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Analog Devices Inc./Maxim Integrated MAX1241AESA
- Part No.:
- MAX1241AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241AESA.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,513
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Product details
Overview
MAX1241AESA from Maxim Integrated is a low-power, 12-bit successive-approximation analog-to-digital converter (ADC) operating from +2.7V to +5.25V supply, 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 track/hold acquisition in 1.5µs, and targets space-constrained, battery-powered data acquisition systems.
For engineers reviewing the MAX1241AESA datasheet, MAX1241AESA pinout, MAX1241AESA application, or MAX1241AESA equivalent, this page delivers verified electrical specs, validated SO-8 package mapping, confirmed timing behavior at 2.1MHz SCLK, and real-world use context for remote sensor interfaces and isolated measurement circuits.
Technical Context
The MAX1241AESA implements a capacitor-based SAR architecture with integrated track/hold, eliminating need for external hold capacitors. Its internal clock drives conversion, while external SCLK controls serial data readout - decoupling conversion timing from interface timing.
It operates in two distinct power states: normal mode (1.9mA typical at 3.6V, 73ksps) and shutdown mode (<2µA), with SHDN pin enabling reference control and wake-up sequencing. The REF pin accepts external references from +1.0V to VDD, with ≤10Ω output impedance required during conversion for specified accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit unipolar output - delivers 4096 discrete codes over full-scale range |
| Throughput Rate | 73ksps maximum - enables 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 - supports direct interfacing with 3.3V and 5V microcontrollers |
| Reference Input Range | 0V to VREF, with VREF = +1.0V to VDD - allows flexible scaling from 1V to 5.25V full-scale |
| INL (Integral Nonlinearity) | ±0.5 LSB (A-grade) - ensures monotonicity and <0.012% full-scale error after calibration |
| SINAD | 70dB at 10kHz - supports >11.5 effective bits for precision sensor signal digitization |
Pinout & Package
MAX1241AESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and rated for -40°C to +85°C operation. Pin layout matches industry-standard SO-8 footprint with 1.27mm pitch.
| 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 rails |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for <2µA shutdown; open or high for active mode - no internal reference activation (MAX1241 only) |
| REF (Pin 4) | External reference input | Accepts 1.0V–VDD reference; requires ≤10Ω source impedance during conversion; bypass ≥0.1µF |
| GND (Pin 5) | Analog/digital ground | Single-point star ground connection required - separates analog and digital return paths |
| SCLK (Pin 6) | Serial clock input | Drives DOUT data shift-out; supports up to 2.1MHz; min 200ns high/low pulse width |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; must remain low until all 13 bits (EOC + 12 data) are read |
| DOUT (Pin 8) | Serial data output | Three-state output; EOC flag (high) followed by MSB-first 12-bit data; transitions on SCLK falling edge |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI/QSPI/MICROWIRE protocols - uses only SCLK, CS, DOUT with no MISO/MOSI complexity |
| Internal track/hold | 1.5µs acquisition time - eliminates external hold capacitor and simplifies front-end design |
| Low-power shutdown | <2µA supply current - enables µA-level system sleep modes between measurements |
| Wide reference flexibility | Supports 1.0V–VDD external references - accommodates precision low-voltage sensors or rail-to-rail scaling |
| Robust digital timing | 2.1MHz max SCLK with unrestricted duty cycle (≥200ns phases) - eases timing margin for MCU firmware |
Applications
| Battery-Powered Sensor Node | Isolated Industrial Data Acquisition |
|---|---|
Use Scenario: Remote environmental monitoring using thermistors, RTDs, or bridge sensors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; synchronized via microcontroller's GPIO-driven CS/SCLK. Use Value: 73ksps throughput and <2µA shutdown enable multi-second sleep intervals, extending battery life to years in low-duty-cycle deployments. |
Use Scenario: High-noise factory floor measurement of motor currents, pressure transducers, or temperature in PLC I/O modules. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing through optocoupler or digital isolator; driven by isolated microcontroller clock domain. Use Value: 70dB SINAD and ±0.5 LSB INL ensure accurate digitization despite ground-loop noise, while SO-8 package fits tight isolation barrier layouts. |
| Portable Data Logger | Process Control Loop Interface |
Use Scenario: Handheld field instrument logging voltage, current, or pH with onboard flash storage and USB/Bluetooth upload. IC Role / Device Role / Timing Role: Core ADC feeding data to ARM Cortex-M MCU; configured for burst sampling triggered by timer or external event. Use Value: Single-supply +2.7V–+5.25V operation allows direct connection to 3.3V or 5V system rails without LDO overhead. |
Use Scenario: Analog input module in distributed control system (DCS) receiving 4–20mA or 0–10V process signals. IC Role / Device Role / Timing Role: Signal-chain ADC after precision I/V conversion and filtering; sampled at deterministic intervals for PID computation. Use Value: 1.5µs track/hold acquisition and 7.5µs conversion guarantee sub-10µs total latency - critical for fast loop response times. |
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, 1MSPS, SPI-only interface, no SHDN pin, 10-bit resolution | Higher speed but lower resolution; lacks shutdown control and MICROWIRE compatibility | Select when >100ksps sampling is required and 10-bit accuracy suffices |
| AD7476AARMZ | 2.35V–5.25V supply, 1MSPS, SPI interface, 12-bit, 350nA shutdown, no internal T/H | Requires external track/hold or low-Z source; superior shutdown current but higher interface complexity | Prefer for ultra-low-power wake-on-event systems where external T/H is acceptable |
Compared with MAX1241AESA, ADS7822U trades resolution and power control for speed, while AD7476AARMZ offers faster sampling and deeper shutdown but shifts acquisition burden to external circuitry - making MAX1241AESA optimal for balanced low-power, precision, and integration in compact sensor nodes.
Availability
MAX1241AESA is available at Aetrix Electronics and suitable for battery-powered systems, portable data logging, isolated data acquisition, and process control requiring stable component supply across industrial temperature ranges.
Supply support for MAX1241AESA 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 single-supply operation and minimal external components.
FAQ
What is the reference voltage requirement for MAX1241AESA?
The MAX1241AESA 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 performance, the reference source must provide ≤10Ω output impedance during conversion and be bypassed with ≥0.1µF capacitance near the REF pin. The MAX1241AESA datasheet specifies that VREF stability directly impacts gain error and INL performance.
Does MAX1241AESA support SPI mode 0,0 (CPOL=0, CPHA=0)?
Yes, MAX1241AESA fully supports SPI mode 0,0 (CPOL=0, CPHA=0), as well as QSPI and MICROWIRE protocols. In this configuration, CS falling edge initiates conversion, DOUT goes low during conversion, and data is clocked out MSB-first on SCLK falling edges after DOUT rises (EOC). The interface requires 13 clock cycles to read EOC + 12 data bits, matching standard SPI frame timing.
What is the minimum acquisition time for MAX1241AESA?
The guaranteed minimum acquisition time for MAX1241AESA is 1.5µs, defined as both the maximum time required to acquire the input signal and the minimum time needed before conversion initiation. This value assumes source impedance ≤1kΩ; higher impedances increase tACQ per tACQ = 9(RS + 9kΩ) × 16pF. External 0.01µF input capacitance mitigates effects of high-Z sources.
Can MAX1241AESA operate from a 5V supply?
Yes, MAX1241AESA is explicitly rated for operation from +2.7V to +5.25V supply voltage (VDD). At VDD = 5.25V, typical supply current is 2.8mA at 73ksps, and absolute maximum ratings allow transient excursions to +6V on VDD. The device maintains full AC and DC specifications across this range, including 70dB SINAD and ±0.5 LSB INL at 5V operation.
How does shutdown mode affect wake-up time in MAX1241AESA?
In MAX1241AESA, shutdown mode reduces supply current to <2µA, and wake-up time is fixed at 4µs - independent of shutdown duration - because it uses an external reference that remains active. This contrasts with the MAX1240 (internal reference), where wake-up depends on reference capacitor recharge. Thus, MAX1241AESA enables rapid, deterministic resumption of conversions after shutdown assertion.
MAX1241AESA 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:
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1241AESA FAQ
1.How can I place an order for MAX1241AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241AESA 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 MAX1241AESA reliable?
The price and inventory of MAX1241AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241AESA is usually 5 days.
3.What payment methods are accepted for MAX1241AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241AESA?
MAX1241AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241AESA 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 MAX1241AESA?
For technical support, including MAX1241AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241AESA requirements.
6.How does Aetrix verify that MAX1241AESA is sourced from the original manufacturer or authorized distributors?
All MAX1241AESA 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 MAX1241AESA meets industry standards.
7.What is the process for return or replacement of MAX1241AESA?
All MAX1241AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241AESA, 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 MAX1241AESA part is unused and in its original packaging.
Return procedure for MAX1241AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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