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Analog Devices Inc./Maxim Integrated MAX1282BEUE+T
- Part No.:
- MAX1282BEUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1282BEUE+T.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
MAX1282BEUE+T from Maxim Integrated is a 12-bit, 4-channel serial analog-to-digital converter (ADC) with internal +2.5V reference, 400ksps sampling rate, and single +4.5V to +5.5V supply operation. It integrates a track/hold circuit, software-configurable unipolar/bipolar and single-ended/pseudo-differential inputs, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It is used in portable data logging and battery-powered instrumentation requiring precision, low power, and compact TSSOP packaging.
For engineers reviewing the MAX1282BEUE+T datasheet, MAX1282BEUE+T pinout, MAX1282BEUE+T application, or MAX1282BEUE+T equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts - all grounded in the official MAX1282/MAX1283 datasheet Rev 0 (5/2000).
Technical Context
The MAX1282BEUE+T employs successive-approximation register (SAR) architecture with integrated track/hold and 4-channel analog multiplexer. Its conversion timing is fully synchronized to an external serial clock (fSCLK up to 6.4MHz), with acquisition time fixed at 400ns and conversion time of 2.5µs at 400ksps.
It supports four software-selectable power modes (normal, reduced-power, fast power-down, full power-down) and features a hardwired SHDN pin. The internal reference buffer provides ±1.5% adjustability via REFADJ, and external reference operation (1V to VDD) is supported by disabling the buffer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in measurement-critical systems. |
| Sampling Rate | 400ksps - enables accurate capture of signals up to 200kHz full-linear bandwidth (−3dB point) without aliasing in baseband applications. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error, critical for closed-loop control and calibration-sensitive instruments. |
| Supply Voltage | +4.5V to +5.5V - operates directly from standard 5V logic rails without LDO regulation, simplifying power design in embedded systems. |
| Power Consumption | 2.5mA at 400ksps - enables continuous high-speed acquisition in portable devices with limited battery capacity. |
| Reference | Internal +2.500V ±0.8% (±20mV) - eliminates need for external precision reference, reducing BOM count and layout area in space-constrained designs. |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended-temperature environments including medical and process control equipment. |
Pinout & Package
MAX1282BEUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Positive supply inputs | Must be tied together and decoupled locally; VDD2 powers internal reference buffer - noise on either rail directly impacts ADC accuracy. |
| GND | Analog/digital ground | Single-point connection required; separation from noisy digital grounds prevents offset drift and INL degradation. |
| CH0–CH3, COM | Analog input channels & common reference | Software-selectable 4 single-ended or 2 pseudo-differential pairs; COM sets zero-code voltage and must remain stable within ±0.5LSB. |
| REF, REFADJ | Reference output & adjustment terminal | REF delivers buffered +2.5V; REFADJ allows ±1.5% fine-tuning or disables buffer when pulled to VDD1 for external reference use. |
| SCLK, DIN, DOUT, CS, SSTRB | 4-wire serial interface | Fully compatible with SPI (CPOL=0, CPHA=0); SSTRB provides deterministic strobe for TMS320 DSP synchronization. |
| SHDN | Hardware shutdown control | Active-low input reduces supply current to 2µA (typ); enables rapid wake-up between conversions for ultra-low average power. |
Key Features
| Feature | Design Value |
|---|---|
| 4-channel analog multiplexer + track/hold | Eliminates need for external MUX and TH circuits - reduces component count, board area, and signal path mismatch in multi-sensor systems. |
| Software-configurable input mode | Runtime selection of unipolar/bipolar and single-ended/pseudo-differential operation via control byte - enables flexible sensor interfacing without hardware changes. |
| Four power management modes | Full power-down (2µA) and automatic wake-on-CS allow dynamic power scaling - extends battery life in intermittent-sampling applications like data loggers. |
| SPI/QSPI/MICROWIRE/TMS320 compatibility | Direct connection to microcontrollers and DSPs without level shifters or glue logic - accelerates firmware integration and reduces debug cycles. |
| Internal +2.5V reference with ±1.5% adjustability | Provides stable, factory-trimmed reference with optional fine-tuning - avoids cost and tolerance stack-up of external references in portable instruments. |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over 72-hour intervals. IC Role / Device Role / Timing Role: Primary ADC acquiring 4 analog sensor outputs sequentially at 100Hz with auto-shutdown between samples. Use Value: 2.5mA active current and 2µA full-power-down enable >1-year battery life on two AA cells while maintaining 12-bit resolution across −40°C to +85°C. |
Use Scenario: Handheld ECG monitor digitizing lead I, II, III, and aVR signals with baseline correction and noise filtering. IC Role / Device Role / Timing Role: Simultaneous-sampling-capable ADC configured in pseudo-differential mode to reject common-mode interference from AC mains. Use Value: ±1 LSB INL and 70dB SINAD ensure diagnostic-grade waveform fidelity; internal reference eliminates drift-induced baseline wander. |
| Battery-Powered Instruments | Process Control Sensors |
|
Use Scenario: Field-deployable pH/ORP meter using electrochemical sensors with low-output impedance and mV-level signals. IC Role / Device Role / Timing Role: High-impedance-tolerant ADC with 800Ω input RIN and 400ns acquisition time, operating from 5V battery with no external op-amp buffering. Use Value: Single-supply +4.5V to +5.5V operation and internal 2.5V reference simplify analog front-end design - reduces PCB layers and calibration effort. |
Use Scenario: Industrial temperature transmitter converting RTD or thermocouple outputs to 4–20mA loop with HART digital overlay. IC Role / Device Role / Timing Role: Precision ADC providing 12-bit digitization of conditioned analog inputs under harsh EMI conditions and wide ambient temperature swings. Use Value: −40°C to +85°C rating, ±15ppm/°C gain-error TC, and 76dB channel-to-channel crosstalk ensure stable readings across plant-floor thermal gradients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 8-pin SOIC, 200ksps, no internal reference, requires external 2.5V ref; 1.5mW typical power at 200ksps. | Lacks integrated reference and multiplexer - needs external components for same functionality; better suited for space-constrained, lower-speed designs where reference is already available. | Select when board area is critical and system already includes a precision 2.5V reference; avoid if minimizing BOM count or supporting bipolar inputs is required. |
| MAX11131ETE+ | 16-pin TQFN, 500ksps, internal 4.096V ref, SPI-only interface, −40°C to +125°C rating, 2.2mA at 500ksps. | Higher speed and wider temp range, but incompatible pinout and different reference voltage - requires PCB redesign and firmware adaptation. | Choose for higher sampling rate or extended temperature operation; not drop-in - re-layout and driver updates needed. |
Compared with ADS7816U and MAX11131ETE+, the MAX1282BEUE+T uniquely balances integrated reference, 4-channel MUX, SPI/QSPI compatibility, and industrial temperature range in a mature, pin-compatible TSSOP package - making it optimal for cost-sensitive, field-deployable instrumentation where design reuse and supply-chain stability matter.
Availability
MAX1282BEUE+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1282BEUE+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 MAX1282/MAX1283 family was designed for portable and battery-operated measurement systems needing precision, low power, and minimal external components - delivering integrated signal chain functionality in compact TSSOP packages.
FAQ
What is the maximum sampling rate of the MAX1282BEUE+T?
The MAX1282BEUE+T achieves a maximum sampling rate of 400ksps when operated with a 6.4MHz serial clock and +4.5V to +5.5V supply. This rate is specified under full-linearity conditions (±1 LSB INL) and requires proper decoupling, stable reference, and adherence to acquisition timing (tACQ = 400ns). At lower clock frequencies, the effective sampling rate scales linearly.
Does the MAX1282BEUE+T require an external reference voltage?
No, the MAX1282BEUE+T includes an internal +2.500V ±0.8% reference with adjustable range (±1.5%) via the REFADJ pin. An external reference (1V to VDD) may be used only after disabling the internal buffer by pulling REFADJ to VDD1 - doing so forfeits the internal reference's temperature stability and initial accuracy guarantees.
How does the power-down functionality work on the MAX1282BEUE+T?
The MAX1282BEUE+T offers four power modes: normal (2.5mA), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA). Full power-down is activated by pulling SHDN low or setting PD1=PD0=0 in software. Any serial activity (CS low) automatically wakes the device - enabling rapid, low-overhead sampling bursts in energy-constrained systems.
Can the MAX1282BEUE+T interface directly with a TMS320 DSP?
Yes, the MAX1282BEUE+T supports direct connection to TMS320-family DSPs via its SSTRB (serial strobe) output, which pulses high for one SCLK period before the MSB decision. This provides precise timing alignment for DSP-controlled sampling windows - eliminating need for external synchronization logic or additional GPIO resources.
What are the analog input voltage limits for the MAX1282BEUE+T?
With internal reference enabled, the MAX1282BEUE+T analog inputs (CH0–CH3, COM) accept voltages from GND to VDD1 in unipolar mode, or ±VREF/2 (±1.25V) around COM in bipolar mode. Absolute ratings allow −0.3V to VDD1+0.3V, but for full-scale accuracy, inputs must stay within GND −50mV to VDD1 +50mV to avoid clipping or diode conduction.
MAX1282BEUE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 2, 4
- Input Type:
- Pseudo-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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1282BEUE+T FAQ
1.How can I place an order for MAX1282BEUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1282BEUE+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 MAX1282BEUE+T reliable?
The price and inventory of MAX1282BEUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1282BEUE+T is usually 5 days.
3.What payment methods are accepted for MAX1282BEUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1282BEUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1282BEUE+T?
MAX1282BEUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1282BEUE+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 MAX1282BEUE+T?
For technical support, including MAX1282BEUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1282BEUE+T requirements.
6.How does Aetrix verify that MAX1282BEUE+T is sourced from the original manufacturer or authorized distributors?
All MAX1282BEUE+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 MAX1282BEUE+T meets industry standards.
7.What is the process for return or replacement of MAX1282BEUE+T?
All MAX1282BEUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1282BEUE+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 MAX1282BEUE+T part is unused and in its original packaging.
Return procedure for MAX1282BEUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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