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Analog Devices Inc./Maxim Integrated MAX1241AESA+T
- Part No.:
- MAX1241AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241AESA+T.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,266
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Product details
Overview
MAX1241AESA+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, accepts 0V to VREF analog inputs, and requires an external reference voltage. It is widely used in portable data logging and isolated industrial sensor interfaces where space, power, and precision are constrained.
For engineers reviewing the MAX1241AESA+T datasheet, MAX1241AESA+T pinout, MAX1241AESA+T application, or MAX1241AESA+T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for production deployment.
Technical Context
The MAX1241AESA+T implements a track/hold circuit with 1.5µs acquisition time and a 12-bit SAR core clocked by an internal oscillator. Its serial interface uses unipolar MSB-first output format with end-of-conversion (EOC) signaled by DOUT high transition, requiring ≥13 SCLK falling edges to read full 12-bit result plus leading EOC bit.
It supports external reference voltages from +1.0V to VDD (≤+5.25V), with REF input impedance ≥18kΩ DC and ≤10Ω output impedance requirement for stable operation. Shutdown mode reduces supply current to ≤2µA, with wake-up delay of 4µs when exiting shutdown - independent of reference capacitor discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step; enables ±0.5 LSB INL and no missing codes over temperature. |
| Throughput Rate | 73ksps - maximum sampling rate at fSCLK = 2.1MHz; defines real-time signal capture capability for <2.25MHz small-signal bandwidth inputs. |
| Supply Voltage Range | +2.7V to +5.25V - supports direct connection to Li-ion battery rails or 3.3V/5V system supplies without LDO regulation. |
| Power Consumption | 3mW at 73ksps (VDD = 3.6V) - enables >100-hour battery life in 1ksps portable logging; drops to ≤2µA in shutdown. |
| Reference Input | External only - REF pin accepts 1.0V–VDD reference; bypass requires ≥0.1µF ceramic capacitor; supports precision external references like MAX6126. |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% full-scale linearity error; critical for closed-loop control feedback accuracy. |
| Aperture Jitter | <50ps - limits SNR degradation in undersampling applications; enables clean digitization of kHz–MHz band-limited signals. |
Pinout & Package
MAX1241AESA+T is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 4.0mm, 1.27mm pitch). All pins are surface-mount compatible and RoHS-compliant (+ suffix).
| 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 to GND for noise immunity. |
| AIN (Pin 2) | Analog input | Single-ended input range 0V to VREF; input protection clamps to GND −0.3V / VDD +0.3V; source impedance ≤1kΩ recommended. |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for ≤2µA shutdown; leave open or pull high for normal operation; does not enable internal reference (MAX1240 only). |
| REF (Pin 4) | Reference voltage input | External reference input (1.0V–VDD); must drive ≤10Ω output impedance and supply up to 250µA during conversion. |
| GND (Pin 5) | Analog/digital common ground | Single-point star ground required; separates analog and digital return paths to minimize noise coupling into ADC core. |
| SCLK (Pin 6) | Serial clock input | Accepts 0–2.1MHz clock; duty cycle unrestricted if each phase ≥200ns; must remain low during conversion. |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; high state places DOUT in high-impedance; minimum pulse width 240ns. |
| DOUT (Pin 8) | Serial data output | MSB-first unipolar output; EOC signaled by rising edge; transitions on SCLK falling edge; high-Z when CS = high. |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI/QSPI/MICROWIRE protocols (CPOL=0, CPHA=0); eliminates need for parallel bus or additional level shifters. |
| Internal track/hold | 1.5µs acquisition time with no external hold capacitor required; simplifies layout and reduces BOM count in space-constrained designs. |
| Low-power shutdown | ≤2µA shutdown current with 4µs wake-up time; enables microcontroller-gated sampling for ultra-low average power in duty-cycled systems. |
| Wide supply range | +2.7V to +5.25V operation allows direct integration with mixed-voltage systems (e.g., 3.3V MCU + 5V sensor front-end). |
| High AC performance | 70dB SINAD and 80dB SFDR at 10kHz input; supports precision measurement in instrumentation-grade signal chains. |
Applications
| Battery-Powered Data Loggers | Isolated Industrial Sensor Interfaces |
|---|---|
Use Scenario: Continuous 1ksps temperature/humidity logging in handheld environmental monitors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; provides precise 12-bit resolution while consuming only 66µW at 1ksps. Use Value: Enables >6-month battery life without compromising measurement fidelity; 8-pin SO footprint minimizes PCB area in compact enclosures. |
Use Scenario: Analog signal acquisition in DIN-rail mounted PLC I/O modules with galvanic isolation between field sensors and controller bus. IC Role / Device Role / Timing Role: Isolated-side ADC converting 4–20mA or 0–10V process signals; synchronized via opto-isolated SCLK/CS lines. Use Value: Maintains ±0.5 LSB INL across -40°C to +85°C; external reference support allows traceable calibration using industrial-grade voltage references. |
| Portable Medical Instrumentation | Process Control Loop Monitoring |
Use Scenario: ECG front-end signal conditioning in wearable cardiac monitors requiring low noise, low power, and small form factor. IC Role / Device Role / Timing Role: High-fidelity ADC capturing filtered biopotential waveforms; leverages 2.25MHz small-signal bandwidth for transient detection. Use Value: Aperture jitter <50ps preserves signal integrity; 73ksps throughput supports Nyquist sampling of QRS complexes up to 36.5kHz. |
Use Scenario: Real-time monitoring of pressure, flow, and level transmitters in chemical plant DCS systems with strict EMC and reliability requirements. IC Role / Device Role / Timing Role: Local ADC in smart transmitter electronics; interfaces to HART modem or RS-485 controller via 3-wire SPI. Use Value: Robust 8-pin SO package qualified for industrial temperature range (-40°C to +85°C); REF input tolerates noisy plant supply rails when paired with local LDO. |
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 to +5.25V, SPI-only interface; no SHDN pin; internal reference optional but not disabled via pin. | Higher speed but lacks hardware shutdown control; requires external reference for best accuracy at full speed. | Select when higher throughput is needed and shutdown is managed in firmware; verify REF stability under dynamic load. |
| AD7476AARMZ | 12-bit, 1MSPS, +2.35V to +5.25V, SPI-compatible; built-in reference (2.5V); no external REF option; 6-pin SOT-23 package. | Smaller footprint and integrated reference simplify design, but eliminates flexibility for precision external references or ratiometric sensing. | Select for space-constrained, cost-sensitive designs where 2.5V internal reference suffices and 1MSPS headroom is beneficial. |
Compared with ADS7822U and AD7476AARMZ, MAX1241AESA+T uniquely balances low power (3mW @ 73ksps), hardware-controlled shutdown (≤2µA), external reference flexibility, and industrial temperature rating - making it optimal for battery-powered and isolated industrial data acquisition where configurability and reliability are prioritized over raw speed.
Availability
MAX1241AESA+T is available at Aetrix Electronics and suitable for battery-powered systems, portable data logging, and isolated data-acquisition applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX1241AESA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1240/MAX1241 product line was designed for ultra-low-power, space-constrained data acquisition systems requiring 12-bit precision, serial interfacing, and wide supply voltage tolerance - targeting portable instrumentation and remote sensor nodes.
FAQ
What is the reference voltage requirement for MAX1241AESA+T?
The MAX1241AESA+T 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 accuracy, the external reference must provide ≤10Ω output impedance and sustain up to 250µA load current during conversion. A minimum 0.1µF ceramic bypass capacitor is mandatory at the REF pin.
Does MAX1241AESA+T support SPI, QSPI, and MICROWIRE protocols?
Yes, MAX1241AESA+T supports all three protocols with CPOL = 0 and CPHA = 0 configuration. Its 3-wire interface (SCLK, CS, DOUT) is electrically and timing-compatible with standard SPI/QSPI/MICROWIRE controllers. Data is MSB-first unipolar format with end-of-conversion signaled by DOUT rising edge, and requires ≥13 SCLK falling edges to read the full result.
What is the shutdown current and wake-up time for MAX1241AESA+T?
MAX1241AESA+T draws ≤2µA in shutdown mode when SHDN is pulled low. Its wake-up time is 4µs - the interval from SHDN deassertion to when a new conversion may be initiated. This fast recovery is enabled because the device relies on an external reference, eliminating dependency on internal reference capacitor recharge time.
Can MAX1241AESA+T operate from a 5V supply?
Yes, MAX1241AESA+T is fully specified for operation from +2.7V to +5.25V. At VDD = 5.25V, its typical supply current is 2.8mA at 73ksps, and it maintains full 12-bit performance including ±0.5 LSB INL and 70dB SINAD. The analog input range remains 0V to VREF, independent of VDD.
What package type and footprint does MAX1241AESA+T use?
MAX1241AESA+T uses an 8-pin SO (Small Outline) package conforming to JEDEC MS-012AC standard: 5.0mm × 4.0mm body size, 1.27mm lead pitch, and gull-wing leads. It is RoHS-compliant (indicated by the '+' suffix) and compatible with standard reflow soldering profiles including peak temperature up to +260°C.
MAX1241AESA+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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1241AESA+T FAQ
1.How can I place an order for MAX1241AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241AESA+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 MAX1241AESA+T reliable?
The price and inventory of MAX1241AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241AESA+T is usually 5 days.
3.What payment methods are accepted for MAX1241AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241AESA+T?
MAX1241AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241AESA+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 MAX1241AESA+T?
For technical support, including MAX1241AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241AESA+T requirements.
6.How does Aetrix verify that MAX1241AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX1241AESA+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 MAX1241AESA+T meets industry standards.
7.What is the process for return or replacement of MAX1241AESA+T?
All MAX1241AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241AESA+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 MAX1241AESA+T part is unused and in its original packaging.
Return procedure for MAX1241AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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