AD676TD/883B - 16-Bit 100kSPS SAR ADC | Analog Devices
MPN: AD676TD/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 |
AD676TD/883B Overview
An ADC is an electronic component that converts continuous analog signals into discrete digital values. The AD676TD/883B is a specific type of ADC known as a SAR ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are valued for their high resolution, low power consumption, and fast conversion times, making them ideal for applications such as data acquisition systems, industrial process control, and medical instrumentation. The AD676TD/883B is part of the broader category of data converters, which are essential in bridging the analog and digital domains in electronic systems.
Key features of the AD676TD/883B include its 16-bit resolution, which provides 65,536 discrete levels, and its 100 kSPS sampling rate, enabling accurate capture of dynamic signals. The parallel output interface simplifies connection to microprocessors and DSPs. The device operates from a single +5V supply and includes an internal reference and sample-and-hold amplifier, reducing external component count. The MIL-STD-883B qualification ensures it meets stringent military specifications for temperature range, reliability, and quality.
Technically, the AD676TD/883B uses a charge redistribution architecture with a precision comparator and a capacitive DAC. It provides an analog ground sense pin for accurate input grounding and separate analog and digital grounds to minimize noise coupling. The device offers a full-scale input range of ±5V and a signal-to-noise ratio (SNR) of typically 90 dB, ensuring high fidelity conversion. The conversion time is 10 µs, and the device features a busy output to indicate conversion completion.
Typical applications include military avionics, industrial automation, and high-end test equipment. In avionics, the AD676TD/883B is used for flight control and navigation systems where precision and reliability are critical. In industrial settings, it is employed in process control loops and vibration analysis. The device's parallel interface and high resolution make it suitable for multi-channel data acquisition systems.
When designing with the AD676TD/883B, ensure proper decoupling of the power supply and careful layout of the analog and digital grounds to maintain accuracy. The analog input should be driven by a low-impedance source to avoid sampling errors. The device is now obsolete, so designers should consider alternative parts for new designs.
Drop-in alternatives for AD676TD/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:
AD676JD
✅ Drop-In📋 Reference alternative (not in catalog)
AD676JN
⚡ Same Package✓ In Stock
$18.2 / Unit
View Datasheet →AD1674TD/883B
⚡ Same Package✓ In Stock
$58 / Unit
View Datasheet →AD678TD/883B
⚡ Same Package📋 Reference alternative (not in catalog)
AD676TD/883B Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sampling Rate | 100 kSPS |
| Number of Channels | 1 |
| Input Type | Single Ended |
| Interface | Parallel |
| Architecture | SAR |
| Supply Voltage | 5 V |
| Package | 28-CDIP |
| Operating Temperature Range | -55°C to +125°C |
| MIL-STD-883B | Qualified |
| SNR | 90 dB (typical) |
| Conversion Time | 10 µs |
| Input Range | ±5 V |
| RoHS | Non-compliant |
| Lead Free | No |
AD676TD/883B Pin Configuration
| Pin 1 | AGND — Analog ground |
| Pin 2 | AIN — Analog input |
| Pin 3 | AGND_SENSE — Analog ground sense |
| Pin 4 | VREF — Reference voltage output |
| Pin 5 | VCC — Positive supply (+5V) |
| Pin 6 | DGND — Digital ground |
| Pin 7 | BUSY — Busy output (active low) |
| Pin 8 | CS — Chip select (active low) |
| Pin 9 | RD — Read (active low) |
| Pin 10 | DB0 — Data bit 0 (LSB) |
| Pin 11 | DB1 — Data bit 1 |
| Pin 12 | DB2 — Data bit 2 |
| Pin 13 | DB3 — Data bit 3 |
| Pin 14 | DB4 — Data bit 4 |
| Pin 15 | DB5 — Data bit 5 |
| Pin 16 | DB6 — Data bit 6 |
| Pin 17 | DB7 — Data bit 7 |
| Pin 18 | DB8 — Data bit 8 |
| Pin 19 | DB9 — Data bit 9 |
| Pin 20 | DB10 — Data bit 10 |
| Pin 21 | DB11 — Data bit 11 |
| Pin 22 | DB12 — Data bit 12 |
| Pin 23 | DB13 — Data bit 13 |
| Pin 24 | DB14 — Data bit 14 |
| Pin 25 | DB15 — Data bit 15 (MSB) |
| Pin 26 | CONVST — Conversion start (active low) |
| Pin 27 | VLOGIC — Logic supply |
| Pin 28 | DGND — Digital ground |
Typical Applications
AD676TD/883B is suitable for 6 applications: Military Avionics, Industrial Process Control, Test and Measurement Equipment, Medical Instrumentation, Data Acquisition Systems, Aerospace and Defense.
Military Avionics
The AD676TD/883B is ideal for military avionics systems due to its MIL-STD-883B qualification and wide operating temperature range. Its 16-bit resolution and 100 kSPS sampling rate enable precise digitization of sensor signals for flight control and navigation. The parallel interface simplifies integration with mission computers, while the ceramic package ensures reliability in harsh environments. Designers can use the internal reference and sample-and-hold to reduce external components, saving board space in space-constrained avionics modules.
Recommended
Industrial Process Control
In industrial process control, the AD676TD/883B provides high-resolution conversion for monitoring and control loops. Its 16-bit resolution allows precise measurement of analog signals from sensors such as pressure transducers and temperature probes. The 100 kSPS sampling rate is sufficient for real-time control applications. The parallel interface enables fast data transfer to PLCs or microcontrollers. The device's robust construction and wide temperature range make it suitable for factory floor environments where reliability is paramount.
Recommended
Test and Measurement Equipment
The AD676TD/883B is well-suited for test and measurement equipment such as digital multimeters and data acquisition systems. Its 16-bit resolution and 100 kSPS sampling rate allow accurate capture of dynamic signals. The parallel interface facilitates high-speed data transfer to processors for analysis. The device's low noise performance (90 dB SNR) ensures measurement accuracy. The ceramic package provides stable performance over temperature, making it reliable for benchtop and portable instruments.
Recommended
Medical Instrumentation
The AD676TD/883B can be used in medical instrumentation such as patient monitoring systems and diagnostic equipment. Its high resolution and accuracy are essential for capturing physiological signals like ECG and EEG. The 100 kSPS sampling rate is adequate for most biomedical signals. The parallel interface allows easy connection to digital signal processors for real-time analysis. The device's reliability and wide temperature range make it suitable for medical devices that must operate consistently.
Recommended
Data Acquisition Systems
The AD676TD/883B is a fundamental building block for data acquisition systems (DAQ) used in research and industrial applications. Its 16-bit resolution and 100 kSPS sampling rate enable accurate digitization of analog signals from various sensors. The parallel interface simplifies connection to microcontrollers or FPGAs. The device's internal reference and sample-and-hold reduce external component count, making it easy to design compact DAQ modules. The MIL-STD-883B qualification ensures reliability in demanding environments.
Recommended
Aerospace and Defense
The AD676TD/883B is designed for aerospace and defense applications where reliability and precision are critical. Its MIL-STD-883B qualification ensures it meets military standards for temperature, shock, and vibration. The 16-bit resolution and 100 kSPS sampling rate are suitable for radar, electronic warfare, and guidance systems. The parallel interface allows high-speed data transfer to processing units. The ceramic package provides excellent thermal performance, making it ideal for harsh environments.
Recommended
Recommended Products Summary
Engineering reference data for AD676TD/883B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD676JD | AD676JN | AD677TD/883B |
|---|---|---|---|---|
| Package | 28-CDIP | 28-CDIP | 28-PDIP | 16-CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Interface | Parallel | Parallel | Parallel | Serial |
| Temperature Range | -55°C to +125°C | 0°C to +70°C | 0°C to +70°C | -55°C to +125°C |
| MIL-STD-883B | Qualified | Not qualified | Not qualified | Qualified |
| RoHS | Non-compliant | Non-compliant | Non-compliant | Non-compliant |
Key Differentiators
- MIL-STD-883B qualification (vs AD676JD)
- Ceramic package (vs AD676JN)
- Parallel interface (vs AD677TD/883B)
Design Notes
The AD676TD/883B requires a single +5V supply. Use a low-noise linear regulator to power the device, and place a 10µF tantalum capacitor and a 0.1µF ceramic capacitor close to the VCC pin to decouple high-frequency noise. The VLOGIC pin should be connected to the digital supply voltage (e.g., 3.3V or 5V) and decoupled with a 0.1µF capacitor.
For optimal performance, separate analog and digital ground planes and connect them at a single point near the device. Route the analog input away from digital traces to minimize noise coupling. Use a ground plane under the device to provide a low-impedance return path. Place the reference decoupling capacitor (10µF) close to the VREF pin.
Ensure the analog input is driven by a low-impedance source to avoid sampling errors. The input range is ±5V; exceeding this range can damage the device. Do not leave the CONVST pin floating; tie it high or low as needed. The device is obsolete, so verify availability before designing it into new products.
Compliance Information
The AD676TD/883B is a military-grade part manufactured before RoHS regulations, so it contains lead and is not RoHS compliant.