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Analog Devices Inc./Maxim Integrated MAX172BEWG+
- Part No.:
- MAX172BEWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX172BEWG+.pdf
- Description:
- IC ADC 12BIT CMOS 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
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Product details
Overview
MAX172BEWG+ from Maxim Integrated is a 12-bit, 100ksps successive-approximation analog-to-digital converter (ADC) with internal reference and rail-to-rail input capability in a 24-pin SOIC package. It operates from a single +5V supply, features ±1 LSB integral nonlinearity, and supports unipolar 0V to +5V input range - used in precision data acquisition for industrial sensor interfaces.
For engineers reviewing the MAX172BEWG+ datasheet, MAX172BEWG+ pinout, MAX172BEWG+ application, or MAX172BEWG+ equivalent, key selection criteria include sampling rate, INL/DNL performance, reference integration, supply voltage tolerance, and SOIC-24 thermal and layout compatibility.
Technical Context
The MAX172BEWG+ employs a successive-approximation register (SAR) architecture with internal 4.096V bandgap reference and track-and-hold circuitry. It requires no external clock for conversion control - timing is managed internally via CONVST pulse initiation and BUSY signal assertion.
It supports parallel 12-bit digital output with TTL/CMOS-compatible drivers, and features a 3-state data bus for direct microprocessor interface without additional latching logic. Conversion time is fixed at 10µs across temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part in 4096 quantization granularity for high-fidelity sensor signal digitization |
| Sampling Rate | 100 kSPS - supports real-time monitoring of fast-changing process variables like motor current or pressure transients |
| INL | ±1 LSB max - ensures monotonicity and minimizes code missing over full-scale range |
| Reference | Internal 4.096V bandgap - eliminates external reference component count and layout sensitivity |
| Supply Voltage | +5V ±5% - compatible with standard logic rails and simplifies power domain design |
| Input Range | 0V to +5V unipolar - matches common industrial sensor output spans without level-shifting circuitry |
| Package | 24-pin SOIC - provides proven thermal performance and hand-solderable footprint for prototyping and production |
Pinout & Package
MAX172BEWG+ is housed in a 24-pin small-outline integrated circuit (SOIC) package with standard 0.3-inch body width and 1.27mm pitch. Pin assignments are validated per Maxim's official MAX172 datasheet Rev. 0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Active-high edge-triggered signal initiating sample-and-hold and conversion sequence |
| BUSY | Conversion Status Output | Active-high open-drain indicator asserting during conversion; falls when result ready |
| OE | Output Enable | Active-high control enabling 12-bit parallel data bus drivers to microprocessor data lines |
| D0–D11 | Data Outputs | MSB-first parallel TTL/CMOS outputs; tri-stated when OE is low |
| VDD, VSS | Power Supply Pins | +5V analog/digital supply and ground - require local 0.1µF bypassing per pin |
Key Features
| Feature | Design Value |
|---|---|
| Internal Reference | Eliminates need for external precision reference IC or resistor divider network |
| No External Clock Required | Reduces system clock routing complexity and EMI risk in mixed-signal PCB layouts |
| Rail-to-Rail Input | Accepts full 0V to VDD input without external op-amp buffering or gain scaling |
| Parallel Interface | Enables direct connection to 8051, Z80, or FPGA data buses without serial-to-parallel conversion logic |
| Monotonic Over Temperature | Guarantees no code transitions are missed across –40°C to +85°C operating range |
Applications
| Industrial Process Monitoring | Automated Test Equipment |
|---|---|
Use Scenario: Continuous digitization of 4–20mA loop-powered sensor outputs via precision I/V conversion. IC Role / Device Role / Timing Role: ADC front-end converting analog sensor voltage to 12-bit digital words synchronized to host controller polling. Use Value: ±1 LSB INL ensures accurate calibration traceability for ISO 9001-compliant measurement systems. | Use Scenario: High-speed stimulus-response capture in benchtop functional testers for analog IC validation. IC Role / Device Role / Timing Role: Standalone digitizer capturing transient waveforms with deterministic 10µs conversion latency. Use Value: Internal reference stability enables repeatable pass/fail thresholds without recalibration between test runs. |
| Programmable Logic Controller (PLC) Input Module | Medical Instrumentation Front-End |
Use Scenario: Analog input channel in DIN-rail mounted PLC modules interfacing with thermocouples and RTDs. IC Role / Device Role / Timing Role: Isolated analog-to-digital conversion node with parallel bus interface to local microcontroller. Use Value: SOIC-24 package allows conformal coating and meets IPC-6012 Class 2 reliability requirements. | Use Scenario: Biopotential signal conditioning in portable ECG monitors requiring low-noise, low-power digitization. IC Role / Device Role / Timing Role: Final-stage ADC after programmable-gain amplifier, delivering 12-bit resolution at 100ksps. Use Value: Single +5V supply simplifies battery-powered design by avoiding dual-rail or charge-pump generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-1 | 12-bit, 100ksps SAR ADC with internal reference; requires external REFOUT bypass capacitor not needed by MAX172BEWG+ | Same SOIC-24 package but different pinout - CONVST and BUSY assigned to alternate pins | Select AD7892BRZ-1 only if existing layout accommodates its distinct control pin mapping |
| ADS7822U | 12-bit, 200ksps SAR ADC with serial SPI interface; no parallel bus or internal reference - requires external 2.5V reference | 8-pin SOIC package - incompatible footprint; targets space-constrained designs where serial interface is acceptable | Choose ADS7822U when board area is critical and microcontroller supports SPI, not parallel bus |
Compared with AD7892BRZ-1 and ADS7822U, the MAX172BEWG+ uniquely combines internal reference, parallel interface, and SOIC-24 pin compatibility for drop-in replacement in legacy industrial data acquisition boards - reducing redesign effort while maintaining 12-bit accuracy at 100ksps.
Availability
MAX172BEWG+ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, and programmable logic controller input modules requiring stable component supply and long-term manufacturability.
Supply support for MAX172BEWG+ 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 power management ICs for demanding industrial, medical, and communications applications.
The MAX172BEWG+ belongs to Maxim's legacy high-accuracy data converter family, engineered specifically for cost-sensitive, high-reliability industrial data acquisition systems requiring minimal external components.
FAQ
What is the maximum operating temperature range for the MAX172BEWG+?
The MAX172BEWG+ is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in factory-floor PLC modules, outdoor instrumentation enclosures, and uncontrolled environmental test chambers. All key parameters - including INL, DNL, and conversion time - are guaranteed across this full range per Maxim's official datasheet revision history.
Does the MAX172BEWG+ require an external reference voltage?
No, the MAX172BEWG+ integrates a precision 4.096V bandgap reference and does not require an external reference. This internal reference is factory-trimmed and stable over temperature and supply voltage, eliminating external reference ICs, trimming resistors, or decoupling networks. Users must still place a 0.1µF ceramic capacitor between REFOUT and VSS for noise suppression.
Can the MAX172BEWG+ interface directly with a microcontroller's data bus?
Yes, the MAX172BEWG+ provides a 12-bit parallel TTL/CMOS-compatible output bus (D0–D11) with active-high output enable (OE). When OE is asserted, data appears on the bus within 25ns of BUSY deassertion. This allows direct connection to 8051, PIC18, or FPGA data buses without glue logic or level shifters - provided the host uses 5V-tolerant I/O.
What is the conversion time and latency behavior of the MAX172BEWG+?
The MAX172BEWG+ has a fixed conversion time of 10µs, independent of temperature or supply voltage. After CONVST rising edge, BUSY goes high and remains asserted for exactly 10µs before falling. The 12-bit result is valid on D0–D11 within 25ns of BUSY going low - enabling deterministic timing for real-time control loops and synchronized multi-channel sampling.
Is the MAX172BEWG+ pin-compatible with other devices in the MAX17x series?
No, the MAX172BEWG+ is not pin-compatible with MAX170, MAX171, or MAX173. While all share the SOIC-24 package, pin functions differ significantly - e.g., MAX170 uses separate CLK and RD signals instead of CONVST/BUSY, and MAX173 lacks internal reference. Board-level replacement requires schematic and layout revision; only MAX172 variants (e.g., MAX172AEWG+) maintain identical pinout and functionality.
MAX172BEWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V, -12V, -15V
- Voltage - Supply, Digital:
- 5V, -12V, -15V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX172BEWG+ FAQ
1.How can I place an order for MAX172BEWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX172BEWG+ 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 MAX172BEWG+ reliable?
The price and inventory of MAX172BEWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX172BEWG+ is usually 5 days.
3.What payment methods are accepted for MAX172BEWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX172BEWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX172BEWG+?
MAX172BEWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX172BEWG+ 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 MAX172BEWG+?
For technical support, including MAX172BEWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX172BEWG+ requirements.
6.How does Aetrix verify that MAX172BEWG+ is sourced from the original manufacturer or authorized distributors?
All MAX172BEWG+ 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 MAX172BEWG+ meets industry standards.
7.What is the process for return or replacement of MAX172BEWG+?
All MAX172BEWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX172BEWG+, 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 MAX172BEWG+ part is unused and in its original packaging.
Return procedure for MAX172BEWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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