ADI 5962-93164 01MXA(AD1674TD/883B)
- Complete 12-bit 100 kSPS ADC with user-transparent on-board sample-and-hold amplifier (SHA)
- Fully specified for both AC parameters (SNR, THD, IMD) and DC parameters over the military temperature range
- Pin-compatible with industry-standard AD574A and AD674A — direct drop-in upgrade with sampling capability
- Four pin-selectable input ranges: 0V to +10V, 0V to +20V unipolar, ±5V and ±10V bipolar
- Direct 8-bit and 16-bit microprocessor bus interface with on-chip clock and 3-state output buffers
The ADI AD1674TD/883B answers a specific limitation of the AD574A that military system designers have worked around for years: the absence of an on-board sample-and-hold amplifier. Where the AD574A requires an external SHA to accurately digitize signals that change during the conversion interval, the AD1674 integrates that function transparently on the same die — no external SHA component, no additional board area, no wait states for SHA acquisition. The result is a 12-bit, 100 kSPS ADC that handles dynamic input signals correctly without modifying the surrounding circuit design. It is fully pin-compatible with the AD574A and AD674A, making it a direct drop-in upgrade for existing military board designs that need sampling capability.
What sets the AD1674 apart from its predecessors is dual specification coverage. Most military ADCs are characterized for DC parameters — offset, linearity, gain error — but the AD1674 is fully specified and production-tested for AC parameters as well: total harmonic distortion, signal-to-noise-plus-distortion ratio, and intermodulation distortion, measured across the full Nyquist bandwidth of the converter. This dual coverage reflects the BiMOS II architecture's ability to combine high-performance bipolar analog circuitry with CMOS digital logic on the same substrate, delivering an ADC that is equally at home in precision DC measurement and dynamic signal processing applications. Processed to MIL-STD-883B and available under SMD 5962-93164, the AD1674TD/883B brings these capabilities into the DoD qualified parts framework for military procurement.
Related Products For Your Business
The AD1674 occupies a well-defined position in the military ADC landscape: it is the AD574A with the one capability that makes it usable for dynamic signal applications — an integrated sample-and-hold amplifier — while maintaining full pin compatibility with the AD574A footprint. For programs already using the 5962R8512702VXA AD574ATD/QMLR or standard AD574A variants, the AD1674TD/883B is a direct board-level upgrade that adds SHA capability without PCB redesign. For new designs where both DC precision and AC dynamic performance must be guaranteed under MIL-STD-883B, it is the natural starting point.
AD1674TD/883B Architecture: Transparent SHA and Dual AC/DC Specification
The SHA integration in the AD1674 is designed to be invisible to the system designer — no acquisition wait states, no explicit SHA control signals, no timing adjustments needed relative to the AD574A interface. The on-chip SHA captures the analog input at the start of each conversion cycle and holds it stable for the duration of the SAR conversion, supporting 12-bit accuracy across the full Nyquist bandwidth. Because this happens internally, firmware and interface logic written for the AD574A works on the AD1674 without modification. The AC specifications — S/(N+D), THD, IMD — are production-tested values that reflect what the device actually delivers in dynamic applications, not post-hoc characterization data.
AD1674TD/883B vs AD574ATD: Choosing Between the Two Military Standards
The most common selection decision involving the AD1674 is whether to use it or the AD574A in a new military design. The comparison is straightforward:
| AD1674TD/883B | 5962R8512702VXA (AD574ATD/QMLR) | |
|---|---|---|
| Resolution | 12-bit | 12-bit |
| On-Board SHA | Yes — transparent | No |
| AC Specifications | SNR, THD, IMD guaranteed | Not specified |
| Conversion Time | 10 µs | 35 µs |
| Throughput | 100 kSPS | ~25 kSPS |
| Qualification | MIL-STD-883B | QMLR QPL RHA |
| Radiation Hardness | Standard 883B | QPL RHA (R prefix) |
| Pin Compatibility | AD574A / AD674A | Industry standard |
| Best For | Dynamic signals, AC+DC apps | Space / RHA programs, DC precision |
For applications involving dynamic signals — sensor outputs that change between samples, audio-band processing, or any measurement where aliasing from aperture error matters — the AD1674’s on-board SHA is the deciding factor. For applications requiring QPL radiation hardness assurance, the AD574ATD/QMLR under 5962R remains the qualified path.
Sourcing the ADI AD1674TD/883B
The AD1674TD/883B in its hermetic ceramic DIP package is an active specification component in military signal processing and avionics programs where AC and DC performance must both be guaranteed under MIL-STD-883B screening. We carry verified inventory with full lot traceability, certificate of conformance, and anti-counterfeit inspection on every order. Contact us today to confirm availability and request a quote — our team responds within 24 hours.
- Drop-in upgrade from AD574A and AD674A — identical 28-lead pinout, no PCB changes required
- Transparent SHA eliminates the external sample-and-hold component in dynamic signal applications
- Production-tested AC specifications confirm real-world dynamic performance, not just DC accuracy
- 10 µs conversion time is 3.5× faster than the AD574A — enables higher throughput in scanning systems
- On-chip 10V laser-trimmed reference available at REF OUT for use by other signal chain components
- Byte mode supports 8-bit processor buses without external demultiplexing logic
- Full lot traceability and MIL-STD-883B certificate of conformance on every order
Frequently Asked Questions (FAQ)
What Is the ADI AD1674TD/883B and How Does It Differ From the AD574A?
The AD1674TD/883B is a complete 12-bit 100 kSPS ADC processed to MIL-STD-883B, with an integrated transparent sample-and-hold amplifier, 10V on-chip reference, clock, and 3-state output buffers in a 28-lead hermetic ceramic DIP. It is pin-compatible with the AD574A but adds on-board SHA capability, 3.5× faster conversion, and full AC parameter specification — SNR, THD, and IMD — that the AD574A does not provide.
What Does “User-Transparent SHA” Mean in Practice?
Transparent means the sample-and-hold acquisition phase completes automatically at the start of each conversion cycle without any external control signal or firmware wait state. From the processor’s perspective, the AD1674 behaves exactly like a non-sampling ADC — issue a convert command, wait for STS to go low, read the data. The SHA captures and holds the input internally, eliminating aperture error in dynamic signal applications without changing the software interface.
Is the AD1674TD/883B Pin-Compatible With the AD574A?
Yes. The AD1674 was designed with the AD574A and AD674A pinout as its standard, and the 28-lead hermetic ceramic DIP package is directly pin-compatible with both predecessors. Existing military board designs using the AD574A can substitute the AD1674TD/883B without PCB modification to gain on-board SHA capability and faster conversion time.
When Should I Choose the AD1674 Over the AD574A for a New Military Design?
Choose the AD1674TD/883B when the input signals change between samples, when AC performance must be guaranteed under MIL-STD-883B screening, or when conversion throughput above approximately 25 kSPS is required. Choose the 5962R8512702VXA AD574ATD/QMLR when the procurement specification requires QPL radiation hardness assurance or QMLR qualification that standard 883B screening does not provide.
How Do I Request a Quote for the ADI AD1674TD/883B?
Submit an inquiry through our website contact form or email our sales team directly. We will respond within 24 hours with pricing, availability, and lead time — and can discuss long-term supply agreements for production programs.