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Analog Devices Inc./Maxim Integrated MAX166DEWP
- Part No.:
- MAX166DEWP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX166DEWP.pdf
- Description:
- IC ADC 8BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
MAX166DEWP from Maxim Integrated is a 12-bit, 100ksps successive-approximation analog-to-digital converter (ADC) with internal reference and parallel interface in a 28-pin SOIC package. It features ±1 LSB integral nonlinearity, 0.5 LSB differential nonlinearity, and operates from a single +5V supply. It is used in data acquisition systems requiring medium-speed precision digitization.
For engineers reviewing the MAX166DEWP datasheet, MAX166DEWP pinout, MAX166DEWP application, or MAX166DEWP equivalent, key selection considerations include sampling rate, INL/DNL performance, reference integration, parallel interface timing, and single-supply operation in industrial measurement and control designs.
Technical Context
The MAX166DEWP implements a successive-approximation register (SAR) architecture with an internal 2.5V bandgap reference. It supports 12-bit resolution with no missing codes over temperature and includes a built-in track/hold amplifier for signal conditioning prior to conversion.
Conversion is initiated by a rising edge on the CONVST input, and data is output via an 8-bit parallel bus with byte-select control (HBEN/LBEN). The device uses CMOS process technology and is specified for operation from 0°C to +70°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels for medium-precision measurement systems |
| Sampling Rate | 100 ksps - supports real-time capture of signals up to ~40 kHz bandwidth per Nyquist criterion |
| INL | ±1 LSB - ensures monotonic transfer function and accurate end-point linearity in calibration-critical applications |
| DNL | 0.5 LSB - guarantees no missing codes across full temperature range, essential for reliable data logging |
| Reference | Internal 2.5V bandgap - eliminates external reference component count and improves system-level temperature stability |
| Supply Voltage | +5V single supply - simplifies power design and enables direct interfacing with TTL/CMOS logic |
| Operating Temp | 0°C to +70°C - rated for commercial-grade environments including test equipment and PLC I/O modules |
Pinout & Package
MAX166DEWP is housed in a 28-pin wide-body SOIC (SO28W) package with standard 0.3-inch body width and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Rising-edge-triggered command initiates sample-and-hold and ADC conversion cycle |
| RD | Read Strobe Input | Active-low signal enables parallel data output onto D0–D7 bus after conversion completes |
| HBEN/LBEN | High/Low Byte Enable | Controls whether upper or lower 8 bits of 12-bit result appear on D0–D7 during read access |
| DATA[7:0] | Parallel Data Output Bus | 8-bit bidirectional bus delivering 12-bit result in two cycles; requires external latch for full-word capture |
| REF | Reference Voltage Output | Provides buffered 2.5V reference for external circuitry or optional external reference feedback |
| AGND/DGND | Analog/Digital Ground | Separate ground pins minimize digital switching noise coupling into analog conversion path |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.5V Reference | Reduces BOM count and layout complexity while maintaining ±0.5% initial accuracy over temperature |
| No Missing Codes | Guaranteed across full operating temperature range, enabling robust data acquisition without interpolation or error correction |
| Byte-Selectable Parallel Interface | Supports efficient microprocessor interfacing using standard 8-bit data buses without requiring 12-bit wide hardware |
| Track/Hold Amplifier | Integrated front-end holds input voltage stable during conversion, eliminating need for external sample-hold circuit |
| Single +5V Supply | Eliminates dual-supply generation and associated filtering, reducing power supply design effort and cost |
Applications
| Industrial Data Loggers | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous monitoring of sensor outputs (e.g., thermocouples, strain gauges) in factory-floor environmental stations. IC Role / Device Role / Timing Role: Precision digitizer capturing analog inputs at 100 ksps with calibrated linearity for long-term trend analysis. Use Value: ±1 LSB INL ensures traceable measurement accuracy without periodic recalibration in unattended deployments. | Use Scenario: Front-end digitization in benchtop multimeters and waveform analyzers requiring medium-speed sampling. IC Role / Device Role / Timing Role: High-fidelity ADC converting conditioned analog signals into digital words for display and storage. Use Value: Internal reference and no-missing-codes guarantee consistent reading repeatability across instrument lifetime. |
| Programmable Logic Controller (PLC) I/O Modules | Medical Instrumentation Interfaces |
Use Scenario: Analog input expansion cards acquiring voltage/current loop signals in modular automation controllers. IC Role / Device Role / Timing Role: Isolated channel ADC providing deterministic 100 ksps sampling synchronized to PLC scan cycle. Use Value: Single +5V operation simplifies isolated power domain design; parallel interface enables low-latency host CPU readout. | Use Scenario: Signal conditioning stage in portable ECG or patient monitoring devices digitizing biopotential waveforms. IC Role / Device Role / Timing Role: Low-noise, medium-speed ADC converting amplified bio-signals with minimal added distortion. Use Value: Separate AGND/DGND pins reduce digital noise coupling, preserving signal integrity critical for diagnostic interpretation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ | 12-bit, 100 ksps SAR ADC with internal reference; differs in pinout, uses SPI interface instead of parallel | Suitable for microcontroller-based systems with limited GPIO but not for legacy 8-bit bus architectures | Select AD7892BRZ when serial interface and smaller footprint (20-lead SOIC) are prioritized over parallel bus compatibility |
| ADS7822U | 12-bit, 200 ksps SAR ADC; no internal reference, requires external 2.5V reference; 8-pin SOIC package | Better speed but higher system-level component count and layout sensitivity due to external reference dependency | Select ADS7822U only if sampling rate >100 ksps is required and reference routing can be tightly controlled |
Compared with AD7892BRZ and ADS7822U, the MAX166DEWP uniquely provides parallel byte-accessible output, integrated reference, and SO28W packaging optimized for industrial PCB layouts with existing 8-bit data buses-making it suitable where bus timing predictability and reduced external components are critical.
Availability
MAX166DEWP is available at Aetrix Electronics and suitable for industrial data loggers, test equipment, and PLC I/O modules requiring stable component supply and long-term production continuity.
Supply support for MAX166DEWP 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability ICs for industrial, automotive, and communications applications.
The MAX166DEWP belongs to Maxim's precision data acquisition ADC family, engineered for medium-speed, high-linearity digitization in space-constrained industrial control and instrumentation systems.
FAQ
What is the maximum sampling rate supported by the MAX166DEWP?
The MAX166DEWP supports a maximum sampling rate of 100 ksps (100,000 samples per second), determined by its internal clock timing and conversion cycle duration. This rate is guaranteed across the full 0°C to +70°C operating temperature range and with the internal reference enabled. The MAX166DEWP maintains full 12-bit accuracy and no missing codes at this rate, making it suitable for time-critical acquisition tasks in industrial monitoring systems.
Does the MAX166DEWP require an external reference voltage?
No, the MAX166DEWP includes an internal 2.5V bandgap reference that is fully specified and calibrated across temperature. This reference can be used directly for conversion or accessed at the REF pin for external circuit biasing. An external reference may be applied only if higher initial accuracy or custom voltage scaling is needed, but doing so disables the internal reference and requires careful decoupling per the MAX166DEWP datasheet layout guidelines.
How is 12-bit data read from the MAX166DEWP's parallel interface?
The MAX166DEWP outputs its 12-bit result across an 8-bit data bus (D0–D7) in two sequential bytes, controlled by HBEN (high-byte enable) and LBEN (low-byte enable) inputs. First, HBEN is asserted to place bits D11–D8 on D3–D0; then LBEN is asserted to place D7–D0 on D7–D0. A microprocessor reads each byte separately and combines them into a full 12-bit word. The MAX166DEWP does not provide a 12-bit-wide bus.
What is the operating temperature range for the MAX166DEWP?
The MAX166DEWP is specified for operation from 0°C to +70°C ambient temperature, classified as commercial grade. This range covers typical indoor industrial environments, laboratory test benches, and non-automotive embedded systems. It is not rated for extended temperature ranges such as –40°C to +85°C or automotive AEC-Q100 qualification. Designs requiring wider thermal margins must consider alternative parts or derating analysis.
Is the MAX166DEWP pin-compatible with other Maxim ADCs like the MAX167 or MAX168?
No, the MAX166DEWP is not pin-compatible with the MAX167 or MAX168. Although all three belong to the same product family and share functional similarities, they differ in pin count (MAX166DEWP is 28-pin SOIC; MAX167/MAX168 are 24-pin packages), pin assignments (e.g., different control signal locations), and internal feature sets (e.g., reference configuration, power-down modes). Direct substitution would require PCB layout changes and firmware adaptation for the MAX166DEWP.
MAX166DEWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX166DEWP FAQ
1.How can I place an order for MAX166DEWP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX166DEWP 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 MAX166DEWP reliable?
The price and inventory of MAX166DEWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX166DEWP is usually 5 days.
3.What payment methods are accepted for MAX166DEWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX166DEWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX166DEWP?
MAX166DEWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX166DEWP 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 MAX166DEWP?
For technical support, including MAX166DEWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX166DEWP requirements.
6.How does Aetrix verify that MAX166DEWP is sourced from the original manufacturer or authorized distributors?
All MAX166DEWP 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 MAX166DEWP meets industry standards.
7.What is the process for return or replacement of MAX166DEWP?
All MAX166DEWP units undergo pre-shipment inspection (PSI). If there is an issue with MAX166DEWP, 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 MAX166DEWP part is unused and in its original packaging.
Return procedure for MAX166DEWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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