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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:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
MAX1241CCSA+ 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 delivers ±1 LSB INL at 0°C to +70°C - ideal for portable data logging and isolated sensor interfaces where supply flexibility and space-constrained PCB layout are critical.
For engineers reviewing the MAX1241CCSA+ datasheet, MAX1241CCSA+ pinout, MAX1241CCSA+ application, or MAX1241CCSA+ equivalent, key selection considerations include its single-supply wide-voltage operation (+2.7V to +5.25V), external reference dependency, 8-pin SO package footprint, shutdown current of ≤2µA, and compatibility with microcontroller I/O ports without level-shifting.
Technical Context
The MAX1241CCSA+ implements a capacitor-based SAR architecture with integrated track/hold, eliminating need for external hold capacitors. Its conversion cycle begins on CS falling edge, uses internal clocking, and outputs unipolar 12-bit data MSB-first with leading EOC bit via DOUT synchronized to external SCLK.
It operates in two distinct power states: normal mode (1.9mA typical at VDD = 3.6V, 73ksps) and shutdown mode (≤2µA), with wake-up delay dependent on external REF bypass capacitance. The REF pin accepts 1.0V to VDD reference inputs with ≤10Ω source impedance and ≥18kΩ DC input resistance.
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 |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and <0.024% full-scale error for precision measurement |
| Supply Voltage Range | +2.7V to +5.25V - enables direct interfacing with 3.3V or 5V microcontrollers without regulators |
| Power Consumption | 3mW at 73ksps (VDD = 3.6V) - allows battery operation >1 year in 1ksps duty-cycled systems |
| Reference Input | External only (0V to VREF) - requires stable external reference; no internal reference circuitry |
| Serial Interface | SPI/QSPI/MICROWIRE 3-wire - uses SCLK, CS, DOUT; no MISO/MOSI complexity; compatible with standard MCU peripherals |
Pinout & Package
MAX1241CCSA+ is housed in an 8-pin SO (Small Outline) package with gull-wing leads, 1.27mm pitch, and JEDEC MS-012AC compliant dimensions (4.9mm × 3.9mm × 1.75mm). Pin 1 is marked by notch or dot; device is RoHS-compliant and lead(Pb)-free (+ suffix).
| 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 node | Single-ended input referenced to GND; 0V to VREF range; protected to ±0.3V beyond rails |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for ≤2µA shutdown; high or open for active operation; no internal reference enable (unlike MAX1240) |
| REF (Pin 4) | External reference input | DC-coupled reference voltage input (1.0V to VDD); must drive ≤10Ω source impedance during conversion |
| 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 external clock up to 2.1MHz; clocks data out on falling edge; duty cycle unrestricted if ≥200ns per phase |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; holds DOUT in high-impedance when high; minimum pulse width 240ns |
| DOUT (Pin 8) | Serial data output | 3-state output; drives MSB-first unipolar data with leading EOC bit; transitions on SCLK falling edge |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | +2.7V to +5.25V operation eliminates need for dedicated ADC supply rails in mixed-voltage systems |
| Low-power shutdown | ≤2µA shutdown current enables energy harvesting or coin-cell operation in intermittent-sampling applications |
| Integrated track/hold | 1.5µs acquisition time with no external capacitor simplifies front-end design and reduces BOM count |
| Microcontroller-friendly interface | 3-wire SPI-compatible protocol connects directly to GPIO or hardware SPI peripherals without glue logic |
| Robust reference handling | Supports reference voltages from 1.0V to VDD with specified accuracy, enabling flexible scaling of input range |
Applications
| Battery-Powered Sensor Node | Isolated Industrial Data Acquisition |
|---|---|
Use Scenario: Remote temperature/humidity monitoring using low-quiescent-current LDO and lithium-thionyl chloride battery. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned sensor outputs; samples at 1–10ksps with periodic shutdown between readings. Use Value: 3mW active power and ≤2µA shutdown extend battery life beyond 5 years; 8-pin SO footprint minimizes PCB area in compact enclosures. |
Use Scenario: Analog signal conditioning in DIN-rail-mounted PLC I/O module with opto-isolated digital interface. IC Role / Device Role / Timing Role: Isolated-side ADC capturing 4–20mA loop signals after resistive conversion; synchronized to host controller via isolated SPI. Use Value: External reference support allows precise matching to system-wide reference; 73ksps throughput captures transients in motor control feedback loops. |
| Portable Medical Instrumentation | Process Control Transmitter |
Use Scenario: Handheld blood glucose meter with electrochemical sensor and LCD display powered by AAA batteries. IC Role / Device Role / Timing Role: High-accuracy ADC converting amperometric sensor current to digital value; calibrated against factory-trimmed reference. Use Value: ±1 LSB INL ensures clinical-grade linearity; 12-bit resolution provides sufficient dynamic range for sub-millivolt signal detection. |
Use Scenario: Smart 4–20mA HART-enabled pressure transmitter with onboard microcontroller and analog front end. IC Role / Device Role / Timing Role: Primary ADC for primary sensor measurement; interfaces to HART modem via shared UART/SPI bus. Use Value: Wide supply range accommodates 12–42V loop-powered operation; external reference enables ratiometric measurement with excitation sources. |
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; no internal reference; 200ksps max; 8-pin SOIC | Higher speed but higher power (1.2mW @ 200ksps); lacks SHDN pin - requires external enable control | Select when throughput >73ksps is required and shutdown control is managed externally |
| AD7476ARMZ | 2.35V–5.25V supply; 12-bit; SPI interface; no internal reference; 1MSPS max; 8-pin MSOP | 10× faster sampling; smaller MSOP package; higher power (3.2mW @ 1MSPS); no dedicated SHDN pin | Select for high-speed data capture where size and speed outweigh ultra-low-power shutdown needs |
Compared with ADS7822U and AD7476ARMZ, the MAX1241CCSA+ offers uniquely low shutdown current (≤2µA), integrated SHDN functionality, and guaranteed 73ksps performance with minimal external components - making it optimal for battery longevity and simplified power sequencing in portable instrumentation.
Availability
MAX1241CCSA+ 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-term lifecycle support, and RoHS-compliant packaging.
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 industrial, medical, and communications applications.
The MAX1240/MAX1241 product line delivers low-power, small-footprint 12-bit ADCs optimized for space- and energy-constrained remote sensing and portable instrumentation systems.
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. It does not include an internal reference. For optimal accuracy, the reference must have ≤10Ω output impedance and be bypassed with ≥0.1µF ceramic capacitor near the REF pin. The MAX1241CCSA+ converts analog inputs from 0V to VREF, so full-scale resolution depends directly on this external reference stability and noise performance.
Does MAX1241CCSA+ support SPI mode 0,0 (CPOL=0, CPHA=0)?
Yes, the MAX1241CCSA+ is fully compatible with SPI mode 0,0 (CPOL=0, CPHA=0), as well as QSPI and MICROWIRE protocols. Its 3-wire interface uses CS falling edge to initiate conversion, and DOUT outputs MSB-first data on SCLK falling edges. No configuration registers or setup commands are needed - the MAX1241CCSA+ operates immediately upon correct timing alignment per Figure 8 and Figure 9 of its datasheet.
What is the maximum allowed source impedance for the AIN pin on MAX1241CCSA+?
The MAX1241CCSA+ specifies a maximum recommended source impedance of 1kΩ for the AIN pin to maintain full AC performance. Higher impedances increase acquisition time (tACQ = 9 × (RS + 9kΩ) × 16pF) and may degrade SNR and THD. If RS exceeds 1kΩ, a 0.01µF capacitor should be placed at AIN to form an RC filter, though this limits input signal bandwidth and requires careful anti-aliasing design.
How does the SHDN pin function on MAX1241CCSA+?
On the MAX1241CCSA+, the SHDN pin is a three-level control: pulling it low places the device in shutdown mode (≤2µA supply current); leaving it open or pulling it high enables normal operation. Unlike the MAX1240, the SHDN pin on MAX1241CCSA+ does not enable or disable an internal reference - the MAX1241CCSA+ has no internal reference and always requires an external REF voltage regardless of SHDN state.
What is the guaranteed INL specification for MAX1241CCSA+ over temperature?
The MAX1241CCSA+ guarantees ±1 LSB integral nonlinearity (INL) over its full operating temperature range of 0°C to +70°C. This specification is validated across process, voltage, and temperature corners and ensures monotonic behavior and predictable code transition points - critical for closed-loop control and calibration-sensitive applications where deviation from ideal transfer function must remain bounded.
MAX1241CCSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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+ 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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