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Analog Devices Inc. AD7244JNZ
- Part No.:
- AD7244JNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7244JNZ.pdf
- Description:
- IC DAC 14BIT V-OUT 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,866
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Product details
Overview
AD7244JNZ 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 loops, and automated test equipment requiring matched dual-channel accuracy.
For engineers reviewing the AD7244JNZ datasheet, AD7244JNZ pinout, AD7244JNZ application, or AD7244JNZ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-ready availability details - all specific to the AD7244JNZ plastic DIP-24 package with J-grade (–40°C to +85°C) temperature rating.
Technical Context
The AD7244JNZ implements two independent 14-bit voltage-mode DACs using thin-film resistor ladders and high-speed SPDT switches, with MSBs decoded to drive coarse segments and 11 LSBs switching an R–2R ladder. Each DAC features a dedicated 16-bit serial interface (TCLKA/TFSA/DTA and TCLKB/TFSB/DTB), enabling simultaneous or staggered data loading without cross-talk.
Its on-chip 3 V buried Zener reference (35 ppm/°C tempco, ±10 mV initial tolerance) feeds both DACs via buffered REF INA/REF INB inputs and can source up to 500 µA from REF OUT. Output amplifiers deliver ±3 V into 2 kΩ//100 pF loads with 4 µs settling to ±1/2 LSB and 110 dB channel-to-channel isolation when decoupled per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14 bits - supports 16,384 distinct output levels per channel for high-fidelity signal synthesis |
| Output Voltage Range | ±3 V - enables direct interfacing with bipolar op-amp stages or differential ADC drivers without level-shifting |
| Settling Time | 4 µs to ±1/2 LSB - ensures stable output within one microcontroller instruction cycle at 250 kHz update rate |
| Integral Nonlinearity | ±2 LSB max - guarantees monotonicity and <0.012% full-scale error for closed-loop calibration systems |
| Reference Tempco | 35 ppm/°C typ - contributes <±0.1% FS drift over –40°C to +85°C, critical for uncalibrated embedded instrumentation |
| Channel Isolation | 110 dB typ - prevents crosstalk-induced distortion in dual-tone or I/Q signal generation applications |
| Power Dissipation | 195 mW max - allows operation in thermally constrained enclosures without forced air cooling |
Pinout & Package
AD7244JNZ is housed in a 24-pin, 0.3-inch wide plastic DIP (N-24 package) with dual AGND/DGND, dual VDD/VSS, and fully separated serial control paths for each DAC channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | LDACA / LDACB | Asynchronous latch enable: falling edge transfers data from input latch to DAC latch, enabling precise timing-controlled output updates independent of serial clock |
| 2, 14 | TFSA / TFSB | Frame sync input: active-low signal indicating start of 16-bit serial word; defines data window for TCLKA/TCLKB sampling |
| 3, 15 | DTA / DTB | Serial data input: bitstream loaded on falling edge of respective TCLK; first 2 bits are don't-care for AD7244, followed by 14-bit DAC code (MSB first) |
| 4, 16 | TCLKA / TCLKB | Serial clock input: falling-edge-triggered; 16 cycles per DAC word; minimum 3 ns cycle time supports >300 MHz effective data rate |
| 5, 17, 20 | DGND / AGND | Digital and analog ground pins: must be tied together at device; separation prevents digital noise coupling into analog outputs |
| 7, 19 | VDD | +5 V ±5% supply: powers logic and internal reference; dual pins reduce IR drop and improve PSRR |
| 8, 21 | AGND / VOUTA | Analog ground and DACA output: VOUTA is buffered, low-impedance (0.1 Ω), ±3 V capable output referenced to AGND |
| 9, 22 | VOUTB / VSS | DACB output and –5 V ±5% supply: VOUTB mirrors VOUTA performance; VSS dual-pinning minimizes ground bounce |
| 12, 24 | REF INB / REF INA | DACB/DACA reference inputs: accept 2.85–3.15 V external references or internal REF OUT; internally buffered for low sensitivity to source impedance |
| 23 | REF OUT | 3 V reference output: factory-trimmed buried Zener; drives both REF INA/REF INB directly or external circuitry up to 500 µA load |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent serial interfaces | Eliminates time-multiplexing overhead - each DAC accepts data concurrently, enabling true simultaneous waveform generation |
| On-chip 3 V buried Zener reference | Removes need for external precision reference IC or resistor divider, reducing BOM count and layout area by ≥3 components |
| Separate LDAC inputs per channel | Allows independent output update timing - e.g., DACA updated on system trigger while DACB held static for hold-and-hold operation |
| Bipolar ±3 V output range | Directly drives standard op-amps and analog front-ends without external level-shifting circuitry or rail-splitting networks |
| 110 dB channel-to-channel isolation | Enables clean I/Q modulation or differential signal generation without post-DAC filtering or shielding |
Applications
| Industrial Process Control | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Closed-loop pressure/temperature controller using FPGA-generated setpoints and sensor feedback. IC Role / Device Role / Timing Role: Dual-channel DAC generating analog actuator drive signals (e.g., valve position, heater power) with synchronized update timing. Use Value: Independent LDAC inputs allow DACA to update on PID loop completion while DACB holds previous value during computation - eliminating output glitches during calculation cycles. |
Use Scenario: Multi-channel stimulus generator for mixed-signal IC validation. IC Role / Device Role / Timing Role: Precision waveform synthesizer producing calibrated DC offsets and AC test tones for DUT biasing and characterization. Use Value: Matched 14-bit resolution and 110 dB isolation ensure accurate differential stimulus (e.g., I/Q pairs) without inter-channel leakage corrupting measurement fidelity. |
| Medical Instrumentation | Communications Baseband |
Use Scenario: Ultrasound beamformer requiring precise, low-noise analog bias voltages for transducer elements. IC Role / Device Role / Timing Role: Dual DAC providing independently programmable DC bias and gain-control voltages to analog front-end channels. Use Value: On-chip 3 V reference eliminates external reference drift contribution, maintaining <±0.02% absolute accuracy across operating temperature for regulatory-compliant designs. |
Use Scenario: Direct-conversion radio transceiver baseband section generating I/Q modulation signals. IC Role / Device Role / Timing Role: Dual DAC converting digital I/Q symbols into analog baseband waveforms prior to upconversion. Use Value: 4 µs settling time and ±2 LSB INL support >100 kSPS symbol rates with <0.5% EVM degradation - meeting 3GPP LTE Class 3 linearity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel voltage-output DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7242JNZ | 12-bit resolution, ±1 LSB INL, 3 µs settling, same pinout and serial interface | Lower cost for applications where 12-bit accuracy suffices (e.g., non-critical sensor biasing) | Select AD7242JNZ when system SNR budget allows ≥12-bit ENOB and calibration headroom is available |
| AD5735BRUZ | 14-bit, quad-channel, SPI interface, ±10 V output range, no internal reference | Requires external reference and level-shifting for ±3 V operation; better suited for multi-channel industrial PLC modules | Choose AD5735BRUZ only if expanding beyond dual-channel or needing wider output swing; not pin-compatible |
Compared with AD7244JNZ, AD7242JNZ offers identical form-factor and timing but trades 2 bits of resolution for lower cost and faster settling, while AD5735BRUZ adds channel count and SPI compatibility at the expense of pinout mismatch and external reference dependency - making AD7244JNZ optimal for space-constrained, dual-channel, self-contained precision analog output designs.
Availability
AD7244JNZ is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, medical instrumentation, and communications baseband applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD7244JNZ 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 precision instrumentation, industrial automation, and communications markets since 1965.
The AD7244JNZ belongs to Analog Devices' LC2MOS dual DAC product line, designed specifically for applications demanding matched dual-channel accuracy, integrated reference stability, and minimal external component count in space-constrained embedded systems.
FAQ
What is the operating temperature range for the AD7244JNZ?
The AD7244JNZ is rated for operation from –40°C to +85°C, as indicated by the "J" grade suffix in its part number. This industrial temperature range is validated per the AD7244 ordering guide and applies to the plastic DIP-24 (N-24) package variant. The specification ensures guaranteed performance including ±2 LSB integral nonlinearity and 4 µs settling time across the full range.
Does the AD7244JNZ require an external reference voltage?
No, the AD7244JNZ does not require an external reference voltage because it integrates a factory-trimmed 3 V buried Zener reference (REF OUT) capable of driving both REF INA and REF INB inputs directly. When using the internal reference, connect REF OUT to both REF INA and REF INB. External references are optional and supported within 2.85 V to 3.15 V for improved system-level accuracy or temperature stability.
Can the AD7244JNZ generate bipolar output voltages?
Yes, the AD7244JNZ generates true bipolar analog outputs: VOUTA and VOUTB each deliver ±3 V relative to AGND when powered from ±5 V supplies and configured with a 3 V reference. Its 2's complement input coding supports negative codes (e.g., 0x0000 = 0 V, 0x8000 = –3 V, 0x7FFF = +2.9996 V), enabling seamless zero-centered signal generation without external level-shifting circuitry.
How many pins does the AD7244JNZ use for serial communication per DAC channel?
The AD7244JNZ uses three dedicated pins per DAC channel for serial communication: TFSA/TFSB (frame sync), TCLKA/TCLKB (clock), and DTA/DTB (data). This totals six serial interface pins - enabling fully independent, concurrent data loading to each DAC without shared bus arbitration or timing conflicts.
Is the AD7244JNZ pin-compatible with the AD7242JNZ?
Yes, the AD7244JNZ is pin-compatible with the AD7242JNZ in the same N-24 package. Both share identical pin configuration, power requirements (±5 V), reference architecture, and serial interface protocol. This allows direct hardware replacement to upgrade from 12-bit to 14-bit resolution without PCB redesign - provided the host firmware accommodates the extended 14-bit data word format.
AD7244JNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7244JNZ FAQ
1.How can I place an order for AD7244JNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7244JNZ 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 AD7244JNZ reliable?
The price and inventory of AD7244JNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7244JNZ is usually 5 days.
3.What payment methods are accepted for AD7244JNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7244JNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7244JNZ?
AD7244JNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7244JNZ 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 AD7244JNZ?
For technical support, including AD7244JNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7244JNZ requirements.
6.How does Aetrix verify that AD7244JNZ is sourced from the original manufacturer or authorized distributors?
All AD7244JNZ 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 AD7244JNZ meets industry standards.
7.What is the process for return or replacement of AD7244JNZ?
All AD7244JNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7244JNZ, 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 AD7244JNZ part is unused and in its original packaging.
Return procedure for AD7244JNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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