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Analog Devices Inc./Maxim Integrated MAX1241CCSA+T
- Part No.:
- MAX1241CCSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241CCSA+T.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
MAX1241CCSA+T from Maxim Integrated is a low-power, 12-bit successive-approximation analog-to-digital converter (ADC) with 73ksps throughput, 7.5µs conversion time, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It operates from a single +2.7V to +5.25V supply, requires an external reference (0V to VREF input range), and targets space-constrained, battery-powered data acquisition systems.
For engineers reviewing the MAX1241CCSA+T datasheet, MAX1241CCSA+T pinout, MAX1241CCSA+T application, or MAX1241CCSA+T equivalent, this page delivers verified electrical specs, validated SO-8 pin mapping, real-world use cases in isolated sensing and portable instrumentation, and two confirmed alternative ADCs with documented functional and interface differences.
Technical Context
The MAX1241CCSA+T implements a track/hold stage with 1.5µs acquisition time and a 12-bit SAR core using internal capacitive DAC architecture. It accepts analog inputs from 0V to VREF (up to VDD), supports unipolar coding, and uses an external clock for serial readout-conversion itself is self-timed and independent of SCLK.
Its 3-wire interface (SCLK, CS, DOUT) operates up to 2.1MHz with no duty-cycle restriction beyond 200ns minimum high/low pulse width. Shutdown mode reduces supply current to ≤2µA, and wake-up delay depends on external REF bypass capacitance and VDD level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with no missing codes over temperature. |
| Throughput Rate | 73ksps - full conversion cycle completed in 7.5µs, enabling real-time sampling of signals up to ~36.5kHz Nyquist bandwidth. |
| INL | ±1 LSB - ensures monotonicity and <0.024% full-scale linearity error for precision sensor digitization. |
| Supply Range | +2.7V to +5.25V - supports direct connection to 3.3V or 5V logic rails without level-shifting. |
| Power (73ksps) | 3mW at VDD = 3.6V - enables operation in ultra-low-power embedded systems with thermal constraints. |
| Reference Input | External 0V to VREF - accepts stable references up to VDD; requires ≥18kΩ DC impedance and ≤10Ω AC source impedance for specified accuracy. |
| Interface Compatibility | SPI/QSPI/MICROWIRE - interoperable with standard microcontroller serial peripherals using CPOL=0, CPHA=0 configuration. |
Pinout & Package
MAX1241CCSA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free (+ suffix). The package measures 4.9mm × 3.9mm × 1.75mm (JEDEC MS-012), with gull-wing leads and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +5.25V; powers analog and digital sections; requires 0.1µF + 4.7µF bypassing at REF and local VDD/GND. |
| AIN (Pin 2) | Analog input | Single-ended input with 0V to VREF range; protected to GND −0.3V / VDD +0.3V; source impedance ≤1kΩ recommended for full AC performance. |
| SHDN (Pin 3) | Three-level shutdown control | Pulled low → 2µA shutdown; open or high → active mode; open disables internal reference (not used in MAX1241). |
| REF (Pin 4) | Reference voltage terminal | Input for external reference (0V to VDD); must be bypassed with ≥0.1µF ceramic capacitor; drives internal DAC and sets full-scale. |
| GND (Pin 5) | Analog/digital common ground | Single-point star ground required; separates analog and digital return paths to minimize noise coupling into conversion path. |
| DOUT (Pin 6) | Serial data output | 3-state output enabled when CS is low; outputs MSB-first unipolar code with leading EOC bit; transitions on SCLK falling edge. |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion and enables DOUT; rising edge disables DOUT after minimum tCS (240ns) hold time. |
| SCLK (Pin 8) | Serial clock input | Asynchronous external clock up to 2.1MHz; clocks out conversion result; must remain low during conversion phase. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power 73ksps operation | 3mW at 3.6V - enables continuous sampling in battery-powered devices with >1-year runtime on coin cells. |
| Self-contained track/hold | 1.5µs acquisition time with no external hold capacitor - simplifies layout and eliminates drift-prone external components. |
| Flexible reference interface | Supports precision external references (e.g., REF5025) with 18kΩ min input impedance - allows system-level reference sharing and improved channel matching. |
| Robust serial interface | 3-wire SPI/QSPI/MICROWIRE compatibility with 2.1MHz max clock - integrates directly with ARM Cortex-M, PIC, and MSP430 MCUs without glue logic. |
| Fast shutdown recovery | 4µs wake-up time from shutdown - permits burst-mode sampling with minimal latency penalty between conversions. |
Applications
| Battery-Powered Data Loggers | Isolated Industrial Sensors |
|---|---|
Use Scenario: Compact environmental monitors logging temperature, humidity, and pressure over weeks on AA batteries. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; interfaces via SPI to low-power MCU in sleep/wake cycles. Use Value: 2µA shutdown current extends battery life; 73ksps throughput captures transient events; SO-8 footprint minimizes PCB area. |
Use Scenario: DIN-rail mounted current/voltage transducers with galvanic isolation feeding PLC analog inputs. IC Role / Device Role / Timing Role: Isolated-side ADC converting sensor signals before opto-coupled or digital isolator transmission. Use Value: External reference support enables precise scaling across multiple channels; ±1 LSB INL ensures repeatability in closed-loop control. |
| Portable Medical Instrumentation | Process Control Loop Interfaces |
Use Scenario: Handheld blood glucose meters or ECG front-ends requiring clinical-grade accuracy and low power. IC Role / Device Role / Timing Role: Signal-chain ADC acquiring biopotential waveforms; synchronized to MCU timer for fixed-rate sampling. Use Value: 70dB SINAD and 80dB SFDR meet IEC 60601-2-27 ECG noise requirements; 12-bit resolution supports 4096-level dynamic range. |
Use Scenario: Smart transmitter modules in chemical plants digitizing 4–20mA loop signals with HART communication capability. IC Role / Device Role / Timing Role: High-stability ADC referenced to system master reference; provides calibrated digital output for microcontroller processing. Use Value: ±1 LSB INL and ±1 LSB DNL ensure <0.025% total error over temperature; external REF allows traceable calibration against metrology standards. |
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-only interface, no SHDN pin, internal reference only. | Higher speed but lacks shutdown control and external reference flexibility; requires separate reference IC for precision scaling. | Select when maximum throughput >100ksps is required and system reference is centralized; avoid if low-power shutdown or external REF routing is needed. |
| AD7476AARMZ | 2.35V–5.25V supply, 12-bit SAR, 1MSPS, SPI interface, 350nA shutdown, internal reference only. | 10× faster sampling but higher power (3.5mW @ 1MSPS); no external REF option; smaller 8-lead MSOP package. | Choose for high-speed control loops where latency matters more than power; not suitable for battery-powered designs needing flexible reference architecture. |
Compared with ADS7822U and AD7476AARMZ, MAX1241CCSA+T uniquely balances ultra-low shutdown current (2µA), external reference support, and proven 73ksps performance in SO-8 - making it optimal for portable, isolated, or multi-channel precision acquisition where power, flexibility, and layout simplicity are co-prioritized.
Availability
MAX1241CCSA+T is available at Aetrix Electronics and suitable for battery-powered data loggers, isolated industrial sensors, portable medical instrumentation, and process control loop interfaces requiring stable component supply and long-term production continuity.
Supply support for MAX1241CCSA+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 demanding industrial, medical, and communications applications.
The MAX1240/MAX1241 product line delivers low-power, small-footprint 12-bit ADCs optimized for remote sensing, portable instrumentation, and space-constrained embedded systems requiring high accuracy and minimal supply current.
FAQ
What is the reference voltage requirement for MAX1241CCSA+T?
The MAX1241CCSA+T requires an external reference voltage applied to the REF pin, ranging from 1.0V to VDD. For full 12-bit accuracy, the reference must have ≤10Ω output impedance and be bypassed with ≥0.1µF ceramic capacitance. When VREF = 2.500V, 1 LSB equals 610µV. The MAX1241CCSA+T does not include an internal reference - that feature is exclusive to the MAX1240 family.
Does MAX1241CCSA+T support SPI mode with CPOL=0 and CPHA=0?
Yes, MAX1241CCSA+T fully supports SPI mode with CPOL=0 and CPHA=0. In this configuration, CS falling edge initiates conversion, DOUT goes low during conversion and high at completion (EOC), and data shifts out MSB-first on SCLK falling edges. The first bit is always a leading '1' indicating end-of-conversion, followed by 12 data bits - requiring at least 13 clock cycles for full readout.
What is the maximum allowable source impedance for the AIN pin on MAX1241CCSA+T?
The MAX1241CCSA+T specifies a maximum recommended source impedance of 1kΩ for the AIN pin to maintain full AC performance (SINAD, THD). Higher impedances increase acquisition time per tACQ = 9(RS + RIN) × 16pF, where RIN = 9kΩ. For RS > 1kΩ, a 0.01µF capacitor at AIN is advised to limit bandwidth and stabilize sampling, though this reduces usable signal frequency range.
How does shutdown mode operate on MAX1241CCSA+T?
Shutdown mode on MAX1241CCSA+T is activated by pulling the SHDN pin low, reducing supply current to ≤2µA. The device wakes up in 4µs after SHDN is deasserted, allowing rapid burst-mode sampling. Unlike the MAX1240, SHDN has no effect on reference selection in the MAX1241CCSA+T - the internal reference is absent, so REF is always an external input regardless of SHDN state.
What package type and RoHS status does MAX1241CCSA+T use?
MAX1241CCSA+T uses an 8-pin SO (Small Outline) package per JEDEC MS-012, measuring 4.9mm × 3.9mm × 1.75mm with 1.27mm lead pitch. The '+T' suffix confirms it is tape-and-reel packaged and RoHS-compliant (lead-free), as indicated by the '+' in the ordering code per Maxim's packaging nomenclature.
MAX1241CCSA+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:
- -
MAX1241CCSA+T FAQ
1.How can I place an order for MAX1241CCSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241CCSA+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 MAX1241CCSA+T reliable?
The price and inventory of MAX1241CCSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241CCSA+T is usually 5 days.
3.What payment methods are accepted for MAX1241CCSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241CCSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241CCSA+T?
MAX1241CCSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241CCSA+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 MAX1241CCSA+T?
For technical support, including MAX1241CCSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241CCSA+T requirements.
6.How does Aetrix verify that MAX1241CCSA+T is sourced from the original manufacturer or authorized distributors?
All MAX1241CCSA+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 MAX1241CCSA+T meets industry standards.
7.What is the process for return or replacement of MAX1241CCSA+T?
All MAX1241CCSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241CCSA+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 MAX1241CCSA+T part is unused and in its original packaging.
Return procedure for MAX1241CCSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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