My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1276CTC+T
- Part No.:
- MAX1276CTC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1276CTC+T.pdf
- Description:
- IC ADC 12BIT SAR 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1276CTC+T from Maxim Integrated is a 12-bit, true-differential, serial-output analog-to-digital converter (ADC) with internal 4.096V reference, operating at up to 1.8Msps on a single +4.75V to +5.25V supply. It features unipolar analog input range (0 to VREF), ±1.25 LSB INL, and 70dB SINAD at 525kHz - optimized for high-accuracy industrial data acquisition and motor control systems.
For engineers reviewing the MAX1276CTC+T datasheet, MAX1276CTC+T pinout, MAX1276CTC+T application, or MAX1276CTC+T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts - all grounded in Maxim's official documentation and electrical characteristics tables.
Technical Context
The MAX1276CTC+T employs a successive-approximation register (SAR) architecture with an internal true-differential track-and-hold (T/H), enabling noise-immune sampling of differential signals without external amplification. Its SPI/QSPI/MICROWIRE-compatible 3-wire interface uses CNVST to initiate conversion on its falling edge and SCLK to clock out 12-bit data plus three leading zeros - requiring exactly 16 SCLK cycles per conversion.
It supports three power states: normal mode (13mA typical IDD), partial power-down (2mA), and full power-down (1µA max), with VL pin enabling direct interfacing to 1.8V–5.25V digital logic. The internal 4.096V reference remains active in normal and partial modes but is disabled in full power-down, requiring ≥2ms recovery time after exit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC - delivers 4096 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 1.8Msps maximum throughput - enables digitization of signals up to 20MHz small-signal bandwidth via undersampling techniques. |
| INL | ±1.25 LSB - ensures end-point linearity error ≤ ±0.03% of full scale, critical for precision sensor and process control applications. |
| SINAD | 70dB at 525kHz input - corresponds to ~11.6 effective bits, supporting high-fidelity signal capture in communications and base-station front ends. |
| Supply Voltage | +4.75V to +5.25V analog (VDD); +1.8V to VDD digital (VL) - allows mixed-voltage system integration with low-voltage microcontrollers or DSPs. |
| Power Dissipation | 55mW typical at 1.8Msps - balances speed and efficiency for battery-aware or thermally constrained embedded designs. |
| Shutdown Current | 1µA maximum in full power-down - extends standby time in portable instruments and intermittent-sampling systems. |
Pinout & Package
MAX1276CTC+T is housed in a 12-pin 3mm × 3mm TQFN package with exposed paddle (EP), rated for -40°C to +85°C operation. Pin 1 is AIN-, pin 12 is AIN+, and EP is internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AIN- | Negative analog input | Completes true-differential pair with AIN+; accepts 0 to VREF relative to AIN+, enabling common-mode noise rejection. |
| 2 REF | Internal reference output | Provides stable 4.096V ±10mV (±50ppm/°C) reference; must be bypassed with 0.01µF + 4.7µF to RGND for accuracy. |
| 3 RGND | Reference ground | Separate ground return for REF and internal DAC; must be tied to system GND to prevent reference drift. |
| 4 VDD | Analog supply | +4.75V to +5.25V source for analog core; requires 0.01µF + 10µF bypassing to GND for noise immunity. |
| 5, 11 N.C. | No connection | Unbonded pins; must remain floating - no routing or soldering permitted. |
| 6 GND | Analog/digital ground | Main ground plane connection; internally tied to EP; serves as return for VDD, VL, and digital I/O. |
| 7 VL | Digital I/O supply | Supplies SCLK, CNVST, DOUT logic levels (1.8V–5.25V); decoupling required to minimize digital switching noise coupling into analog path. |
| 8 DOUT | Serial data output | 3-wire SPI-compatible output; MSB-first, 12-bit result preceded by three zeros; transitions on SCLK rising edge. |
| 9 CNVST | Convert start | Active-low control: falling edge initiates T/H hold and conversion; timing window determines power mode (normal/partial/full). |
| 10 SCLK | Serial clock input | Drives conversion timing and data shift-out; supports up to 28.8MHz; idle state (high/low) configurable per host interface. |
| 12 AIN+ | Positive analog input | Primary analog input node; differential voltage AIN+ − AIN− defines conversion result; unipolar range = 0 to VREF. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential T/H input | Rejects common-mode noise up to 20MHz bandwidth while preserving signal integrity - eliminates need for external instrumentation amplifiers in noisy industrial environments. |
| No pipeline delay | Delivers deterministic latency: conversion completes within 0.556µs (16 SCLK cycles), enabling real-time closed-loop control in motor drives. |
| Internal 4.096V reference | Eliminates external reference IC and trimming components; ±50ppm/°C tempco and 0.3mV/mA load regulation ensure stable scaling across temperature and load. |
| Three power modes | Reduces average current from 13mA (active) to 2mA (partial) or 1µA (full shutdown), extending battery life in portable test equipment without sacrificing wake-up speed. |
| 12-pin TQFN package | 3mm × 3mm footprint with exposed paddle improves thermal dissipation (1349mW PD) and reduces PCB area vs. SOIC alternatives - ideal for space-constrained embedded modules. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
|
Use Scenario: High-resolution monitoring of pressure, temperature, and flow sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing sensor outputs at 1.8Msps with ±1.25 LSB INL to maintain calibration traceability across 4–20mA loop interfaces. Use Value: Differential input rejects EMI from nearby VFDs; internal reference eliminates drift-induced gain errors in multi-channel synchronized sampling. |
Use Scenario: Real-time current and voltage sensing in three-phase inverter gate drivers for servo and BLDC motors. IC Role / Device Role / Timing Role: Fast-conversion ADC feeding position/speed estimator algorithms with sub-microsecond latency and deterministic timing. Use Value: No pipeline delay enables precise phase alignment between current samples and PWM edges; 70dB SINAD preserves resolution of harmonic-rich motor waveforms. |
| Portable Test Equipment | Communications Baseband |
|
Use Scenario: Battery-powered handheld multimeters and oscilloscopes requiring high DC accuracy and low standby power. IC Role / Device Role / Timing Role: Core measurement ADC supporting autoranging, auto-zero, and low-power sleep modes between readings. Use Value: Full power-down mode draws only 1µA, enabling >1-year battery life; internal reference avoids recalibration when switching ranges. |
Use Scenario: Digitizing IF signals in wireless infrastructure receivers (e.g., LTE femtocells) where dynamic range and spurious-free performance are critical. IC Role / Device Role / Timing Role: Front-end ADC handling 525kHz–500kHz bandpass signals with 70dB SINAD and -83dBc SFDR. Use Value: True-differential input suppresses even-order distortion; 20MHz full-power bandwidth supports wideband undersampling architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, high-speed, differential ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8326IPW | 16-bit SAR, 1Msps, external reference required, SPI-only interface, no power-down modes | Better resolution but lower speed; requires external 4.096V ref and additional decoupling; lacks partial/full shutdown | Select when 16-bit DC accuracy outweighs 1.8Msps throughput and internal reference convenience. |
| AD7476ARTZ-REEL7 | 12-bit SAR, 1Msps, unipolar only, no internal reference, 6-pin SOT-23 package | Smaller footprint and lower cost, but needs external ref and op-amp for differential input; no TQFN thermal performance | Select for cost-sensitive, space-constrained designs where 1Msps and external signal conditioning are acceptable. |
Compared with ADS8326IPW and AD7476ARTZ-REEL7, the MAX1276CTC+T uniquely combines 1.8Msps speed, true-differential input, internal reference, and three-tier power management - making it optimal for thermally demanding, noise-prone industrial and motor control systems where board space and BOM count are secondary to performance and reliability.
Availability
MAX1276CTC+T is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and portable test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1276CTC+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, automotive, and communications markets.
The MAX1276CTC+T belongs to Maxim's precision data acquisition product line, designed specifically for applications demanding high-speed, low-power, and noise-immune analog-to-digital conversion in harsh electromagnetic environments.
FAQ
What is the analog input configuration of the MAX1276CTC+T?
The MAX1276CTC+T features a true-differential unipolar analog input with AIN+ and AIN− pins. Its input range is 0V to VREF (4.096V), meaning the differential voltage AIN+ − AIN− must stay within that span. Unlike the bipolar MAX1278, it does not accept negative differential inputs - a key distinction confirmed in Maxim's ordering information table and electrical characteristics.
Does the MAX1276CTC+T require an external reference voltage?
No, the MAX1276CTC+T includes a factory-trimmed 4.096V internal reference accessible at the REF pin. This reference drives the internal capacitive DAC and can also serve as a precision voltage source for external circuitry, provided it is properly bypassed with 0.01µF and 4.7µF capacitors to RGND as specified in the datasheet.
How many SCLK cycles are needed to read a full conversion from the MAX1276CTC+T?
A full conversion from the MAX1276CTC+T requires exactly 16 SCLK rising edges. The first 3 bits shifted out are zeros, followed by the 12-bit result in MSB-first order. This timing is fixed and documented in the "Timing Characteristics" table and Figure 5 of the datasheet - no configuration or mode setting alters this requirement.
What is the purpose of the RGND pin on the MAX1276CTC+T?
The RGND pin is the dedicated reference ground for the internal 4.096V reference and the capacitive DAC. It must be connected directly to system GND - not routed through traces or shared with noisy digital grounds - to prevent reference voltage drift and maintain DC accuracy. Maxim explicitly states this in the Pin Description section and Typical Operating Circuit diagram.
Can the MAX1276CTC+T interface directly with a 1.8V microcontroller?
Yes, the MAX1276CTC+T supports 1.8V digital logic via its VL pin. When VL = 1.8V, the SCLK, CNVST, and DOUT signals operate at 1.8V-compatible voltage levels (VIH = 0.7 × VL, VIL = 0.3 × VL), enabling seamless connection to low-voltage MCUs without level-shifting circuitry - a feature verified in the "Digital Inputs" and "Digital Output" electrical characteristics tables.
MAX1276CTC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.8M
- 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:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.8V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-TQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1276CTC+T FAQ
1.How can I place an order for MAX1276CTC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1276CTC+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 MAX1276CTC+T reliable?
The price and inventory of MAX1276CTC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1276CTC+T is usually 5 days.
3.What payment methods are accepted for MAX1276CTC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1276CTC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1276CTC+T?
MAX1276CTC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1276CTC+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 MAX1276CTC+T?
For technical support, including MAX1276CTC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1276CTC+T requirements.
6.How does Aetrix verify that MAX1276CTC+T is sourced from the original manufacturer or authorized distributors?
All MAX1276CTC+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 MAX1276CTC+T meets industry standards.
7.What is the process for return or replacement of MAX1276CTC+T?
All MAX1276CTC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1276CTC+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 MAX1276CTC+T part is unused and in its original packaging.
Return procedure for MAX1276CTC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1276CTC+T 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…
