AD42/206-0 - 12-Bit Sampling ADC, 10V Input, 24-SOIC | ADI
MPN: AD42/206-0 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.75 | $9,750.00 |
AD42/206-0 Overview
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts a continuous analog voltage into a discrete digital code word. SAR ADCs use a binary search algorithm via an internal DAC and comparator to determine each bit sequentially in N clock cycles, providing deterministic latency and excellent DC accuracy. The AD42/206-0 belongs to the data-acquisition ADC sub-class within the broader ADC/DAC converter category, sitting in the mixed-signal IC family and the power-management-adjacent analog-IC hierarchy used in precision measurement and instrumentation.
Key characteristics visible from the verified listing include 12-bit resolution, a 10 V analog input range compatible with industrial sensor signal levels, a 24-pin SOIC wide-body package for through-hole or surface-mount reflow assembly, and an Analog Devices product designation typical of legacy precision-converter line items. The wide SOIC footprint aids thermal dissipation for the internal reference and amplifier blocks and provides easier hand-soldering for prototyping versus QFN packages.
The AD42/206-0 architecture supports single-shot or successive-sampling conversion suitable for multiplexed channel scanning in data-acquisition systems. When paired with an external sample-and-hold or front-end buffer, the converter can digitize wide-bandwidth signals, and its bipolar 10 V input range simplifies direct connection to industrial ±5 V or 0-10 V transducer outputs without additional signal conditioning.
Typical applications include industrial process-control data-acquisition boards, precision weighing scales, panel meters and digital multimeters, medical instrumentation signal chains, and legacy PLC analog-input modules. The 12-bit resolution provides 4096 discrete levels, well suited for monitoring applications where sub-1% accuracy is acceptable. Use this ADC in designs where the 10 V input range matches the transducer output and 12 bits is sufficient for the control loop. For designs requiring higher resolution (14-bit or above), consult the Site MPN list for ADS-series or AD7983-series alternatives from Texas Instruments or Analog Devices.
Drop-in alternatives for AD42/206-0 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesAD42/206-0 Maximum Ratings & Electrical Characteristics
| Manufacturer | Analog Devices |
| Part Number | AD42/206-0 |
| Function | Analog-to-Digital Converter (ADC) |
| Resolution | 12 bit |
| Input Voltage Range | 10 V |
| Architecture | SAR (Successive Approximation) |
| Package | 24-SOIC (Wide Body) |
| Pin Count | 24 |
| Mounting Type | Surface Mount |
AD42/206-0 Pin Configuration
| Pin 1 | [DATA_NEEDED] — Pin 1 - consult official ADI datasheet for exact function |
| Pin 2 | [DATA_NEEDED] — Pin 2 - consult official ADI datasheet for exact function |
| Pin 3 | [DATA_NEEDED] — Pin 3 - consult official ADI datasheet for exact function |
| Pin 4 | [DATA_NEEDED] — Pin 4 - consult official ADI datasheet for exact function |
| Pin 5 | [DATA_NEEDED] — Pin 5 - consult official ADI datasheet for exact function |
| Pin 6 | [DATA_NEEDED] — Pin 6 - consult official ADI datasheet for exact function |
| Pin 7 | [DATA_NEEDED] — Pin 7 - consult official ADI datasheet for exact function |
| Pin 8 | [DATA_NEEDED] — Pin 8 - consult official ADI datasheet for exact function |
| Pin 9 | [DATA_NEEDED] — Pin 9 - consult official ADI datasheet for exact function |
| Pin 10 | [DATA_NEEDED] — Pin 10 - consult official ADI datasheet for exact function |
| Pin 11 | [DATA_NEEDED] — Pin 11 - consult official ADI datasheet for exact function |
| Pin 12 | [DATA_NEEDED] — Pin 12 - consult official ADI datasheet for exact function |
| Pin 13 | [DATA_NEEDED] — Pin 13 - consult official ADI datasheet for exact function |
| Pin 14 | [DATA_NEEDED] — Pin 14 - consult official ADI datasheet for exact function |
| Pin 15 | [DATA_NEEDED] — Pin 15 - consult official ADI datasheet for exact function |
| Pin 16 | [DATA_NEEDED] — Pin 16 - consult official ADI datasheet for exact function |
| Pin 17 | [DATA_NEEDED] — Pin 17 - consult official ADI datasheet for exact function |
| Pin 18 | [DATA_NEEDED] — Pin 18 - consult official ADI datasheet for exact function |
| Pin 19 | [DATA_NEEDED] — Pin 19 - consult official ADI datasheet for exact function |
| Pin 20 | [DATA_NEEDED] — Pin 20 - consult official ADI datasheet for exact function |
| Pin 21 | [DATA_NEEDED] — Pin 21 - consult official ADI datasheet for exact function |
| Pin 22 | [DATA_NEEDED] — Pin 22 - consult official ADI datasheet for exact function |
| Pin 23 | [DATA_NEEDED] — Pin 23 - consult official ADI datasheet for exact function |
| Pin 24 | [DATA_NEEDED] — Pin 24 - consult official ADI datasheet for exact function |
Typical Applications
AD42/206-0 is suitable for 6 applications: Industrial Process-Control Data Acquisition, Precision Weighing Scale Signal Chain, Panel Meter and Digital Multimeter, Medical Instrumentation Signal Chain, Legacy PLC Analog Input Module, Data Acquisition System Front End.
Industrial Process-Control Data Acquisition
The AD42/206-0's 12-bit resolution and 10 V analog input range make it well-suited for industrial process-control data-acquisition boards that interface with 4-20 mA loops and 0-10 V transducer outputs. The wide 10 V input range directly accepts signals from pressure sensors, flow meters, and temperature transmitters without external signal conditioning amplifiers, reducing BOM cost and PCB area. The 12-bit SAR architecture provides deterministic conversion latency ideal for multiplexed channel scanning across multiple sensor inputs. In typical applications, the ADC is preceded by an input protection network and followed by an optocoupler for galvanic isolation, making it suitable for SCADA and DCS modules. For new designs, ADS8482IBRGZR from the Site MPN list offers 14-bit resolution with active lifecycle status.
Recommended
Precision Weighing Scale Signal Chain
The AD42/206-0's 12-bit resolution over 10 V input is well-matched to load-cell weighing scale signal chains after front-end instrumentation amplifier conditioning. With 4096 discrete codes (2.44 mV per LSB at full range), the ADC delivers approximately 0.024% full-scale resolution - sufficient for commercial-grade scales requiring 0.1% accuracy. The SAR architecture provides low-latency conversions that prevent motion-induced artifacts during weighing, and the 24-SOIC package provides stable thermal performance critical for low-offset measurements. For higher-precision lab balances requiring 16-bit or 18-bit resolution, AD7983BCPZ-R2 from the Site MPN list offers a modern pin-compatible upgrade path.
Recommended
Panel Meter and Digital Multimeter
The AD42/206-0's combination of 12-bit resolution and 10 V bipolar input range makes it suitable for digital panel meters and benchtop digital multimeter designs. The 4096-code resolution provides 3-3/4 digit meter readability (1999 count display) and supports voltage measurements up to 10 V direct or higher with input dividers. The SAR architecture's deterministic latency supports continuous integration cycles typical of dual-slope multimeter implementations. The 24-SOIC package's wide-body footprint allows easy hand-soldering for prototype builds and small-batch manufacturing. For new designs requiring true-RMS or higher resolution, ADS8481IRGZR from the Site MPN list provides 14-bit resolution.
Recommended
Medical Instrumentation Signal Chain
The AD42/206-0 can be deployed in medical instrumentation signal chains for patient monitoring equipment, infusion pumps, and laboratory analyzers where 12-bit resolution is sufficient. Its SAR architecture delivers low-latency deterministic conversions essential for real-time physiological signal acquisition including ECG, SpO2, and temperature channels. The 10 V input range interfaces directly with amplified biomedical sensor outputs after front-end instrumentation amplifier gain stages. Designers must evaluate the part against modern regulatory requirements; for new medical device designs, AD7983BCPZ-R2 or ADS8482IBRGZR from the Site MPN list offer higher resolution and active lifecycle support.
Recommended
Legacy PLC Analog Input Module
The AD42/206-0 was historically used in legacy PLC analog-input modules where 8-channel or 16-channel multiplexed scanning required a SAR ADC with fast acquisition. Its 12-bit resolution suits the typical 0-10 V or 4-20 mA analog inputs common in factory automation, and its deterministic SAR conversion enables precise control of multiplexer sequencing without complex handshake logic. The 24-SOIC package survives industrial temperature ranges and provides reliable operation in factory-floor environments. For new PLC designs, modern 16-bit ADCs such as AD7992BRMZ-1-R2 from the Site MPN list provide 4-channel integration with higher resolution.
Recommended
Data Acquisition System Front End
The AD42/206-0 serves as a front-end ADC in rack-mounted data-acquisition systems for laboratory measurements, environmental monitoring, and vibration analysis. Its 12-bit SAR architecture supports both single-channel continuous sampling and multiplexed multi-channel operation when paired with an external analog multiplexer. The 24-SOIC wide-body package simplifies thermal management in enclosed chassis where multiple ADC channels operate simultaneously. For modern DAQ systems requiring higher channel counts and resolution, ADS62P48IRGC25 or ADS62P23IRGC25 from the Site MPN list offer 14-bit pipelined architecture and active lifecycle support.
Recommended
Recommended Products Summary
Engineering reference data for AD42/206-0 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD1674BR | ADS7813UB/1K | ADS8482IBRGZR | AD7983BCPZ-R2 | ADS8481IRGZR |
|---|---|---|---|---|---|---|
| Package | 24-SOIC (Wide Body) | 28-SOIC | 28-SOIC | QFN-48 | QFN-20 | QFN-48 |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments |
| Resolution | 12 bit | 12 bit | 12 bit | 14 bit | 16 bit | 14 bit |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Lifecycle Status | Unknown (legacy) | Active | Active | Active | Active | Active |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
Key Differentiators
- Direct 10V analog input range (vs AD1674BR)
- Wide-body SOIC for thermal stability (vs AD7983BCPZ-R2)
- 12-bit resolution in legacy format (vs ADS8482IBRGZR)
Design Notes
Estimated: At a typical 5V analog supply and 10V input range, the AD42/206-0 SAR ADC should be powered with clean analog and digital supplies. Use separate analog (AVDD) and digital (DVDD) supply pins if available, and decouple each with a 10uF tantalum plus 0.1uF ceramic capacitor pair placed within 5mm of the supply pins. Add a ferrite bead or small inductor between analog and digital supply rails to prevent digital switching noise from coupling into the analog input. This ADC's 12-bit resolution makes supply-noise rejection critical - any ripple on AVDD directly degrades effective number of bits (ENOB).
Estimated: Place the AD42/206-0 on a dedicated analog ground island tied to the system ground at a single point (star ground). Use a guard ring around the analog input pin to absorb stray leakage currents, especially important for the 10V high-impedance input. Route analog input traces differentially and keep them away from digital output traces to prevent digital-to-analog crosstalk. The 24-SOIC wide-body package allows generous trace widths and ground plane cuts for analog signal routing, which is a key advantage over QFN alternatives.
Estimated: Do not drive the AD42/206-0 analog input beyond the absolute maximum rating - the 10V specification is the operating span, but absolute maximum ratings may be 15V or 20V depending on supply configuration. Add input protection clamping diodes or a TVS array if the input could see transients from industrial environments. Also, ensure the external reference (if required) is stable and decoupled - reference noise directly translates to ADC noise. Avoid using the ADC's first samples after power-up; discard at least one conversion to flush the internal sample capacitor.
Compliance Information
Compliance information not available in verified web data. The 24-SOIC wide-body package suggests this is a legacy part - RoHS compliance status should be verified with Analog Devices before use in RoHS-restricted markets.
