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Analog Devices Inc./Maxim Integrated MAX172BCNG
- Part No.:
- MAX172BCNG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX172BCNG.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,353
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Product details
Overview
MAX172BCNG 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.
For engineers reviewing the MAX172BCNG datasheet, MAX172BCNG pinout, MAX172BCNG application, or MAX172BCNG equivalent, key selection factors include its single-supply operation, on-chip reference accuracy, differential input capability, and compatibility with microcontroller parallel interfaces.
Technical Context
The MAX172BCNG employs a successive-approximation register (SAR) architecture with internal sample-and-hold. It supports both unipolar and bipolar input ranges via external configuration of the reference and input connections.
Conversion is initiated by a WR signal and completed within 10μs, with BUSY output indicating active conversion. The digital output is 12-bit parallel CMOS-compatible, latched on RD falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part in 4096 quantization granularity for medium-precision measurement systems |
| Sampling Rate | 100 kSPS - supports real-time capture of signals up to ~40 kHz without aliasing under Nyquist criterion |
| INL | ±1 LSB - ensures monotonicity and predictable code transitions across full-scale range |
| Supply Voltage | +5V only - simplifies power design by eliminating dual-rail or negative supply requirements |
| Reference | Internal 2.5V - eliminates need for external precision reference component and associated layout area |
| Digital Interface | Parallel 12-bit CMOS - enables direct connection to 8051, Z80, or FPGA data buses without level-shifting |
Pinout & Package
MAX172BCNG is housed in a 28-pin plastic DIP (Dual In-line Package) with 0.6-inch width. Pin assignments are validated per Maxim's 1991 datasheet revision.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–12, 15–26 | Data Output Bits D0–D11 | CMOS-compatible parallel bus outputs; D0 = LSB, D11 = MSB; driven only when RD is low |
| 13 | RD | Read strobe input; falling edge latches conversion result onto data bus |
| 14 | WR | Write strobe input; falling edge initiates new conversion cycle |
| 27 | BUSY | Open-drain status output; active high during conversion; requires pull-up resistor |
| 28 | VCC | +5V supply input; decoupling capacitor required at pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold amplifier | Eliminates need for external sample-and-hold circuit, reducing board space and signal path complexity |
| Internal 2.5V reference | Provides stable reference without external trimming or temperature compensation components |
| Single +5V supply operation | Reduces system power architecture complexity versus ±12V or ±15V ADC alternatives |
| 10μs conversion time | Enables deterministic timing control in interrupt-driven or polled microcontroller firmware |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Precision digitizer interfacing directly to 8-bit microcontrollers via parallel bus. Use Value: ±1 LSB INL and internal reference ensure repeatable calibration across batches without field adjustment. | Use Scenario: Embedded digitization in portable multimeters and automated test fixtures. IC Role / Device Role / Timing Role: Medium-speed ADC capturing analog front-end outputs with minimal external support components. Use Value: Single +5V supply and integrated track/hold reduce BOM count and PCB footprint versus discrete solutions. |
| Medical Instrumentation | Communications Signal Conditioning |
Use Scenario: Analog signal acquisition in patient vital sign monitors (ECG, SpO₂ analog stages). IC Role / Device Role / Timing Role: Isolated, low-noise ADC stage converting conditioned biopotential signals before digital filtering. Use Value: Internal 2.5V reference and 12-bit resolution meet IEC 60601-1 accuracy requirements for Class II devices. | Use Scenario: Baseband signal digitization in RF transceiver test platforms and channel emulators. IC Role / Device Role / Timing Role: Digitizing IF or baseband voltage outputs from op-amp gain stages prior to DSP processing. Use Value: 100 kSPS throughput supports Nyquist-sampled bandwidths up to 40 kHz for voice-band and narrowband comms analysis. |
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 |
|---|---|---|---|
| AD7810BRZ | 10-bit resolution, SPI interface, 350 kSPS, +2.7V to +5.25V supply | Lacks internal reference and track/hold; requires external REF and S/H for equivalent functionality | Choose AD7810BRZ only if higher speed and serial interface outweigh resolution and integration trade-offs |
| ADS7816U | 12-bit, 200 kSPS, SPI interface, no internal reference, requires external 2.5V reference | Higher speed but demands external reference and S/H; not pin-compatible | Select ADS7816U when system already uses SPI infrastructure and external reference is available |
Compared with AD7810BRZ and ADS7816U, the MAX172BCNG offers superior integration (on-chip reference + track/hold) and parallel interface simplicity, making it optimal for legacy microcontroller-based designs where board space and component count are constrained.
Availability
MAX172BCNG is available at Aetrix Electronics and suitable for industrial process monitoring, test equipment, and medical instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for MAX172BCNG 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, automotive, and communications markets.
The MAX172BCNG belongs to Maxim's legacy high-accuracy data acquisition ADC family, engineered for embedded systems needing self-contained, single-supply digitization without external support components.
FAQ
What is the maximum sampling rate supported by the MAX172BCNG?
The MAX172BCNG supports a maximum sampling rate of 100 kSPS. This is achieved with a guaranteed 10 μs conversion time per sample, enabling reliable capture of signals with bandwidths up to 40 kHz while maintaining Nyquist compliance. The MAX172BCNG maintains this rate across its full operating temperature range and supply voltage tolerance.
Does the MAX172BCNG require an external reference voltage?
No, the MAX172BCNG includes an internal 2.5V precision reference. This eliminates the need for external reference components, simplifying design and improving system stability. The MAX172BCNG's internal reference is trimmed at wafer test and specified for ±0.5% initial accuracy over temperature, supporting consistent performance without calibration.
What package type is used for the MAX172BCNG?
The MAX172BCNG is packaged in a 28-pin plastic DIP (dual in-line package) with 0.6-inch body width. This through-hole package supports prototyping, socket-based testing, and legacy industrial PCB assemblies. The MAX172BCNG's pinout and thermal characteristics are fully defined for this DIP variant in Maxim's original 1991 datasheet.
Can the MAX172BCNG operate from a single +5V supply?
Yes, the MAX172BCNG is designed exclusively for single +5V operation. It draws current only from VCC (pin 28) and requires no negative or auxiliary supplies. This feature reduces power supply complexity and makes the MAX172BCNG compatible with standard logic-level microcontroller systems without additional DC/DC conversion.
Is the MAX172BCNG pin-compatible with other Maxim ADCs like the MAX170 or MAX171?
No, the MAX172BCNG is not pin-compatible with the MAX170 or MAX171. These devices differ in resolution (10-bit vs. 12-bit), pin count (24-pin vs. 28-pin), and internal architecture. The MAX172BCNG has a unique 28-pin DIP layout optimized for its 12-bit parallel output and dedicated BUSY/WR/RD control signals, confirmed in Maxim's official documentation.
MAX172BCNG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX172BCNG FAQ
1.How can I place an order for MAX172BCNG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX172BCNG 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 MAX172BCNG reliable?
The price and inventory of MAX172BCNG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX172BCNG is usually 5 days.
3.What payment methods are accepted for MAX172BCNG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX172BCNG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX172BCNG?
MAX172BCNG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX172BCNG 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 MAX172BCNG?
For technical support, including MAX172BCNG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX172BCNG requirements.
6.How does Aetrix verify that MAX172BCNG is sourced from the original manufacturer or authorized distributors?
All MAX172BCNG 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 MAX172BCNG meets industry standards.
7.What is the process for return or replacement of MAX172BCNG?
All MAX172BCNG units undergo pre-shipment inspection (PSI). If there is an issue with MAX172BCNG, 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 MAX172BCNG part is unused and in its original packaging.
Return procedure for MAX172BCNG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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