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Analog Devices Inc. AD7244JRZ-REEL
- Part No.:
- AD7244JRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7244JRZ-REEL.pdf
- Description:
- IC DAC 14BIT V-OUT 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,752
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Product details
Overview
AD7244JRZ-REEL from Analog Devices is a dual, 14-bit, voltage-output serial DAC with integrated 3 V buried Zener reference, output buffer amplifiers, and independent serial interfaces per channel. It operates from ±5 V supplies, delivers ±3 V bipolar analog outputs, and supports asynchronous DAC updating via separate LDACA/LDACB inputs. It is used in precision waveform generation, industrial control loop outputs, and calibration systems requiring stable dual-channel analog voltage synthesis.
For engineers reviewing the AD7244JRZ-REEL datasheet, AD7244JRZ-REEL pinout, AD7244JRZ-REEL application, or AD7244JRZ-REEL equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SOIC-28 pin functions, confirmed alternatives with functional differences, and supply-ready availability details - all grounded in Analog Devices' official REV. A documentation.
Technical Context
The AD7244JRZ-REEL implements two independent 14-bit voltage-mode DACs using thin-film resistor ladders and high-speed SPDT switches, with the 11 LSBs switching an 11-bit R-2R structure. Each DAC features a dedicated serial port (TCLKA/TFSA/DTA and TCLKB/TFSB/DTB) accepting 16-bit frames - only the 14 MSBs affect conversion, with 2 LSBs as don't-care bits.
It integrates a factory-trimmed, temperature-compensated 3 V buried Zener reference (REF OUT), capable of sourcing up to 500 µA and exhibiting 35 ppm/°C tempco. REF OUT can drive both REF INA and REF INB directly, or be bypassed in favor of external references like the AD586; output buffers deliver ±3 V into 2 kΩ || 100 pF loads with <2.5 µs settling to ±1/2 LSB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14 bits - enables 16,384 discrete output levels across ±3 V range, supporting sub-millivolt control granularity in closed-loop systems. |
| Integral Nonlinearity | ±2 LSB max - ensures monotonicity and predictable transfer function error within ±0.12% of full scale (±3 V). |
| Settling Time | 4 µs max to ±1/2 LSB - guarantees fast, deterministic update timing for dynamic waveform synthesis at >100 kHz update rates. |
| Reference Output | 3.00 V ±10 mV @ +25°C, 35 ppm/°C - provides stable, low-drift bias for both DACs without external components in standard industrial environments. |
| Supply Voltage | ±5 V ±5% - requires dual-rail power but eliminates need for charge pumps or DC-DC converters in ±5 V system architectures. |
| Power Dissipation | 195 mW max (130 mW typ) - enables operation in thermally constrained PCB layouts without forced air or heatsinking. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, motor drive feedback, and automated test equipment. |
Pinout & Package
AD7244JRZ-REEL is housed in a 28-pin plastic small outline IC (SOIC) package, 0.300-inch wide, with gull-wing leads and RoHS-compliant finish. Pin numbering follows standard SOIC convention (pin 1 marked, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LDACA, LDACB | DAC latch update control (active-low) | Asynchronously triggers output update for DACA/VOUTA or DACB/VOUTB; allows precise timing alignment independent of serial data loading. |
| TFSA, TFSB | Serial frame sync (active-low) | Signals start of 16-bit data frame for respective DAC; must go low before first TCLK edge to enable valid serial reception. |
| TCLKA, TCLKB | Serial clock input (falling-edge sensitive) | Latches DTA/DTB data on falling edge; 16 edges per frame define full word load; timing compatible with DSP/microcontroller SPI-like ports. |
| DTA, DTB | Serial data input | Accepts 16-bit words - only 14 MSBs used for AD7244 conversion; LSBs are don't-care and may be omitted or zero-padded. |
| VOUTA, VOUTB | Analog voltage outputs | Bipolar ±3 V buffered outputs; each drives 2 kΩ || 100 pF loads; short-circuit protected to 20 mA; updated only on LDAC assertion. |
| REF INA, REF INB | DAC reference inputs | Accept internal 3 V REF OUT or external 2.85–3.15 V source; internally buffered to reject noise and load variation. |
| REF OUT | On-chip reference output | 3 V ±10 mV Zener reference; 500 µA drive capability; requires ≤50 pF capacitive load or series 200 Ω resistor for larger loads. |
| VDD, VSS | Positive/negative supply rails | Two VDD pins (pins 14 & 28) and two VSS pins (pins 13 & 27) must be tied together locally; decoupling recommended at each pair. |
| AGND, DGND | Analog/digital ground | Separate AGND (pins 10 & 25) and DGND (pins 9 & 26) pins require star grounding or low-impedance plane separation to minimize digital noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent serial interfaces | Enables simultaneous, non-interfering updates of two analog channels - critical for synchronized multi-axis motion control or I/Q signal generation. |
| On-chip 3 V buried Zener reference | Eliminates external reference IC and associated layout complexity while maintaining 35 ppm/°C stability over –40°C to +85°C. |
| Asynchronous LDAC control per DAC | Decouples data loading from output update timing - allows background serial transfers and deterministic, jitter-free output transitions. |
| Channel-to-channel isolation | 110 dB (with proper REF OUT decoupling) - prevents crosstalk between DAC outputs in mixed-signal systems such as sensor excitation and measurement circuits. |
| LC2MOS process technology | Combines precision bipolar DAC core with low-power CMOS logic - achieves 14-bit linearity and 4 µs settling while consuming only 130 mW typical. |
Applications
| Industrial Process Control | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Generating precise ±3 V setpoint voltages for PID controllers regulating temperature, pressure, or flow in PLC-based systems. IC Role / Device Role / Timing Role: Dual-channel DAC providing isolated, synchronized analog outputs for actuator drive and sensor biasing. Use Value: 14-bit resolution enables 0.37 mV step size across ±3 V range, supporting <0.01% setpoint accuracy required by ISO 9001 calibration workflows. |
Use Scenario: Stimulating DUTs with calibrated analog waveforms (sine, ramp, arbitrary) during functional validation. IC Role / Device Role / Timing Role: High-fidelity waveform generator core with independent channel timing for stimulus/response correlation. Use Value: 4 µs settling time and 110 dB channel isolation ensure clean, low-distortion signals up to 20 kHz - meeting IEEE 1687 boundary-scan test requirements. |
| Motor Drive Feedback Calibration | Medical Instrumentation |
Use Scenario: Calibrating current-sense amplifier offsets and gain in servo motor inverters using precision reference voltages. IC Role / Device Role / Timing Role: Dual DAC supplying matched bipolar trim voltages to op-amp summing nodes during factory calibration. Use Value: Guaranteed monotonicity and ±2 LSB INL ensure repeatable, NIST-traceable calibration curves across production batches. |
Use Scenario: Generating programmable bias voltages for photodiode transimpedance amplifiers in portable blood analyzers. IC Role / Device Role / Timing Role: Low-noise, low-drift analog output source for optical sensor front-end conditioning. Use Value: 30 nV/√Hz output amplifier noise and 35 ppm/°C reference drift meet IEC 60601-2-27 ECG signal integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, serial-input DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7244JRZ | Same die, identical specs, but supplied in tube (non-reel) packaging; no tape-and-reel logistics support. | Suitable for low-volume prototyping or manual assembly where reel feeding is unnecessary. | Select AD7244JRZ-REEL for SMT production lines requiring automated pick-and-place; choose AD7244JRZ for bench evaluation or small-batch builds. |
| AD7248ARZ | 12-bit dual DAC in same SOIC-28 package; faster 2 µs settling; lower ±1 LSB INL; lacks on-chip reference (requires external 3 V ref). | Better for cost-sensitive, high-speed applications where 12-bit resolution suffices and external reference is already present. | Choose AD7244JRZ-REEL when 14-bit precision, integrated reference, and industrial temp range are mandatory; AD7248ARZ fits where speed and BOM simplification outweigh resolution needs. |
Compared with AD7244JRZ (tube) and AD7248ARZ (12-bit, no ref), AD7244JRZ-REEL uniquely delivers production-ready tape-and-reel delivery, guaranteed 14-bit monotonicity, and self-contained 3 V reference - making it optimal for volume-manufactured industrial controllers requiring long-term calibration stability.
Availability
AD7244JRZ-REEL is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, and medical instrumentation requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for AD7244JRZ-REEL 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 Wilmington, MA, with design centers worldwide.
The AD7244 belongs to Analog Devices' precision DAC product line, engineered for applications demanding high-resolution, low-drift analog output generation in industrial, instrumentation, and medical systems.
FAQ
What is the reference voltage specification for AD7244JRZ-REEL?
The AD7244JRZ-REEL features an on-chip 3 V buried Zener reference (REF OUT) trimmed to 2.99 V to 3.01 V at +25°C, with a maximum tempco of 35 ppm/°C over –40°C to +85°C. It can source up to 500 µA and must drive ≤50 pF capacitance directly; larger loads require a 200 Ω series resistor. This reference is used internally for both DACs when REF OUT is connected to REF INA and REF INB.
Does AD7244JRZ-REEL support independent updating of its two DAC outputs?
Yes, AD7244JRZ-REEL supports fully independent updating via separate LDACA and LDACB inputs. Asserting LDACA updates only VOUTA; asserting LDACB updates only VOUTB. This allows asynchronous, channel-specific output changes - essential for applications like I/Q modulation or staggered control loop updates - without affecting the other channel's output state.
What package type and lead finish does AD7244JRZ-REEL use?
AD7244JRZ-REEL is supplied in a 28-pin plastic small outline IC (SOIC) package, 0.300-inch wide, with gull-wing leads and lead-free (Pb-free), RoHS-compliant termination. The "RZ" suffix denotes this SOIC package, and "-REEL" indicates tape-and-reel packaging optimized for automated SMT assembly.
Can AD7244JRZ-REEL operate with an external reference instead of the internal one?
Yes, AD7244JRZ-REEL accepts external references via REF INA and REF INB pins, which accept 2.85 V to 3.15 V (3 V ±5%). The internal REF OUT must be left unconnected in this mode. External references like the AD586 can improve system-level accuracy or enable shared reference architecture across multiple devices - though the internal reference remains available for standalone operation.
What is the maximum serial data rate supported by AD7244JRZ-REEL?
AD7244JRZ-REEL supports a minimum TCLK cycle time of 150 ns (J/A versions) - corresponding to a maximum serial clock frequency of ~6.7 MHz. Data is latched on the falling edge of TCLK, and each 16-bit frame requires 16 clock cycles. Timing margins allow reliable interfacing with common microcontrollers (e.g., 68HC11, 87C51) and DSPs (e.g., ADSP-2101, DSP56000) without additional logic.
AD7244JRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 14
- Number of D/A Converters:
- 2
- Settling Time:
- 4µs
- Output Type:
- Voltage - Buffered
- Differential Output:
- No
- Data Interface:
- SPI
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- -
- INL/DNL (LSB):
- ±2 (Max), ±1 (Max)
- Architecture:
- R-2R
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7244JRZ-REEL FAQ
1.How can I place an order for AD7244JRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7244JRZ-REEL 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 AD7244JRZ-REEL reliable?
The price and inventory of AD7244JRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7244JRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7244JRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7244JRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7244JRZ-REEL?
AD7244JRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7244JRZ-REEL 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 AD7244JRZ-REEL?
For technical support, including AD7244JRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7244JRZ-REEL requirements.
6.How does Aetrix verify that AD7244JRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7244JRZ-REEL 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 AD7244JRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7244JRZ-REEL?
All AD7244JRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7244JRZ-REEL, 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 AD7244JRZ-REEL part is unused and in its original packaging.
Return procedure for AD7244JRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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