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Analog Devices Inc./Maxim Integrated MAX1288ETA+T
- Part No.:
- MAX1288ETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX1288ETA+T.pdf
- Description:
- IC ADC 12BIT SAR 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
MAX1288ETA+T from Maxim Integrated is a 12-bit, true-differential successive-approximation ADC operating from a single +5V supply, delivering 150ksps sampling rate, ±1.0 LSB INL, and 70dB SINAD at 10kHz input. It features software-configurable unipolar/bipolar conversion, SPI/QSPI/MICROWIRE-compatible 3-wire interface, and internal conversion clock - designed for precision low-power sensor signal digitization in space-constrained portable systems.
For engineers reviewing the MAX1288ETA+T datasheet, MAX1288ETA+T pinout, MAX1288ETA+T application, or MAX1288ETA+T equivalent, this page delivers verified electrical specs, TDFN-EP package layout, differential input timing behavior, and real-world selection guidance against functionally aligned alternatives.
Technical Context
The MAX1288ETA+T implements a SAR architecture with an integrated true-differential track-and-hold, supporting unipolar (0 to VREF) and bipolar (±VREF/2) input ranges via CNVST pulse sequencing. Its internal 4MHz oscillator enables deterministic 3.7µs conversion time without external clock dependency.
It uses a single-ended CNVST signal to control power-up, track/hold transition, input polarity selection, and automatic shutdown - eliminating need for separate control lines. The 3-wire serial interface operates up to 8MHz with MSB-first output, compatible with SPI/QSPI/MICROWIRE masters using CPOL=0/CPHA=0 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity analog signal representation. |
| Sampling Rate | 150ksps - supports real-time acquisition of signals up to ~75kHz Nyquist bandwidth. |
| INL / DNL | ±1.0 LSB / ±1.0 LSB - ensures monotonicity and end-point linearity critical for closed-loop control accuracy. |
| SINAD @ 10kHz | 70 dB - enables >11.3 effective bits for precision measurement applications like temperature monitoring. |
| Supply Current @ 150ksps | 245 µA at +5V - achieves 0.5mW total power, enabling battery operation for >1 year in low-duty-cycle sensing nodes. |
| Input Type | True-differential (AIN+/AIN−) - rejects common-mode noise and supports bipolar signal conditioning without external op-amps. |
| Reference Input | External VREF (1.0V to VDD+50mV) - allows flexible full-scale scaling (e.g., 4.096V for LSB = 1mV) with 0.1µF bypass. |
Pinout & Package
MAX1288ETA+T is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed pad (EP) for thermal enhancement and grounding. Pin 1 is marked by a dot or notch; EP must be soldered to PCB ground plane for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | +4.75V to +5.25V operation; requires local 0.1µF ceramic bypass to GND for comparator stability. |
| AIN+ (Pin 2) | Differential positive analog input | Accepts voltage from GND to VDD+50mV; paired with AIN− for true-differential sampling. |
| AIN− (Pin 3) | Differential negative analog input | Completes differential pair; both inputs must stay within GND–0.3V to VDD+0.3V for ESD protection. |
| GND (Pin 4) | Analog/digital ground reference | Single ground connection point; tie to system star ground and EP for minimal noise coupling. |
| REF (Pin 5) | External reference voltage input | Defines full-scale range (e.g., 4.096V); must be bypassed with 0.1µF capacitor to GND. |
| CNVST (Pin 6) | Conversion start & mode control | Rising edge powers up IC; falling edge triggers hold/conversion; pulse width/config selects unipolar/bipolar mode. |
| DOUT (Pin 7) | Serial data output | 3-state, MSB-first output; transitions on SCLK falling edge; goes high-Z after 12-bit read completes. |
| SCLK (Pin 8) | Serial clock input | Accepts 0–8MHz clock; determines data readout speed; no duty cycle constraint beyond 30–70% min/max. |
| EP | Exposed thermal pad | Must be connected to PCB ground plane for thermal dissipation and reduced ground inductance. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential T/H input | Enables rejection of common-mode interference in noisy industrial or motor-drive environments without external instrumentation amps. |
| Software-configurable unipolar/bipolar mode | Eliminates need for external level-shifting circuitry when measuring AC-coupled or bidirectional sensor outputs (e.g., strain gauges). |
| AutoShutdown between conversions | Reduces current to 0.2µA during idle periods - extends battery life in intermittent-sampling applications like wireless sensor nodes. |
| SPI/QSPI/MICROWIRE compatibility | Interoperates directly with standard microcontroller serial peripherals without glue logic or protocol translation firmware. |
| Internal conversion clock | Removes dependency on precise external clock source; simplifies BOM and layout while guaranteeing fixed 3.7µs conversion latency. |
Applications
| Portable Temperature Monitors | Flowmeters |
|---|---|
Use Scenario: Battery-powered handheld thermometers measuring thermistor or RTD bridges with millidegree resolution. IC Role / Device Role / Timing Role: True-differential ADC digitizing bridge output while rejecting EMI from display backlight or RF modules. Use Value: 70dB SINAD and ±1.0 LSB INL ensure <±0.1°C measurement uncertainty over -40°C to +85°C without calibration. |
Use Scenario: Ultrasonic or magnetic flow sensors generating low-level differential voltage proportional to fluid velocity. IC Role / Device Role / Timing Role: High-precision digitizer capturing fast transient pulses with 150ksps throughput and minimal aperture jitter (<50ps). Use Value: Internal T/H and 1MHz small-signal bandwidth support accurate undersampling of high-frequency flow transients. |
| Touch Screens | Low-Power Data Acquisition |
Use Scenario: Resistive touch panel controllers in medical tablets requiring low-noise position detection under variable lighting conditions. IC Role / Device Role / Timing Role: Differential ADC measuring X/Y electrode voltage ratios while rejecting common-mode noise from LCD drivers. Use Value: Bipolar mode enables direct digitization of signed delta-voltage signals without external op-amp biasing. |
Use Scenario: Remote environmental sensors logging temperature, humidity, and pressure with multi-year battery life. IC Role / Device Role / Timing Role: Low-power ADC performing periodic 12-bit conversions with AutoShutdown reducing average current to sub-µA levels. Use Value: 245µA at 150ksps and 0.2µA shutdown enable >5-year operation on a single CR2032 cell at 1-sample-per-second duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar true-differential 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 16-bit resolution, 200ksps, +5V-only, no AutoShutdown, SPI-only interface | Higher resolution but higher power (1.2mA active); lacks differential input - requires external instrumentation amp for true-differential signals | Select when 16-bit precision outweighs power and board space constraints; avoid if true-differential front-end is required without added components. |
| AD7476ARTZ-REEL7 | 12-bit, 1MSPS, +2.35V to +5.25V, single-ended only, no internal reference or T/H | Higher speed but no differential capability; requires external reference and driver for differential sources | Choose for high-speed single-ended applications where differential rejection is not needed; unsuitable as drop-in replacement for MAX1288ETA+T's differential architecture. |
Compared with ADS7816U and AD7476ARTZ-REEL7, MAX1288ETA+T uniquely integrates true-differential input, AutoShutdown, and internal clock in a 3mm×3mm TDFN - making it the only option that delivers 12-bit precision, differential noise immunity, and micropower operation without external support circuitry.
Availability
MAX1288ETA+T is available at Aetrix Electronics and suitable for portable temperature monitors, flowmeters, and touch screens requiring stable component supply across extended production lifecycles.
Supply support for MAX1288ETA+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) designs high-performance analog and mixed-signal ICs for demanding industrial, medical, and portable applications.
MAX1288ETA+T belongs to the MAX1286–MAX1289 family of micropower, serial-output ADCs engineered specifically for battery-powered data-acquisition systems where size, power, and differential signal integrity are critical.
FAQ
What is the maximum sampling rate of the MAX1288ETA+T?
The MAX1288ETA+T achieves a maximum sampling rate of 150ksps. This is guaranteed under specified conditions: VDD = +4.75V to +5.25V, fSCLK ≤ 8MHz, and proper REF bypassing. At this rate, the device draws 245µA from the +5V supply and completes each conversion in 3.7µs, including acquisition and hold phases. Lower sampling rates reduce current consumption proportionally - e.g., 15µA at 10ksps.
Does the MAX1288ETA+T support true-differential input?
Yes, the MAX1288ETA+T natively supports true-differential input via dedicated AIN+ (Pin 2) and AIN− (Pin 3) terminals. It performs simultaneous sampling of both inputs and digitizes their difference, enabling common-mode noise rejection. Unlike pseudo-differential or single-ended variants, this architecture eliminates the need for external instrumentation amplifiers when interfacing with differential sensors such as bridge-based transducers.
How does unipolar vs. bipolar mode selection work on the MAX1288ETA+T?
Unipolar and bipolar modes on the MAX1288ETA+T are selected via CNVST pulse sequencing: a single high pulse followed by a falling edge configures unipolar mode (0 to VREF), while a high–low–high CNVST sequence configures bipolar mode (±VREF/2). In unipolar mode, output is straight binary; in bipolar mode, output is two's complement. Both modes use the same AIN+/AIN− pins and require no external hardware changes.
What package type is used for the MAX1288ETA+T?
The MAX1288ETA+T uses an 8-pin TDFN-EP (Thin Dual Flat No-lead with Exposed Pad) package measuring 3mm × 3mm × 0.75mm. The exposed pad (EP) must be soldered to a PCB ground plane for thermal management and noise reduction. Top marking is "+AFT", and the package is RoHS-compliant and lead(Pb)-free per Maxim's ordering information.
Is an external reference required for the MAX1288ETA+T?
Yes, the MAX1288ETA+T requires an external reference voltage applied to the REF pin (Pin 5). The reference must be between +1.0V and VDD+50mV - typically +4.096V for +5V operation - and must be bypassed with a 0.1µF ceramic capacitor to GND. No internal reference is provided; this design allows users to optimize full-scale range and noise performance based on system requirements.
MAX1288ETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 150k
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-TDFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1288ETA+T FAQ
1.How can I place an order for MAX1288ETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1288ETA+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 MAX1288ETA+T reliable?
The price and inventory of MAX1288ETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1288ETA+T is usually 5 days.
3.What payment methods are accepted for MAX1288ETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1288ETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1288ETA+T?
MAX1288ETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1288ETA+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 MAX1288ETA+T?
For technical support, including MAX1288ETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1288ETA+T requirements.
6.How does Aetrix verify that MAX1288ETA+T is sourced from the original manufacturer or authorized distributors?
All MAX1288ETA+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 MAX1288ETA+T meets industry standards.
7.What is the process for return or replacement of MAX1288ETA+T?
All MAX1288ETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1288ETA+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 MAX1288ETA+T part is unused and in its original packaging.
Return procedure for MAX1288ETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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