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Analog Devices Inc. AD670SE/883B
- Part No.:
- AD670SE/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
AD670SE/883B.pdf
- Description:
- IC ADC 8BIT SIGNAL COND 20CLCC
- Quantity:
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Inventory:4,892
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Product details
Overview
AD670SE/883B from Analog Devices is a complete 8-bit signal conditioning analog-to-digital converter with integrated instrumentation amplifier, precision voltage reference, DAC, SAR architecture, and three-state microprocessor bus interface. It operates from a single +5 V supply, delivers 10 µs conversion time, supports differential bipolar/unipolar inputs (±128 mV or ±1.28 V ranges), and guarantees no missing codes over –55°C to +125°C. It is used in high-reliability transducer interfaces for aerospace and defense data acquisition systems.
For engineers reviewing the AD670SE/883B datasheet, AD670SE/883B pinout, AD670SE/883B application, or AD670SE/883B equivalent, key selection considerations include MIL-STD-883B screening compliance, guaranteed no missing codes across military temperature range, differential input common-mode rejection >1 LSB, unipolar/bipolar format flexibility via BPO/UPO and FORMAT pins, and direct 8-bit bus compatibility without external trims or support components.
Technical Context
The AD670SE/883B implements a dynamic successive approximation register (SAR) using an inverter-chain delay-line architecture-no external clock required-enabling deterministic 10 µs conversion timing. Its front-end instrumentation amplifier provides high-impedance differential inputs with laser-trimmed thin-film SiCr resistors ensuring ±1/2 LSB relative accuracy and stable gain/offset over temperature.
Control logic responds to R/W, CE, and CS signals to initiate conversion or enable three-state digital outputs; STATUS pin indicates active conversion. Input scaling is set by internal 10:1 attenuators, and output coding (straight binary or 2's complement) is selected dynamically at conversion start via FORMAT and BPO/UPO pins-supporting four distinct input/output configurations per Table I.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit-provides 256 discrete output levels for digitizing analog sensor signals with sufficient granularity for industrial and military transducer applications. |
| Conversion Time | 10 µs-enables up to 100 kSPS sampling rate, suitable for medium-speed data acquisition without external sample-and-hold circuitry. |
| Input Ranges | Differential ±128 mV (1 mV/LSB) or ±1.28 V (10 mV/LSB)-supports direct connection to low-level bridge sensors (e.g., strain gages, RTDs) and higher-level transducers without external gain stages. |
| Relative Accuracy | ±1/2 LSB (typ.)-ensures monotonic transfer function and eliminates code ambiguities critical for closed-loop control and calibration-sensitive measurement. |
| Supply Voltage | +4.75 V to +5.5 V-allows operation from standard TTL/CMOS logic rails, eliminating need for dedicated analog supplies in embedded systems. |
| Operating Temperature | –55°C to +125°C-qualified per MIL-STD-883B, enabling use in avionics, missile guidance, and downhole instrumentation where thermal stability is mission-critical. |
| Common-Mode Rejection | ≥1 LSB (both ranges)-preserves signal integrity when digitizing small differential voltages superimposed on large common-mode noise (e.g., motor drive feedback, ground-loop-prone environments). |
Pinout & Package
AD670SE/883B is supplied in a 20-pin ceramic dual-in-line package (CERDIP), hermetically sealed and screened to MIL-STD-883B requirements for reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1–9 | Digital Outputs (D0–D7, STATUS) | Three-state CMOS-compatible outputs; D0–D7 deliver 8-bit conversion result; STATUS goes high during conversion and low upon completion-enables synchronous read timing without polling. |
| Pins 11–15 | Digital Inputs (R/W, CS, CE, BPO/UPO, FORMAT) | R/W controls read/write mode; CS/CE are interchangeable chip-select enables; BPO/UPO selects bipolar/unipolar input; FORMAT selects output coding-fully software-configurable per conversion. |
| Pins 16–19 | Analog Inputs (–VIN, +VIN, REF IN, REF OUT) | Differential input pair (–VIN/+VIN) accepts transducer signals; REF IN/OUT allow optional external reference override or monitoring of internal 2.5 V reference. |
| Pins 10, 20 | Power (VCC, GND) | Single +5 V supply and ground-no separate analog/digital rails required; internal regulation and decoupling minimize layout complexity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated instrumentation amplifier front end | Eliminates need for external preamplifiers when interfacing to low-output transducers (e.g., AD590, RTDs, load cells), reducing BOM count and board space. |
| No user trims required | Laser wafer-trimmed SiCr resistor ladder and factory-calibrated offset/gain ensure ±1/2 LSB accuracy across full temperature range-no field calibration or potentiometers needed. |
| Flexible input/output configuration | Four selectable modes (via BPO/UPO + FORMAT) support unipolar/bipolar inputs and straight binary/2's complement outputs-enables reuse across diverse sensor types without hardware change. |
| MIL-STD-883B compliance | Includes screening for mechanical shock, vibration, temperature cycling, and burn-in-meets reliability requirements for Class B and Class S military/aerospace applications. |
| Guaranteed no missing codes | Validated across –55°C to +125°C-ensures monotonicity in safety-critical systems where code dropout could cause control instability or false alarms. |
Applications
| Temperature Transducer Interface | Strain Gage Load Cell Digitization |
|---|---|
Use Scenario: Direct digitization of AD590 current-output temperature sensor or platinum RTD in environmental monitoring modules for aircraft or satellite subsystems. IC Role / Device Role / Timing Role: ADC with integrated instrumentation amp performs signal conditioning, scaling, and conversion-replaces discrete op-amp + reference + ADC chain. Use Value: Achieves 1°C resolution using ±128 mV range; eliminates external gain/offset trims and reduces component count by ≥4 parts per channel. |
Use Scenario: High-reliability force measurement in flight control surface actuators or weapon system test benches. IC Role / Device Role / Timing Role: Signal-conditioning ADC acquires differential millivolt-level output from Wheatstone bridge strain gages excited by ±2.5 V. Use Value: Delivers ~2.1 oz/LSB resolution over ±17 lb range; common-mode rejection suppresses excitation rail noise and ground-loop interference. |
| Differential Temperature Measurement | Military Data Acquisition Front-End |
Use Scenario: Monitoring thermal gradients across avionics chassis or engine compartments using dual AD590 sensors. IC Role / Device Role / Timing Role: Configured in bipolar mode to compute ΔT = T₁ − T₂ directly via differential input subtraction. Use Value: Enables 1°C differential resolution without software subtraction; internal matching minimizes inter-channel gain/offset mismatch vs. dual-ADC solutions. |
Use Scenario: Ruggedized telemetry unit collecting analog sensor data (vibration, pressure, voltage) in tactical vehicles or guided munitions. IC Role / Device Role / Timing Role: MIL-qualified ADC serving as primary digitizer in compact, conduction-cooled DAQ module with minimal external support. Use Value: Single +5 V operation, no missing codes, and 10 µs conversion meet real-time response and functional safety requirements per DO-254/DO-160. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit signal conditioning ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7810BRUZ | 10-bit SAR ADC, no integrated instrumentation amp, requires external op-amp and reference; 2.7–5.5 V supply; 1.5 µs conversion. | Higher resolution but lacks signal conditioning-suitable only when external amplification is already present and speed is prioritized over integration. | Select AD7810BRUZ only if system already includes precision instrumentation amps and needs >8-bit resolution; not drop-in compatible with AD670SE/883B. |
| MAX1113EPA+ | 8-bit SAR ADC with internal reference, no instrumentation amp; ±5 V supply required; 10 µs conversion; commercial temp range (0°C to +70°C). | Lacks differential input stage and military temperature rating-limited to benign environments without common-mode noise. | Choose MAX1113EPA+ for cost-sensitive commercial designs where transducer signals are pre-amplified and ambient conditions are controlled. |
Compared with AD7810BRUZ and MAX1113EPA+, the AD670SE/883B uniquely integrates instrumentation amplification, MIL-qualified temperature performance, and flexible bipolar/unipolar operation-making it the only option that eliminates external signal conditioning while meeting aerospace reliability standards.
Availability
AD670SE/883B is available at Aetrix Electronics and suitable for aerospace telemetry, defense-grade sensor interfaces, and ruggedized industrial data acquisition requiring stable component supply, long-term obsolescence management, and traceable MIL-qualified sourcing.
Supply support for AD670SE/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 AD670 product line was designed specifically for embedded signal acquisition in resource-constrained, high-reliability systems-integrating precision analog front-ends with digital control to reduce system-level design effort and improve measurement integrity in military, aerospace, and industrial instrumentation.
FAQ
What is the operating temperature range qualified for AD670SE/883B?
The AD670SE/883B is screened and qualified to operate from –55°C to +125°C per MIL-STD-883B, with full electrical specifications guaranteed across this range. This includes guaranteed no missing codes, ±1/2 LSB relative accuracy, and stable 10 µs conversion time-making AD670SE/883B suitable for extreme-environment applications such as jet engine monitoring and spaceborne payloads.
Does AD670SE/883B require external components for basic operation?
No, the AD670SE/883B requires no external components for full 8-bit accuracy. It integrates an instrumentation amplifier, precision 2.5 V reference, DAC, SAR core, and three-state output buffers on a single die. Only decoupling capacitors (recommended 0.1 µF ceramic near VCC/GND) and proper grounding are needed-no trims, op-amps, or external references are required for AD670SE/883B to meet datasheet specifications.
How does the AD670SE/883B handle bipolar versus unipolar input signals?
The AD670SE/883B selects input format via the BPO/UPO pin: grounded for unipolar (0 mV to 255 mV or 0 V to 2.55 V), tied to VCC for bipolar (±128 mV or ±1.28 V). Combined with the FORMAT pin, it supports four modes-unipolar/straight binary, bipolar/offset binary, unipolar/2's complement, and bipolar/2's complement-allowing flexible software-driven configuration per conversion cycle in AD670SE/883B.
What is the significance of "MIL-STD-883B Compliant" for AD670SE/883B?
MIL-STD-883B compliance for AD670SE/883B means the device undergoes rigorous screening-including temperature cycling, mechanical shock, vibration, and burn-in-to verify reliability under military environmental stresses. It certifies that AD670SE/883B meets Class B or Class S requirements for use in defense systems where failure is not acceptable, with full traceability and lot-level documentation provided.
Can AD670SE/883B interface directly to a microprocessor data bus?
Yes, AD670SE/883B features three-state CMOS-compatible digital outputs (D0–D7) and standard control signals (R/W, CS, CE) that interface directly to 8-bit microprocessor buses (e.g., 8085, Z80, 6800 families) without level-shifting or bus transceivers. STATUS pin provides ready/busy indication, enabling efficient polled or interrupt-driven data capture in AD670SE/883B-based systems.
AD670SE/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
AD670SE/883B FAQ
1.How can I place an order for AD670SE/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD670SE/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 AD670SE/883B reliable?
The price and inventory of AD670SE/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD670SE/883B is usually 5 days.
3.What payment methods are accepted for AD670SE/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD670SE/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD670SE/883B?
AD670SE/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD670SE/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 AD670SE/883B?
For technical support, including AD670SE/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD670SE/883B requirements.
6.How does Aetrix verify that AD670SE/883B is sourced from the original manufacturer or authorized distributors?
All AD670SE/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 AD670SE/883B meets industry standards.
7.What is the process for return or replacement of AD670SE/883B?
All AD670SE/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD670SE/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 AD670SE/883B part is unused and in its original packaging.
Return procedure for AD670SE/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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