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Analog Devices Inc./Maxim Integrated MAX873BESA+T
- Part No.:
- MAX873BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX873BESA+T.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
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Product details
Overview
MAX873BESA+T from Maxim Integrated is a precision 2.5V voltage reference IC with ±0.10% initial accuracy, 20ppm/°C max temperature coefficient, and 450µA max quiescent current, designed for stable biasing in 12-bit data-acquisition systems powered from +5V ±10% supplies.
For engineers reviewing the MAX873BESA+T datasheet, MAX873BESA+T pinout, MAX873BESA+T application, or MAX873BESA+T equivalent, this page delivers verified electrical specs, SO-8 package layout, TRIM/TEMP terminal functions, and real-world selection guidance for high-stability analog signal chains.
Technical Context
The MAX873BESA+T uses a proprietary curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve low drift and high initial accuracy. Its internal architecture supports both sourcing (10mA) and sinking (2mA) load currents while maintaining regulation across input voltages from +4.5V to +18V.
It integrates a dedicated TEMP pin delivering 570mV at +25°C with 1.9mV/°C sensitivity for external temperature compensation or monitoring, and a TRIM pin enabling ±6% output adjustment via a 100kΩ potentiometer-without requiring external op-amps or feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.10% (±2.5mV) at +25°C - ensures 12-bit ADC full-scale error remains <0.5 LSB over temperature |
| Tempco | 20ppm/°C max - limits output drift to ≤±0.5mV over −40°C to +85°C operating range |
| Noise (10Hz–1kHz) | 6.8µVRMS - compatible with 12-bit systems requiring <1LSB noise floor (≈1.22mV for 2.5V FS) |
| Quiescent Current | 450µA max - enables battery-powered multimeters and portable DAQ with >1-year runtime on coin cells |
| Line Regulation | 4ppm/V max - maintains output stability despite ±10% supply variation in +5V rail systems |
| Load Regulation | 15ppm/mA max - holds accuracy under dynamic loads up to 10mA source / 2mA sink |
| TRIM Range | ±100mV (±4%) - allows fine-tuning to compensate for PCB trace resistance or system-level gain errors |
Pinout & Package
MAX873BESA+T is housed in an 8-pin SOIC (SO-8, package code S8-4), 3.9mm × 4.9mm body, 1.27mm pitch, lead-free (RoHS-compliant) package rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | I.C. | Internally connected - must remain unconnected on PCB; no external routing allowed |
| 2 | IN | Positive power input - accepts +4.5V to +18V; requires 0.1µF ceramic bypass capacitor near pin |
| 3 | TEMP | Temperature-proportional analog output - 570mV at +25°C, 1.9mV/°C slope; used for compensation or thermal warning |
| 4 | GND | Analog ground reference - common return for IN, OUT, TRIM, and TEMP; must be low-impedance plane |
| 5 | TRIM | Voltage-adjust input - connects to center tap of 100kΩ pot between OUT and GND for ±6% output tuning |
| 6 | OUT | Precision 2.5V reference output - sources up to 10mA or sinks up to 2mA; stable with 0–100µF capacitive loads |
| 7 | N.C. | No connection - not bonded internally; leave floating; no PCB pad or trace required |
Key Features
| Feature | Design Value |
|---|---|
| Low-drift curvature correction | 20ppm/°C max tempco achieved without external components - eliminates need for discrete compensation networks |
| Integrated TEMP output | 570mV @ +25°C with 1.9mV/°C linearity - provides direct die-temperature sensing for calibration or fault detection |
| Trimmable output | ±6% adjustment range using only a single 100kΩ pot - enables field calibration without redesigning reference divider |
| Wide supply range | +4.5V to +18V operation - supports direct use from unregulated 5V, 12V, or 15V rails without LDO pre-regulation |
| Short-circuit protection | 60mA current limit when OUT shorted to GND - prevents damage during test or assembly faults |
Applications
| Portable Digital Multimeters | 12-Bit Data-Acquisition Systems |
|---|---|
|
Use Scenario: Handheld DMMs requiring stable 2.5V reference for autoranging ADCs and LCD driver biasing across battery discharge cycles. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and display controller - sets absolute measurement accuracy and scale linearity. Use Value: 20ppm/°C drift and 450µA IQ enable >4½-digit accuracy over −10°C to +50°C ambient, extending usable battery life beyond 18 months. |
Use Scenario: Industrial sensor nodes digitizing thermocouple, RTD, or strain-gauge signals with 12-bit resolution and minimal board space. IC Role / Device Role / Timing Role: Precision reference for successive-approximation ADC - defines full-scale voltage and determines LSB size (610µV). Use Value: 6.8µVRMS (10Hz–1kHz) noise and ±0.10% initial accuracy ensure <0.5 LSB total error without post-calibration. |
| Low-Power Test Equipment | Calibration Reference Subsystems |
|
Use Scenario: Benchtop calibrators and portable signal generators needing stable, low-noise references for DAC output scaling and self-test routines. IC Role / Device Role / Timing Role: Master reference for 12-bit multiplying DACs and internal ADCs used in closed-loop calibration loops. Use Value: TRIM pin enables factory-set offset correction to ±0.05% after PCB assembly, eliminating manual trim pots and reducing test time by 30%. |
Use Scenario: Modular calibration modules in automated test equipment (ATE), where long-term stability and temperature tracking are critical. IC Role / Device Role / Timing Role: Secondary reference in multi-tier reference hierarchy - tracks primary oven-controlled reference via TEMP pin feedback. Use Value: 50ppm/kh long-term drift and matched TEMP output allow predictive aging compensation, extending recalibration intervals to 2 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02CP | 2.5V output, ±0.2% initial accuracy, 50ppm/°C tempco, 1.2mA IQ - higher drift and power than MAX873BESA+T | Suitable for cost-sensitive 10-bit systems where ±0.2% accuracy suffices; not recommended for 12-bit DAQ | Select REF02CP only if budget constraints outweigh stability requirements and board space allows larger decoupling. |
| ADR3425ARJZ-R7 | 2.5V output, ±0.12% initial accuracy, 10ppm/°C tempco, 3.5µA IQ - lower drift but 7× lower supply current; no TEMP or TRIM pins | Better for ultra-low-power IoT sensors; lacks onboard temperature sensing and adjustability needed for calibration subsystems | Choose ADR3425ARJZ-R7 for battery lifetime-critical designs without trimming or thermal compensation needs. |
Compared with REF02CP, MAX873BESA+T offers tighter initial accuracy and half the tempco at comparable cost; versus ADR3425ARJZ-R7, it trades ultra-low IQ for integrated TRIM/TEMP functionality essential in field-calibratable instruments.
Availability
MAX873BESA+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 continuity.
Supply support for MAX873BESA+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 MAX873 series belongs to Maxim's precision voltage reference product line, engineered specifically for high-accuracy, low-drift, low-power applications in portable instrumentation and data-conversion systems.
FAQ
What is the maximum input voltage for MAX873BESA+T?
The MAX873BESA+T supports a maximum input voltage of +18V, with guaranteed operation down to +4.5V. This wide supply range allows direct use from standard 5V, 12V, or 15V rails without pre-regulation. Absolute maximum rating is +20V on the IN pin relative to GND, but sustained operation above +18V may impact reliability or parametric performance.
Does MAX873BESA+T require an output capacitor for stability?
No, the MAX873BESA+T is inherently stable without an output capacitor and remains stable with capacitive loads up to 100µF. Unlike many references, it does not oscillate or exhibit peaking with zero or large output capacitance. A 1µF ceramic capacitor may be added to improve transient response when driving dynamic loads, but it is never mandatory for stability.
How do I adjust the output voltage of MAX873BESA+T using the TRIM pin?
To adjust the MAX873BESA+T output, connect a 100kΩ potentiometer between OUT (pin 6) and GND (pin 4), then tie the wiper to TRIM (pin 5). With this configuration, the output voltage changes by ±100mV (±4%) as the wiper moves from GND to OUT. Avoid loading the TRIM pin with external circuitry - its input impedance is high, and loading degrades adjustment linearity.
What is the function of the TEMP pin on MAX873BESA+T?
The TEMP pin (pin 3) on MAX873BESA+T outputs a voltage proportional to die temperature: 570mV at +25°C with a slope of 1.9mV/°C. It is intended for temperature compensation circuits (e.g., correcting sensor offset drift) or thermal warning functions. The pin must be unloaded for accurate readings; adding even 100kΩ load introduces measurable error due to internal output impedance.
Can MAX873BESA+T drive a 10kΩ load directly?
Yes, MAX873BESA+T can drive a 10kΩ load directly. At 2.5V output, a 10kΩ load draws only 0.25mA - well within its 10mA sourcing capability. Load regulation is specified at 15ppm/mA, so the resulting output shift is just 3.75ppm (≈94nV), negligible for 12-bit systems. No buffer amplifier is required for such light loads.
MAX873BESA+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:
- ±0.1%
- Temperature Coefficient:
- 20ppm/°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
MAX873BESA+T FAQ
1.How can I place an order for MAX873BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX873BESA+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 MAX873BESA+T reliable?
The price and inventory of MAX873BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX873BESA+T is usually 5 days.
3.What payment methods are accepted for MAX873BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX873BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX873BESA+T?
MAX873BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX873BESA+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 MAX873BESA+T?
For technical support, including MAX873BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX873BESA+T requirements.
6.How does Aetrix verify that MAX873BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX873BESA+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 MAX873BESA+T meets industry standards.
7.What is the process for return or replacement of MAX873BESA+T?
All MAX873BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX873BESA+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 MAX873BESA+T part is unused and in its original packaging.
Return procedure for MAX873BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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