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Analog Devices Inc./Maxim Integrated MAX876BESA+
- Part No.:
- MAX876BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX876BESA+.pdf
- Description:
- IC VREF SERIES 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:874
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Product details
Overview
The MAX876BESA+ from Maxim Integrated is a precision +10V voltage reference IC with ±0.05% initial accuracy, 20ppm/°C max temperature coefficient, and 29µVRMS (10Hz–1kHz) output noise-designed for high-resolution 12-bit data-acquisition systems requiring stable, low-drift excitation or ADC/DAC reference in portable test equipment and digital multimeters.
For engineers reviewing the MAX876BESA+ datasheet, MAX876BESA+ pinout, MAX876BESA+ application, or MAX876BESA+ equivalent, key selection considerations include its 10V output tolerance, TRIM-adjustable range (±600mV), TEMP pin for die-temperature monitoring, 320–700µA quiescent current, and SO-8 package compatibility with space-constrained industrial sensor interfaces.
Technical Context
The MAX876BESA+ employs a laser-trimmed thin-film resistor network and proprietary curvature-correction circuitry to achieve low thermal drift across –40°C to +85°C. Its bandgap core delivers stable 10.000V output with <6ppm/V line regulation and <20ppm/mA load regulation under sourcing conditions.
It integrates a dedicated TEMP pin providing 630mV at +25°C with 2.1mV/°C sensitivity-enabling direct die-temperature sensing without external components-and supports output trimming via external potentiometer between OUT, TRIM, and GND for ±6% adjustment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000V nominal, ±0.05% initial accuracy (9.995V to 10.005V at +25°C)-ensures ≤0.5mV absolute error in 12-bit 10V full-scale systems. |
| Tempco | 20ppm/°C max over –40°C to +85°C-limits drift to ≤200µV over 10°C ambient change, critical for metrology-grade stability. |
| Noise (10Hz–1kHz) | 29µVRMS typical-meets SNR requirements for 12-bit ADCs (≥70dB) without additional filtering. |
| Quiescent Current | 320–700µA over temperature-enables >10-year battery life in portable DMMs drawing <1mA total system current. |
| Load Drive | Sources 10mA / sinks 2mA-supports direct driving of SAR ADC reference inputs and small-signal op-amp bias networks. |
| TRIM Range | ±600mV (±6%) via external potentiometer-allows field calibration to compensate for PCB trace resistance or system gain errors. |
| TEMP Output | 630mV at +25°C, 2.1mV/°C sensitivity-provides calibrated die-temperature signal for thermal compensation or overtemperature warning. |
Pinout & Package
MAX876BESA+ uses an 8-pin SOIC (SO-8, package code S8-4), 150-mil body width, with exposed pad not present. Pins 1 and 8 are internally connected (do not route); Pin 7 is no-connect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2: IN | Positive power-supply input | Accepts +12V to +18V supply; internal LDO regulates to reference core-no external regulator needed. |
| Pin 3: TEMP | Digital die-temperature proportional output | Provides 630mV @ +25°C, 2.1mV/°C slope; requires high-impedance ADC input to avoid loading error. |
| Pin 4: GND | Analog ground reference | Must be star-connected to system AGND; separates reference core from noisy digital return paths. |
| Pin 5: TRIM | Voltage-adjust input | Connects to center tap of 100kΩ pot between OUT and GND; enables ±6% output fine-tuning without recalibration. |
| Pin 6: OUT | Precision 10V reference output | Low-impedance buffered source; stable with 0–100µF capacitive loads-no phase-margin risk in feedback loops. |
Key Features
| Feature | Design Value |
|---|---|
| Trim-adjustable output | ±600mV range using single 100kΩ potentiometer-eliminates need for custom laser trimming in volume production. |
| Dual-direction load capability | Sinks 2mA while maintaining regulation-enables active pull-down in ratiometric sensor bridges or current-source references. |
| Integrated temperature monitor | Calibrated 2.1mV/°C TEMP output-replaces discrete thermistor + amplifier in thermal compensation circuits. |
| Ultra-low noise architecture | 29µVRMS (10Hz–1kHz) at 10V-avoids post-regulation filtering in high-SNR data acquisition front-ends. |
| Wide supply range | +12V to +18V operation-supports direct connection to unregulated 12V rails in industrial PLC I/O modules. |
Applications
| Portable Digital Multimeter | 12-Bit Industrial Data Logger |
|---|---|
|
Use Scenario: Handheld DMM measuring DC voltage up to 1000V with 0.1% basic accuracy and auto-ranging. IC Role / Device Role / Timing Role: Primary 10V reference for dual-slope ADC integrator and DAC-based range scaling. Use Value: ±0.05% initial accuracy and 20ppm/°C tempco ensure calibration holds across 0–40°C operating range without warm-up delay. |
Use Scenario: Battery-powered environmental sensor node logging temperature, pressure, and humidity at 10Hz sample rate. IC Role / Device Role / Timing Role: Stable 10V excitation source for bridge sensors and reference for 12-bit SAR ADC. Use Value: 320µA quiescent current extends 2xAA battery life beyond 2 years; TEMP pin enables on-chip thermal derating of sensor gain. |
| Low-Power Test Equipment | Calibration Reference Module |
|
Use Scenario: Benchtop handheld calibrator generating precise 10V, 5V, and 2.5V outputs for field verification of process transmitters. IC Role / Device Role / Timing Role: Fixed 10V reference in programmable voltage source stage with relay-switched output ranges. Use Value: TRIM pin allows factory calibration to ±0.01% after assembly; 29µV RMS noise prevents measurement uncertainty in µV-level null detection. |
Use Scenario: Rack-mounted calibration standard used to verify bench DMMs and oscilloscope vertical gain accuracy. IC Role / Device Role / Timing Role: Primary 10V reference in oven-controlled analog subsystem with long-term drift monitoring. Use Value: 50ppm/kh long-term stability ensures ≤10ppm drift over 2000-hour qualification tests; SO-8 package enables hermetic sealing in controlled-environment enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5010IDR | 10V output, 3ppm/°C max tempco, 12µVRMS noise, 1mA IQ, SO-8 | Lower drift/noise but 3× higher supply current; requires external decoupling for stability | Select REF5010IDR when ultra-low drift (<5ppm/°C) is mandatory and board space allows larger bypass caps. |
| ADR445BRZ | 10V output, 3ppm/°C max tempco, 1.8µVRMS noise, 750µA IQ, SO-8 | Superior noise performance but no TEMP pin or TRIM function; higher cost | Choose ADR445BRZ for metrology-grade 16-bit+ systems where temperature monitoring is handled separately. |
Compared with REF5010IDR and ADR445BRZ, the MAX876BESA+ trades ultra-low drift for integrated diagnostics (TEMP) and field adjustability (TRIM), making it optimal for cost-sensitive, space-constrained portable instruments where ±0.05% accuracy and thermal awareness outweigh sub-ppm stability needs.
Availability
MAX876BESA+ is available at Aetrix Electronics and suitable for portable digital multimeters, 12-bit industrial data loggers, and low-power test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX876BESA+ 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) designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low-power, high-accuracy performance.
The MAX873/MAX875/MAX876 family was engineered specifically for portable and battery-operated instrumentation requiring stable, trimmable voltage references with integrated temperature sensing-addressing calibration, thermal compensation, and size constraints in handheld test gear.
FAQ
What is the maximum input voltage rating for the MAX876BESA+?
The MAX876BESA+ has an absolute maximum IN-to-GND rating of +20V. Operation is specified over +12V to +18V supply range per the datasheet's ELECTRICAL CHARACTERISTICS-MAX876 table. Exceeding +20V risks permanent damage; sustained operation above +18V voids parametric guarantees and may accelerate long-term drift.
Can the MAX876BESA+ drive a 10µF output capacitor without instability?
Yes-the MAX876BESA+ is explicitly characterized as stable with capacitive loads up to 100µF. The datasheet states "do not require an output capacitor for stability" and confirms robust transient response even with 1µF loads (see toc29–toc34). A 10µF ceramic or tantalum capacitor improves load-step immunity without risk of oscillation.
How does the TEMP pin on the MAX876BESA+ relate to ambient temperature?
The TEMP pin voltage reflects die temperature-not ambient-with 630mV at +25°C and 2.1mV/°C sensitivity. Self-heating causes TJ > TA; for example, at 500mW dissipation in SO-8, junction rise may add ~25°C. To estimate TA, measure TEMP voltage, compute TJ = (VTEMP − 630mV)/2.1mV/°C + 298.15K, then subtract self-heating delta.
What is the purpose of the TRIM pin on the MAX876BESA+, and how is it used?
The TRIM pin enables ±6% adjustment of the 10V output using a resistive divider between OUT and GND. With a 100kΩ potentiometer wiper connected to TRIM, adjusting the wiper changes VOUT linearly: ∆VOUT = 2 × (VTRIM − 5.0V) × 0.06. This allows field calibration to correct for PCB layout tolerances or system-level gain errors without replacing the MAX876BESA+.
Does the MAX876BESA+ support sinking current, and what is its maximum sink capability?
Yes-the MAX876BESA+ sinks up to 2mA while maintaining output regulation within spec. Load regulation is characterized at IL = 0 to –1mA (sink), with max 1900ppm/mA drift. Short-circuit protection limits sink current to 60mA if OUT is pulled to GND, but continuous operation above 2mA violates the guaranteed regulation spec and may cause excessive heating in SO-8 package.
MAX876BESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 18µVp-p
- Noise - 10Hz to 10kHz:
- 29µVrms
- Voltage - Input:
- 12V ~ 18V
- Current - Supply:
- 700µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX876BESA+ FAQ
1.How can I place an order for MAX876BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX876BESA+ 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 MAX876BESA+ reliable?
The price and inventory of MAX876BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX876BESA+ is usually 5 days.
3.What payment methods are accepted for MAX876BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX876BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX876BESA+?
MAX876BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX876BESA+ 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 MAX876BESA+?
For technical support, including MAX876BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX876BESA+ requirements.
6.How does Aetrix verify that MAX876BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX876BESA+ 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 MAX876BESA+ meets industry standards.
7.What is the process for return or replacement of MAX876BESA+?
All MAX876BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX876BESA+, 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 MAX876BESA+ part is unused and in its original packaging.
Return procedure for MAX876BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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