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Analog Devices Inc./Maxim Integrated MAX147BCPP
- Part No.:
- MAX147BCPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX147BCPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,951
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Product details
Overview
The MAX147BCPP from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with software-configurable unipolar/bipolar and single-ended/differential inputs, operating from a single +2.7V to +5.25V supply. It integrates an 8-channel multiplexer, high-bandwidth track/hold, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. Its external reference architecture supports precision measurement in battery-powered data loggers and portable medical instruments.
For engineers reviewing the MAX147BCPP datasheet, MAX147BCPP pinout, MAX147BCPP application, or MAX147BCPP equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing and accuracy parameters - all confirmed for the MAX147BCPP variant with Plastic DIP package and 0°C to +70°C temperature range.
Technical Context
The MAX147BCPP uses successive-approximation (SAR) architecture with integrated track/hold circuitry, supporting conversion rates up to 133ksps using an external 2MHz clock. Its analog input stage accepts 8 single-ended or 4 pseudo-differential channel pairs (CH0/CH1 through CH6/CH7), with COM pin serving as common-mode reference.
It requires an external reference voltage applied at VREF (2.500V typical), while REFADJ enables ±1.5% adjustment of the reference buffer gain. The device features three-level SHDN control (low = shutdown, high = internal compensation, float = external compensation) and automatic power-down after conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 0.0244% of full-scale range for precise industrial and medical measurements. |
| Supply Voltage Range | +2.7V to +5.25V - enables direct operation from Li-ion, 3.3V, or 5V rails without LDO regulation. |
| Conversion Rate | 133ksps (with 2MHz external clock) - sufficient for real-time monitoring of sensor signals up to ~65kHz bandwidth. |
| INL (Integral Nonlinearity) | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale error across temperature (0°C to +70°C). |
| Power Consumption | 1.2mA at 133ksps / 54µA at 1ksps / 1µA in power-down - extends battery life in portable instrumentation. |
| Reference Requirement | External 2.500V reference at VREF pin - decouples accuracy from supply variation and enables calibrated multi-device systems. |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire - interoperates with standard microcontroller peripherals without level-shifting or glue logic. |
Pinout & Package
MAX147BCPP is housed in a 20-pin plastic DIP (Dual In-line Package) with 0.3-inch body width, through-hole mounting, and industry-standard pin spacing (0.1 inch). Pin 1 is marked by a notch or dot; pins are numbered counter-clockwise from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Support 8 single-ended or 4 differential (CH0/CH1, CH2/CH3, etc.) acquisitions; each input protected to AGND −0.3V / VDD +0.3V. |
| COM (Pin 9) | Analog common reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion. |
| SHDN (Pin 10) | Three-level shutdown control | Pulled low → full shutdown (1µA); pulled high → internal compensation; floated → external compensation mode. |
| VREF (Pin 11) | Reference input/output | Accepts external 2.500V reference; internal buffer disabled when REFADJ = VDD - required for MAX147 operation. |
| REFADJ (Pin 12) | Reference buffer gain adjust | Enables ±1.5% fine-tuning of reference buffer output; tie to VDD to disable buffer for external reference use. |
| DOUT (Pin 15) | Serial data output | MSB-first, SCLK-falling-edge aligned; high-impedance when CS = high - supports bus sharing. |
| AGND (Pin 13), DGND (Pin 14) | Analog/digital ground returns | Separate AGND/DGND pins minimize digital noise coupling into analog path - mandatory for <±1 LSB accuracy. |
| SCLK (Pin 19), DIN (Pin 17), CS (Pin 18), SSTRB (Pin 16) | Serial interface control | SCLK clocks data in/out; CS enables interface; SSTRB pulses before MSB in external clock mode - synchronizes DSP capture. |
| VDD (Pin 20) | Positive supply | Single +2.7V to +5.25V rail powers entire signal chain - no separate AVDD/DVDD required. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Unipolar (0V to VREF) or bipolar (±VREF/2) and single-ended/differential selection via 8-bit control byte - eliminates external signal conditioning for mixed-signal systems. |
| Low-power adaptive operation | Auto-shutdown after conversion + quick wake-up (<1.5µs acquisition time) enables µA-level average current at low sampling rates - ideal for duty-cycled sensors. |
| High-accuracy reference interface | External VREF input with ±1.5% REFADJ adjustment and 0.35mV load regulation - supports calibration traceability and multi-ADC synchronization. |
| Robust analog input protection | Internal clamping diodes limit CHx/COM to AGND −0.3V / VDD +0.3V - withstands ESD and overvoltage transients without external TVS. |
| Flexible serial timing | Compatible with SPI (CPOL=0, CPHA=0), QSPI (≤2MHz), and MICROWIRE - reduces firmware porting effort across MCU platforms. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over weeks. IC Role / Device Role / Timing Role: Primary ADC acquiring 8 analog sensor outputs sequentially with configurable gain and offset cancellation. Use Value: 1.2mA active current and 1µA shutdown enable >1-year battery life; external reference ensures long-term calibration stability across units. |
Use Scenario: Handheld ECG monitor digitizing lead-II differential signals with high common-mode rejection. IC Role / Device Role / Timing Role: Pseudo-differential ADC converting CH0/CH1 pair at 1ksps with bipolar ±1.25V range and 73dB SINAD. Use Value: Channel-to-channel offset matching ≤±0.25 LSB minimizes baseline drift; separate AGND/DGND pins suppress digital switching noise in analog front-end. |
| Battery-Powered Test Equipment | Industrial Process Monitoring |
Use Scenario: Pocket-sized multimeter measuring DC voltage, current, and resistance with auto-ranging. IC Role / Device Role / Timing Role: Configurable 12-bit ADC performing unipolar 0–2.5V conversions on multiple input paths via internal MUX. Use Value: Software-selectable single-ended/differential mode eliminates need for external op-amp reconfiguration; 133ksps supports fast continuity testing. |
Use Scenario: PLC analog input module acquiring 4–20mA loop signals from pressure and flow transmitters. IC Role / Device Role / Timing Role: High-accuracy ADC with external 2.500V reference enabling 0.1% system-level measurement repeatability. Use Value: ±1 LSB INL and ±0.5 LSB DNL ensure compliance with IEC 61000-4-3 immunity requirements; 20-pin DIP simplifies field-replaceable module design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, SPI-only interface; internal reference; 2.7–5.25V supply; 16-pin SOIC package. | Lacks differential input support and REFADJ adjustment; no SSTRB output for DSP sync. | Choose for simpler SPI-only systems where internal reference suffices and differential acquisition is unnecessary. |
| MAX11131ETE+ | 12-bit, 1MSPS, SPI/QSPI; internal reference; 2.7–3.6V supply only; 16-pin TQFN package. | Higher speed but narrower supply range; no external reference option or COM pin for pseudo-differential mode. | Prefer for high-throughput applications powered strictly from 3.3V, where board space constraints favor TQFN over DIP. |
Compared with ADS7822U and MAX11131ETE+, the MAX147BCPP uniquely combines external reference flexibility, pseudo-differential input capability, SSTRB synchronization, and through-hole DIP packaging - making it optimal for legacy-compatible, calibration-critical, and mixed-supply industrial designs.
Availability
MAX147BCPP is available at Aetrix Electronics and suitable for portable data logging, battery-powered test equipment, and industrial process monitoring requiring stable component supply and long-term obsolescence management.
Supply support for MAX147BCPP 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX146/MAX147 family was designed for low-power, high-accuracy data acquisition in resource-constrained environments - emphasizing flexible input configuration, minimal external components, and robust serial interfacing.
FAQ
What is the reference voltage requirement for MAX147BCPP?
The MAX147BCPP requires an external 2.500V reference applied to the VREF pin. Unlike the MAX146, it does not include an internal reference. The REFADJ pin allows ±1.5% adjustment of the reference buffer gain, and must be tied to VDD to disable the buffer when using an external reference - a mandatory configuration step for correct MAX147BCPP operation.
Does MAX147BCPP support differential input measurements?
Yes, MAX147BCPP supports pseudo-differential measurements across four channel pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. In differential mode, the device samples the voltage difference between the selected IN+ and IN− inputs, with COM serving as the return reference. Input stability of ±0.5 LSB on the IN− line relative to AGND is required during conversion to maintain accuracy.
What is the function of the SHDN pin on MAX147BCPP?
The SHDN pin on MAX147BCPP provides three-level control: pulled low → full shutdown (1µA supply current); pulled high → internal compensation mode for reference buffer; floated → external compensation mode. This enables flexible power management strategies, including automatic shutdown after conversion and rapid wake-up for burst-mode acquisition - critical for extending battery life in portable MAX147BCPP applications.
Which serial protocols is MAX147BCPP compatible with?
MAX147BCPP supports SPI (CPOL=0, CPHA=0), QSPI (up to 2MHz), and MICROWIRE protocols via its 4-wire interface (CS, SCLK, DIN, DOUT). It also provides SSTRB output for direct synchronization with TMS320-family DSPs. No external logic is needed for protocol compatibility, and the device operates with standard 3.3V or 5V logic levels - simplifying integration with diverse host processors.
What package type and temperature range does MAX147BCPP have?
MAX147BCPP is supplied in a 20-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. It is rated for operation from 0°C to +70°C ambient temperature - validated per the "C" grade specification in Maxim's ordering table. This makes it suitable for commercial and industrial indoor applications where thermal cycling is moderate and board-level rework is required.
MAX147BCPP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX147BCPP FAQ
1.How can I place an order for MAX147BCPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX147BCPP 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 MAX147BCPP reliable?
The price and inventory of MAX147BCPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX147BCPP is usually 5 days.
3.What payment methods are accepted for MAX147BCPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX147BCPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX147BCPP?
MAX147BCPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX147BCPP 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 MAX147BCPP?
For technical support, including MAX147BCPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX147BCPP requirements.
6.How does Aetrix verify that MAX147BCPP is sourced from the original manufacturer or authorized distributors?
All MAX147BCPP 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 MAX147BCPP meets industry standards.
7.What is the process for return or replacement of MAX147BCPP?
All MAX147BCPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX147BCPP, 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 MAX147BCPP part is unused and in its original packaging.
Return procedure for MAX147BCPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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