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Analog Devices Inc./Maxim Integrated MAX1241BCSA+
- Part No.:
- MAX1241BCSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1241BCSA+.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:384
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Product details
Overview
The MAX1241BCSA+ 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 with 1.5µs acquisition, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. Designed for battery-powered sensor nodes and isolated data-acquisition systems, it accepts analog inputs from 0V to VREF with external reference support.
For engineers reviewing the MAX1241BCSA+ datasheet, MAX1241BCSA+ pinout, MAX1241BCSA+ application, or MAX1241BCSA+ equivalent, this page delivers verified electrical parameters, package mapping, functional pin roles, real-world use cases, and two validated alternative parts - all confirmed against Maxim's official 19-1155 Rev 5 datasheet and ordering information.
Technical Context
The MAX1241BCSA+ implements a capacitive SAR architecture with integrated track/hold, eliminating need for external hold capacitors. Its conversion sequence is initiated by CS falling edge, with end-of-conversion signaled by DOUT high transition, followed by MSB-first serial output synchronized to SCLK falling edges.
It operates in two modes: normal (IDD = 1.6–3.8mA at VDD = 3.6V) and shutdown (ISHDN ≤ 2µA), where SHDN pin controls both power state and internal reference enable/disable logic. Unlike the MAX1240, the MAX1241BCSA+ requires an external reference voltage applied to REF, supporting input ranges up to VDD and tolerating reference source impedances ≤10Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit unipolar output with no missing codes over temperature |
| Throughput Rate | 73ksps maximum sampling speed - supports real-time monitoring of fast transients |
| Conversion Time | 7.5µs - enables tight timing control in synchronous data acquisition loops |
| INL (Integral Nonlinearity) | ±1 LSB - ensures <0.025% full-scale error for precision measurement applications |
| Supply Voltage Range | +2.7V to +5.25V - compatible with Li-ion, 3.3V, and 5V system rails without level-shifting |
| Reference Input | External only (0V to VDD range) - allows flexible scaling and ratiometric sensing configurations |
| Power Consumption | 3mW at 73ksps (VDD = 3.6V) - enables multi-year operation on coin-cell batteries |
Pinout & Package
MAX1241BCSA+ is housed in an 8-pin SO (Small Outline) package with gull-wing leads, RoHS-compliant and lead(Pb)-free per + suffix designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +5.25V; powers analog and digital sections |
| AIN (Pin 2) | Analog input | 0V to VREF sampling node; protected to GND −0.3V / VDD +0.3V |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for <2µA shutdown; open or high for active mode (no internal reference) |
| REF (Pin 4) | External reference input | Accepts 1.0V to VDD; requires ≤10Ω source impedance and ≥0.1µF bypass |
| GND (Pin 5) | Analog/digital common ground | Single-point star-ground connection required for optimal noise performance |
| SCLK (Pin 6) | Serial clock input | Drives data readout up to 2.1MHz; min pulse width 200ns per phase |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; high state places DOUT in high-impedance |
| DOUT (Pin 8) | Serial data output | MSB-first, unipolar format; transitions on SCLK falling edge; EOC = rising edge |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI, QSPI, and MICROWIRE protocols - connects directly to standard µP I/O without glue logic |
| Internal track/hold | 1.5µs acquisition time eliminates external hold capacitor and reduces board area and BOM count |
| Low-power shutdown | 2µA max supply current in shutdown - extends battery life in intermittent-sampling applications |
| Wide supply range | +2.7V to +5.25V operation - supports direct integration into mixed-voltage industrial and portable systems |
| Reference flexibility | External reference input accepts up to VDD - enables ratiometric measurements and custom full-scale scaling |
Applications
| Battery-Powered Sensor Node | Isolated Data Acquisition |
|---|---|
Use Scenario: Remote environmental monitoring using solar-charged Li-ion battery and isolated RS-485 backhaul. IC Role / Device Role / Timing Role: Primary ADC digitizing thermistor, humidity, and pressure sensor outputs at 10ksps with precise timing alignment via CS-triggered conversions. Use Value: 3mW active power and 2µA shutdown current enable >5-year field deployment without maintenance. |
Use Scenario: High-voltage motor drive feedback loop with galvanic isolation between power stage and controller. IC Role / Device Role / Timing Role: Isolated-side ADC capturing current shunt voltage with 7.5µs conversion latency and deterministic CS-initiated timing. Use Value: External reference support allows ratiometric scaling to match isolated DC-DC bias, eliminating gain drift across temperature. |
| Portable Data Logger | Process Control Transmitter |
Use Scenario: Handheld asset condition monitor logging vibration, temperature, and acoustic emission waveforms. IC Role / Device Role / Timing Role: Low-noise 12-bit ADC interfacing to anti-alias filtered analog front-end; SPI-read data buffered in µP RAM before SD write. Use Value: 8-pin SO package and 3-wire interface minimize PCB footprint and routing complexity in space-constrained enclosures. |
Use Scenario: 4–20mA HART-enabled field transmitter measuring tank level via differential pressure cell. IC Role / Device Role / Timing Role: Precision ADC converting mV-level bridge output with external 2.5V reference for stable zero/span calibration. Use Value: ±1 LSB INL and 70dB SINAD ensure 0.025% measurement accuracy required for SIL-2 process safety compliance. |
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, 200ksps, internal reference only | Requires internal reference; lacks SHDN-controlled power gating; higher quiescent current (1.2mA) | Select when higher throughput is needed and external reference is not required |
| AD7476ARMZ | 2.35V–5.25V supply, 12-bit, SPI interface, 1MSPS, no internal reference, 350nA shutdown | Faster conversion (1µs), smaller 8-lead MSOP package, but higher dynamic power (1.5mW @ 1MSPS) | Select when sub-microsecond latency and ultra-low shutdown current are critical |
Compared with ADS7822U and AD7476ARMZ, the MAX1241BCSA+ offers superior trade-off between low 73ksps throughput, guaranteed ±1 LSB INL, and robust 2µA shutdown - making it optimal for long-life, precision, battery-operated measurement nodes where timing determinism and reference flexibility outweigh raw speed.
Availability
MAX1241BCSA+ 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 extended temperature and lifecycle requirements.
Supply support for MAX1241BCSA+ 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 serial ADCs optimized for remote sensing, portable instrumentation, and space-constrained embedded systems demanding high accuracy and minimal supply current.
FAQ
What is the reference voltage configuration for MAX1241BCSA+?
The MAX1241BCSA+ requires an external reference voltage applied to the REF pin, supporting input ranges from 1.0V to VDD. It does not include an internal reference - unlike the MAX1240 family. The external reference must provide ≤10Ω output impedance and be bypassed with ≥0.1µF capacitance close to the REF pin. This configuration enables ratiometric measurements and flexible full-scale scaling in the MAX1241BCSA+ design.
What is the maximum sampling rate and conversion time of MAX1241BCSA+?
The MAX1241BCSA+ achieves a maximum throughput rate of 73ksps with a fixed conversion time of 7.5µs, as specified under fSCLK = 2.1MHz and VDD = +2.7V to +5.25V. This timing includes internal track/hold acquisition (1.5µs) and SAR conversion. The device maintains ±1 LSB INL and 70dB SINAD performance at this rate, making MAX1241BCSA+ suitable for medium-speed precision acquisition tasks.
How does the SHDN pin function on MAX1241BCSA+?
On the MAX1241BCSA+, the SHDN pin operates as a three-level control: pulled low for shutdown (<2µA supply current), left open for normal operation with external reference enabled, or pulled high - which has identical functional effect as open. Unlike the MAX1240, SHDN high does not activate an internal reference on MAX1241BCSA+, since it lacks one. Wake-up time after shutdown is 4µs, enabling rapid duty-cycled operation.
Which serial interface standards does MAX1241BCSA+ support?
The MAX1241BCSA+ supports SPI, QSPI, and MICROWIRE protocols via its 3-wire interface (SCLK, CS, DOUT). It uses CPOL = 0 and CPHA = 0 timing, outputs MSB-first with a leading high bit signaling end-of-conversion, and tolerates SCLK frequencies up to 2.1MHz. No external level shifters or protocol translators are needed - MAX1241BCSA+ connects directly to standard microcontroller I/O ports.
What package type and RoHS status does MAX1241BCSA+ have?
The MAX1241BCSA+ is supplied in an 8-pin SO (Small Outline) package with gull-wing leads, measuring 4.9mm × 6.0mm × 1.75mm. The "+" suffix confirms it is lead(Pb)-free and RoHS-compliant per Maxim's 19-1155 Rev 5 datasheet. This package supports standard reflow soldering profiles up to +260°C and is rated for 0°C to +70°C ambient operation.
MAX1241BCSA+ 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:
- -
MAX1241BCSA+ FAQ
1.How can I place an order for MAX1241BCSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241BCSA+ 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 MAX1241BCSA+ reliable?
The price and inventory of MAX1241BCSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241BCSA+ is usually 5 days.
3.What payment methods are accepted for MAX1241BCSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241BCSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241BCSA+?
MAX1241BCSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241BCSA+ 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 MAX1241BCSA+?
For technical support, including MAX1241BCSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241BCSA+ requirements.
6.How does Aetrix verify that MAX1241BCSA+ is sourced from the original manufacturer or authorized distributors?
All MAX1241BCSA+ 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 MAX1241BCSA+ meets industry standards.
7.What is the process for return or replacement of MAX1241BCSA+?
All MAX1241BCSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241BCSA+, 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 MAX1241BCSA+ part is unused and in its original packaging.
Return procedure for MAX1241BCSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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