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Analog Devices Inc./Maxim Integrated MAX1241BCPA
- Part No.:
- MAX1241BCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1241BCPA.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,757
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Product details
Overview
MAX1241BCPA from Maxim Integrated is a low-power, 12-bit successive-approximation ADC with 73ksps throughput, 7.5µs conversion time, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It operates from +2.7V to +5.25V, requires an external reference (0V to VREF input range), and targets space-constrained, battery-powered data acquisition systems.
For engineers reviewing the MAX1241BCPA datasheet, MAX1241BCPA pinout, MAX1241BCPA application, or MAX1241BCPA equivalent, this page delivers verified electrical specs, validated pin functions, confirmed package mapping (8-pin PDIP), real-world use cases, and two technically documented alternative parts for design-in evaluation.
Technical Context
The MAX1241BCPA employs an internal track/hold with 1.5µs acquisition time and a 12-bit SAR architecture clocked by an on-chip oscillator. Its analog input accepts 0V to VREF signals, where VREF must be externally supplied and can range up to the positive supply rail (+5.25V).
It uses a unipolar binary output format with MSB-first serial data transmission, triggered by CS falling edge and synchronized to SCLK (up to 2.1MHz). Shutdown mode reduces supply current to ≤2µA, and wake-up delay is 4µs due to external reference dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes over full-scale input range |
| Throughput Rate | 73ksps - supports real-time sampling of signals up to ~36.5kHz Nyquist bandwidth |
| Conversion Time | 7.5µs - fixed latency from hold initiation to EOC assertion |
| Supply Voltage Range | +2.7V to +5.25V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and <0.024% full-scale error across temperature |
| Power Consumption | 3mW at 73ksps (VDD = 3.6V) - enables >100-hour operation on a 200mAh coin cell at 1ksps |
| Reference Input | External only - accepts 1.0V to VDD, requires ≤10Ω source impedance and ≥18kΩ DC load resistance |
Pinout & Package
MAX1241BCPA is housed in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch; lead finish is lead(Pb)-free/RoHS-compliant per ordering suffix '+'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +5.25V; powers analog and digital sections; bypass with 0.1µF + 4.7µF capacitors |
| AIN (Pin 2) | Analog input | Single-ended input referenced to GND; 0V to VREF range; protected to ±0.3V beyond supplies |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for ≤2µA shutdown; high or open for active mode; no internal reference enable (unlike MAX1240) |
| REF (Pin 4) | External reference input | Accepts 1.0V–VDD reference voltage; requires ≥0.1µF ceramic bypass; drives internal DAC and comparator |
| GND (Pin 5) | Analog/digital ground | Single-point star ground connection required; separates analog and digital return paths |
| SCLK (Pin 6) | Serial clock input | Asynchronous external clock up to 2.1MHz; duty cycle unrestricted if ≥200ns per phase |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; high state places DOUT in high-impedance tri-state |
| DOUT (Pin 8) | Serial data output | MSB-first unipolar binary stream; transitions on SCLK falling edge; EOC signaled by rising edge |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI, QSPI, and MICROWIRE protocols-no additional glue logic needed for MCU integration |
| Internal track/hold | 1.5µs acquisition time eliminates need for external hold capacitor and simplifies front-end design |
| Low-power shutdown | ≤2µA quiescent current enables energy harvesting and ultra-low-duty-cycle sensor node operation |
| Wide supply range | +2.7V to +5.25V operation supports legacy 5V systems and modern 3.3V embedded platforms |
| Small footprint | 8-pin PDIP package occupies <0.3 in² PCB area-ideal for compact portable instrumentation |
Applications
| Battery-Powered Data Loggers | Isolated Industrial Sensors |
|---|---|
Use Scenario: Continuous voltage monitoring of Li-ion battery cells in handheld medical devices with 6-month battery life. IC Role / Device Role / Timing Role: Primary ADC digitizing cell voltage at 1ksps; interfaces directly to MSP430 via SPI with CS-controlled burst reads. Use Value: 3mW active power and 2µA shutdown current extend runtime; 12-bit resolution captures 1mV changes across 0–2.5V range. |
Use Scenario: Analog signal conditioning in DIN-rail mounted temperature transmitters with galvanic isolation. IC Role / Device Role / Timing Role: Isolated-side ADC converting 4–20mA loop-derived voltage; synchronized to isolated µC via optocoupled SCLK/CS. Use Value: External reference support allows precise ratiometric measurement against isolated 2.5V reference; 73ksps handles transient fault detection. |
| Portable Environmental Monitors | Process Control I/O Modules |
Use Scenario: Multi-sensor air quality logger (CO₂, VOC, humidity) powered by solar-charged LiPo battery. IC Role / Device Role / Timing Role: Shared ADC for multiplexed analog channels; CS toggled per channel; DOUT read during low-power sleep intervals. Use Value: 1.5µs track/hold time enables accurate sampling of high-Z electrochemical sensors; 8-pin PDIP eases hand-soldering in low-volume production. |
Use Scenario: Retrofit analog input card for legacy PLC systems requiring 12-bit precision and 5V-tolerant digital interface. IC Role / Device Role / Timing Role: Front-end ADC in modular I/O slot; driven by PLC backplane clock; outputs serial data to FPGA-based protocol engine. Use Value: +2.7V to +5.25V supply range matches PLC 5V rails; SPI compatibility avoids custom interface firmware; ±1 LSB INL meets industrial calibration requirements. |
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 | 2.7V–5.25V supply; 12-bit SAR; 200ksps; SPI-compatible; internal reference optional but not disabled via SHDN | Higher speed and integrated reference simplify design but increase quiescent current (1.2mA vs. 1.6mA at 73ksps) | Select when higher throughput or internal reference flexibility is prioritized over minimal shutdown current |
| AD7893AN-10 | 12-bit SAR; 100ksps; 5V-only supply (4.75V–5.25V); SPI-compatible; external reference only; no shutdown pin | Lacks shutdown mode and wide-supply flexibility; requires external power management circuitry for battery use | Select for fixed 5V industrial systems where lowest cost and proven field reliability outweigh power optimization needs |
Compared with ADS7822U and AD7893AN-10, the MAX1241BCPA uniquely balances ultra-low shutdown current (≤2µA), wide supply range (+2.7V to +5.25V), and guaranteed ±1 LSB INL in an 8-pin PDIP-making it optimal for portable, battery-sensitive, and mixed-voltage designs where layout simplicity and long service life are critical.
Availability
MAX1241BCPA is available at Aetrix Electronics and suitable for battery-powered systems, portable data logging, isolated data acquisition, and process control applications requiring stable component supply across extended product lifecycles.
Supply support for MAX1241BCPA 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 and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX1240/MAX1241 family was engineered specifically for low-power, space-constrained data acquisition-emphasizing single-supply operation, integrated timing, and minimal external components in 8-pin packages.
FAQ
What is the reference voltage requirement for MAX1241BCPA?
The MAX1241BCPA requires an external reference voltage applied to the REF pin, ranging from 1.0V to VDD (up to +5.25V). It does not include an internal reference. For optimal accuracy, the reference must have ≤10Ω output impedance and be bypassed with ≥0.1µF ceramic capacitance. The MAX1241BCPA's full-scale range is 0V to VREF, so a 2.500V reference yields 610µV per LSB.
Does MAX1241BCPA support SPI, QSPI, and MICROWIRE protocols?
Yes, the MAX1241BCPA's 3-wire serial interface is fully compatible with SPI, QSPI, and MICROWIRE standards. It uses CPOL = 0 and CPHA = 0 configuration. Data is MSB-first, unipolar binary, with end-of-conversion signaled by DOUT rising edge. QSPI mode allows full 12-bit readout in exactly 13 clock cycles without trailing zeros.
What is the shutdown current and wake-up time for MAX1241BCPA?
The MAX1241BCPA draws ≤2µA in shutdown mode (SHDN = low). Its wake-up time is 4µs-the time from SHDN deassertion to when a new conversion may be initiated. This fast recovery is enabled by its external reference architecture, which remains active during shutdown, eliminating reference stabilization delays.
Can MAX1241BCPA operate from a 3.3V supply?
Yes, the MAX1241BCPA operates reliably from +2.7V to +5.25V, including standard 3.3V supplies. At VDD = 3.3V, typical supply current is 1.6mA at 73ksps and ≤2µA in shutdown. The 3.3V supply also powers the digital interface, ensuring direct compatibility with 3.3V microcontrollers without level translation.
What package type is used for MAX1241BCPA?
The MAX1241BCPA is packaged in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and through-hole leads. The ordering suffix "PA" explicitly denotes this PDIP variant, and the "+" indicates lead(Pb)-free/RoHS-compliant construction per JEDEC J-STD-609.
MAX1241BCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 73k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1241BCPA FAQ
1.How can I place an order for MAX1241BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241BCPA 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 MAX1241BCPA reliable?
The price and inventory of MAX1241BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241BCPA is usually 5 days.
3.What payment methods are accepted for MAX1241BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241BCPA?
MAX1241BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241BCPA 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 MAX1241BCPA?
For technical support, including MAX1241BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241BCPA requirements.
6.How does Aetrix verify that MAX1241BCPA is sourced from the original manufacturer or authorized distributors?
All MAX1241BCPA 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 MAX1241BCPA meets industry standards.
7.What is the process for return or replacement of MAX1241BCPA?
All MAX1241BCPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241BCPA, 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 MAX1241BCPA part is unused and in its original packaging.
Return procedure for MAX1241BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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