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Analog Devices Inc./Maxim Integrated MAX873AESA+T
- Part No.:
- MAX873AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX873AESA+T.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
The MAX873AESA+T from Maxim Integrated is a precision 2.5V voltage reference IC with ±0.06% initial accuracy, 7ppm/°C max temperature coefficient, and 3.8µVRMS (10Hz–1kHz) output noise-designed for high-resolution data acquisition in portable instrumentation and low-power test equipment.
For engineers reviewing the MAX873AESA+T datasheet, MAX873AESA+T pinout, MAX873AESA+T application, or MAX873AESA+T equivalent, this device delivers stable 2.5V reference performance under ±10% 5V supply, supports ±100mV trim range via external potentiometer, and integrates a temperature-proportional TEMP output for compensation circuits.
Technical Context
The MAX873AESA+T employs a laser-trimmed thin-film resistor network and proprietary curvature-correction circuitry to achieve 7ppm/°C max drift over –40°C to +85°C. Its bandgap core operates with BiCMOS process technology and includes internal short-circuit protection limiting output current to 60mA when shorted to GND.
It features a dedicated TEMP pin delivering 570mV at +25°C with 1.9mV/°C sensitivity, enabling direct die-temperature monitoring. The TRIM pin allows ±6% output adjustment using a 100kΩ potentiometer between OUT and GND, with no external components required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.06% (±1.5mV) at +25°C - ensures 12-bit ADC full-scale accuracy without calibration |
| Tempco | 7ppm/°C max - limits drift to ≤1.75mV over –40°C to +85°C ambient range |
| Noise (10Hz–1kHz) | 3.8µVRMS - supports 12-bit systems with ≥72dB SNR at 1ksps |
| Quiescent Current | 450µA max - enables >1-year battery life in 10µA sleep-cycle portable meters |
| Supply Range | +4.5V to +18V - compatible with unregulated 5V ±10% rails and higher-voltage industrial supplies |
| Load Drive | Sources 10mA / sinks 2mA - sufficient to drive SAR ADC reference inputs and op-amp buffers |
| Line Regulation | 4ppm/V max - contributes <0.01% error across full input voltage swing |
Pinout & Package
MAX873AESA+T uses an 8-pin SOIC (SO) package with 150-mil body width (S8-4), lead-free finish, and standard JEDEC MS-012 outline. Pin 1 and 8 are internally connected (I.C.), Pin 7 is no-connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 (IN) | Positive power-supply input | Accepts +4.5V to +18V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin |
| Pin 3 (TEMP) | Temperature-proportional analog output | Delivers 570mV at +25°C with 1.9mV/°C slope; unbuffered-load impedance >1MΩ recommended |
| Pin 4 (GND) | Analog ground reference | Must be star-connected to system AGND; separate from digital ground to minimize noise coupling |
| Pin 5 (TRIM) | Voltage-adjust input for output trimming | Accepts 0V to VOUT; open-circuit defaults to factory-set 2.500V; connects to pot wiper for ±100mV adjustment |
| Pin 6 (OUT) | Precision 2.5V reference output | Stable, low-noise source capable of sourcing 10mA; stable with capacitive loads up to 100µF |
Key Features
| Feature | Design Value |
|---|---|
| Trimmable output voltage | ±6% adjustment range (±100mV) using single 100kΩ potentiometer-enables field calibration without redesign |
| Integrated temperature sensor | 570mV @ +25°C, 1.9mV/°C sensitivity-provides direct die-temperature feedback for thermal compensation |
| Low-noise architecture | 3.8µVRMS (10Hz–1kHz) output noise-meets SNR requirements for 12-bit ADCs without external filtering |
| Short-circuit protection | 60mA current limit when OUT shorted to GND-prevents damage during board-level testing or fault conditions |
| Wide supply tolerance | Operates from +4.5V to +18V-supports legacy 5V ±10% rails and higher-voltage industrial supplies |
Applications
| Portable Digital Multimeters | 12-Bit Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld DMM requiring stable 2.5V reference for dual-slope ADC and auto-ranging logic. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end scaling and ADC conversion accuracy. Use Value: ±0.06% initial accuracy and 7ppm/°C tempco ensure <0.1% total measurement error across –10°C to +50°C operating range. |
Use Scenario: Battery-powered environmental sensor node digitizing thermocouple and RTD signals. IC Role / Device Role / Timing Role: Precision reference for successive-approximation ADC and analog signal conditioning. Use Value: 3.8µVRMS noise and 450µA quiescent current enable 12-bit resolution with >10-hour runtime on 2000mAh Li-ion cell. |
| Low-Power Test Equipment | Calibration Reference Modules |
|
Use Scenario: Benchtop portable calibrator generating precise DC voltage outputs for field instrument verification. IC Role / Device Role / Timing Role: Master reference for DAC-based output stage and self-test circuitry. Use Value: TRIM pin enables end-of-line gain calibration; TEMP output monitors internal thermal drift for real-time correction. |
Use Scenario: Modular calibration unit used in metrology labs to verify handheld instruments against NIST-traceable standards. IC Role / Device Role / Timing Role: Secondary reference with long-term stability (50ppm/kh) supporting periodic recalibration cycles. Use Value: Laser-trimmed resistors and curvature compensation deliver <10ppm/year aging-reducing recalibration frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025AIDR | 2.5V, 3ppm/°C max tempco, 1.2µVRMS noise, 1mA quiescent current | Higher accuracy and lower noise, but 3× higher supply current and larger SOIC-8 footprint | Select REF5025AIDR where ultra-low drift and noise outweigh battery-life constraints |
| ADR3425ARJZ-R7 | 2.5V, 10ppm/°C max tempco, 5.5µVRMS noise, 350µA quiescent current, SOT-23-5 package | Smaller footprint and lower cost, but wider tempco and higher noise than MAX873AESA+T | Select ADR3425ARJZ-R7 for space-constrained designs accepting moderate accuracy trade-offs |
Compared with REF5025AIDR and ADR3425ARJZ-R7, the MAX873AESA+T offers optimal balance of low quiescent current (450µA), tight tempco (7ppm/°C), and integrated TEMP output-making it uniquely suited for portable, battery-operated precision instruments requiring thermal awareness.
Availability
MAX873AESA+T is available at Aetrix Electronics and suitable for portable digital multimeters, 12-bit data-acquisition systems, and low-power test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX873AESA+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, communications, and consumer applications.
The MAX873AESA+T belongs to Maxim's precision voltage reference product line, engineered for applications demanding low drift, low noise, and thermal intelligence in compact, battery-efficient form factors.
FAQ
What is the maximum input voltage rating for the MAX873AESA+T?
The MAX873AESA+T has an absolute maximum IN-to-GND rating of +20V. However, functional operation is specified from +4.5V to +18V. Exceeding +18V may cause permanent damage or violate safe operating area limits, especially at elevated temperatures. Always use appropriate input filtering and transient suppression when operating near the upper limit.
Can the MAX873AESA+T drive a 10kΩ load directly?
Yes-the MAX873AESA+T sources up to 10mA and sinks up to 2mA. A 10kΩ load drawing 250µA at 2.5V falls well within its sourcing capability and introduces negligible load regulation error (≤15ppm/mA). No buffer amplifier is needed unless the application demands sub-ppm regulation or drives capacitive loads >100µF.
How does the TEMP pin on the MAX873AESA+T function in practice?
The TEMP pin on the MAX873AESA+T outputs 570mV at +25°C with a linear 1.9mV/°C slope, directly proportional to die temperature. It is unbuffered and intended for high-impedance monitoring-use ≥1MΩ input impedance on the measuring circuit. Self-heating effects are minimal below 1mW dissipation, so ambient temperature tracking remains accurate in typical PCB layouts.
Is the MAX873AESA+T RoHS-compliant and lead-free?
Yes-the "+T" suffix in MAX873AESA+T denotes a lead-free, RoHS-compliant SOIC package (S8-4 outline). It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020. The device carries Maxim's standard 10-year longevity commitment for industrial-grade products.
What is the typical turn-on time for the MAX873AESA+T?
The MAX873AESA+T typically settles to within 0.1% of its 2.5V output in 150µs with no output capacitor. With a 1µF output capacitor, turn-on time increases to ≤300µs due to RC settling. This behavior is consistent across the –40°C to +85°C operating range and supports fast wake-up sequences in battery-powered systems.
MAX873AESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 7ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8µVp-p
- Noise - 10Hz to 10kHz:
- 6.8µVrms
- Voltage - Input:
- 4.5V ~ 18V
- Current - Supply:
- 600µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX873AESA+T FAQ
1.How can I place an order for MAX873AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX873AESA+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 MAX873AESA+T reliable?
The price and inventory of MAX873AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX873AESA+T is usually 5 days.
3.What payment methods are accepted for MAX873AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX873AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX873AESA+T?
MAX873AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX873AESA+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 MAX873AESA+T?
For technical support, including MAX873AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX873AESA+T requirements.
6.How does Aetrix verify that MAX873AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX873AESA+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 MAX873AESA+T meets industry standards.
7.What is the process for return or replacement of MAX873AESA+T?
All MAX873AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX873AESA+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 MAX873AESA+T part is unused and in its original packaging.
Return procedure for MAX873AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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