Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Interface > Sensor and Detector Interfaces

Analog Devices Inc./Maxim Integrated MAX6603ATB+

Name: MAX6603ATB+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6603ATB+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MAX6603ATB+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Sensor and Detector Interfaces

Package:: 10-WFDFN Exposed Pad

Datasheet:: MAX6603ATB+.pdf

Description:: IC COND RTD-VOLT 10-TDFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,272

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

The MAX6603ATB+ from Maxim Integrated is a dual-channel platinum RTD-to-voltage signal conditioner that excites and amplifies signals from two external 200Ω Pt RTDs, delivering ratiometric analog voltage outputs (OUT1/OUT2) with ±6°C max error over +400°C to +600°C, operating from +3V to +5.5V supply across -40°C to +125°C, and featuring integrated fault diagnostics (DG1/DG2) for open/short detection.

For engineers reviewing the MAX6603ATB+ datasheet, MAX6603ATB+ pinout, MAX6603ATB+ application, or MAX6603ATB+ equivalent, this device supports direct interface to microcontroller ADCs without calibration, provides ±5kV ESD protection on RTD inputs, enables high-reliability temperature sensing in automotive engine control and industrial process monitoring, and requires no external precision resistors.

Technical Context

The MAX6603ATB+ implements a fully ratiometric architecture: its 1.0mA (typ) excitation current scales with VCC at 0.2mA/V (typ), and output voltage follows V_OUT = V_CC × R(T)/1000, ensuring immunity to supply variation when paired with V_CC-referenced ADCs. It uses BiCMOS process technology and integrates dedicated fault-detection circuitry per channel.

Each channel independently monitors RTD resistance (150Ω–900Ω range), asserting DG1 or DG2 low on open (>8kΩ), short (<60Ω), or overvoltage (>+16V) conditions; OUT1/OUT2 enter high-impedance state upon respective DG assertion, preserving system integrity during faults.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.0V to 5.5V - compatible with standard automotive and industrial logic rails without level-shifting.
RTD Excitation Current	0.58mA to 1.12mA (typ 1.0mA) - minimizes self-heating error in 200Ω Pt RTDs.
Output Accuracy	±6°C max over +400°C to +600°C - meets tight tolerance requirements for engine control and braking systems.
Input Overvoltage Protection	+16V on RS1+/RS1-/RS2+/RS2− - safeguards against transients in harsh industrial probe environments.
ESD Protection	±5kV HBM on RTD pins - ensures robust operation where long sensor cables are exposed to static discharge.
Operating Temperature	-40°C to +125°C - qualified for under-hood automotive applications and industrial embedded systems.
Package	10-pin TDFN-EP (3mm × 3mm × 0.8mm) - enables compact PCB layout with thermal pad for enhanced power dissipation.

Pinout & Package

MAX6603ATB+ is housed in a 10-pin TDFN-EP package (3mm × 3mm × 0.8mm) with exposed thermal pad (EP) connected to GND. The small footprint supports high-density designs while enabling efficient heat transfer in thermally constrained environments.

Pin/Terminal	Circuit Role	Design Meaning
1 VCC	Power-supply input	Bypassed to GND with 0.1µF capacitor; supplies all internal circuitry including excitation sources and amplifiers.
2 RS2−	RTD Channel 2 negative sense	Completes excitation current path for second Pt RTD; fault detection triggers DG2 low on open/short.
3 RS2+	RTD Channel 2 positive sense	Carries excitation current into second Pt RTD; protected to +16V and ±5kV ESD.
4 RS1+	RTD Channel 1 positive sense	Carries excitation current into first Pt RTD; identical protection and fault detection as RS2+.
5 RS1−	RTD Channel 1 negative sense	Completes excitation path for first Pt RTD; fault detection triggers DG1 low on open/short.
6 GND	Analog and power ground	Reference for all analog signals; EP must be soldered to GND plane for thermal and electrical performance.
7 DG1	Diagnostic output 1	Open-drain output asserted low on RTD1 fault (open >8kΩ, short <60Ω, overvoltage); forces OUT1 high-Z.
8 OUT1	Analog voltage output 1	Ratiometric output (V_OUT1 = V_CC × R_RTD1/1000); high-Z when DG1 active.
9 OUT2	Analog voltage output 2	Ratiometric output (V_OUT2 = V_CC × R_RTD2/1000); high-Z when DG2 active.
10 DG2	Diagnostic output 2	Open-drain output asserted low on RTD2 fault; forces OUT2 high-Z.

Key Features

Feature	Design Value
Fully ratiometric operation	Excitation current and output scaling track V_CC, eliminating supply-induced measurement errors when using V_CC-referenced ADCs.
No calibration required	Delivers specified accuracy with standard 200Ω Pt RTDs; eliminates trim resistors, factory calibration steps, and associated test time.
Dual independent fault diagnostics	DG1/DG2 provide per-channel open-circuit, short-circuit, and overvoltage detection with automatic output disable (high-Z).
High-level analog outputs	OUT1/OUT2 deliver 2.0V–3.8V range (at V_CC=5V) for 200Ω–900Ω RTDs - simplifies ADC interface and improves SNR vs. raw mV-level RTD signals.
Robust input protection	+16V overvoltage tolerance and ±5kV HBM ESD rating on all RTD pins enable reliable use with long, unshielded sensor cables in noisy environments.

Applications

Engine Control Management	Braking Systems
Use Scenario: Monitoring exhaust gas temperature and intake air temperature in diesel engines compliant with EURO IV emissions standards. IC Role / Device Role / Timing Role: Dual-channel RTD signal conditioner converting two Pt RTD probes into calibrated, fault-aware analog voltages for ECU ADC sampling. Use Value: Enables real-time thermal feedback for precise fuel injection timing and aftertreatment control without external calibration components.	Use Scenario: Measuring brake caliper and hydraulic line temperatures in ABS and electronic stability control modules. IC Role / Device Role / Timing Role: High-reliability RTD interface providing ratiometric outputs and diagnostic flags to detect sensor disconnection or shorting during vehicle operation. Use Value: Supports fail-safe braking decisions by asserting DG1/DG2 on fault and disabling analog outputs to prevent erroneous temperature readings.
Industrial Process Measurements	Food Transportation Monitoring
Use Scenario: Continuous temperature logging of chemical reactors, steam lines, and furnace zones in manufacturing plants. IC Role / Device Role / Timing Role: Signal conditioner for dual 200Ω Pt RTDs deployed in hazardous or high-noise industrial settings with long cable runs. Use Value: ±5kV ESD and +16V overvoltage protection ensure stable operation despite EMI and transients common in factory floors.	Use Scenario: Cold-chain monitoring inside refrigerated trucks carrying perishable goods across variable ambient conditions. IC Role / Device Role / Timing Role: Dual RTD interface powering and conditioning temperature sensors at cargo hold entry points and refrigeration unit outlets. Use Value: Ratiometric outputs maintain accuracy across wide supply voltage swings typical in vehicle battery systems (10V–16V).

Engine Control Management

Braking Systems

Use Scenario: Monitoring exhaust gas temperature and intake air temperature in diesel engines compliant with EURO IV emissions standards.

IC Role / Device Role / Timing Role: Dual-channel RTD signal conditioner converting two Pt RTD probes into calibrated, fault-aware analog voltages for ECU ADC sampling.

Use Value: Enables real-time thermal feedback for precise fuel injection timing and aftertreatment control without external calibration components.

Use Scenario: Measuring brake caliper and hydraulic line temperatures in ABS and electronic stability control modules.

IC Role / Device Role / Timing Role: High-reliability RTD interface providing ratiometric outputs and diagnostic flags to detect sensor disconnection or shorting during vehicle operation.

Use Value: Supports fail-safe braking decisions by asserting DG1/DG2 on fault and disabling analog outputs to prevent erroneous temperature readings.

Industrial Process Measurements

Food Transportation Monitoring

Use Scenario: Continuous temperature logging of chemical reactors, steam lines, and furnace zones in manufacturing plants.

IC Role / Device Role / Timing Role: Signal conditioner for dual 200Ω Pt RTDs deployed in hazardous or high-noise industrial settings with long cable runs.

Use Value: ±5kV ESD and +16V overvoltage protection ensure stable operation despite EMI and transients common in factory floors.

Use Scenario: Cold-chain monitoring inside refrigerated trucks carrying perishable goods across variable ambient conditions.

IC Role / Device Role / Timing Role: Dual RTD interface powering and conditioning temperature sensors at cargo hold entry points and refrigeration unit outlets.

Use Value: Ratiometric outputs maintain accuracy across wide supply voltage swings typical in vehicle battery systems (10V–16V).

Equivalent & Alternatives

The following parts are listed as comparable options for similar RTD signal conditioning applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX31865ATJ+	24-bit SPI digital output; supports 2-/3-/4-wire RTDs; requires external MCU firmware for linearization.	Targets systems needing higher resolution and multi-sensor support, not direct analog interface.	Select MAX31865ATJ+ when digital output, flexible wiring, or higher accuracy (<±0.5°C) is required; MAX6603ATB+ preferred for analog simplicity and zero-calibration deployment.
AD7124-4BRUZ	4-channel, low-noise 24-bit Σ-Δ ADC with programmable excitation current and built-in RTD linearization.	Suitable for mixed-signal systems requiring simultaneous temperature, pressure, and voltage measurements.	Choose AD7124-4BRUZ when integrating multiple sensor types and advanced digital filtering is needed; MAX6603ATB+ offers lower BOM count and deterministic analog latency.

Compared with MAX31865ATJ+ and AD7124-4BRUZ, the MAX6603ATB+ delivers immediate analog voltage outputs without software overhead or configuration registers, making it optimal for cost-sensitive, safety-critical applications where deterministic fault response and minimal component count are essential.

Availability

MAX6603ATB+ is available at Aetrix Electronics and suitable for engine control management, braking systems, and industrial process measurements requiring stable component supply, automotive-grade reliability, and zero-calibration deployment.

Supply support for MAX6603ATB+ 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 automotive, industrial, and communications markets.

The MAX6603ATB+ belongs to Maxim's sensor signal conditioning product line, engineered specifically for direct, calibration-free interfacing of platinum RTDs in harsh environments with integrated diagnostics and robust protection.

FAQ

What is the maximum RTD resistance supported by the MAX6603ATB+?

The MAX6603ATB+ supports RTD resistances from 150Ω to 900Ω, covering a temperature range of -40°C to +1000°C for standard 200Ω Pt RTDs. This range corresponds to the full operational specification of the MAX6603ATB+, with accuracy guaranteed across the entire span and optimized error performance between +400°C and +600°C.

Does the MAX6603ATB+ require external calibration components?

No, the MAX6603ATB+ does not require external calibration components. It delivers specified accuracy with standard 200Ω Pt RTDs out-of-the-box, eliminating the need for precision resistors, trimming potentiometers, or factory calibration routines - a key design advantage reflected in the MAX6603ATB+'s simplified bill of materials and reduced test time.

How does the MAX6603ATB+ handle RTD fault conditions?

The MAX6603ATB+ continuously monitors each RTD channel for open circuits (>8kΩ), shorts (<60Ω), and overvoltage events (>+16V). Upon detection, it asserts the corresponding diagnostic output (DG1 or DG2) low and places the associated analog output (OUT1 or OUT2) into high-impedance state - a hardware-level safety mechanism intrinsic to the MAX6603ATB+ architecture.

Can the MAX6603ATB+ operate with non-200Ω Pt RTDs?

Yes, the MAX6603ATB+ can operate with other Pt RTDs as long as their resistance falls within the 150Ω to 900Ω range. While optimized for 200Ω devices, it supports 500Ω RTDs up to +208°C and accommodates custom base resistances via factory consultation - all while maintaining the core functionality and protection features of the MAX6603ATB+.

What is the role of the exposed pad (EP) on the MAX6603ATB+ package?

The exposed pad (EP) on the MAX6603ATB+ TDFN-EP package must be soldered to the PCB ground plane. It serves dual purposes: enhancing thermal dissipation to maintain junction temperature within safe limits (max +150°C), and providing a low-inductance ground return path critical for noise immunity and stable operation of the analog signal chain in the MAX6603ATB+.

MAX6603ATB+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package/Case:: 10-WFDFN Exposed Pad

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Signal Conditioner

Input Type:: Voltage

Output Type:: Logic

Current - Supply:: 5.5 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-TDFN (3x3)

MAX6603ATB+ FAQ

1.How can I place an order for MAX6603ATB+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6603ATB+ 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 MAX6603ATB+ reliable?

The price and inventory of MAX6603ATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6603ATB+ is usually 5 days.

3.What payment methods are accepted for MAX6603ATB+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6603ATB+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6603ATB+?

MAX6603ATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6603ATB+ 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 MAX6603ATB+?

For technical support, including MAX6603ATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6603ATB+ requirements.

6.How does Aetrix verify that MAX6603ATB+ is sourced from the original manufacturer or authorized distributors?

All MAX6603ATB+ 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 MAX6603ATB+ meets industry standards.

7.What is the process for return or replacement of MAX6603ATB+?

All MAX6603ATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6603ATB+, 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 MAX6603ATB+ part is unused and in its original packaging.

Return procedure for MAX6603ATB+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…