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Analog Devices Inc./Maxim Integrated MAX872ESA+
- Part No.:
- MAX872ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX872ESA+.pdf
- Description:
- IC VREF SERIES 0.48% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
MAX872ESA+ from Maxim Integrated is a precision 2.5V low-dropout voltage reference IC designed for high-accuracy analog signal conditioning and ADC/DAC biasing in battery-powered systems. It delivers ±0.2% initial accuracy (±5mV), 40ppm/°C max temperature drift, and operates with only 10µA quiescent current across -40°C to +85°C. Its 200mV dropout at 500µA load enables reliable operation from a 3V supply in handheld instruments and portable power supplies.
For engineers reviewing the MAX872ESA+ datasheet, MAX872ESA+ pinout, MAX872ESA+ application, or MAX872ESA+ equivalent, key selection considerations include ultra-low IQ, trimmable output via TRIM pin, TEMP output for ambient sensing, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX872ESA+ implements a bandgap-based reference core with internal trimming and a dedicated TEMP output proportional to junction temperature (≈ambient within ±0.5°C). Its architecture supports both sourcing and sinking up to ±500µA while maintaining regulation under 200mV input headroom.
It features a COMP pin for capacitive load compensation-required when CLOAD > 1000pF-and a TRIM pin enabling ±75mV adjustment range with predictable tempco degradation (7ppm/°C per 100mV offset). Line regulation is specified at 20µV/V and load regulation at 0.6mV/mA over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.2% (±5mV) at +25°C - ensures direct compatibility with 2.5V ADC references and rail-to-rail op-amp biasing |
| Quiescent Current | ≤10µA - enables multi-year battery life in always-on sensor nodes and portable meters |
| Max Dropout Voltage | 200mV at ±500µA load - allows stable regulation from 3V supply with ≥100mV margin |
| Tempco | ≤40ppm/°C over -40°C to +85°C - limits full-range error to ≤±3.2mV, suitable for 12-bit precision systems |
| Line Regulation | 20µV/V - contributes <0.5mV error over 2.7V–20V input range, critical for unregulated battery inputs |
| Load Regulation | 0.6mV/mA - maintains output stability across dynamic loads typical in microcontroller ADC sampling bursts |
| TEMP Output | Proportional to junction temperature (≈ambient); buffered high-Z output usable for thermal monitoring or gain compensation |
Pinout & Package
MAX872ESA+ is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch and gull-wing leads. The package is RoHS-compliant and rated for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input voltage supply | Accepts 2.7V to 20V; must exceed VOUT by ≥200mV for regulation; high-impedance input minimizes source resistance sensitivity |
| GND (Pins 1, 4) | Ground reference | Dual ground pins reduce ground bounce; substrate tied to GND per die topography |
| VOUT (Pin 6) | Precision reference output | 2.5V ±0.2% output; capable of sourcing/sinking ±500µA; requires ≥1000pF bypass if load >300µA |
| TRIM (Pin 5) | Output voltage adjustment | Connects to center tap of external potentiometer; enables ±75mV trim range with known tempco penalty |
| COMP (Pin 8) | Capacitive load compensation | Must connect CLOAD/100 capacitor from VOUT to COMP when total CLOAD >1000pF to ensure stability |
| TEMP (Pin 3) | Temperature-proportional output | Provides ~10mV/°C output; requires high-Z buffer (e.g., op-amp follower) before ADC input |
| I.C. (Pins 7, 1) | Internal connection (no bond wire) | No external connection required; floating internal node per Maxim die layout |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 10µA supply current | Enables decade-scale operation on coin-cell batteries without compromising reference stability |
| 200mV dropout at 500µA | Permits use with single 3V Li-ion or two-cell alkaline supplies while retaining regulation margin |
| Integrated TEMP output | Eliminates need for external temperature sensor in thermal-aware power management or LCD contrast control |
| TRIM pin with ±75mV range | Allows field calibration or system-level offset correction without replacing the reference IC |
| SO-8 industrial-grade packaging | Supports automated assembly and meets IPC/JEDEC moisture sensitivity level MSL-1 |
Applications
| Hand-Held Multimeters | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Portable 4½-digit DMM requiring stable 2.5V reference for dual-slope ADC integration. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end and ADC conversion reference. Use Value: ±5mV initial accuracy and 40ppm/°C drift ensure <0.02% full-scale error across operating temperature, meeting Class II meter specifications. |
Use Scenario: Low-power environmental sensor node logging temperature/humidity every 10 seconds using a 3V coin cell. IC Role / Device Role / Timing Role: Reference source for SAR ADC and bias for low-noise signal conditioning op-amps. Use Value: 10µA quiescent current extends battery life beyond 5 years; TEMP output enables on-chip thermal calibration of sensor readings. |
| Programmable Power Supplies | Industrial Process Transmitters |
|
Use Scenario: Benchtop power supply with digitally adjustable 0–30V output and 12-bit DAC-controlled setpoint. IC Role / Device Role / Timing Role: Precision reference for DAC voltage scaling and feedback loop reference. Use Value: 20µV/V line regulation prevents output drift during AC input fluctuations; TRIM pin allows factory calibration against master standard. |
Use Scenario: 4–20mA loop-powered transmitter measuring pressure in oil-field instrumentation. IC Role / Device Role / Timing Role: Stable reference for sensor excitation and ADC conversion in harsh industrial environments. Use Value: -40°C to +85°C rating and 0.6mV/mA load regulation ensure consistent 16-bit measurement integrity despite loop current variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V, 50ppm/°C max drift, 50µA IQ, SOT-23-3 package - higher quiescent current, no TEMP or TRIM pins | Lacks integrated temperature sensing and output trimming; suited for cost-sensitive, space-constrained designs where ultra-low IQ is secondary | Select REF3025AIDBZR when board area is critical and thermal monitoring is handled externally |
| ADR3425ARJZ-R7 | 2.5V, 10ppm/°C max drift, 120µA IQ, SOT-23-5 package - superior tempco but 12× higher IQ, no TEMP output | Higher precision at expense of battery runtime; no built-in temperature monitoring capability | Choose ADR3425ARJZ-R7 for lab-grade instrumentation where long-term stability outweighs power budget |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX872ESA+ uniquely combines ultra-low 10µA current, integrated TEMP sensing, and TRIM adjustability in an SO-8 package-making it irreplaceable for battery-operated systems requiring both precision and embedded thermal awareness without added components.
Availability
MAX872ESA+ is available at Aetrix Electronics and suitable for hand-held instruments, battery-powered data loggers, and programmable power supplies requiring stable component supply amid legacy product support constraints.
Supply support for MAX872ESA+ 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 MAX872ESA+ belongs to Maxim's precision voltage reference product line, engineered specifically for ultra-low-power, high-accuracy applications in portable and battery-critical systems where minimal dropout and extended temperature stability are mandatory.
FAQ
Is MAX872ESA+ recommended for new designs?
No, MAX872ESA+ is Not Recommended for New Designs per Maxim's official documentation. It was manufactured using a discontinued wafer process, and Maxim advises selecting a replacement or second-source alternative. However, Aetrix Electronics continues to support existing designs with verified stock and traceable sourcing for MAX872ESA+ in industrial and legacy-repair contexts.
What is the function of the TEMP pin on MAX872ESA+?
The TEMP pin on MAX872ESA+ provides a voltage proportional to the device's junction temperature (~10mV/°C), which closely tracks ambient temperature due to sub-100µW power dissipation. It is intended for thermal monitoring, LCD contrast control, or ADC gain compensation-but must be buffered with a high-impedance amplifier before connection to an ADC input.
Can MAX872ESA+ operate from a 3V supply?
Yes, MAX872ESA+ can operate from a 3V supply. With a 2.5V output and 200mV dropout requirement, it needs only 2.7V minimum input-well within a 3V system margin. Its guaranteed operation down to 2.7V and ultra-low 10µA quiescent current make MAX872ESA+ ideal for single-cell lithium or two-cell alkaline battery applications.
Does MAX872ESA+ support output voltage trimming?
Yes, MAX872ESA+ supports output voltage trimming via its dedicated TRIM pin (Pin 5). Connecting a potentiometer between VIN and GND-with the wiper to TRIM-allows adjustment of VOUT over a ±75mV range. Note that each 100mV deviation from nominal increases tempco by ~7ppm/°C, as documented in the MAX872ESA+ applications information.
What package type is used for MAX872ESA+?
MAX872ESA+ uses an 8-pin SO (Small Outline) surface-mount package with 1.27mm lead pitch, compliant with JEDEC MS-012. It is rated for the industrial temperature range (-40°C to +85°C) and carries the "ESA" suffix per Maxim's ordering nomenclature, distinguishing it from the plastic DIP (EPA) and commercial-grade (CSA/C/D) variants.
MAX872ESA+ 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:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 300 µA
- Tolerance:
- ±0.48%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 60µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.7V ~ 20V
- Current - Supply:
- 15µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX872ESA+ FAQ
1.How can I place an order for MAX872ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX872ESA+ 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 MAX872ESA+ reliable?
The price and inventory of MAX872ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX872ESA+ is usually 5 days.
3.What payment methods are accepted for MAX872ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX872ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX872ESA+?
MAX872ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX872ESA+ 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 MAX872ESA+?
For technical support, including MAX872ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX872ESA+ requirements.
6.How does Aetrix verify that MAX872ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX872ESA+ 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 MAX872ESA+ meets industry standards.
7.What is the process for return or replacement of MAX872ESA+?
All MAX872ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX872ESA+, 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 MAX872ESA+ part is unused and in its original packaging.
Return procedure for MAX872ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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