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Analog Devices Inc./Maxim Integrated MAX1452CAE+T
- Part No.:
- MAX1452CAE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1452CAE+T.pdf
- Description:
- IC SENSOR SIGNAL COND 16-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
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Product details
Overview
The MAX1452CAE+T from Maxim Integrated is a precision analog sensor signal conditioner optimized for resistive bridge sensors in industrial process control. It integrates a 16-step PGA (39–234 V/V), four 16-bit DACs, 768-byte EEPROM, on-chip temperature sensor, and uncommitted op amp - enabling offset/FSO calibration and first- and second-order temperature compensation with ±76 µV DAC resolution and 150 µs step response. It supports 4–20 mA, 0–5 V, and ratiometric outputs in pressure transducers and strain gauge systems.
For engineers reviewing the MAX1452CAE+T datasheet, MAX1452CAE+T pinout, MAX1452CAE+T application, or MAX1452CAE+T equivalent, key selection criteria include its fully analog signal path (zero quantization noise), single-pin DIO programming interface, Secure-Lock™ EEPROM protection, 2 mA supply current for loop-powered 4–20 mA designs, and support for sensor sensitivities from 4 mV/V to 60 mV/V.
Technical Context
The MAX1452CAE+T implements a hybrid analog-digital architecture: sensor excitation and amplification are fully analog, while trimming uses digitally controlled 16-bit DACs referenced to VDD (+5 V) or VBDR (+2.5 V). Its 8-bit temperature ADC indexes 176-entry EEPROM lookup tables for offset and FSO correction at ~1.5°C intervals across –40°C to +125°C.
Calibration is performed via asynchronous serial DIO (4800–38,400 bps), with automatic baud detection. The device supports both current- and voltage-mode bridge drive, and includes dedicated FSOTC/Offset TC DACs with internal 75 kΩ resistors optimized for silicon piezoresistive sensors - configurable to use external resistors when needed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - enables direct operation from standard +5 V rails without regulation overhead |
| Supply Current | 2.0–2.5 mA - allows full functionality in 2-wire, loop-powered 4–20 mA sensor systems |
| PGA Gain Range | 39 V/V to 234 V/V in 16 discrete steps - matches wide sensor output sensitivity (4–60 mV/V) |
| DAC Resolution | 16 bits - provides ±0.02% of span calibration accuracy and 76 µV/bit step size (VDD-referenced) |
| Temperature Indexing | ~1.5°C per EEPROM address - enables precise nonlinear temperature compensation over –40°C to +125°C |
| Step Response | 150 µs to 63% final value - supports fast dynamic pressure or force measurements |
| EEPROM Size | 768 bytes (6144 bits) - stores configuration, 176-point offset/FSO lookup tables, OTCDAC/FSOTCDAC registers, and 52 bytes of user data |
Pinout & Package
The MAX1452CAE+T is housed in a 16-pin SSOP package (0°C to +70°C operating range), with exposed pad not present. Pin functions are electrically validated per Maxim's official pin description table and match SSOP/TSSOP mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISRC | Bridge drive current mode select | Configures internal current source for resistive bridge excitation; sets bias for sensor power |
| 2 OUT | Main analog output signal | High-ESD, low-noise output supporting 4–20 mA, 0–5 V, or ratiometric configurations; may be paralleled with DIO |
| 3 VSS | Negative supply reference | Ground return for all analog and digital circuitry; must connect 0.1 µF bypass capacitor |
| 4 INM | Negative bridge input | Differential input for Wheatstone bridge; polarity swappable with INP via configuration register |
| 5 BDR | Bridge drive output | Provides regulated current or voltage to sensor bridge; referenced internally for FSOTC/Offset TC DACs |
| 6 INP | Positive bridge input | Differential input complementary to INM; polarity swappable with INM via configuration register |
| 7 VDD | Positive analog/digital supply | +4.5 V to +5.5 V main power rail; requires 0.1 µF decoupling to VSS |
| 8 TEST | Internal test connection | Internally tied; must be connected to VSS for normal operation |
| 9 VDDF | EEPROM supply voltage | +4.5 V to +5.5 V dedicated rail for EEPROM; improved noise immunity when isolated via 30 Ω resistor from VDD |
| 10 UNLOCK | Secure-Lock override enable | Logic-high assertion disables Secure-Lock™ to permit EEPROM reprogramming during factory recalibration |
| 11 DIO | Serial digital I/O | Asynchronous half-duplex interface for calibration coefficient loading; auto-baud detects 4800–38,400 bps |
| 12 CLK1M | 1 MHz clock output | Configurable gated output of internal oscillator; useful for system timing synchronization or external logic |
| 13 AMPOUT | Uncommitted op amp output | General-purpose buffer/output stage; used in 4–20 mA driver circuits and filtering networks |
| 14 AMP− | Op amp inverting input | High-impedance node for feedback or signal conditioning; supports unity-gain bandwidth up to 2 MHz |
| 15 AMP+ | Op amp noninverting input | High-impedance input for sensor signal buffering or reference generation |
| 16 FSOTC | Full-span temperature coefficient buffered output | Analog output of FSOTC DAC; drives external compensation networks or serves as diagnostic monitor |
Key Features
| Feature | Design Value |
|---|---|
| Fully analog signal path | Eliminates quantization noise in sensor output - critical for high-resolution industrial measurement |
| 16-bit offset and span DACs | Enables true interchangeability of calibrated sensors across production batches without manual trim |
| On-chip temperature sensor + 176-point lookup tables | Supports flexible multi-point temperature compensation - from linear correction to custom thermal curves |
| Secure-Lock™ EEPROM protection | Prevents post-calibration tampering of coefficients while allowing hardware-enabled factory rework via UNLOCK pin |
| Single-pin DIO programming | Reduces PCB routing complexity and enables calibration on same line as sensor output (OUT/DIO parallel) |
| Integrated uncommitted op amp | Enables complete 4–20 mA transmitter design with no external active components beyond transistor and resistors |
Applications
| Pressure Sensors | Strain Gauges |
|---|---|
Use Scenario: High-stability differential pressure sensing in HVAC and process control transmitters. IC Role / Device Role / Timing Role: Signal conditioner performing bridge excitation, gain scaling, offset nulling, and temperature-compensated FSO adjustment. Use Value: Delivers <0.25% total error over –25°C to +85°C using internal 176-point lookup tables and dual 16-bit DACs. | Use Scenario: Load-cell-based weighing systems requiring long-term zero stability and thermal drift compensation. IC Role / Device Role / Timing Role: Analog front-end providing programmable bridge drive, PGA gain selection, and real-time temperature-indexed offset correction. Use Value: Achieves ±0.02% span calibration accuracy and <150 µs step response for dynamic load monitoring. |
| Transducers and Transmitters | Humidity Sensors |
Use Scenario: Industrial 4–20 mA current-loop transmitters for remote analog sensor data transmission. IC Role / Device Role / Timing Role: Complete analog signal processor powering the sensor, conditioning its output, and driving the loop with integrated op amp. Use Value: Operates at only 2.5 mA supply current - enabling full functionality directly from 2-wire loop power. | Use Scenario: Precision capacitive or resistive humidity sensing in environmental monitoring equipment. IC Role / Device Role / Timing Role: Low-noise amplifier and ratiometric output generator compensating for sensor TCR and die temperature mismatch. Use Value: Supports ratiometric output (0.5–4.5 V) referenced to bridge voltage - eliminating supply dependency in battery-powered instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog sensor signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1455EEE+ | Higher integration: includes 12-bit ADC, SPI interface, and enhanced EEPROM organization; operates from –40°C to +125°C | Targeted at higher-accuracy, digital-output sensor modules requiring embedded digitization | Select MAX1455EEE+ when system-level digitization and SPI host interface are required; MAX1452CAE+T remains optimal for pure analog output and minimal BOM cost |
| AD8555ACPZ-REEL7 | Single-channel, rail-to-rail chopper-stabilized amplifier with programmable gain (1–1000 V/V); no integrated EEPROM or temperature sensor | Suited for simpler offset/gain trimming where external MCU handles calibration and temperature compensation | Choose AD8555ACPZ-REEL7 for lower-cost, discrete analog signal chains where firmware-based calibration is already implemented |
Compared with MAX1455EEE+, the MAX1452CAE+T offers lower system cost and simpler layout for analog-output sensors but lacks on-chip ADC and SPI. Versus AD8555ACPZ-REEL7, it delivers turnkey calibration, temperature compensation, and EEPROM storage - reducing firmware development and test station complexity.
Availability
The MAX1452CAE+T is available at Aetrix Electronics and suitable for pressure transmitters, industrial strain gauge interfaces, and loop-powered 4–20 mA sensor systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1452CAE+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 MAX1452CAE+T belongs to Maxim's precision sensor signal conditioner product line, designed specifically to replace discrete op amp, DAC, and reference solutions in bridge-based sensor systems - delivering calibrated, temperature-compensated analog outputs with minimal external components.
FAQ
What is the operating temperature range of the MAX1452CAE+T?
The MAX1452CAE+T is rated for commercial temperature operation from 0°C to +70°C. This range is defined by its 16-pin SSOP package variant and applies to all electrical specifications unless otherwise noted. It does not support extended industrial (–40°C to +85°C) or automotive (–40°C to +125°C) ranges - those require MAX1452EAE+ or MAX1452AAE+ variants respectively.
Does the MAX1452CAE+T support both current and voltage bridge excitation?
Yes, the MAX1452CAE+T supports both current and voltage bridge excitation modes. Pin ISRC configures the internal current source for constant-current drive, while BDR can deliver regulated voltage excitation. The device's FSOTC and Offset TC DACs reference the bridge voltage (VBDR ≈ +2.5 V), enabling accurate temperature compensation regardless of excitation method - a key feature confirmed in the functional diagram and Electrical Characteristics table.
How does the MAX1452CAE+T achieve temperature compensation without external components?
The MAX1452CAE+T achieves temperature compensation using its on-chip 8-bit temperature ADC, which indexes 176-point EEPROM lookup tables for offset and FSO correction. It also employs two dedicated 16-bit DACs (Offset TC and FSOTC) that reference the bridge voltage, allowing first-order compensation with <38 µV step resolution. No external thermistor or ADC is required - all sensing, computation, and analog correction occur internally.
Can the MAX1452CAE+T be used in a 2-wire, loop-powered 4–20 mA system?
Yes, the MAX1452CAE+T is explicitly designed for 2-wire loop-powered 4–20 mA systems. Its 2.0–2.5 mA supply current enables full functionality from the loop itself, and its integrated uncommitted op amp (AMP+, AMP−, AMPOUT) is intended for building efficient current-output stages - as demonstrated in Figure 4 of the datasheet. External components required are minimal: one transistor, feedback resistors, and bypass capacitors.
What is the purpose of the Secure-Lock™ feature in the MAX1452CAE+T?
The Secure-Lock™ feature in the MAX1452CAE+T prevents unauthorized modification of stored calibration coefficients and 52 bytes of user EEPROM data after final calibration. It is enabled by writing 0xFF to the Secure-Lock byte (CL[7:0]). Once locked, writes to EEPROM are blocked unless the UNLOCK pin is asserted high - providing hardware-enforced protection against field corruption while permitting factory recalibration.
MAX1452CAE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Signal Conditioner
- Input Type:
- Analog
- Output Type:
- Analog
- Current - Supply:
- 2.5 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
MAX1452CAE+T FAQ
1.How can I place an order for MAX1452CAE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1452CAE+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 MAX1452CAE+T reliable?
The price and inventory of MAX1452CAE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1452CAE+T is usually 5 days.
3.What payment methods are accepted for MAX1452CAE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1452CAE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1452CAE+T?
MAX1452CAE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1452CAE+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 MAX1452CAE+T?
For technical support, including MAX1452CAE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1452CAE+T requirements.
6.How does Aetrix verify that MAX1452CAE+T is sourced from the original manufacturer or authorized distributors?
All MAX1452CAE+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 MAX1452CAE+T meets industry standards.
7.What is the process for return or replacement of MAX1452CAE+T?
All MAX1452CAE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1452CAE+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 MAX1452CAE+T part is unused and in its original packaging.
Return procedure for MAX1452CAE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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