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Analog Devices Inc. AD1674TD/883B
- Part No.:
- AD1674TD/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-CDIP (0.600", 15.24mm)
- Datasheet:
-
AD1674TD/883B.pdf
- Description:
- IC ADC 12BIT SAR 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
AD1674TD/883B from Analog Devices is a military-grade, monolithic 12-bit, 100 kSPS analog-to-digital converter with integrated sample-and-hold amplifier (SHA), on-chip ±10 V reference, and 28-pin hermetically sealed ceramic DIP package. It supports unipolar (0 V–10 V, 0 V–20 V) and bipolar (±5 V, ±10 V) input ranges, operates on ±12 V/±15 V analog and +5 V logic supplies, and delivers guaranteed 70 dB S/(N+D) ratio and ±1 LSB integral nonlinearity over –55°C to +125°C.
For engineers reviewing the AD1674TD/883B datasheet, AD1674TD/883B pinout, AD1674TD/883B application, or AD1674TD/883B equivalent, this page provides verified military-spec timing, MIL-STD-883B screening details, full-control and stand-alone mode interface behavior, ac/dc parameter compliance, and precise analog input scaling for high-reliability data acquisition in avionics, missile guidance, and spaceborne telemetry systems.
Technical Context
The AD1674TD/883B implements a successive approximation register (SAR) architecture with an integrated SHA that achieves full Nyquist bandwidth support up to 1 MHz and 500 kHz full-linear bandwidth. Its BiMOS II process integrates bipolar precision analog circuitry-including laser-trimmed scaling resistors and a 10 V reference-with CMOS digital logic for stable dc accuracy and low THD (–90 dB).
It features dual-mode operation: full-control mode using CE/CS/R/C/A0/12/8 signals for multiplexed bus interfacing, and stand-alone mode where R/C edge-triggering initiates conversion with sub-250 ps aperture jitter. The device guarantees no missing codes and supports 8-bit or 12-bit conversion cycles via A0 control, with output formatting configurable as two 8-bit bytes or one 12-bit parallel word.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with monotonic transfer function and no missing codes. |
| Conversion Rate | 100 kSPS - fixed 10 µs conversion time for 12-bit cycle, enabling real-time sampling of signals up to 50 kHz Nyquist bandwidth. |
| S/(N+D) Ratio | 70 dB - measured at 10 kHz input, ensuring ≥11.6 effective bits for high-fidelity signal reconstruction in dynamic applications. |
| Integral Nonlinearity | ±1 LSB - maximum deviation from ideal transfer line, validated across –55°C to +125°C for MIL-STD-883B compliance. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - selectable via BIP OFF and input pin routing, eliminating external scaling networks. |
| Reference Voltage | +10.0 V ±0.1 V - internally generated, buffered REF OUT supports external loads up to 2 mA without degradation. |
| Power Supplies | +5 V (VLOGIC), ±12 V or ±15 V (VCC/VEE) - dual-supply operation enables rail-to-rail analog input handling and noise isolation between analog/digital domains. |
Pinout & Package
AD1674TD/883B is housed in a 28-lead hermetically sealed ceramic DIP (package option D-28), qualified per MIL-STD-883B for high-reliability military and aerospace use. Pin layout follows industry-standard AD574A/AD674A compatibility, enabling drop-in replacement in legacy systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Logic supply input | +5 V ±10% power for internal CMOS logic; decoupling required to suppress digital switching noise coupling into analog section. |
| 12/8 (Pin 2) | Digital configuration input | Set HIGH for 12-bit parallel output format; LOW for two 8-bit byte reads-enables direct interface to 8-bit microprocessors without glue logic. |
| CS (Pin 3) | Chip select input | Active LOW enable for bus arbitration in multi-device systems; must be asserted before CE for valid full-control mode operation. |
| A0 (Pin 4) | Address/control input | LOW initiates 12-bit conversion; HIGH triggers 8-bit cycle; during read, selects MSB or LSB nybble output buffer activation. |
| R/C (Pin 5) | Read/Convert control | Active LOW starts conversion in full-control mode; falling edge triggers conversion in stand-alone mode-critical for minimizing aperture jitter. |
| CE (Pin 6) | Chip enable input | Active HIGH synchronizes all control inputs; must meet 50 ns setup/hold times relative to CS and R/C for reliable timing. |
| VCC (Pin 7) | Analog positive supply | +12 V or +15 V supply for internal DAC, comparator, and SHA-requires low-noise regulation and local bypassing. |
| REF OUT (Pin 8) | Analog reference output | +10.0 V reference source; must be buffered before driving external circuits to prevent conversion error drift during sampling. |
| AGND (Pin 9) | Analog ground | Separate analog return path; must be star-connected to minimize ground bounce coupling into sensitive analog front-end. |
| REF IN (Pin 10) | Reference input | Connected via 50 Ω resistor to REF OUT for internal reference use; open or grounded for external reference configurations. |
| VEE (Pin 11) | Analog negative supply | –12 V or –15 V supply for bipolar operation and SHA biasing-must match VCC magnitude within 0.5 V for optimal linearity. |
| BIP OFF (Pin 12) | Bipolar offset calibration | Connected via 50 Ω to REF OUT for ±5 V/±10 V modes; tied to AGND for 0–10 V/0–20 V unipolar operation. |
| 10 VIN (Pin 13) | 10 V span analog input | Accepts 0–10 V unipolar or ±5 V bipolar signals; left unconnected when using 20 VIN for 20 V range to avoid crosstalk. |
| 20 VIN (Pin 14) | 20 V span analog input | Accepts 0–20 V unipolar or ±10 V bipolar signals; left unconnected when using 10 VIN to preserve input impedance integrity. |
| DGND (Pin 15) | Digital ground | Isolated digital return; connected to system digital ground plane-must be separated from AGND except at single-point tie. |
| DB0–DB3 (Pins 16–19) | Data output (LSB nybble) | Active only when A0 = HIGH and 12/8 = LOW in 8-bit mode; outputs DB3–DB0 with trailing zeros when A0 = HIGH and 12/8 = HIGH. |
| DB4–DB7 (Pins 20–23) | Data output (middle nybble) | Outputs middle 4 bits in 12-bit mode; outputs zeros when A0 = HIGH in 8-bit mode-enables byte-aligned 8-bit bus interfacing. |
| DB8–DB11 (Pins 24–27) | Data output (MSB nybble) | Provides upper 4 bits in 12-bit mode; active when A0 = LOW in 8-bit mode-supports partial-word reads for latency-sensitive applications. |
| STS (Pin 28) | Status output | Active HIGH during conversion; falls LOW 1 µs after data validity-used for interrupt-driven read synchronization without polling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Amplifier | Supports full Nyquist bandwidth (1 MHz) with <250 ps aperture jitter-eliminates need for external SHA and reduces board area/cost in high-speed DAQ systems. |
| MIL-STD-883B Screening | Qualified for Class B (Group A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z) testing including thermal cycling, burn-in, and radiation hardness assurance. |
| Four Calibrated Input Ranges | Laser-trimmed scaling resistors enable ±5 V, ±10 V, 0–10 V, and 0–20 V operation without external components-reducing calibration complexity and improving long-term stability. |
| Flexible Digital Interface | Configurable 8-/12-bit conversion and 8-/12-bit output formatting via A0 and 12/8 pins-allows seamless integration with 8-bit microcontrollers or 16-bit DSPs without level-shifting or latching. |
| DC and AC Parameter Guarantees | Specified and tested for both dc errors (±1 LSB INL, ±6 LSB bipolar offset) and ac performance (70 dB S/(N+D), –90 dB THD)-validates suitability for mixed-signal measurement and spectral analysis. |
Applications
| Avionics Flight Data Acquisition | Missile Guidance Sensor Interface |
|---|---|
Use Scenario: Real-time digitization of inertial measurement unit (IMU) outputs, pitot-static pressure sensors, and engine thermocouples in fighter aircraft flight control computers. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized multi-channel analog telemetry at 100 kSPS with deterministic 10 µs conversion latency and MIL-qualified reliability. Use Value: Guaranteed ±1 LSB INL and 70 dB S/(N+D) over –55°C to +125°C ensures accurate sensor fusion calculations under extreme thermal transients during high-G maneuvers. |
Use Scenario: High-precision conditioning of seeker head RF detector voltages, gyro bias signals, and actuator feedback in tactical missile guidance electronics. IC Role / Device Role / Timing Role: Stand-alone mode R/C-triggered ADC providing sub-250 ps aperture jitter for coherent sampling of fast-rising guidance pulses. Use Value: Integrated SHA and 500 kHz full-linear bandwidth preserve transient fidelity of seeker pulse responses, enabling accurate time-of-arrival estimation in terminal homing phase. |
| Spacecraft Telemetry Conditioning | Nuclear Reactor Monitoring Systems |
Use Scenario: Digitizing radiation-hardened temperature, pressure, and current sensors aboard low-Earth orbit satellites with constrained power and mass budgets. IC Role / Device Role / Timing Role: Dual-supply (±12 V/+5 V) ADC operating in full-control mode for time-multiplexed sensor scanning under command telemetry. Use Value: Hermetic ceramic DIP packaging and MIL-STD-883B Group H (hermeticity) and Group J (radiation) testing ensure 15+ year mission life in Van Allen belt radiation environments. |
Use Scenario: Continuous monitoring of neutron flux detectors, coolant loop thermocouples, and control rod position transducers in Generation III+ nuclear power plant safety systems. IC Role / Device Role / Timing Role: Redundant channel ADC performing periodic self-test conversions with STS-driven interrupt read to verify functional integrity every 100 ms. Use Value: Guaranteed no missing codes and ±1 LSB INL across –55°C to +125°C enable detection of sub-0.1% parameter deviations critical for early fault identification in safety-critical loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1674BD | Same die, –40°C to +85°C industrial grade; ±1/2 LSB INL (vs. ±1 LSB); 70 dB S/(N+D); ceramic DIP package. | Approved for non-military embedded systems requiring extended temperature range but not MIL-STD-883B screening. | Select AD1674BD when full military qualification is unnecessary and tighter INL is preferred for precision instrumentation. |
| AD7892BR-10 | 12-bit, 100 kSPS SAR ADC; ±10 V input; +5 V single supply; 28-lead SOIC; no internal reference; requires external REF. | Designed for commercial/industrial portable equipment; lacks on-chip SHA and reference; lower power (25 mW vs. 575 mW). | Select AD7892BR-10 when system-level power budget is constrained and external reference/SHA are already available. |
Compared with AD1674BD, AD1674TD/883B trades ±0.5 LSB INL for guaranteed operation down to –55°C and full MIL-STD-883B test coverage; compared with AD7892BR-10, it offers higher integration (on-chip SHA + 10 V ref) at the cost of higher power and dual-supply complexity-making it optimal for ruggedized, self-contained DAQ modules.
Availability
AD1674TD/883B is available at Aetrix Electronics and suitable for avionics flight control, missile guidance electronics, spacecraft telemetry, nuclear reactor monitoring, and other high-reliability applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD1674TD/883B 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, founded in 1965 and headquartered in Wilmington, MA.
The AD1674 product line was designed specifically for high-accuracy, high-reliability data acquisition in defense, aerospace, and industrial safety-critical systems-emphasizing MIL-qualified packaging, guaranteed ac/dc specifications, and seamless drop-in compatibility with legacy AD574A-based designs.
FAQ
What is the operating temperature range for AD1674TD/883B?
The AD1674TD/883B is specified for continuous operation from –55°C to +125°C and fully screened per MIL-STD-883B Group I (temperature cycling) and Group M (high-temperature operating life). This range is validated for all dc parameters (including ±1 LSB INL and ±6 LSB bipolar offset) and ac performance (70 dB S/(N+D)) across the full span, making AD1674TD/883B suitable for extreme-environment applications such as jet engine controls and orbital satellite subsystems.
Does AD1674TD/883B require external clock circuitry?
No, AD1674TD/883B contains a fully integrated clock generator and requires no external timing components. The internal clock drives the successive approximation register (SAR) and guarantees consistent 10 µs 12-bit conversion time across –55°C to +125°C. This eliminates clock distribution skew and jitter concerns, directly contributing to the device's guaranteed 250 ps aperture jitter specification and enabling deterministic timing in safety-critical systems.
How does AD1674TD/883B handle bipolar versus unipolar input configurations?
AD1674TD/883B supports both modes via hardware configuration: for bipolar (±5 V or ±10 V), connect BIP OFF to REF OUT through a 50 Ω resistor; for unipolar (0–10 V or 0–20 V), tie BIP OFF to AGND. Input selection is pin-driven-10 VIN used for 10 V spans, 20 VIN for 20 V spans-with unused input left floating. This eliminates software configuration overhead and ensures deterministic analog front-end behavior in certified systems.
Is AD1674TD/883B pin-compatible with AD574A or AD674A?
Yes, AD1674TD/883B uses the identical 28-pin DIP footprint and signal mapping as AD574A and AD674A, enabling direct PCB-level replacement in legacy military systems. However, AD1674TD/883B adds integrated sample-and-hold functionality and faster 10 µs conversion (vs. 25 µs for AD574A), requiring only minor timing adjustments in control firmware-no layout changes or component substitutions are needed for drop-in upgrade.
What power supply configurations are supported by AD1674TD/883B?
AD1674TD/883B operates on three independent supplies: +5 V (VLOGIC, Pin 1), +12 V or +15 V (VCC, Pin 7), and –12 V or –15 V (VEE, Pin 11). Supply tolerances are ±10% for VLOGIC and ±5% for VCC/VEE. The device draws 5 mA (VLOGIC), 10 mA (VCC), and 14 mA (VEE) typical-totaling ~575 mW. Tight regulation and local 0.1 µF + 10 µF bypassing at each supply pin are mandatory to maintain ±1 LSB linearity and 70 dB ac performance.
AD1674TD/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-CDIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 11.4V ~ 16.5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 28-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD1674TD/883B FAQ
1.How can I place an order for AD1674TD/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674TD/883B 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 AD1674TD/883B reliable?
The price and inventory of AD1674TD/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674TD/883B is usually 5 days.
3.What payment methods are accepted for AD1674TD/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674TD/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674TD/883B?
AD1674TD/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674TD/883B 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 AD1674TD/883B?
For technical support, including AD1674TD/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674TD/883B requirements.
6.How does Aetrix verify that AD1674TD/883B is sourced from the original manufacturer or authorized distributors?
All AD1674TD/883B 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 AD1674TD/883B meets industry standards.
7.What is the process for return or replacement of AD1674TD/883B?
All AD1674TD/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD1674TD/883B, 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 AD1674TD/883B part is unused and in its original packaging.
Return procedure for AD1674TD/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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