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Analog Devices Inc./Maxim Integrated MAX1452EAE+T
- Part No.:
- MAX1452EAE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1452EAE+T.pdf
- Description:
- IC SENSOR SIGNAL COND 16-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
MAX1452EAE+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. Its fully analog signal path delivers 0.01% gain nonlinearity and supports 4–20mA, 0–5V, and ratiometric outputs in pressure transducer calibration systems.
For engineers reviewing the MAX1452EAE+T datasheet, MAX1452EAE+T pinout, MAX1452EAE+T application, or MAX1452EAE+T equivalent, key selection considerations include its -40°C to +85°C operating range, 16-pin SSOP package, 2mA supply current, 150µs step response, and support for multipoint temperature compensation via 176-entry lookup tables.
Technical Context
The MAX1452EAE+T implements a hybrid analog-digital architecture: sensor excitation and amplification are fully analog, while trimming uses 16-bit DACs with EEPROM-stored coefficients. Offset and full-span output (FSO) are calibrated independently using dedicated DACs referenced to either VDD (+5V) or bridge voltage (~+2.5V), enabling ±76µV (ODAC/FSODAC) and ±38µV (OTCDAC/FSOTCDAC) resolution.
Temperature compensation combines first-order correction (via OTCDAC/FSOTCDAC) and nonlinear correction (via 176-point EEPROM lookup tables indexed every ~1.5°C). The on-chip 8-bit ADC digitizes die temperature every 1ms to drive indexing, and Secure-Lock™ prevents post-calibration EEPROM modification unless UNLOCK is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial environments with no derating up to +70°C |
| Supply Current | 2.0–2.5 mA - enables direct 2-wire loop-powered 4–20mA operation without external regulators |
| PGA Gain Range | 39–234 V/V in 16 discrete steps - accommodates sensor sensitivities from 4 mV/V to 60 mV/V |
| DAC Resolution | 16 bits - provides ±0.02% of span offset/FSO calibration accuracy |
| Step Response | 150 µs to 63% - supports real-time closed-loop control in fast-response pressure systems |
| EEPROM Size | 768 bytes (6144 bits) - stores configuration, 176-point ODAC/FSODAC tables, OTCDAC/FSOTCDAC registers, and 52-byte user space |
| Input Referred Offset TC | ≤1 µV/°C - minimizes drift-induced zero error across temperature without external compensation |
Pinout & Package
MAX1452EAE+T is housed in a 16-pin SSOP (Shrink Small Outline Package) with exposed pad not present; pin pitch is 0.65 mm and body dimensions are 5.0 mm × 6.2 mm. All pins are surface-mount compatible and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISRC | Bridge drive current mode select | Configures internal current source for resistive bridge excitation; sets bias point for piezoresistive sensors |
| 2 OUT | Main analog output | High-ESD, rail-to-rail output supporting 4–20mA, 0–5V, or ratiometric configurations; may be paralleled with DIO during calibration |
| 3 VSS | Negative supply reference | Ground return for all analog and digital circuitry; must connect to system ground with low-impedance path |
| 4 INM | Inverting bridge input | Differential input for negative side of Wheatstone bridge; polarity swappable with INP via configuration register |
| 5 BDR | Bridge drive output | Current- or voltage-mode excitation source for sensor bridge; referenced to internal 75kΩ resistor or external RISRC/RSTC |
| 6 INP | Non-inverting bridge input | Differential input for positive side of Wheatstone bridge; polarity swappable with INM via configuration register |
| 7 VDD | Positive analog/digital supply | +4.5V to +5.5V main power; requires 0.1µF bypass capacitor to VSS for noise suppression |
| 8 TEST | Internal test connection | Internally tied; must be connected to VSS for normal operation - not for user access |
| 9 VDDF | EEPROM supply | +4.5V to +5.5V dedicated supply for EEPROM; decoupled with 1µF capacitor to VSS; can be tied to VDD or isolated via 30Ω resistor |
| 10 UNLOCK | Secure-Lock override | Logic-high enables serial programming; low enables read-only operation after Secure-Lock byte is set |
| 11 DIO | Serial interface I/O | Asynchronous half-duplex communication line; auto-baud detects 4800–38400 bps; shared with OUT during calibration |
| 12 CLK1M | 1MHz clock output | Configurable gated output of internal oscillator; used for timing synchronization in host calibration systems |
| 13 AMPOUT | Uncommitted op amp output | Buffered output of internal rail-to-rail op amp; used for 4–20mA driver stage or signal conditioning |
| 14 AMP- | Op amp inverting input | High-impedance input for configuring gain, filtering, or current-sense feedback in external circuits |
| 15 AMP+ | Op amp non-inverting input | High-impedance input for configuring unity-gain buffers or differential receivers |
| 16 FSOTC | Full-span temperature coefficient output | Buffered output of FSOTC DAC; drives external compensation networks or feeds back into bridge excitation path |
Key Features
| Feature | Design Value |
|---|---|
| Fully analog signal path | Eliminates quantization noise and enables true high-resolution analog output for metrology-grade sensor systems |
| 176-point temperature-indexed lookup tables | Enables precise nonlinear compensation over -40°C to +125°C at ~1.5°C resolution without host processor intervention |
| Secure-Lock™ EEPROM protection | Hardware-enforced write-protection after calibration; factory rework enabled only via UNLOCK pin assertion |
| Single-pin DIO interface | Reduces PCB routing complexity and enables calibration and output sensing on one trace - critical for compact sensor modules |
| Integrated uncommitted op amp | Provides flexible signal conditioning for 4–20mA loop drivers, EMI filters, or ratiometric reference buffering without external components |
Applications
| Pressure Sensors | Strain Gauges |
|---|---|
Use Scenario: High-accuracy industrial pressure transducers used in hydraulic control systems with wide ambient temperature swings. IC Role / Device Role / Timing Role: Signal conditioner performing bridge excitation, PGA amplification, 16-bit offset/FSO calibration, and dual-stage (DAC + LUT) temperature compensation. Use Value: Enables ±0.02% FSO total error over -40°C to +85°C without external trim components or microcontroller intervention. | Use Scenario: Load-cell-based weighing systems requiring stable zero and span under thermal cycling in manufacturing facilities. IC Role / Device Role / Timing Role: Analog front-end providing programmable bridge drive, 150µs step response, and 176-point lookup table correction for strain gauge nonlinearity. Use Value: Reduces calibration labor by >70% versus manual potentiometer trimming; supports single-station calibration and verification. |
| Transmitters | Humidity Sensors |
Use Scenario: 2-wire, loop-powered 4–20mA field transmitters for remote tank level monitoring in oil & gas infrastructure. IC Role / Device Role / Timing Role: Low-power (2.5mA) analog processor delivering ratiometric-compatible output and integrated op amp driving 4–20mA current loop. Use Value: Eliminates need for separate voltage regulator and op amp; supports operation directly from 12–40V loop supply. | Use Scenario: Resistive humidity sensing elements in HVAC controllers where long-term stability and temperature hysteresis must be minimized. IC Role / Device Role / Timing Role: Precision conditioner applying first-order (OTCDAC/FSOTCDAC) and higher-order (LUT) compensation to resistive RH element output. Use Value: Achieves <0.25% RH error over full temperature range using only on-chip resources - no external ADC or MCU required. |
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 |
|---|---|---|---|
| MAX1455EAE+ | Same pinout, identical architecture, but rated for -40°C to +125°C and includes enhanced ESD protection (±8kV HBM) | Required for automotive under-hood or extended-temperature industrial deployments | Select MAX1455EAE+ when operating above +85°C or in high-ESD environments; otherwise MAX1452EAE+T offers cost-optimized performance at industrial grade |
| AD8555ARZ | Chopper-stabilized auto-zero amplifier with integrated DACs; 5V supply only; no EEPROM or temperature sensor | Suitable for lower-cost, lower-accuracy applications where single-point calibration suffices | Choose AD8555ARZ for simpler designs needing <0.1% FSO accuracy without multipoint temperature compensation or secure calibration storage |
Compared with MAX1455EAE+, the MAX1452EAE+T trades extended temperature rating and ESD robustness for lower unit cost and proven qualification in volume industrial instrumentation. Against AD8555ARZ, it adds autonomous temperature compensation, EEPROM-based calibration persistence, and sensor-specific features like bridge drive and FSOTC - making it a complete turnkey solution rather than a configurable building block.
Availability
MAX1452EAE+T is available at Aetrix Electronics and suitable for pressure transducers, industrial transmitters, and strain gauge instrumentation requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.
Supply support for MAX1452EAE+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 MAX1452 product line was designed specifically for precision resistive sensor signal conditioning - integrating amplification, calibration, and temperature compensation into a single analog-digital hybrid IC to replace multi-component discrete solutions in pressure, force, and environmental sensing.
FAQ
What is the operating temperature range of the MAX1452EAE+T?
The MAX1452EAE+T is specified for operation from -40°C to +85°C. This industrial-grade temperature range is validated per the device's Absolute Maximum Ratings and Electrical Characteristics tables. The MAX1452EAE+T maintains full parameter performance across this range without derating until +70°C, where power dissipation begins linear derating at 8.00 mW/°C. It is not rated for automotive AEC-Q100 or extended industrial (-40°C to +125°C) operation - those require the MAX1452AAE+ or MAX1455EAE+ variants.
Does the MAX1452EAE+T support both voltage and current bridge excitation?
Yes, the MAX1452EAE+T supports both modes. Pin ISRC configures the internal current source for constant-current bridge drive, while the BDR pin can be used with external circuitry for voltage-mode excitation. The datasheet explicitly states "Supports Both Current and Voltage Bridge Excitation" under Benefits and Features, and the functional diagram shows the current-source reference resistor (RISRC) and FSOTC resistor (RFTC) as configurable for silicon piezoresistive sensors. This dual-excitation capability allows optimization for sensor type and system noise requirements.
How does the MAX1452EAE+T implement temperature compensation without a microcontroller?
The MAX1452EAE+T performs autonomous temperature compensation using an on-chip 8-bit temperature ADC that samples every 1 ms, indexes into 176-point EEPROM lookup tables (ODAC and FSODAC), and updates the corresponding 16-bit DAC registers in real time. First-order compensation is handled by OTCDAC and FSOTCDAC DACs referenced to the bridge voltage. No host processor is needed - all logic, memory access, and DAC updating occur internally. The Secure-Lock feature ensures coefficients remain immutable after calibration unless UNLOCK is asserted.
Can the MAX1452EAE+T generate a true 4–20mA output directly?
Yes, the MAX1452EAE+T enables full 4–20mA loop-powered operation using its integrated uncommitted op amp (AMP+, AMP-, AMPOUT) and low 2.5mA supply current. Figure 4 in the datasheet shows a complete 2-wire configuration using an external NPN transistor and feedback resistors driven by AMPOUT. The op amp's rail-to-rail output swing, 2 MHz bandwidth, and 90 dB open-loop gain provide sufficient headroom and stability for precision current regulation - eliminating the need for a separate op amp or current-sense amplifier in the signal chain.
What is the purpose of the VDDF pin on the MAX1452EAE+T?
VDDF is the dedicated +4.5V to +5.5V supply for the internal EEPROM array. It must be decoupled with a 1µF capacitor to VSS. While VDDF may be tied directly to VDD for simplicity, the datasheet recommends connecting it through a 30Ω resistor to VDD to isolate EEPROM noise from the analog signal path - improving PSRR and reducing coupling into sensitive bridge inputs. This separation ensures reliable EEPROM erase/write cycles (rated for 10k cycles) without compromising analog performance during calibration or operation.
MAX1452EAE+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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
MAX1452EAE+T FAQ
1.How can I place an order for MAX1452EAE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1452EAE+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 MAX1452EAE+T reliable?
The price and inventory of MAX1452EAE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1452EAE+T is usually 5 days.
3.What payment methods are accepted for MAX1452EAE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1452EAE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1452EAE+T?
MAX1452EAE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1452EAE+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 MAX1452EAE+T?
For technical support, including MAX1452EAE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1452EAE+T requirements.
6.How does Aetrix verify that MAX1452EAE+T is sourced from the original manufacturer or authorized distributors?
All MAX1452EAE+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 MAX1452EAE+T meets industry standards.
7.What is the process for return or replacement of MAX1452EAE+T?
All MAX1452EAE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1452EAE+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 MAX1452EAE+T part is unused and in its original packaging.
Return procedure for MAX1452EAE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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