| Inductive Load Driving | Rated for 0.1 H loads with appropriate external capacitor - supports direct connection to solenoid valves and motor positioners without snubber networks |
Applications
| Process Control Transmitter | PLC Analog Output Module |
|---|---|
Use Scenario: Converting sensor readings (e.g., pressure, temperature) into standardized 4–20 mA signals for remote monitoring over 1 km twisted-pair cables. IC Role / Device Role / Timing Role: Precision current output driver receiving buffered 0–4.096 V analog input from upstream DAC; regulates loop current with <±7.2 µA TUE. Use Value: Maintains signal integrity across long distances and varying supply voltages; built-in open-circuit detection prevents undetected sensor failure. |
Use Scenario: Providing isolated analog outputs in modular PLC chassis where each slot delivers multiple 0–24 mA channels to control pneumatic actuators. IC Role / Device Role / Timing Role: Industrial current driver operating from 24 V backplane rail; configured via SPI for dynamic range switching between 4–20 mA and 0–24 mA per channel. Use Value: Eliminates external range-selection logic; 3-wire SPI interface minimizes optocoupler count in galvanically isolated designs. |
| Actuator Interface Board | Field Instrument Calibration Tool |
Use Scenario: Driving 0.1 H solenoid valves in hazardous-area explosion-proof enclosures requiring intrinsic safety compliance. IC Role / Device Role / Timing Role: Current source output stage with integrated inductive load handling; uses external REXT1/REXT2 resistor to reduce temperature drift to ±2 ppm/°C. Use Value: Avoids external flyback diodes and RC snubbers; thermal stability enables calibration-free operation over −40°C to +105°C ambient. |
Use Scenario: Portable handheld calibrator generating precise 4–20 mA test signals for field verification of flow meters and level transmitters. IC Role / Device Role / Timing Role: Battery-powered current source with CLEAR pin enabling instant zero-current reset before test sequence initiation. Use Value: Asynchronous CLEAR ensures repeatable start conditions; 55 V AVDD headroom supports operation with depleted batteries and line-drop compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar industrial current output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5751ACPZ | Supports both current and voltage outputs (0–20 V, ±10 V); higher TUE (±0.05% FSR); same 32-lead LFCSP package | Required when system needs dual-mode I/V output flexibility or higher voltage drive capability | Select AD5751ACPZ if voltage output capability or wider output format support is needed; AD5749ACPZ is optimized for pure current-loop cost and footprint efficiency |
| AD5422BCPZ | 16-bit DAC + current/voltage driver; integrated reference; higher resolution but larger 40-lead LFCSP; no PEC error checking | Used in high-precision, self-contained transmitter designs needing DAC+driver integration | Choose AD5422BCPZ for embedded DAC functionality and tighter INL (±0.003% FSR); AD5749ACPZ offers lower BOM cost and simpler interface for DAC-fed systems |
Compared with AD5751ACPZ and AD5422BCPZ, the AD5749ACPZ delivers lowest-cost, smallest-footprint dedicated current output with best-in-class drift performance and industrial-grade fault reporting-ideal when only precision 4–20/0–24 mA drive is required.
Availability
AD5749ACPZ is available at Aetrix Electronics and suitable for process control transmitters, PLC analog output modules, and actuator interface boards requiring stable component supply across extended industrial temperature ranges and long product lifecycles.
Supply support for AD5749ACPZ 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 and manufacturing operations worldwide.
The AD5749ACPZ belongs to Analog Devices' industrial process control driver family, engineered specifically for robust, high-accuracy 4–20 mA and 0–24 mA loop-powered applications in harsh electromagnetic and thermal environments.
FAQ
What is the maximum supply voltage rating for the AD5749ACPZ?
The AD5749ACPZ supports an absolute maximum AVDD supply voltage of +58 V, with recommended operational range from 10.8 V to 55 V. This allows direct connection to standard industrial 24 V and 48 V DC power rails while maintaining full specification compliance across −40°C to +105°C. Exceeding 55 V may impact long-term reliability and is not guaranteed per datasheet limits.
How does the AD5749ACPZ handle open-circuit detection on the IOUT pin?
The AD5749ACPZ provides dual-path open-circuit fault reporting: in software mode, FAULT/TEMP asserts low on open-circuit events; in hardware mode, NC/IFAULT serves this function. Both outputs are open-drain and require external pull-up resistors. Detection is internal and automatic-no external components or firmware polling required-and triggers within microseconds of loop breakage.
Can the AD5749ACPZ drive inductive loads, and what is the maximum supported inductance?
Yes, the AD5749ACPZ is explicitly rated to drive inductive loads up to 0.1 H. When driving such loads, a capacitor must be placed between REXT1 and REXT2 pins per the datasheet layout guidelines to ensure stability. This capability enables direct interface with solenoid valves, relay coils, and small actuators without external flyback protection circuitry.
What is the purpose of the REXT1 and REXT2 pins on the AD5749ACPZ?
The REXT1 and REXT2 pins accept a 15 kΩ external resistor that improves output temperature drift performance from ±5 ppm/°C (internal RSET) to ±2 ppm/°C. This resistor connects directly across the pins and forms part of the precision current-setting network-no additional biasing or amplification is required. Its use is optional but recommended for high-stability applications.
Does the AD5749ACPZ support both hardware and software configuration modes, and how are they selected?
Yes, the AD5749ACPZ supports dual configuration modes selected by the HW SELECT pin: logic low enables software mode (SPI register control of range, fault behavior, and output state); logic high enables hardware mode (range set by R0–R3 pins, fault reporting split across FAULT/TEMP and NC/IFAULT). Mode selection is latched at power-on reset and remains fixed until next power cycle.
AD5749ACPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 5.2mA
- Current - Output / Channel:
- 24 mA
- Voltage - Supply Span (Min):
- 10.8 V
- Voltage - Supply Span (Max):
- 55 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP-VQ (5x5)
AD5749ACPZ FAQ
1.How can I place an order for AD5749ACPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5749ACPZ 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 AD5749ACPZ reliable?
The price and inventory of AD5749ACPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5749ACPZ is usually 5 days.
3.What payment methods are accepted for AD5749ACPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5749ACPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5749ACPZ?
AD5749ACPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5749ACPZ 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 AD5749ACPZ?
For technical support, including AD5749ACPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5749ACPZ requirements.
6.How does Aetrix verify that AD5749ACPZ is sourced from the original manufacturer or authorized distributors?
All AD5749ACPZ 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 AD5749ACPZ meets industry standards.
7.What is the process for return or replacement of AD5749ACPZ?
All AD5749ACPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD5749ACPZ, 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 AD5749ACPZ part is unused and in its original packaging.
Return procedure for AD5749ACPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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