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Analog Devices Inc./Maxim Integrated MAX1241CCSA
- Part No.:
- MAX1241CCSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241CCSA.pdf
- Description:
- MAX1241 2.7V, LOW-POWER, 12-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,455
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Product details
Overview
The MAX1241CCSA from Maxim Integrated is a low-power, 12-bit successive-approximation analog-to-digital converter (ADC) operating from a single +2.7V to +5.25V supply. It features a 7.5µs conversion time, internal track/hold, on-chip clock, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. Designed for space-constrained, battery-powered data acquisition, it delivers 73ksps throughput with only 3mW power at 3V.
For engineers reviewing the MAX1241CCSA datasheet, MAX1241CCSA pinout, MAX1241CCSA application, or MAX1241CCSA equivalent, this page provides verified technical context, real-world design meaning of key specs, package-validated pin functions, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX1241CCSA uses a capacitive SAR architecture with integrated track/hold, requiring no external hold capacitor. Its unipolar input range spans 0V to VREF, where VREF is externally supplied and must be stable within ±0.3V of GND to VDD+0.3V.
Conversion is initiated by a falling edge on CS; DOUT transitions high to signal end-of-conversion (EOC), then outputs 13 bits (1 leading EOC bit + 12 data bits, MSB-first) synchronized to SCLK's falling edge. The device supports clock rates up to 2.1MHz with unrestricted duty cycle, provided each phase ≥200ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog measurement |
| Throughput Rate | 73ksps - supports real-time sampling of signals up to ~36.5kHz Nyquist bandwidth |
| Conversion Time | 7.5µs - defines minimum inter-conversion interval in continuous mode |
| Supply Voltage Range | +2.7V to +5.25V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting |
| Power Consumption | 3mW at 73ksps (VDD = 3V) - enables >100-hour operation on a 200mAh coin cell at 1ksps |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and <0.024% full-scale error after calibration |
| Aperture Jitter | <50ps - limits SNR degradation to <0.1dB at 10kHz input, critical for undersampling |
Pinout & Package
MAX1241CCSA is housed in an 8-pin SO (Small Outline) package with gull-wing leads, RoHS-compliant and lead-free (+ suffix). Pin pitch is 1.27mm; body dimensions are 4.9mm × 3.9mm × 1.75mm (JEDEC MS-012).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +5.25V; powers analog core, digital logic, and internal track/hold |
| AIN (Pin 2) | Analog input | Unipolar input node referenced to GND and VREF; 0V to VREF range, protected to GND−0.3V/VDD+0.3V |
| SHDN (Pin 3) | Three-level shutdown control | Pulled low → 15µA shutdown; open → enables external reference; high → enables internal ref (not used in MAX1241) |
| REF (Pin 4) | Reference voltage terminal | External reference input (MAX1241); requires ≥0.1µF bypass; accepts 1.0V to VDD, ≤10Ω source impedance |
| GND (Pin 5) | Analog/digital common ground | Single-point star ground connection required; separates analog and digital return paths |
| SCLK (Pin 6) | Serial clock input | Asynchronous master clock up to 2.1MHz; controls DOUT timing; 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 mode |
| DOUT (Pin 8) | Serial data output | 3-wire interface output; EOC flag (MSB = 1) followed by 12-bit result; transitions on SCLK falling edge |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI/QSPI/MICROWIRE protocols using CPOL=0, CPHA=0 - eliminates need for dedicated ADC controller hardware |
| Internal track/hold | 1.5µs acquisition time with no external capacitor - simplifies front-end design and reduces board area |
| Low-power shutdown mode | 15µA max supply current in shutdown - enables µA-level system sleep states between measurements |
| Wide supply range | +2.7V to +5.25V operation - supports direct integration into both 3.3V and 5V industrial sensor nodes |
| On-chip clock generator | Eliminates external crystal or oscillator - reduces BOM count and layout sensitivity to clock routing |
Applications
| Portable Data Logging | Battery-Powered Systems |
|---|---|
Use Scenario: Standalone temperature/humidity logger recording every 10 seconds using coin-cell power. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned sensor outputs; handles autonomous sampling via microcontroller-triggered CS pulses. Use Value: 3mW active power and 15µA shutdown enable >2-year battery life; 8-pin SO footprint minimizes PCB area in compact enclosures. |
Use Scenario: Wireless sensor node with BLE MCU acquiring analog sensor data before transmission. IC Role / Device Role / Timing Role: Low-latency ADC interfaced directly to MCU GPIOs; leverages existing SPI peripheral without added level shifters. Use Value: Single-supply +2.7V–+5.25V operation matches MCU I/O voltage; 7.5µs conversion allows rapid wake-up/sleep cycling to extend battery runtime. |
| Isolated Data Acquisition | Process Control |
Use Scenario: 4–20mA loop-powered transmitter with galvanic isolation measuring field sensor signals. IC Role / Device Role / Timing Role: Isolated-side ADC converting isolated analog inputs; synchronized via opto-isolated CS/SCLK signals. Use Value: 0V–VREF input range accommodates isolated ±10V or 0–5V signals with external scaling; low EMI susceptibility due to internal T/H and small package. |
Use Scenario: PLC analog input module digitizing 0–10V or 4–20mA process signals in factory automation. IC Role / Device Role / Timing Role: High-accuracy front-end ADC in multi-channel scan architecture; daisy-chained via shared SCLK/CS lines. Use Value: ±1 LSB INL ensures calibrated linearity across temperature; 73ksps throughput supports 10-channel scanning at 7ksps/channel. |
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, +2.7V–+5.25V, SPI-only interface, no SHDN pin, 8-pin SOIC | Higher speed but lacks shutdown control; requires external reference; no internal T/H - needs external sample-hold for AC-coupled signals | Select when maximum throughput >100ksps is required and shutdown control is unnecessary. |
| AD7476ARMZ | 12-bit, 1MSPS, +2.35V–+5.25V, SPI interface, 6-pin SOT-23, no internal T/H, no SHDN | Smaller package and higher speed, but no track/hold or shutdown; requires external RC filter for anti-aliasing and stable reference decoupling | Select for ultra-compact, high-speed single-shot sampling where board space is critical and continuous acquisition is not needed. |
Compared with ADS7822U and AD7476ARMZ, the MAX1241CCSA uniquely combines integrated track/hold, programmable shutdown, and guaranteed ±1 LSB INL in an 8-pin SO package - making it optimal for battery-operated, multi-sample-per-second data loggers requiring precision and low quiescent power.
Availability
MAX1241CCSA is available at Aetrix Electronics and suitable for portable data logging, battery-powered systems, isolated data acquisition, and process control applications requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for MAX1241CCSA 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, high-accuracy 12-bit ADCs optimized for remote sensing and space-constrained data acquisition systems where supply flexibility and minimal external components are essential.
FAQ
What is the reference voltage requirement for MAX1241CCSA?
The MAX1241CCSA requires an external reference voltage applied to the REF pin, ranging from +1.0V to VDD. For full 12-bit accuracy, the reference must be stable, have ≤10Ω output impedance, and be bypassed with ≥0.1µF ceramic capacitor. Unlike the MAX1240, the MAX1241CCSA has no internal reference - the SHDN pin does not enable one.
Does MAX1241CCSA support SPI mode 0,0 (CPOL=0, CPHA=0)?
Yes, MAX1241CCSA fully supports SPI mode 0,0. CS falling edge initiates conversion; DOUT goes low during conversion and high at completion (EOC). Data is clocked out MSB-first on SCLK's falling edge, with the first bit always '1' (EOC flag), followed by 12 data bits - matching standard SPI frame timing without modifications.
What is the minimum acquisition time for MAX1241CCSA, and how does source impedance affect it?
The guaranteed minimum acquisition time (tACQ) for MAX1241CCSA is 1.5µs. However, actual acquisition time depends on source impedance: tACQ = 9(RS + 9kΩ) × 16pF. For RS < 1kΩ, tACQ remains ~1.5µs; above that, it increases linearly - e.g., RS = 10kΩ yields ~1.6µs. Exceeding tACQ degrades INL and THD performance.
Can MAX1241CCSA operate from a 5V supply while interfacing with a 3.3V microcontroller?
Yes. MAX1241CCSA operates from +2.7V to +5.25V, and its digital I/O (SCLK, CS, DOUT) are CMOS-compatible with VDD-referenced thresholds. When VDD = 5V, VIH(min) = 0.7×VDD = 3.5V - exceeding typical 3.3V MCU VOH. Therefore, a level shifter or resistor divider is required on CS/SCLK inputs, but DOUT can drive 3.3V inputs directly if VDD ≤ 3.6V (per datasheet VOH spec).
What is the purpose of the SHDN pin on MAX1241CCSA, and how should it be configured?
On MAX1241CCSA, the SHDN pin is a three-level control: pulled low → 15µA shutdown; left open → normal operation with external reference; pulled high → no effect (internal reference is absent). For lowest power, tie SHDN to GND between conversions. Do not float SHDN in noisy environments - use pull-down resistor if driven by open-drain MCU pin.
MAX1241CCSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- -
- 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 FAQ
1.How can I place an order for MAX1241CCSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241CCSA 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 reliable?
The price and inventory of MAX1241CCSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241CCSA is usually 5 days.
3.What payment methods are accepted for MAX1241CCSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241CCSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241CCSA?
MAX1241CCSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241CCSA 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?
For technical support, including MAX1241CCSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241CCSA requirements.
6.How does Aetrix verify that MAX1241CCSA is sourced from the original manufacturer or authorized distributors?
All MAX1241CCSA 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 meets industry standards.
7.What is the process for return or replacement of MAX1241CCSA?
All MAX1241CCSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241CCSA, 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 part is unused and in its original packaging.
Return procedure for MAX1241CCSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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