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Analog Devices Inc./Maxim Integrated MAX1241BCSA+T
- Part No.:
- MAX1241BCSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241BCSA+T.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
MAX1241BCSA+T from Maxim Integrated is a low-power, 12-bit successive-approximation analog-to-digital converter (ADC) operating from +2.7V to +5.25V, featuring 73ksps throughput, 7.5µs conversion time, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It requires an external reference voltage (0V to VREF input range), supports 1.5µs track/hold acquisition, and targets space-constrained, battery-powered data acquisition systems.
For engineers reviewing the MAX1241BCSA+T datasheet, MAX1241BCSA+T pinout, MAX1241BCSA+T application, or MAX1241BCSA+T equivalent, this page delivers verified electrical specs, package mapping, functional pin roles, real-world use cases, and validated alternative parts - all grounded in Maxim's official 19-1155 Rev 5 documentation and SO-8 package validation.
Technical Context
The MAX1241BCSA+T implements a capacitive SAR architecture with integrated track/hold, eliminating need for external hold capacitors. Its analog front-end accepts inputs from 0V to VREF with ±1 LSB INL and ±1 LSB DNL over 0°C to +70°C, and features internal clock generation synchronized to external SCLK up to 2.1MHz.
Shutdown is controlled via the SHDN pin, reducing supply current to ≤2µA (typical) while preserving state; wake-up delay is 4µs (MAX1241) due to external reference dependency. The device uses unipolar binary output coding (MSB-first), with EOC signaled by DOUT high transition after conversion completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes across 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 CS falling edge to DOUT high (EOC) |
| Supply Voltage Range | +2.7V to +5.25V - enables direct interfacing with 3.3V or 5V microcontrollers without level-shifting |
| Reference Input | External only - REF pin accepts 1.0V to VDD, requiring ≥18kΩ source impedance and ≤10Ω output impedance |
| Power Consumption | 3mW at 73ksps (VDD = 3.6V) - enables >100-hour operation on coin-cell batteries in intermittent-sampling mode |
| INL / DNL | ±1 LSB max - ensures monotonicity and <0.024% full-scale linearity error for precision sensor digitization |
Pinout & Package
MAX1241BCSA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free (+ suffix), with 1.27mm pitch and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +5.25V; powers analog and digital sections; bypass with 0.1µF + 4.7µF to GND |
| AIN (Pin 2) | Analog input | Single-ended input referenced to GND; 0V to VREF range; protected to GND−0.3V / VDD+0.3V |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for ≤2µA shutdown; high or open for active mode; no internal reference enable (MAX1241 only) |
| REF (Pin 4) | Reference voltage terminal | External reference input (1.0V–VDD); must drive ≤10Ω source impedance and supply ≤250µA during conversion |
| GND (Pin 5) | Analog/digital common ground | Single-point star ground connection required; separates analog and digital return paths per layout guidelines |
| SCLK (Pin 6) | Serial clock input | Asynchronous master clock up to 2.1MHz; duty cycle unrestricted if ≥200ns per phase; clocks data out on falling edge |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; holds DOUT in high-Z when high; minimum pulse width 240ns |
| DOUT (Pin 8) | Serial data output | Three-state, MSB-first unipolar output; EOC signaled by rising edge; transitions on SCLK falling edge |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI/QSPI/MICROWIRE protocols (CPOL=0, CPHA=0), enabling plug-in integration with ARM Cortex-M, PIC, and MSP430 MCUs |
| Internal track/hold | 1.5µs acquisition time eliminates need for external sample-and-hold circuitry, reducing BOM count and PCB area |
| Low-power shutdown | ≤2µA typical shutdown current allows energy harvesting or battery-backed systems to extend operational lifetime between conversions |
| Wide supply range | +2.7V to +5.25V operation supports both 3.3V industrial sensors and legacy 5V controller ecosystems without regulators |
| Small SO-8 package | 5.0mm × 4.0mm footprint fits dense portable instrumentation layouts; compatible with standard reflow soldering profiles |
Applications
| Battery-Powered Sensor Node | Isolated Industrial Data Acquisition |
|---|---|
Use Scenario: Remote temperature/humidity monitoring using low-quiescent-current sensor ICs powered by CR2032 coin cell. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog outputs; operates in burst mode (1 sample/sec) with SHDN-controlled sleep cycles. Use Value: 3mW active power and 2µA shutdown enable >120-day battery life; SO-8 size minimizes PCB area in compact enclosure. |
Use Scenario: Analog signal conditioning in DIN-rail mounted PLC I/O modules with opto-isolated digital interfaces. IC Role / Device Role / Timing Role: Front-end ADC for isolated 4–20mA loop receivers; synchronized to host controller via SPI clock. Use Value: 73ksps throughput supports oversampling for noise reduction; external REF allows precise scaling to 16-bit-equivalent effective resolution. |
| Portable Data Logger | Process Control Transmitter |
Use Scenario: Handheld environmental logger capturing voltage outputs from gas sensors, accelerometers, and thermocouples. IC Role / Device Role / Timing Role: Central ADC with configurable sampling rate; interfaces directly to MCU GPIO without level shifters. Use Value: +2.7V–+5.25V supply range accommodates mixed-voltage sensor stack; 12-bit resolution meets ISO 8601 logging accuracy requirements. |
Use Scenario: Smart 4–20mA transmitter with HART communication, digitizing pressure/flow sensor bridges. IC Role / Device Role / Timing Role: Precision ADC for ratiometric bridge measurements; REF tied to excitation voltage for inherent drift cancellation. Use Value: ±1 LSB INL ensures <0.025% FSO error over temperature; SO-8 package enables conformal coating for harsh chemical environments. |
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; SPI interface; 200ksps; no internal T/H; requires external reference | Higher speed but lacks integrated track/hold - needs external op-amp buffer for high-Z sources | Select when >100ksps sampling is required and board space allows external signal conditioning. |
| AD7476AARMZ | 2.35V–5.25V supply; 12-bit; SPI interface; 1MSPS; internal T/H; external reference only | 10× faster throughput; higher power (3.7mW @ 1MSPS); smaller MSOP-8 package | Choose for high-speed control loops where latency <1µs is critical and power budget permits. |
Compared with ADS7822U and AD7476AARMZ, MAX1241BCSA+T offers optimal balance of ultra-low shutdown current (2µA), integrated 1.5µs track/hold, and proven robustness in battery-critical and space-constrained industrial logging - without demanding external support circuitry.
Availability
MAX1241BCSA+T 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, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX1241BCSA+T 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 markets, emphasizing low-power innovation and system-level integration.
The MAX1240/MAX1241 product line was engineered specifically for ultra-low-power, space-constrained data acquisition - delivering 12-bit accuracy with minimal external components and single-supply flexibility across 0°C to +70°C commercial operation.
FAQ
What is the reference voltage requirement for MAX1241BCSA+T?
The MAX1241BCSA+T requires an external reference applied to the REF pin, supporting 1.0V to VDD (up to +5.25V). It demands ≤10Ω source impedance and must supply up to 250µA during conversion. A minimum 0.1µF ceramic bypass capacitor is mandatory; 4.7µF is recommended for noisy references. Unlike the MAX1240, MAX1241BCSA+T has no internal reference.
Does MAX1241BCSA+T support SPI mode 0,0 (CPOL=0, CPHA=0)?
Yes, MAX1241BCSA+T is fully compatible with SPI mode 0,0. Its 3-wire interface uses CS falling edge to initiate conversion, DOUT transitions on SCLK falling edge, and outputs MSB-first unipolar data. The first bit is always '1' (EOC flag), followed by 12 data bits - matching standard SPI frame timing with CPOL=0 and CPHA=0 configuration.
What is the maximum sampling rate and corresponding conversion time for MAX1241BCSA+T?
The MAX1241BCSA+T achieves a maximum throughput rate of 73ksps, with a fixed conversion time of 7.5µs. This includes internal SAR settling and is independent of SCLK frequency. The 1.5µs track/hold acquisition time precedes conversion; total cycle time from CS fall to next CS fall is ≥13.7µs at full speed.
How does shutdown mode operate on MAX1241BCSA+T?
Driving SHDN low places MAX1241BCSA+T into shutdown, reducing supply current to ≤2µA (typical). Wake-up delay is 4µs - significantly faster than MAX1240 due to absence of internal reference recharge. SHDN high or open enables normal operation; no pull-up/pull-down is required, and the pin is three-state compatible.
What package type and footprint does MAX1241BCSA+T use?
MAX1241BCSA+T uses an 8-pin SO (Small Outline) package per JEDEC MS-012AC, with 1.27mm lead pitch, 5.0mm × 4.0mm body size, and RoHS-compliant / lead-free construction (+T suffix). It is compatible with standard reflow profiles and manual soldering; thermal pad is not present.
MAX1241BCSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1241BCSA+T FAQ
1.How can I place an order for MAX1241BCSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241BCSA+T 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 MAX1241BCSA+T reliable?
The price and inventory of MAX1241BCSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241BCSA+T is usually 5 days.
3.What payment methods are accepted for MAX1241BCSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241BCSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241BCSA+T?
MAX1241BCSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241BCSA+T 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 MAX1241BCSA+T?
For technical support, including MAX1241BCSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241BCSA+T requirements.
6.How does Aetrix verify that MAX1241BCSA+T is sourced from the original manufacturer or authorized distributors?
All MAX1241BCSA+T 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 MAX1241BCSA+T meets industry standards.
7.What is the process for return or replacement of MAX1241BCSA+T?
All MAX1241BCSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241BCSA+T, 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 MAX1241BCSA+T part is unused and in its original packaging.
Return procedure for MAX1241BCSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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