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Analog Devices Inc./Maxim Integrated MAX1280BCUP+T
- Part No.:
- MAX1280BCUP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1280BCUP+T.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,937
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Product details
Overview
MAX1280BCUP+T from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with integrated track/hold, multiplexer, and internal +2.5V reference. It operates from a single +4.5V to +5.5V supply, achieves 400ksps sampling rate, supports software-configurable unipolar/bipolar and single-ended/pseudo-differential inputs, and targets portable data acquisition systems requiring low power and high channel density.
For engineers reviewing the MAX1280BCUP+T datasheet, MAX1280BCUP+T pinout, MAX1280BCUP+T application, or MAX1280BCUP+T equivalent, this page delivers verified electrical specs, TSSOP-20 pin mapping, real-world use cases in battery-powered instrumentation, and two validated alternative parts for design flexibility and supply continuity.
Technical Context
The MAX1280BCUP+T uses successive-approximation register (SAR) architecture with an on-chip track/hold circuit and 8:1 analog multiplexer. Its conversion timing is clocked by an external serial interface clock (up to 6.4MHz), requiring 16 SCLK cycles per 12-bit result.
It features four software-selectable power modes - normal (2.5mA), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA) - with automatic wake-up via serial interface access and sub-1µs turn-on time enabling per-conversion power gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precision measurement applications. |
| Sampling Rate | 400ksps - supports real-time capture of signals up to ~195kHz Nyquist bandwidth. |
| INL | ±1 LSB - ensures monotonicity and ≤0.024% full-scale linearity error across temperature. |
| Supply Voltage | +4.5V to +5.5V - single-supply operation compatible with standard 5V logic and industrial rails. |
| Reference | Internal +2.500V ±1.5% adjustable - eliminates external reference component while supporting ±1.22V to VDD1 external reference range. |
| Power Modes | Four software-controlled states - enables dynamic current scaling from 2.5mA down to 2µA without hardware changes. |
| SINAD | 70dB at 100kHz - provides >11.6 effective number of bits (ENOB) for medium-bandwidth signal fidelity. |
Pinout & Package
MAX1280BCUP+T is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm pitch, exposed pad optional, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Positive supply inputs | Separate analog/digital supply pins - decoupling each reduces noise coupling into ADC core. |
| GND | Analog and digital ground | Common reference for all analog and digital circuits; requires low-impedance PCB connection. |
| CH0–CH7 | Analog input channels | Eight single-ended or four pseudo-differential input pairs - selectable via control byte. |
| COM | Common-mode reference | Sets zero-code voltage in single-ended mode; must remain stable within ±0.5LSB during conversion. |
| REF, REFADJ | Reference voltage terminals | REF outputs internal +2.5V; REFADJ adjusts reference or disables buffer when tied to VDD1. |
| CS, SCLK, DIN, DOUT, SSTRB | 4-wire SPI-compatible serial interface | Supports direct connection to microcontrollers without level-shifting or glue logic. |
| SHDN | Hardware shutdown control | Active-low pin forces full power-down (2µA) independent of software state. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel analog multiplexer + track/hold | Reduces external signal conditioning components and enables sequential multi-sensor sampling with <468ns acquisition time. |
| Software-configurable input mode | Single-ended or pseudo-differential operation selected per conversion - supports flexible sensor interfacing without hardware rework. |
| Internal +2.5V reference with ±1.5% adjustability | Eliminates need for external reference IC or resistor divider; REFADJ allows fine-tuning or disabling for external reference use. |
| Four programmable power modes | Enables adaptive power management - e.g., full power-down between samples cuts average current to <100µA at low sampling rates. |
| SPI/QSPI/MICROWIRE/TMS320 compatibility | Direct interface to common DSP and MCU families using standard 4-wire protocol - no firmware translation layer required. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
|
Use Scenario: Battery-powered handheld logger capturing temperature, pressure, and ECG waveforms over hours. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple analog sensors with low quiescent current and software-triggered conversions. Use Value: 400ksps rate and 12-bit resolution support high-fidelity waveform capture; 2µA full power-down extends battery life beyond 1 year on coin cell. |
Use Scenario: Portable blood glucose meter with multi-electrode amperometric sensing and LCD display. IC Role / Device Role / Timing Role: Precision analog front-end ADC converting low-level sensor currents with calibrated offset/gain compensation. Use Value: ±1 LSB INL and internal reference ensure repeatable clinical-grade measurements; TSSOP-20 footprint fits compact PCB layouts. |
| Battery-Powered Instruments | Process Control Sensors |
|
Use Scenario: Handheld multimeter with auto-ranging, true RMS, and Bluetooth telemetry. IC Role / Device Role / Timing Role: High-speed, low-noise ADC handling AC/DC voltage, current, and resistance measurements. Use Value: 70dB SINAD and 6MHz full-power bandwidth enable accurate RMS calculation; single 5V supply simplifies power design. |
Use Scenario: Industrial field transmitter monitoring tank level, flow, and valve position in hazardous environments. IC Role / Device Role / Timing Role: Robust, temperature-stable ADC interfacing 4–20mA loop sensors and local analog transducers. Use Value: ±0.8ppm/°C gain-error TC and ±1 LSB INL over 0°C to +70°C ensure calibration stability across operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel, serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, single-supply +2.7V to +5.25V, no internal reference, SPI-only interface. | Lacks internal reference and track/hold; requires external REF and signal conditioning for multi-channel use. | Choose when lower cost and smaller footprint are critical, and external reference/TH are already present in design. |
| MAX11131ETE+ | 12-bit, 500ksps, 8-channel, internal reference, SPI/QSPI, but +2.7V to +3.6V only supply range. | Higher speed but incompatible with 5V systems; different power sequencing and register map. | Prefer for new 3.3V designs needing faster throughput; not drop-in for existing MAX1280BCUP+T 5V layouts. |
Compared with ADS7822U and MAX11131ETE+, the MAX1280BCUP+T uniquely combines 5V operation, integrated track/hold, internal adjustable reference, and four power modes - making it optimal for legacy 5V portable instrumentation where BOM count and supply flexibility matter.
Availability
MAX1280BCUP+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered instruments requiring stable component supply across extended production lifecycles.
Supply support for MAX1280BCUP+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 MAX1280 series belongs to Maxim's precision data acquisition product line, designed specifically for low-power, multi-channel, single-supply ADC applications in portable and embedded systems.
FAQ
What is the maximum sampling rate of the MAX1280BCUP+T?
The MAX1280BCUP+T achieves a maximum sampling rate of 400ksps under specified conditions: VDD1 = VDD2 = +4.5V to +5.5V, fSCLK = 6.4MHz, and 16 clock cycles per conversion. This rate is guaranteed across the 0°C to +70°C operating temperature range and supports real-time capture of signals up to ~195kHz.
Does the MAX1280BCUP+T include an internal voltage reference?
Yes, the MAX1280BCUP+T integrates a precision +2.500V ±1.5% reference with adjustable output via the REFADJ pin. When used in internal reference mode, REF outputs 2.5V nominal; pulling REFADJ to VDD1 disables the buffer for external reference use (1V to VDD1 range supported).
How many analog input channels does the MAX1280BCUP+T support?
The MAX1280BCUP+T supports eight single-ended analog inputs (CH0–CH7) or four pseudo-differential input pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7), all selectable via software-configurable control byte written to the DIN pin before each conversion.
What power-saving modes are available on the MAX1280BCUP+T?
The MAX1280BCUP+T offers four software-selectable power modes: normal operation (2.5mA), reduced-power mode (1.3mA), fast power-down (0.9mA), and full power-down (2µA). Hardware SHDN pin also forces full power-down independently of software state.
Is the MAX1280BCUP+T compatible with standard microcontroller serial interfaces?
Yes, the MAX1280BCUP+T features a 4-wire SPI-compatible serial interface (CS, SCLK, DIN, DOUT) with SSTRB strobe output. It works directly with SPI, QSPI, and MICROWIRE controllers - configure CPOL = 0 and CPHA = 0 for standard SPI timing alignment.
MAX1280BCUP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-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:
- 4, 8
- 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:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1280BCUP+T FAQ
1.How can I place an order for MAX1280BCUP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1280BCUP+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 MAX1280BCUP+T reliable?
The price and inventory of MAX1280BCUP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1280BCUP+T is usually 5 days.
3.What payment methods are accepted for MAX1280BCUP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1280BCUP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1280BCUP+T?
MAX1280BCUP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1280BCUP+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 MAX1280BCUP+T?
For technical support, including MAX1280BCUP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1280BCUP+T requirements.
6.How does Aetrix verify that MAX1280BCUP+T is sourced from the original manufacturer or authorized distributors?
All MAX1280BCUP+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 MAX1280BCUP+T meets industry standards.
7.What is the process for return or replacement of MAX1280BCUP+T?
All MAX1280BCUP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1280BCUP+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 MAX1280BCUP+T part is unused and in its original packaging.
Return procedure for MAX1280BCUP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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