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Analog Devices Inc. AD679SD/883B
- Part No.:
- AD679SD/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-CDIP (0.605", 15.37mm)
- Datasheet:
-
AD679SD/883B.pdf
- Description:
- 14-BIT FLASH ADC
- Quantity:
- Payment:
- Shipping:
Inventory:248
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Product details
Overview
AD679SD/883B from Analog Devices is a 14-bit, 128 kSPS monolithic sampling ADC with integrated sample-and-hold amplifier, on-chip 5 V reference, clock generator, and 8-bit bus interface. It delivers 78 dB S/N+D (typ), 1 MHz full-power bandwidth, and 10 MΩ input impedance, enabling direct connection to unbuffered sources in precision test instrumentation and military-grade data acquisition systems.
For engineers reviewing the AD679SD/883B datasheet, AD679SD/883B pinout, AD679SD/883B application, or AD679SD/883B equivalent, key selection considerations include MIL-STD-883B screening compliance, –55°C to +125°C operating range, bipolar/unipolar mode support, two-read 14-bit output timing, and BiMOS process reliability for high-accuracy analog-to-digital conversion under extreme environmental stress.
Technical Context
The AD679SD/883B implements a recursive subranging architecture with flash converter circuitry and error correction to achieve 14-bit resolution at 128 kSPS. Its sample-and-hold amplifier provides 1.5 µs input settling time and 150 ps aperture jitter, supporting undersampling of signals beyond Nyquist frequency while maintaining linearity.
It operates from ±12 V analog supplies and +5 V digital supply, dissipating 560 mW (typ). The device supports synchronous and asynchronous conversion control via SYNC, CS, SC, and EOCEN pins, with three-state DB7–DB0 outputs and left-justified 8+6 bit read sequencing controlled by HBE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees 1 LSB = 0.61 mV for 10 V full-scale range, enabling precise measurement of sub-millivolt signal changes. |
| Sampling Rate | 128 kSPS - supports real-time capture of signals up to 500 kHz linear bandwidth without aliasing-induced distortion. |
| S/N+D Ratio | 78 dB (typ) at –0.5 dB input - ensures >78 dB dynamic range for clean digitization of low-amplitude signals in noisy environments. |
| Input Range | ±5 V bipolar or 0–10 V unipolar - configurable via BIPOFF pin, eliminating external level-shifting circuitry in mixed-signal systems. |
| Input Impedance | 10 MΩ - allows direct interfacing with high-impedance sensors or multiplexers without loading or gain error. |
| Reference Output | 4.98–5.02 V - laser-trimmed internal voltage reference enables stable full-scale calibration without external components. |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B, suitable for aerospace, defense, and downhole industrial applications. |
Pinout & Package
AD679SD/883B is supplied in a 28-lead ceramic DIP package (D-28), screened to MIL-STD-883B requirements. Pin assignments are identical to standard AD679SD, with all unused pins tied to DGND or VDD as specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN | Analog Input | High-impedance (10 MΩ) node accepting ±5 V or 0–10 V signals directly; no external buffer required. |
| BIPOFF | Mode Configuration | Tie to AGND for unipolar mode (straight binary); tie to REFOUT for bipolar mode (twos complement). |
| REFOUT | Analog Output | 5 V reference output (4.98–5.02 V) used for biasing BIPOFF and external circuitry; load-limited to 1.5 mA (unipolar). |
| SC | Digital Input | Active-low start-convert trigger; must be pulsed (not held low) to avoid accuracy degradation. |
| EOC | Digital Output | Open-drain in asynchronous mode (requires 3 kΩ pull-up); three-state in synchronous mode; indicates conversion completion. |
| HBE | Digital Input | Selects high-byte (LOW) or low-byte (HIGH) output on DB7–DB0 during two-read 14-bit data access. |
| DGND / AGND | Power Ground | Separate digital and analog ground pins prevent noise coupling between logic switching and analog signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Complete integration | On-chip SHA, reference, clock, and bus interface eliminate 5+ external components versus discrete ADC designs. |
| MIL-STD-883B compliance | Screened for mechanical shock, temperature cycling, and hermeticity-certified for mission-critical defense platforms. |
| Factory laser trimming | Eliminates need for user calibration; achieves ≤2.5 LSB INL and ≤0.12% FSR gain error over full temperature range. |
| Bipolar/unipolar dual-mode operation | Single hardware configuration supports both signed and unsigned data formats via BIPOFF pin routing. |
| BiMOS process technology | Combines CMOS logic density with bipolar precision-ensures long-term stability and low thermal drift vs. hybrid alternatives. |
Applications
| Test & Measurement Equipment | Military Avionics Data Acquisition |
|---|---|
Use Scenario: High-accuracy voltage logging in automated test systems capturing transient waveforms from sensor arrays. IC Role / Device Role / Timing Role: Primary sampling ADC performing synchronized 128 kSPS conversions with deterministic latency and minimal aperture jitter. Use Value: 78 dB S/N+D and 500 kHz linear bandwidth ensure fidelity of captured signals without post-processing correction. |
Use Scenario: Real-time engine monitoring in fighter jet flight control units operating across –55°C to +125°C ambient. IC Role / Device Role / Timing Role: Ruggedized A/D converter interfacing with analog transducers under vibration, EMI, and thermal stress. Use Value: MIL-STD-883B qualification and BiMOS reliability guarantee uninterrupted operation in safety-critical subsystems. |
| Downhole Oilfield Instrumentation | Radar Signal Digitization |
Use Scenario: Pressure and temperature telemetry in deep-well drilling tools exposed to extreme heat and pressure. IC Role / Device Role / Timing Role: Precision ADC converting conditioned analog outputs from piezoresistive sensors in sealed modules. Use Value: 10 MΩ input impedance prevents signal attenuation from high-source-impedance sensors; wide temp range avoids derating. |
Use Scenario: Intermediate-frequency sampling in ground-based radar receivers digitizing 10–50 MHz IF signals. IC Role / Device Role / Timing Role: Undersampling ADC leveraging 1 MHz full-power bandwidth to capture bandpass signals above Nyquist. Use Value: Full-linear bandwidth of 500 kHz and low THD (–90 dB) preserve spectral integrity for pulse-Doppler processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD678SD/883B | 12-bit resolution, 200 kSPS, same 28-pin DIP footprint and pinout. | Lower resolution but higher speed; suited for applications prioritizing throughput over dynamic range. | Choose when system SNR budget permits <70 dB and sampling rate >150 kSPS is required. |
| ADS8505IPFB | 16-bit, 250 kSPS, SPI interface, single +5 V supply, no internal reference. | Higher resolution and speed but requires external reference, clock, and level-shifting; not MIL-qualified. | Choose for commercial industrial systems needing enhanced resolution without military screening. |
Compared with AD679SD/883B, AD678SD/883B trades 2 bits of resolution for 56% higher sampling rate in identical packaging, while ADS8505IPFB offers 2 extra bits and faster throughput but lacks integrated reference, clock, and MIL-STD-883B assurance-requiring additional design validation for harsh environments.
Availability
AD679SD/883B is available at Aetrix Electronics and suitable for test instrumentation, military avionics, and downhole oilfield equipment requiring stable component supply under extended temperature and reliability constraints.
Supply support for AD679SD/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, headquartered in Norwood, MA.
The AD679 product line delivers fully integrated, high-accuracy sampling ADCs for demanding measurement, defense, and industrial applications where reliability, linearity, and environmental robustness are critical.
FAQ
What is the operating temperature range of the AD679SD/883B?
The AD679SD/883B is rated for –55°C to +125°C operation and is screened per MIL-STD-883B, including temperature cycling and hermeticity tests. This range is validated for continuous operation in aerospace, defense, and oilfield applications where thermal extremes are routine. The AD679SD/883B maintains specified DC accuracy and AC performance across this full span without derating.
Does the AD679SD/883B require external calibration components?
No-AD679SD/883B is factory laser-trimmed for offset, gain, and linearity, eliminating mandatory external trims. In unipolar mode, only a single 50 Ω 1% resistor is needed; bipolar mode adds one more trim resistor. For non-critical AC applications, even these may be omitted. The AD679SD/883B achieves ≤2.5 LSB INL and ≤0.12% FSR gain error without user intervention.
How does the AD679SD/883B handle bipolar versus unipolar input ranges?
The AD679SD/883B selects input mode via the BIPOFF pin: tie to AGND for 0–10 V unipolar input with straight binary coding; tie to REFOUT for ±5 V bipolar input with twos complement coding. Internal circuitry scales the reference accordingly, and the 14-bit result remains left-justified across both modes. The AD679SD/883B supports seamless reconfiguration without changing external hardware.
What power supplies does the AD679SD/883B require?
The AD679SD/883B requires three independent supplies: +12 V (VCC), –12 V (VEE), and +5 V (VDD). Typical current draw is 18 mA (ICC), 25 mA (IEE), and 8 mA (IDD), totaling ~560 mW. Power supply rejection is specified at 6 LSB for ±5% variation on each rail. The AD679SD/883B is not designed for 15 V operation-exceeding ±12 V risks permanent damage per absolute maximum ratings.
Is the AD679SD/883B pin-compatible with other members of the AD67x family?
Yes-the AD679SD/883B shares identical pinout and footprint with AD678SD/883B (12-bit, 200 kSPS), enabling drop-in upgrades in existing 28-lead ceramic DIP layouts. All control, data, reference, and power pins align exactly. However, timing parameters differ: AD679SD/883B has longer conversion time (6.3 µs vs. ~5 µs) and different EOC behavior in asynchronous mode, requiring firmware review before substitution.
AD679SD/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-CDIP (0.605", 15.37mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 128k
- Number of Inputs:
- -
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V, ±11.4V ~ 12.6V
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V, ±11.4V ~ 12.6V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 28-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD679SD/883B FAQ
1.How can I place an order for AD679SD/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD679SD/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 AD679SD/883B reliable?
The price and inventory of AD679SD/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD679SD/883B is usually 5 days.
3.What payment methods are accepted for AD679SD/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD679SD/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD679SD/883B?
AD679SD/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD679SD/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 AD679SD/883B?
For technical support, including AD679SD/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD679SD/883B requirements.
6.How does Aetrix verify that AD679SD/883B is sourced from the original manufacturer or authorized distributors?
All AD679SD/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 AD679SD/883B meets industry standards.
7.What is the process for return or replacement of AD679SD/883B?
All AD679SD/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD679SD/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 AD679SD/883B part is unused and in its original packaging.
Return procedure for AD679SD/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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