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Analog Devices Inc. AD678TD/883B
- Part No.:
- AD678TD/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD678TD/883B.pdf
- Description:
- IC ADC 12BIT 200KSPS 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:119
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Product details
Overview
AD678TD/883B from Analog Devices is a military-grade, 12-bit, 200 kSPS monolithic sampling analog-to-digital converter with integrated sample-hold amplifier, on-chip 5 V reference, clock generation, and dual-mode (8-bit/12-bit) parallel bus interface. It delivers 72 dB S/N+D, 1 MHz full-power bandwidth, and ±1 LSB integral nonlinearity over –55°C to +125°C, enabling precision data acquisition in avionics and ruggedized instrumentation.
For engineers reviewing the AD678TD/883B datasheet, AD678TD/883B pinout, AD678TD/883B application, or AD678TD/883B equivalent, this page provides verified technical context, MIL-STD-883B-compliant package mapping, validated timing parameters (tC = 3.0–4.4 µs, tCR = 5 µs), bipolar/unipolar mode behavior, and real-world calibration guidance for high-reliability embedded systems.
Technical Context
The AD678TD/883B implements a recursive subranging architecture combining flash converter stages with error correction logic to achieve 12-bit resolution at 200 kSPS. Its sample-hold amplifier features 10 MΩ input impedance, 1 µs settling time, and 150 ps aperture jitter-enabling direct connection to high-impedance sensors without buffering.
It supports two digital interface modes: 12-bit parallel output (DB11–DB0) via single read cycle, or 8-bit multiplexed output (DB11–DB4 only) with R/L and HBE control for right/left justification. Bipolar mode uses twos complement coding with BIPOFF tied to REFOUT; unipolar mode uses straight binary with BIPOFF grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - defines smallest detectable voltage step (2.44 mV in 10 V range) |
| Sampling Rate | 200 kSPS - enables real-time capture of signals up to 100 kHz Nyquist frequency |
| S/N+D Ratio | 72 dB (K/B/T grades) - ensures ≥11.6 effective bits for low-noise signal processing |
| Full-Power Bandwidth | 1 MHz - supports accurate digitization of fast transients without amplitude loss |
| Input Range | ±5 V bipolar or 0–10 V unipolar - matches standard industrial sensor outputs |
| Reference Output | 4.98–5.02 V - stable on-chip 5 V reference eliminates external voltage reference IC |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B Class B for extended military use |
Pinout & Package
AD678TD/883B is supplied in a 28-lead ceramic DIP (package option D-28), screened to MIL-STD-883B Class B, with hermetic sealing and temperature cycling validation for aerospace deployment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN | Analog Input | High-impedance (10 MΩ) node accepting ±5 V or 0–10 V signals directly |
| BIPOFF | Bipolar Offset Control | Configures coding mode: grounded → unipolar/straight binary; tied to REFOUT → bipolar/twos complement |
| CS, SC, OE, EOCEN, SYNC | Digital Control Inputs | Enable synchronous/asynchronous conversion control, output gating, and status signaling |
| DB11–DB0 | Data Outputs | Three-state TTL/CMOS-compatible outputs supporting 12-bit parallel or 8-bit multiplexed bus interfacing |
| VCC, VEE, VDD | Power Supplies | +12 V (analog), –12 V (analog), +5 V (digital) - decoupling critical for noise immunity |
| AGND, DGND | Ground Returns | Separate analog/digital grounds minimize coupling; AGND carries only 200 µA code-independent current |
Key Features
| Feature | Design Value |
|---|---|
| Complete Sampling ADC Integration | On-chip SHA, 12-bit ADC, 5 V reference, clock generator, and bus interface eliminate ≥7 external components |
| MIL-STD-883B Screening | Class B testing includes temperature cycling, mechanical shock, vibration, and burn-in - certified for flight-critical subsystems |
| Dual Bus Interface Flexibility | Supports legacy 8-bit microcontrollers (two-cycle read) and modern 16-bit processors (single-cycle 12-bit read) |
| Factory Laser Trimming | INL ≤ ±0.7 LSB, gain error ≤ ±3 LSB, zero error ≤ ±3 LSB - no field calibration required for most applications |
| Robust Input Architecture | 10 MΩ input resistance + 10 pF capacitance + 1 µs settling enables direct multiplexer channel switching without hold capacitor |
Applications
| Avionics Data Acquisition | Missile Guidance Sensor Interface |
|---|---|
Use Scenario: Digitizing inertial measurement unit (IMU) analog outputs under high-G vibration and wide thermal excursions. IC Role / Device Role / Timing Role: Precision sampling ADC performing synchronized 200 kSPS conversions with <5 ns aperture delay variation across –55°C to +125°C. Use Value: Eliminates need for external reference and clock ICs while maintaining 72 dB SNR in EMI-heavy environments. |
Use Scenario: Capturing seeker head RF detector voltages during terminal phase maneuvering with minimal latency. IC Role / Device Role / Timing Role: High-speed, low-jitter ADC providing deterministic 5 µs conversion interval for closed-loop control timing. Use Value: 150 ps aperture jitter ensures sub-LSB phase error in Doppler tracking loops. |
| Ruggedized Test Equipment | Nuclear Plant Monitoring |
Use Scenario: Portable field diagnostic tool measuring turbine vibration spectra in oil-and-gas refineries. IC Role / Device Role / Timing Role: Standalone ADC interfaced to 8-bit microcontroller via multiplexed 8-bit bus (12/8 = LOW, R/L = DGND). Use Value: Right-justified 12-bit output reduces firmware overhead; 10 MΩ input allows direct piezoelectric sensor connection. |
Use Scenario: Continuous monitoring of reactor coolant temperature and pressure transducers in safety-critical I&C systems. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-STD-883B) ADC operating continuously at +125°C ambient with guaranteed INL ≤ ±1 LSB. Use Value: Factory-trimmed offset/gain stability eliminates recalibration cycles during 18-month refueling outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD679TD/883B | 14-bit resolution, 128 kSPS, identical D-28 pinout but slower throughput and higher power (850 mW) | Used where DC accuracy > dynamic performance (e.g., precision thermocouple digitization) | Select AD679TD/883B only when 14-bit resolution is mandatory and 200 kSPS is not required. |
| ADS8505IPFBT | 16-bit, 250 kSPS, SPI interface, single +5 V supply, no internal reference - requires external REF5025 and clock | Preferred for new designs needing higher resolution and lower power (125 mW), but adds BOM complexity | Choose ADS8505IPFBT for greenfield designs prioritizing resolution and integration density over legacy bus compatibility. |
Compared with AD678TD/883B, AD679TD/883B trades speed for resolution and shares footprint for drop-in upgrades, while ADS8505IPFBT offers superior specs but demands redesign for serial interface and external support circuitry-making AD678TD/883B optimal for MIL-DTL-38534-compliant retrofits.
Availability
AD678TD/883B is available at Aetrix Electronics and suitable for avionics data acquisition, missile guidance sensor interface, ruggedized test equipment, nuclear plant monitoring, and other high-reliability applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD678TD/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 AD678 product line was engineered for military and aerospace data acquisition systems requiring fully characterized AC/DC performance, MIL-STD-883 qualification, and complete signal-chain integration in a single monolithic IC.
FAQ
What is the maximum sampling rate supported by the AD678TD/883B?
The AD678TD/883B supports a maximum sampling rate of 200 kSPS, with a minimum conversion interval (tCR) of 5 µs. This rate is guaranteed across its full military temperature range (–55°C to +125°C) and is enforced by internal timing logic that prevents SC pulses closer than 5 µs-ensuring consistent 12-bit accuracy without degradation.
How does the AD678TD/883B handle bipolar versus unipolar input configurations?
The AD678TD/883B selects input mode via the BIPOFF pin: grounding BIPOFF configures unipolar 0–10 V input with straight binary output; connecting BIPOFF to REFOUT through a 50 Ω resistor enables ±5 V bipolar input with twos complement output. The internal reference and gain stage are auto-configured-no register writes or external component changes are needed beyond the BIPOFF connection.
Is the AD678TD/883B pin-compatible with any other Analog Devices ADCs?
Yes-the AD678TD/883B shares the identical 28-lead ceramic DIP (D-28) pinout with the AD679 series, including AD679TD/883B. This allows direct PCB-level replacement where 12-bit resolution and 200 kSPS throughput meet system requirements, though AD679 variants offer 14-bit resolution at reduced speed (128 kSPS) and higher power consumption.
What decoupling is required for stable operation of the AD678TD/883B?
Each power supply pin (VCC, VEE, VDD) requires local decoupling: a 10 µF tantalum capacitor in parallel with a 0.1 µF ceramic capacitor, placed within 5 mm of the pin and connected directly to AGND (for VCC/VEE) or DGND (for VDD). This configuration suppresses high-frequency noise and prevents supply-induced INL errors exceeding ±2 LSB, as specified in the power supply rejection test conditions.
Does the AD678TD/883B require external calibration for MIL-STD-883B compliance?
No-AD678TD/883B is factory laser-trimmed and fully tested per MIL-STD-883B Class B, with guaranteed DC specifications including ±0.7 LSB INL, ±3 LSB gain error, and ±3 LSB zero error across –55°C to +125°C. External trimming resistors (R1/R2) are optional and only needed if application-specific accuracy tighter than these limits is required.
AD678TD/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
AD678TD/883B FAQ
1.How can I place an order for AD678TD/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD678TD/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 AD678TD/883B reliable?
The price and inventory of AD678TD/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD678TD/883B is usually 5 days.
3.What payment methods are accepted for AD678TD/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD678TD/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD678TD/883B?
AD678TD/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD678TD/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 AD678TD/883B?
For technical support, including AD678TD/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD678TD/883B requirements.
6.How does Aetrix verify that AD678TD/883B is sourced from the original manufacturer or authorized distributors?
All AD678TD/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 AD678TD/883B meets industry standards.
7.What is the process for return or replacement of AD678TD/883B?
All AD678TD/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD678TD/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 AD678TD/883B part is unused and in its original packaging.
Return procedure for AD678TD/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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