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Analog Devices Inc./Maxim Integrated MAX172BCWG+
- Part No.:
- MAX172BCWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX172BCWG+.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
MAX172BCWG+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with internal track/hold, reference, and clock. It operates from a single +5V supply, achieves 100ksps sampling rate, and features ±1 LSB integral nonlinearity. It is used in data acquisition systems requiring medium-speed precision digitization of analog sensor signals.
For engineers reviewing the MAX172BCWG+ datasheet, MAX172BCWG+ pinout, MAX172BCWG+ application, or MAX172BCWG+ equivalent, key selection considerations include its 12-bit resolution, single-supply operation, on-chip reference accuracy, and compatibility with microcontroller SPI-like serial interfaces.
Technical Context
The MAX172BCWG+ employs a successive-approximation register (SAR) architecture with internal sample-and-hold, eliminating external hold circuitry. It integrates a trimmed 2.5V bandgap reference and requires no external clock components for basic operation.
Its serial interface uses a 3-wire protocol compatible with standard microcontroller GPIOs - DATA OUT, CONVST (conversion start), and BUSY - enabling simple host control without dedicated SPI hardware. Conversion time is fixed at 10μs per sample.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog signal digitization |
| Sampling Rate | 100 kSPS - supports real-time monitoring of dynamic signals up to ~40 kHz bandwidth |
| INL | ±1 LSB - ensures monotonicity and minimal code-width variation across full scale |
| Supply Voltage | +5V only - simplifies power design with single-rail operation, no negative or auxiliary supplies |
| Reference | Internal 2.5V bandgap - eliminates need for external reference IC or trimming components |
| Interface | 3-wire serial (CONVST, BUSY, DATA OUT) - enables direct connection to general-purpose I/O pins |
Pinout & Package
MAX172BCWG+ is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-013AC dimensions (7.5mm width, 1.27mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Active-high edge-triggered signal initiating conversion cycle; ties directly to MCU GPIO |
| BUSY | Busy Status Output | Active-high open-drain output indicating conversion in progress; used for polling or interrupt |
| DATA OUT | Serial Data Output | MSB-first serial bitstream synchronized to internal clock; requires no external clock line |
| VDD | Positive Supply | +5V supply input; decoupling capacitor required within 1cm of pin |
| AGND / DGND | Analog & Digital Ground | Separate ground pins for noise isolation; must be connected at single point near device |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold amplifier | Removes need for external sample-and-hold circuitry, reducing board area and component count |
| Internal 2.5V reference | Provides stable reference without external trimming or temperature compensation components |
| Single +5V supply operation | Eliminates dual-supply design complexity and associated regulation overhead |
| 10μs conversion time | Enables deterministic timing control in real-time embedded loop applications |
Applications
| Industrial Sensor Interface | Portable Data Logger |
|---|---|
Use Scenario: Digitizing outputs from strain gauges, RTDs, or pressure transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Precision ADC front-end converting low-level mV-range analog signals into digital values for controller processing. Use Value: ±1 LSB INL and internal reference ensure repeatable measurement accuracy without calibration drift over temperature. | Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and light levels over extended periods. IC Role / Device Role / Timing Role: Low-pin-count, single-supply ADC minimizing system power and PCB footprint. Use Value: 3-wire interface and 100ksps capability enable fast burst sampling while maintaining MCU GPIO flexibility and low quiescent current. |
| Medical Instrumentation | Test & Measurement Equipment |
Use Scenario: Signal conditioning in portable ECG or pulse oximetry units where size and supply simplicity are critical. IC Role / Device Role / Timing Role: Analog front-end digitizer capturing biopotential waveforms with sufficient resolution for diagnostic fidelity. Use Value: 12-bit resolution and internal track/hold support accurate reproduction of waveform amplitude and shape without external hold capacitor tuning. | Use Scenario: Benchtop multimeters and oscilloscope auxiliary channels requiring calibrated, repeatable DC voltage measurement. IC Role / Device Role / Timing Role: High-linearity ADC core referenced to stable internal 2.5V source for absolute voltage accuracy. Use Value: ±1 LSB INL and trimmed reference reduce system-level calibration burden and improve long-term measurement stability. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200ksps, SPI-compatible interface, requires external reference | Lower resolution limits use in precision measurement; higher speed suits faster control loops | Select when cost-sensitive designs prioritize speed over resolution and can accommodate external reference design |
| MAX1166BCPA+ | 12-bit, 100ksps, internal reference, but uses SPI interface with separate SCLK and CS lines | Requires dedicated SPI peripheral instead of GPIO-driven 3-wire protocol | Choose when existing firmware already implements SPI peripherals and layout supports additional signal routing |
Compared with ADS7822U and MAX1166BCPA+, the MAX172BCWG+ offers unique integration of 12-bit accuracy, single-supply operation, and minimal GPIO interface - reducing both BOM count and firmware driver complexity in resource-constrained embedded systems.
Availability
MAX172BCWG+ is available at Aetrix Electronics and suitable for industrial sensor interface, portable data logging, medical instrumentation, and test & measurement equipment requiring stable component supply and long-term manufacturability.
Supply support for MAX172BCWG+ 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 industrial, medical, and communications applications.
The MAX172 series targets medium-speed, high-accuracy data acquisition in space- and power-constrained systems where integration of reference, track/hold, and simplified interface reduces system-level design effort.
FAQ
What is the maximum sampling rate of the MAX172BCWG+?
The MAX172BCWG+ achieves a guaranteed maximum sampling rate of 100 kSPS (kilo-samples per second). Each conversion completes in a fixed 10 μs, enabling deterministic timing in real-time embedded applications. This rate is maintained across the full operating temperature range and supply voltage tolerance specified in the datasheet.
Does the MAX172BCWG+ require an external reference voltage?
No, the MAX172BCWG+ includes a factory-trimmed 2.5V bandgap reference. This internal reference eliminates the need for external reference ICs or trimming components, simplifying layout and improving long-term stability. The reference is specified to ±0.5% initial accuracy and exhibits low temperature drift over –40°C to +85°C.
What interface protocol does the MAX172BCWG+ use?
The MAX172BCWG+ uses a proprietary 3-wire serial interface consisting of CONVST (conversion start), BUSY (busy status), and DATA OUT (serial data). It does not require an external clock line - all timing is generated internally. This allows direct connection to general-purpose microcontroller GPIOs without dedicated SPI hardware.
Is the MAX172BCWG+ pin-compatible with other devices in the MAX17x family?
No, the MAX172BCWG+ is not pin-compatible with other MAX17x-series ADCs such as the MAX170 or MAX171. Its 24-pin SOIC pinout is unique to the MAX172 family. Pin assignments for CONVST, BUSY, and DATA OUT differ from those in related parts, requiring dedicated PCB layout.
What is the integral nonlinearity (INL) specification for the MAX172BCWG+?
The MAX172BCWG+ has a maximum integral nonlinearity (INL) of ±1 LSB over its full operating range. This ensures monotonic transfer function and predictable code transitions, making it suitable for closed-loop control and precision measurement applications where code-width consistency is critical.
MAX172BCWG+ 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX172BCWG+ FAQ
1.How can I place an order for MAX172BCWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX172BCWG+ 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 MAX172BCWG+ reliable?
The price and inventory of MAX172BCWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX172BCWG+ is usually 5 days.
3.What payment methods are accepted for MAX172BCWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX172BCWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX172BCWG+?
MAX172BCWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX172BCWG+ 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 MAX172BCWG+?
For technical support, including MAX172BCWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX172BCWG+ requirements.
6.How does Aetrix verify that MAX172BCWG+ is sourced from the original manufacturer or authorized distributors?
All MAX172BCWG+ 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 MAX172BCWG+ meets industry standards.
7.What is the process for return or replacement of MAX172BCWG+?
All MAX172BCWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX172BCWG+, 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 MAX172BCWG+ part is unused and in its original packaging.
Return procedure for MAX172BCWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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