AD664TD-UNI/883B - 12-Bit Quad DAC, Military | Analog Devices
MPN: AD664TD-UNI/883B ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $45 | $45.00 |
| 10 | $40 | $400.00 |
| 100 | $35 | $3,500.00 |
| 500 | $30 | $15,000.00 |
| 1,000 | $25 | $25,000.00 |
AD664TD-UNI/883B Overview
A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. The AD664 is a quad DAC, meaning it contains four independent DAC channels on one chip, enabling simultaneous multi-channel analog output from a single digital interface. This device belongs to the family of data converters, which are essential in mixed-signal systems where digital processing meets the analog world. The AD664's architecture uses the BiMOS II process, combining bipolar and CMOS transistors, along with laser-trimmed thin-film resistors and double-level metal interconnects to achieve high accuracy and stability.
Key features of the AD664TD-UNI/883B include four complete voltage-output DACs, data register readback, reset-to-zero override, multiplying operation, and double-buffered latches. The device offers a settling time of 10 microseconds (as per Xecor comparison data) and operates over the full military temperature range of -55°C to +125°C. The package is a 28-pin side-brazed ceramic DIP, which is suitable for high-reliability applications. The device is RoHS non-compliant, reflecting its military-grade heritage.
The AD664 uses a double-buffered input latch structure, allowing all four DACs to be updated simultaneously, which is critical for applications requiring synchronized analog outputs. The data readback function enables verification of written data, enhancing system diagnostics. The reset-to-zero override forces all outputs to zero, useful for system initialization. The multiplying operation allows the reference voltage to be varied, enabling programmable gain or attenuation.
Typical applications include military avionics, industrial process control, automatic test equipment (ATE), and precision instrumentation where multiple analog outputs are needed. The military screening ensures reliability in harsh environments. The parallel interface simplifies connection to microprocessors and DSPs.
When designing with this device, ensure adequate decoupling on the power supply and reference pins, and consider the settling time when updating multiple channels. The device is obsolete, so verify availability and consider alternatives for new designs.
Drop-in alternatives for AD664TD-UNI/883B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD664TD-UNI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD664TD-BIP/883B
✅ Drop-In📋 Reference alternative (not in catalog)
5962-8871902MXA
✅ Drop-In📋 Reference alternative (not in catalog)
AD664AD-BIP
✅ Drop-In📋 Reference alternative (not in catalog)
AD664TD-UNI/883B Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Number of Channels | 4 Channel |
| Settling Time | 10 us |
| Output Type | Voltage |
| Interface Type | Parallel |
| Reference Type | External |
| Output Range | Unipolar (UNI) |
| Package Type | DIP, Side Brazed, Ceramic, DIP-28 |
| Number of Pins | 28 |
| Operating Temperature Range | -55°C to +125°C |
| Screening Level | Military |
| RoHS Status | Non-compliant |
| Mounting Type | Through Hole |
AD664TD-UNI/883B Pin Configuration
| Pin 1 | VREF — Reference voltage input |
| Pin 2 | VOUT1 — Analog output channel 1 |
| Pin 3 | VOUT2 — Analog output channel 2 |
| Pin 4 | VOUT3 — Analog output channel 3 |
| Pin 5 | VOUT4 — Analog output channel 4 |
| Pin 6 | AGND — Analog ground |
| Pin 7 | DGND — Digital ground |
| Pin 8 | DB0 — Data bus bit 0 |
| Pin 9 | DB1 — Data bus bit 1 |
| Pin 10 | DB2 — Data bus bit 2 |
| Pin 11 | DB3 — Data bus bit 3 |
| Pin 12 | DB4 — Data bus bit 4 |
| Pin 13 | DB5 — Data bus bit 5 |
| Pin 14 | DB6 — Data bus bit 6 |
| Pin 15 | DB7 — Data bus bit 7 |
| Pin 16 | DB8 — Data bus bit 8 |
| Pin 17 | DB9 — Data bus bit 9 |
| Pin 18 | DB10 — Data bus bit 10 |
| Pin 19 | DB11 — Data bus bit 11 |
| Pin 20 | CS — Chip select |
| Pin 21 | WR — Write strobe |
| Pin 22 | RD — Read strobe |
| Pin 23 | A0 — Address bit 0 |
| Pin 24 | A1 — Address bit 1 |
| Pin 25 | CLR — Clear (reset to zero) |
| Pin 26 | VDD — Positive power supply |
| Pin 27 | VSS — Negative power supply |
| Pin 28 | VREF — Reference voltage input (duplicate) |
Typical Applications
AD664TD-UNI/883B is suitable for 6 applications: Military Avionics, Industrial Process Control, Automatic Test Equipment (ATE), Precision Instrumentation, Medical Equipment, Telecommunications.
Military Avionics
The AD664TD-UNI/883B is ideal for military avionics systems that require multiple precise analog outputs for flight control, navigation, and display systems. Its 12-bit resolution and 10 µs settling time ensure accurate and responsive control signals. The military temperature range (-55°C to +125°C) and MIL-STD-883 screening guarantee reliable operation in extreme conditions. The quad DAC architecture allows simultaneous updates of four channels, which is critical for coordinated control surfaces. The parallel interface simplifies integration with mission computers. The device's robustness and long-term availability make it a trusted choice for defense applications.
Recommended
Industrial Process Control
In industrial process control, the AD664TD-UNI/883B provides four independent analog outputs for controlling valves, actuators, and setpoints. Its 12-bit resolution offers fine granularity for precise adjustments, while the 10 µs settling time enables fast response to changing process conditions. The double-buffered latches allow simultaneous updates of all channels, ensuring coordinated control actions. The device's wide operating temperature range makes it suitable for factory floors and outdoor installations. The parallel interface connects easily to PLCs and industrial computers. The reset-to-zero override is useful for safe shutdown procedures. Overall, it enhances system accuracy and reliability in demanding industrial environments.
Recommended
Automatic Test Equipment (ATE)
The AD664TD-UNI/883B is well-suited for automatic test equipment (ATE) that requires multiple stimulus signals. Its four DAC channels can generate test voltages for different DUT pins simultaneously, reducing test time. The 12-bit resolution provides adequate accuracy for many test applications, and the 10 µs settling time allows for fast test sequences. The data readback function enables verification of the programmed values, enhancing test reliability. The military-grade construction ensures long-term stability and repeatability. The parallel interface is compatible with standard test controllers. The device's ability to operate over a wide temperature range makes it suitable for environmental testing chambers.
Recommended
Precision Instrumentation
For precision instrumentation, the AD664TD-UNI/883B offers four accurate analog outputs for calibration, signal generation, and control. Its 12-bit resolution and laser-trimmed thin-film resistors ensure low differential nonlinearity, critical for precise voltage setting. The multiplying operation allows the reference to be varied, enabling programmable gain. The double-buffered latches allow glitch-free updates. The device's low noise and stable performance over temperature make it ideal for laboratory instruments. The parallel interface simplifies connection to microcontrollers. The military screening ensures high reliability for long-term use. This DAC is a solid choice for benchtop instruments and calibration systems.
Recommended
Medical Equipment
The AD664TD-UNI/883B can be used in medical equipment that requires multiple analog outputs, such as patient monitoring systems and diagnostic devices. Its 12-bit resolution provides sufficient precision for many medical signals, and the 10 µs settling time supports real-time control. The quad DAC architecture allows simultaneous generation of multiple waveforms or control voltages. The device's wide temperature range ensures reliable operation in clinical environments. The parallel interface is compatible with medical-grade microcontrollers. The military-grade reliability is beneficial for critical care equipment. However, for new designs, consider more modern DACs with lower power and smaller packages, but the AD664 remains a viable option for legacy systems.
Recommended
Telecommunications
In telecommunications, the AD664TD-UNI/883B can be used for base station control, signal generation, and calibration. Its four DAC channels can set bias voltages, attenuation levels, and frequency tuning signals. The 12-bit resolution provides fine control, and the 10 µs settling time is adequate for many control loops. The double-buffered latches allow synchronized updates across multiple channels, which is important for phased array systems. The device's wide temperature range supports outdoor installations. The parallel interface is compatible with DSPs and FPGAs. The military-grade reliability ensures long-term operation in network infrastructure. For high-speed applications, consider faster DACs, but for control functions, the AD664 is sufficient.
Recommended
Recommended Products Summary
Engineering reference data for AD664TD-UNI/883B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD664TD-UNI | AD664TD-BIP/883B | 5962-8871902MXA | AD664AD-BIP | AD664BJ |
|---|---|---|---|---|---|---|
| Package | 28-CDIP | 28-CDIP | 28-CDIP | 28-CDIP | 28-CDIP | 44-JLCC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Voltage | Voltage | Voltage | Voltage | Voltage | Voltage |
| Interface Type | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Operating Temperature | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -40°C to +85°C | -55°C to +125°C |
Key Differentiators
- Military-grade screening (MIL-STD-883) (vs AD664AD-BIP)
- Unipolar output range (vs AD664TD-BIP/883B)
- 28-pin CDIP package (vs AD664BJ)
Design Notes
Ensure stable power supplies for the AD664TD-UNI/883B. Use separate analog and digital supply pins (VDD and VSS) with adequate decoupling capacitors (0.1 µF and 10 µF) placed close to the pins. The reference voltage (VREF) should be driven by a low-impedance source to maintain accuracy. Consider using a precision reference like the ADR4520 for optimal performance.
For the 28-pin CDIP package, use a PCB layout with a solid ground plane to minimize noise. Separate analog and digital ground planes and connect them at a single point. Keep analog output traces short and shielded from digital signals. Ensure proper thermal relief for through-hole pins to avoid solder joint stress. Follow MIL-STD-883 guidelines for mounting if applicable.
Avoid exceeding the absolute maximum ratings for supply voltages and reference input. The device is not RoHS compliant, so handle with care regarding environmental regulations. When updating multiple DAC channels, use the double-buffered latch feature to update all channels simultaneously to prevent glitches. Verify the output range (unipolar) matches your application; if bipolar is needed, use the BIP version.
Compliance Information
Military-grade component, not RoHS compliant per Xecor data. Lead-free status is no due to RoHS non-compliance.
