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Analog Devices Inc./Maxim Integrated MAX1455AAE+
- Part No.:
- MAX1455AAE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1455AAE+.pdf
- Description:
- IC AUTO SNSR SIGNAL COND 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,584
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Product details
Overview
MAX1455AAE+ from Maxim Integrated is a precision analog sensor signal conditioner IC designed for resistive bridge sensors including pressure transducers, strain gauges, and piezoresistive silicon sensors. It delivers 16-bit offset/span calibration resolution, ratiometric voltage output, on-chip temperature sensing, and 3.2kHz bandwidth - enabling high-accuracy compensation of sensor nonlinearity and thermal drift in automotive and industrial measurement systems.
For engineers reviewing the MAX1455AAE+ datasheet, MAX1455AAE+ pinout, MAX1455AAE+ application, or MAX1455AAE+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-ready availability details for production deployment.
Technical Context
The MAX1455AAE+ implements a fully analog signal path with digitally programmable trimming via four integrated 16-bit DACs - eliminating quantization noise while supporting ±0.02% FSO calibration accuracy. Its architecture includes a 16-step PGA (39–234 V/V gain), on-die temperature sensor, and 768-byte EEPROM storing 176-point temperature-indexed lookup tables for both offset and full-scale output (FSO) correction.
It supports dual-mode operation: ratiometric output referenced to VDD (ideal for battery-powered instruments) or nonratiometric mode using external LDO regulation (for wide-input-voltage systems). Calibration is performed over -40°C to +125°C in ~1.5°C increments, with Secure-Lock™ hardware protection preventing unauthorized EEPROM modification after final calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive and harsh industrial environments. |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V logic rails and stable across automotive battery fluctuations. |
| PGA Gain Range | 39 V/V to 234 V/V in 16 discrete steps - matches sensor sensitivities from 5mV/V to 40mV/V without external gain stages. |
| Offset/FSO DAC Resolution | 16 bits - enables ±76µV fine trim resolution (at 5V ref) for sub-0.02% FSO calibration accuracy. |
| Output Clip Limits | Four selectable ratiometric pairs (e.g., 0.10V/4.90V) - prevents ADC saturation in noisy or transient-prone systems. |
| Frequency Response | 3.2kHz - sufficient for dynamic pressure/strain monitoring up to ~300Hz with margin. |
| EEPROM Size | 768 bytes (6144 bits) - stores configuration, 176-point offset/FSO lookup tables, and 52-byte user data (e.g., serial number). |
Pinout & Package
MAX1455AAE+ is housed in a 16-pin SSOP package (5.0mm × 6.2mm, 0.635mm pitch), optimized for compact sensor modules and PCB space-constrained industrial designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 (TEST1/TEST3/TEST2) | Factory test access | Internally connected during wafer test; must be tied to VSS or left floating in end application - no user function. |
| 2 (OUT) | Analog output | Ratiometric voltage output (0.1V–4.9V range); supports parallel connection with DIO for single-wire calibration. |
| 3 (INP) / 5 (INM) | Differential sensor input | Accepts bridge sensor outputs; polarity swappable via configuration register to simplify layout. |
| 4 (BDR) | Sensor bridge drive | Programmable current source (0.1–2mA) for excitation - eliminates need for external bridge bias circuitry. |
| 6 (VSS) | Negative supply | Ground reference for all analog and digital blocks; requires low-impedance connection to minimize noise coupling. |
| 7 (VDD1), 11 (VDD2) | Positive supplies | VDD1 powers core analog circuitry; VDD2 powers PGA and output stage - decoupling (0.1µF + 0.47µF) isolates noise-sensitive sections. |
| 8 (AMP+), 10 (AMP-), 9 (AMPOUT) | Auxiliary op amp | Uncommitted rail-to-rail op amp (90dB open-loop gain) - usable for filtering, buffering, or custom signal conditioning. |
| 12 (UNLOCK) | Secure-Lock override | Pull-high to disable Secure-Lock and enable serial programming - required for factory recalibration or rework. |
| 13 (DIO) | Single-wire serial I/O | Asynchronous UART interface (4800–38400 baud); bidirectional communication for coefficient loading and diagnostics. |
| 14 (TEST4) | Reserved test pin | No internal connection; must remain unconnected per datasheet - not for system use. |
Key Features
| Feature | Design Value |
|---|---|
| 16-step programmable-gain amplifier | Configurable gain (39–234 V/V) matches sensor sensitivity without external components - reduces BOM count and layout complexity. |
| On-chip temperature sensor + 176-point lookup tables | Enables high-fidelity nonlinear temperature compensation over -40°C to +125°C at ~1.5°C resolution - eliminates costly multi-point oven testing. |
| Secure-Lock™ hardware protection | Prevents post-calibration EEPROM tampering; UNLOCK pin allows controlled factory rework - ensures long-term calibration integrity in field-deployed sensors. |
| Ratiometric output architecture | Output scales with VDD - enables direct interfacing with ratiometric ADCs for supply-independent measurements in battery or automotive systems. |
| Single-pin DIO serial interface | Reduces interconnect count between sensor ASIC and host calibrator - simplifies test fixture design and lowers assembly cost. |
Applications
| Pressure Sensor Signal Conditioning | Piezoresistive Accelerometer Interface |
|---|---|
Use Scenario: High-accuracy pressure transducer module for engine manifold or brake fluid monitoring in automotive ECUs. IC Role / Device Role / Timing Role: Primary analog signal conditioner - performs real-time amplification, offset/span calibration, and temperature-compensated ratiometric output generation. Use Value: Achieves <0.25% total error over -40°C to +125°C using on-chip 176-point lookup tables - eliminates need for external temperature sensors or complex firmware compensation. | Use Scenario: Industrial vibration sensor for predictive maintenance on rotating machinery, requiring stable output across ambient temperature swings. IC Role / Device Role / Timing Role: Bridge sensor interface IC - conditions mV-level differential output, applies gain, and compensates for thermal zero-shift and sensitivity drift. Use Value: 16-bit DAC resolution enables ±0.02% FSO calibration accuracy; ratiometric output ensures immunity to supply rail variations in factory-floor power systems. |
| Strain Gauge Load Cell Module | Humidity Sensor Front-End |
Use Scenario: Precision weighing scale using metal foil strain gauges, deployed in warehouse logistics equipment. IC Role / Device Role / Timing Role: Analog front-end ASIC - provides programmable bridge excitation (BDR), PGA gain staging, and digital trimming of offset/FSO via EEPROM-stored coefficients. Use Value: Integrated 768-byte EEPROM stores calibration data and 52-byte user fields (e.g., calibration date, serial ID) - enables full traceability without external memory. | Use Scenario: Low-power humidity sensor node in smart building HVAC control, operating from coin-cell battery. IC Role / Device Role / Timing Role: Low-noise signal conditioner - delivers 3.2kHz bandwidth and 2.5mVRMS output noise (DC–1kHz) for responsive moisture detection. Use Value: Ratiometric output + 5V supply compatibility allows direct connection to microcontroller's ratiometric ADC - extends battery life by removing reference voltage IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensor signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1452AAE+ | Same pinout and architecture but rated only to +85°C; lacks extended-temp qualification and some EEPROM features. | Suitable for commercial-grade pressure sensors in office equipment or consumer appliances - not for under-hood or industrial ambient use. | Select MAX1452AAE+ only if operating temperature stays ≤+85°C and full -40°C to +125°C calibration coverage is unnecessary. |
| AD8553ARZ | 3-channel programmable gain amplifier with 14-bit DACs; no integrated temperature sensor or lookup table - requires external µC for compensation. | Used where sensor-specific calibration is handled by host processor; better for flexible multi-sensor platforms than dedicated single-sensor modules. | Choose AD8553ARZ when system already includes a capable microcontroller for real-time temperature compensation - avoids ASIC lock-in. |
Compared with MAX1452AAE+, the MAX1455AAE+ adds extended temperature qualification, enhanced EEPROM organization for multipoint calibration, and tighter offset TC specification (±1µV/°C vs. ±2.5µV/°C), making it superior for automotive and industrial deployments demanding long-term stability across extreme thermal cycles.
Availability
MAX1455AAE+ is available at Aetrix Electronics and suitable for automotive pressure sensing, industrial strain gauge instrumentation, and aerospace-grade transducer modules requiring stable component supply, long-lifecycle support, and guaranteed -40°C to +125°C performance.
Supply support for MAX1455AAE+ 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 leader in precision analog and mixed-signal ICs, specializing in high-reliability solutions for automotive, industrial, and medical applications.
The MAX1455 product line was engineered specifically for high-accuracy resistive sensor signal conditioning - integrating amplification, digital trimming, and on-die temperature compensation into a single chip to replace multi-component discrete solutions.
FAQ
What is the maximum operating temperature rating for the MAX1455AAE+?
The MAX1455AAE+ is rated for continuous operation from -40°C to +125°C. This extended temperature range is validated per datasheet specifications and makes the MAX1455AAE+ suitable for under-hood automotive applications, industrial process control, and aerospace sensor modules where thermal robustness is critical. The internal temperature sensor and EEPROM calibration tables are fully characterized across this range.
Does the MAX1455AAE+ require external trim components for calibration?
No, the MAX1455AAE+ does not require external trim components. All calibration is performed digitally using its four integrated 16-bit DACs and 768-byte EEPROM. Offset, span, and temperature compensation coefficients are stored internally and applied in real time - eliminating potentiometers, laser-trimmed resistors, or external DACs. This reduces bill-of-materials cost and improves long-term calibration stability.
Can the MAX1455AAE+ be used with sensors having output sensitivities outside the 5mV/V to 40mV/V range?
The MAX1455AAE+ is specified to accommodate sensor output sensitivities from 5mV/V to 40mV/V using its 16-step PGA and internal DACs. Sensitivities below 5mV/V may result in insufficient signal-to-noise ratio after amplification; above 40mV/V may saturate the input stage. For out-of-range sensors, external attenuation or gain staging is required before the INP/INM inputs - the MAX1455AAE+ itself does not support scaling beyond its native range.
How does the Secure-Lock™ feature work on the MAX1455AAE+?
The Secure-Lock™ feature on the MAX1455AAE+ prevents unauthorized modification of EEPROM-stored calibration coefficients and user data. When enabled (CL[7:0] = 0xFF), writes to EEPROM are blocked unless the UNLOCK pin is pulled high. This ensures calibration integrity after final test. The MAX1455AAE+ retains full functionality in Secure-Lock mode - only programming access is restricted, not analog signal path operation.
Is the MAX1455AAE+ pin-compatible with other variants like MAX1455EAE or MAX1455AUE?
Yes, the MAX1455AAE+ shares identical pinout and footprint with MAX1455EAE (same SSOP package, -40°C to +85°C) and MAX1455AUE (TSSOP package, -40°C to +125°C). However, temperature rating and package type differ: MAX1455AAE+ uses SSOP for +125°C operation, while MAX1455AUE uses TSSOP. Electrical behavior is identical across all variants - only thermal qualification and physical packaging vary.
MAX1455AAE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Automotive
- Input Type:
- Analog
- Output Type:
- Analog
- Current - Supply:
- 6 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
MAX1455AAE+ FAQ
1.How can I place an order for MAX1455AAE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1455AAE+ 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 MAX1455AAE+ reliable?
The price and inventory of MAX1455AAE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1455AAE+ is usually 5 days.
3.What payment methods are accepted for MAX1455AAE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1455AAE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1455AAE+?
MAX1455AAE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1455AAE+ 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 MAX1455AAE+?
For technical support, including MAX1455AAE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1455AAE+ requirements.
6.How does Aetrix verify that MAX1455AAE+ is sourced from the original manufacturer or authorized distributors?
All MAX1455AAE+ 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 MAX1455AAE+ meets industry standards.
7.What is the process for return or replacement of MAX1455AAE+?
All MAX1455AAE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1455AAE+, 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 MAX1455AAE+ part is unused and in its original packaging.
Return procedure for MAX1455AAE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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