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Analog Devices Inc./Maxim Integrated MAX1282BCUE+
- Part No.:
- MAX1282BCUE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1282BCUE+.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,049
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Product details
Overview
MAX1282BCUE+ 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 - used in portable data loggers and battery-powered medical instruments.
For engineers reviewing the MAX1282BCUE+ datasheet, MAX1282BCUE+ pinout, MAX1282BCUE+ application, or MAX1282BCUE+ equivalent, key selection criteria include its 400ksps throughput under 2.5mA supply current, ±1 LSB INL over 0°C to +70°C, TSSOP-16 package compatibility, and internal reference adjustability via REFADJ pin.
Technical Context
The MAX1282BCUE+ employs successive-approximation register (SAR) architecture with integrated track/hold and 4-channel analog multiplexer. Its conversion timing is fully clocked by an external SCLK (up to 6.4MHz), with acquisition time of 400ns and aperture jitter <50ps - enabling accurate digitization of signals up to 200kHz full-linear bandwidth.
It supports four power modes (normal, REDP, FASTPD, FULLPD), with hardwired SHDN pin and automatic wake-on-CS activation. The internal reference buffer provides ±1.5% adjustment range around 2.500V (±15ppm/°C TC), and accepts external references from 1V to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 0.0244% of full-scale range for precision measurement systems. |
| Sampling Rate | 400ksps - supports real-time capture of signals up to 200kHz Nyquist bandwidth without aliasing. |
| INL | ±1 LSB max - ensures monotonicity and ≤0.024% end-point linearity error across temperature (0°C to +70°C). |
| Supply Current | 2.5mA at 400ksps - enables low-power operation in battery-powered instrumentation with minimal thermal load. |
| Reference | Internal +2.500V ±1.5% adjustable - eliminates need for external reference IC while supporting calibration via REFADJ pin. |
| Input Configuration | 4 single-ended or 2 pseudo-differential channels - allows flexible sensor interfacing (e.g., thermocouples, RTDs, pressure bridges) with shared COM node. |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire - connects directly to microcontrollers without level shifters or glue logic. |
Pinout & Package
MAX1282BCUE+ is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin functions are validated per Maxim's 19-1688 Rev 0 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Positive supply inputs | Must be tied together and decoupled locally; supports +4.5V to +5.5V operation with 535mW max dissipation at +70°C. |
| CH0–CH3 | Analog input channels | Software-selectable single-ended or pseudo-differential inputs; input range = GND to VDD1 with ±0.5LSB COM stability requirement. |
| COM | Common-mode reference | Sets zero-code voltage in single-ended mode; must remain stable within ±0.5LSB during conversion to avoid error. |
| REF | Reference output/input | Provides buffered +2.500V (typ) when REFADJ = VDD1; accepts external 1V–VDD reference when buffer disabled. |
| REFADJ | Reference buffer control | Adjusts internal reference ±1.5% around 2.5V; connect to VDD1 to disable buffer and use external reference. |
| SCLK, DIN, DOUT, CS, SSTRB | Serial interface signals | 4-wire SPI-compatible interface; SSTRB pulses before MSB for TMS320 sync; all digital I/O tolerate 0–5V swing. |
| SHDN | Hardware shutdown control | Active-low pin reduces supply current to 2µA (typ); automatic wake-up occurs on CS assertion. |
| GND | Analog/digital ground | Single ground plane required; pin 10 serves as common return for analog and digital sections. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold + multiplexer | Eliminates external sample-hold IC and analog switch matrix, reducing BOM count and board area in multi-sensor systems. |
| Four selectable power modes | Enables dynamic power scaling: 2.5mA (normal), 1.3mA (REDP), 0.9mA (FASTPD), 2µA (FULLPD) - ideal for duty-cycled sensing. |
| Software-configurable input polarity | Supports both unipolar (0–VREF) and bipolar (±VREF/2) operation via control byte, simplifying firmware adaptation across sensor types. |
| Internal reference with trim capability | Reduces system cost and layout complexity vs. discrete reference ICs; ±1.5% adjustment covers gain calibration needs. |
| TSSOP-16 package with exposed pad | Enables compact PCB layout and improved thermal performance in space-constrained portable instruments. |
Applications
| Portable Data Logging | Data Acquisition |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100Hz intervals. IC Role / Device Role / Timing Role: ADC front-end converting four analog sensor outputs sequentially with internal reference and low-power shutdown between samples. Use Value: 2.5mA active current and 2µA shutdown extend battery life beyond 1 year on two AA cells; 400ksps headroom supports burst-mode logging. | Use Scenario: Industrial PLC module acquiring analog process signals (4–20mA, 0–10V) from multiple field transmitters. IC Role / Device Role / Timing Role: Precision 12-bit digitizer with pseudo-differential inputs rejecting common-mode noise on long sensor cables. Use Value: ±1 LSB INL and ±0.2 LSB channel-to-channel offset matching ensure consistent channel calibration across 4-input modules. |
| Medical Instruments | Battery-Powered Instruments |
Use Scenario: Portable ECG monitor digitizing lead-I, II, III differential signals with high CMRR and low noise. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC providing 70dB SINAD and 80dB SFDR for clinical-grade waveform fidelity. Use Value: Internal +2.5V reference with ±15ppm/°C TC minimizes baseline drift over body-temperature operating range. | Use Scenario: Handheld multimeter measuring DC voltage, resistance, and continuity with autoranging and backlit LCD. IC Role / Device Role / Timing Role: General-purpose 12-bit ADC handling multiple input ranges via programmable gain and reference selection. Use Value: Single-supply +4.5V to +5.5V operation simplifies power design; REFADJ pin enables factory calibration of accuracy across production units. |
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 reference and external clock generator. | Limited to single-channel use; lacks multiplexer, track/hold, and power-down modes. | Choose only if board space is extremely constrained and system already provides reference/clock infrastructure. |
| MAX11131AUT+T | 12-bit, 500ksps, internal reference, but 10-pin µMAX package - no REFADJ pin, fixed 2.5V reference, no pseudo-differential mode. | Optimized for high-speed single-channel use; lacks channel multiplexing and software-configurable input modes. | Select when higher throughput is critical and multi-channel flexibility is not required. |
Compared with ADS7816U and MAX11131AUT+T, MAX1282BCUE+ uniquely combines 4-channel multiplexing, internal adjustable reference, pseudo-differential support, and four power modes in a single TSSOP-16 package - making it optimal for compact, battery-efficient multi-sensor systems requiring calibrated precision.
Availability
MAX1282BCUE+ is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered industrial sensors requiring stable component supply and guaranteed 0°C to +70°C operation.
Supply support for MAX1282BCUE+ 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 MAX1282BCUE+ belongs to Maxim's high-accuracy, low-power SAR ADC product line - engineered specifically for portable and battery-operated measurement systems where integration, power efficiency, and reference stability are critical.
FAQ
What is the maximum sampling rate supported by the MAX1282BCUE+?
The MAX1282BCUE+ supports a maximum sampling rate of 400ksps when operated with a 6.4MHz serial clock and +4.5V to +5.5V supply. This rate is achieved using 16 SCLK cycles per conversion, and the device maintains ±1 LSB INL and 70dB SINAD at full speed. Conversion time is fixed at 2.5µs, and acquisition time is guaranteed ≤400ns.
Does the MAX1282BCUE+ require an external reference voltage?
No, the MAX1282BCUE+ does not require an external reference voltage - it includes an internal +2.500V ±1.5% reference with adjustable output via the REFADJ pin. However, an external reference from 1V to VDD may be applied to the REF pin when the internal buffer is disabled by pulling REFADJ to VDD1, offering flexibility for systems needing tighter reference tolerance or different voltage levels.
How many analog input channels does the MAX1282BCUE+ support, and what configurations are available?
The MAX1282BCUE+ supports four analog input channels (CH0–CH3) configurable as either four single-ended inputs (with COM as common reference) or two pseudo-differential pairs (CH0/CH1 and CH2/CH3). Input polarity is software-selectable for unipolar (0–VREF) or bipolar (±VREF/2) operation via the 8-bit control byte, enabling versatile sensor interfacing without hardware changes.
What power-saving features does the MAX1282BCUE+ offer?
The MAX1282BCUE+ offers four distinct power modes: normal (2.5mA), reduced power (REDP, 1.3mA), fast power-down (FASTPD, 0.9mA), and full power-down (FULLPD, 2µA). It also includes a hardwired SHDN pin and automatic wake-up on CS assertion. These features allow dynamic power scaling in battery-powered applications - for example, entering FULLPD between measurements and resuming conversion in <1µs upon CS activation.
Is the MAX1282BCUE+ compatible with standard microcontroller serial interfaces?
Yes, the MAX1282BCUE+ is fully compatible with SPI, QSPI, and MICROWIRE serial interfaces. It uses a 4-wire protocol (SCLK, DIN, DOUT, CS) with CPOL = 0 and CPHA = 0 configuration. The SSTRB strobe output enables direct connection to TMS320-family DSPs, and all digital I/O pins operate over the full 0–5V range, eliminating the need for level-shifting circuitry when interfacing with 3.3V or 5V microcontrollers.
MAX1282BCUE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1282BCUE+ FAQ
1.How can I place an order for MAX1282BCUE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1282BCUE+ 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 MAX1282BCUE+ reliable?
The price and inventory of MAX1282BCUE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1282BCUE+ is usually 5 days.
3.What payment methods are accepted for MAX1282BCUE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1282BCUE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1282BCUE+?
MAX1282BCUE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1282BCUE+ 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 MAX1282BCUE+?
For technical support, including MAX1282BCUE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1282BCUE+ requirements.
6.How does Aetrix verify that MAX1282BCUE+ is sourced from the original manufacturer or authorized distributors?
All MAX1282BCUE+ 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 MAX1282BCUE+ meets industry standards.
7.What is the process for return or replacement of MAX1282BCUE+?
All MAX1282BCUE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1282BCUE+, 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 MAX1282BCUE+ part is unused and in its original packaging.
Return procedure for MAX1282BCUE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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