My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1226BEEE+
- Part No.:
- MAX1226BEEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1226BEEE+.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,824
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1226BEEE+ from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over -40°C to +85°C), on-chip 16-entry FIFO, and internal 4.096V reference. It supports 8 single-ended or 4 true differential analog inputs in unipolar/bipolar modes and operates from a single +5V supply. It is used in industrial control systems for real-time sensor data acquisition under extended temperature conditions.
For engineers reviewing the MAX1226BEEE+ datasheet, MAX1226BEEE+ pinout, MAX1226BEEE+ application, or MAX1226BEEE+ equivalent, this page delivers verified technical context, exact pin functions, confirmed operating parameters, and validated alternative options - all specific to the -40°C to +85°C grade QSOP variant.
Technical Context
The MAX1226BEEE+ implements a fully differential successive-approximation register (SAR) ADC architecture with integrated track-and-hold, supporting both single-ended and true differential input configurations. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10, while external SCLK up to 10MHz drives SPI/QSPI/MICROWIRE-compatible serial communication.
It features an active-low EOC signal synchronized to conversion completion, configurable scan mode for multi-channel acquisition, and internal averaging across up to 16 samples per result. Temperature measurement uses the same internal reference and is reported in two's complement format at 1/8°C resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with no missing codes over temperature. |
| Sampling Rate | 300ksps maximum - supports high-speed transient capture when externally clocked (CKSEL=11). |
| INL / DNL | ±1 LSB - ensures monotonicity and linearity critical for closed-loop control feedback paths. |
| Internal Reference | 4.096V ±72mV (±20ppm/°C TC) - provides stable scaling without external reference components. |
| Temperature Sensor | ±1.2°C accuracy over -40°C to +85°C - enables system-level thermal monitoring without added sensors. |
| Supply Current | 2.3mA at 300ksps - enables low-power operation in battery-backed or energy-constrained instrumentation. |
| SPI Interface | 10MHz 3-wire (CS/DIN/DOUT/SCLK) - compatible with standard microcontroller peripherals without protocol translation. |
Pinout & Package
MAX1226BEEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 1.0mm height) with gull-wing leads and RoHS-compliant finish. Pin 1 is marked by a beveled corner; device orientation follows JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN0 | Analog input channel 0 - configurable as single-ended or positive leg of differential pair AIN0/AIN1. |
| 2 | AIN1 | Analog input channel 1 - negative leg of differential pair AIN0/AIN1; not available as standalone single-ended input in differential mode. |
| 3 | AIN2 | Analog input channel 2 - positive leg of differential pair AIN2/AIN3. |
| 4 | AIN3 | Analog input channel 3 - negative leg of differential pair AIN2/AIN3. |
| 5 | AIN4 | Analog input channel 4 - positive leg of differential pair AIN4/AIN5. |
| 6 | AIN5 | Analog input channel 5 - negative leg of differential pair AIN4/AIN5. |
| 7 | REF-/AIN6 | Negative reference input or analog input 6 - dual-function pin; REF- mode disables AIN6 functionality. |
| 8 | CNVST/AIN7 | Active-low conversion start or analog input 7 - pulse low to trigger conversion in clock modes 00/01; functionally exclusive with AIN7 use. |
| 9 | REF+ | Positive reference input - requires 0.1µF bypass capacitor to GND for noise immunity and reference stability. |
| 10 | GND | Analog/digital ground - common return for VDD, REF+, and analog inputs; must connect to low-impedance ground plane. |
| 11 | VDD | +5V power supply - requires 0.1µF ceramic bypass capacitor close to pin; supports 4.75V–5.25V operating range. |
| 12 | SCLK | Serial clock input - clocks data in/out on rising/falling edges; duty cycle 40–60%; max 10MHz frequency. |
| 13 | CS | Active-low chip select - enables serial interface when low; places DOUT in high-impedance state when high. |
| 14 | DIN | Serial data input - latched on rising edge of SCLK; accepts 8-bit setup byte followed by optional register writes. |
| 15 | DOUT | Serial data output - outputs 16-bit result (MSB first, 4 leading zeros) on falling edge of SCLK; tri-stated when CS high. |
| 16 | EOC | End-of-conversion output - active-low pulse indicates valid data ready in FIFO; synchronous with conversion completion. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 16-entry FIFO | Enables burst-mode acquisition of up to 16 channel conversions + 1 temperature reading without CPU intervention. |
| True differential analog input T/H | Rejects common-mode noise and DC offsets in sensor interfaces such as strain gauges or RTD bridges. |
| Configurable unipolar/bipolar mode | Supports both 0–VREF (unipolar) and ±VREF/2 (bipolar) full-scale ranges via software register control. |
| AutoShutdown™ | Reduces supply current to ≤5µA during idle periods - extends battery life in portable data loggers. |
| Internal temperature sensor | Delivers calibrated die temperature readings at 1/8°C resolution, eliminating need for external thermal ICs. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
|
Use Scenario: Continuous logging of pressure, flow, and temperature signals from field transmitters in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC for multiplexed analog sensor front-end; performs autonomous scan sequences triggered by internal clock. Use Value: On-chip FIFO and scan mode reduce microcontroller polling overhead; internal reference eliminates calibration drift in harsh environments. |
Use Scenario: Portable ECG and SpO₂ monitor acquiring biopotential signals with simultaneous thermal compensation. IC Role / Device Role / Timing Role: Dual-role signal digitizer - converts analog biosignals and measures ambient/skin temperature for algorithmic correction. Use Value: True differential inputs reject 50/60Hz mains interference; ±1.2°C temp sensor accuracy enables reliable body temperature estimation. |
| Automated Test Equipment (ATE) | Energy Metering Subsystem |
|
Use Scenario: Modular DAQ card capturing voltage/current waveforms from DUTs during functional testing. IC Role / Device Role / Timing Role: High-fidelity digitizer with 73dB SINAD and 89dB SFDR - preserves signal integrity for FFT-based analysis. Use Value: 300ksps sampling rate supports undersampling of kHz-range harmonics; SPI interface simplifies FPGA host integration. |
Use Scenario: Secondary sensing path in smart meters measuring auxiliary voltages, neutral current, and thermal derating margins. IC Role / Device Role / Timing Role: Auxiliary ADC for non-revenue-critical but safety-relevant parameters - operates independently of main metrology chain. Use Value: Single +5V supply and internal reference reduce BOM count; -40°C to +85°C rating ensures reliability in outdoor meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, no internal reference or temperature sensor, 200ksps max, SO-8 package | Limited to lower-accuracy industrial monitoring where thermal compensation is handled externally | Select when cost sensitivity outweighs resolution and feature requirements; verify external reference stability and thermal management. |
| MAX11206ETE+ | 24-bit delta-sigma ADC, 1ksps, internal oscillator only, 16-pin TQFN, no FIFO or temperature sensor | Targeted at precision DC measurements (e.g., weigh scales), not high-speed or thermal-aware applications | Choose for ultra-high-resolution static measurements; avoid where 300ksps throughput or on-die temperature data is required. |
Compared with ADS7822U and MAX11206ETE+, the MAX1226BEEE+ uniquely combines 12-bit speed (300ksps), integrated temperature sensing, FIFO buffering, and internal reference in a single 16-pin QSOP - making it optimal for thermally aware, medium-speed data acquisition where board space and component count are constrained.
Availability
MAX1226BEEE+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, automated test equipment, and energy metering subsystems requiring stable component supply across extended temperature ranges.
Supply support for MAX1226BEEE+ 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 MAX1226BEEE+ belongs to Maxim's high-performance data acquisition product line, engineered specifically for thermally aware, multichannel sensor interfacing in space-constrained and extended-temperature environments.
FAQ
What is the operating temperature range of the MAX1226BEEE+?
The MAX1226BEEE+ is specified for continuous operation from -40°C to +85°C. This extended temperature grade is confirmed in the Ordering Information table and supported by electrical characteristics tested across that full range, including INL, DNL, reference voltage drift, and temperature sensor accuracy.
Does the MAX1226BEEE+ require an external reference voltage?
No, the MAX1226BEEE+ includes an internal 4.096V reference with ±20ppm/°C temperature coefficient. An external differential reference can be used via REF+ and REF- pins, but it is optional - the internal reference is sufficient for most applications and is mandatory for temperature measurements.
How many analog input channels does the MAX1226BEEE+ support?
The MAX1226BEEE+ supports 8 single-ended analog input channels (AIN0–AIN7) or 4 true differential pairs (AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7). Channel count is fixed per device variant - the MAX1226 family does not support more than 8 single-ended inputs.
What communication interface does the MAX1226BEEE+ use?
The MAX1226BEEE+ uses a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface with dedicated CS, DIN, DOUT, and SCLK pins. It operates at up to 10MHz SCLK, supports CPOL/CPHA = 00 or 11, and outputs 16-bit results with 4 leading zeros (MSB first).
Is the internal temperature sensor on the MAX1226BEEE+ factory-calibrated?
Yes, the internal temperature sensor on the MAX1226BEEE+ is factory-trimmed and specified for ±1.2°C accuracy over the full -40°C to +85°C operating range. Output resolution is 1/8°C in two's complement format, and measurements always use the internal reference regardless of external reference configuration.
MAX1226BEEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1226BEEE+ FAQ
1.How can I place an order for MAX1226BEEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1226BEEE+ 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 MAX1226BEEE+ reliable?
The price and inventory of MAX1226BEEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1226BEEE+ is usually 5 days.
3.What payment methods are accepted for MAX1226BEEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1226BEEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1226BEEE+?
MAX1226BEEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1226BEEE+ 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 MAX1226BEEE+?
For technical support, including MAX1226BEEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1226BEEE+ requirements.
6.How does Aetrix verify that MAX1226BEEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1226BEEE+ 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 MAX1226BEEE+ meets industry standards.
7.What is the process for return or replacement of MAX1226BEEE+?
All MAX1226BEEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1226BEEE+, 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 MAX1226BEEE+ part is unused and in its original packaging.
Return procedure for MAX1226BEEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1226BEEE+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
