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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:4,330
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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 enables stable regulation from a 3V supply.
For engineers reviewing the MAX872ESA datasheet, MAX872ESA pinout, MAX872ESA application, or MAX872ESA equivalent, key selection criteria include ultra-low IQ, tight output tolerance over extended temperature, trimmable output via TRIM pin, and compatibility with capacitive load compensation through COMP terminal.
Technical Context
The MAX872ESA implements a bandgap-based reference core with internal trimming and a dedicated TEMP output proportional to junction temperature (within ±0.5°C of ambient). Its low 10µA supply current is maintained across VIN = 2.7V to 20V and load currents up to ±500µA, enabled by a low-headroom output stage.
It supports active output trimming via external resistor divider on the TRIM pin - adjusting VOUT away from factory-trimmed value incurs a predictable tempco penalty of +7ppm/°C per 100mV deviation. The COMP pin allows stability optimization for capacitive loads >1000pF using CCOMP = CLOAD/100.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.2% at +25°C - ensures ≤±5mV absolute error for 12-bit+ ADC reference applications |
| Quiescent Current | ≤10µA - enables multi-year operation from coin-cell batteries in portable instrumentation |
| Max Dropout Voltage | 200mV at ±500µA - permits regulation from 3V supply with ≥2.7V headroom |
| Tempco | ≤40ppm/°C over -40°C to +85°C - limits output drift to ≤±1.0mV across full industrial range |
| Load Regulation | ≤0.6mV/mA - maintains stability under dynamic sensor-bias or DAC-reference loading |
| Line Regulation | ≤80µV/V - rejects input ripple without requiring external filtering in low-noise designs |
| Output Noise (0.1–10Hz) | 60µVp-p - suitable for precision 16-bit SAR and delta-sigma converter references |
Pinout & Package
MAX872ESA is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC dimensions (4.9mm × 3.9mm × 1.75mm), gull-wing leads, and GND-connected substrate.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input supply rail | Accepts 2.7V–20V; must exceed VOUT by ≥200mV for regulation; source resistance must be low to avoid start-up current limitation |
| GND (Pin 4) | Ground reference | Substrate and thermal path; connects internally to die ground; requires low-impedance PCB return |
| VOUT (Pin 6) | Precision reference output | 2.5V ±0.2%; sinks/sources ±500µA; requires ≥1000pF bypass if load >300µA |
| TRIM (Pin 5) | Output voltage adjustment node | Connects to center tap of external divider; enables ±75mV adjustment range; alters tempco by +7ppm/°C per 100mV offset |
| COMP (Pin 8) | Capacitive load compensation | Receives CCOMP = CLOAD/100 to stabilize output when total VOUT-to-GND capacitance exceeds 1000pF |
| TEMP (Pin 3) | Junction temperature monitor | Outputs ~10mV/°C (≈2.5V at 25°C); buffered high-Z output usable for thermal compensation or out-of-range detection |
| I.C. (Pins 1,7) | Internal connection | No external connection required; pins are internally tied to GND or unused circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 10µA max enables >10-year battery life in handheld multimeters and data loggers |
| Factory-trimmed 2.5V output | ±0.2% tolerance eliminates need for system-level calibration in portable test equipment |
| Low 200mV dropout | Supports direct regulation from single 3V Li-ion or alkaline cells without boost conversion |
| Integrated TEMP output | Provides accurate ambient temperature sensing (±0.5°C) for LCD contrast control or ADC gain correction |
| TRIM and COMP terminals | Enable field-adjustable output and robust stability with large capacitive loads-critical for mixed-signal SoC power domains |
Applications
| Hand-Held Instruments | Battery-Operated Equipment |
|---|---|
Use Scenario: Portable digital multimeter requiring stable 2.5V reference for 16-bit ADC front-end. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog input channel. Use Value: ±0.2% initial accuracy and 40ppm/°C drift ensure measurement repeatability across temperature without recalibration. | Use Scenario: Wireless sensor node powered by CR2032 coin cell with 10-year lifetime target. IC Role / Device Role / Timing Role: Low-power reference for microcontroller ADC and analog sensor biasing. Use Value: 10µA quiescent current minimizes standby drain, extending battery life beyond 10 years at 1-sample/hour duty cycle. |
| Power Supplies | Industrial Data Acquisition |
Use Scenario: Programmable bench power supply needing precise 2.5V feedback reference for voltage control loop. IC Role / Device Role / Timing Role: Stable reference for DAC-controlled output regulation and current-sense amplifier offset calibration. Use Value: 80µV/V line regulation ensures output accuracy remains unaffected by AC-DC converter ripple or input line variation. | Use Scenario: Modular PLC analog input module operating across -40°C to +85°C industrial environment. IC Role / Device Role / Timing Role: Primary reference for isolated 24-bit sigma-delta ADC measuring 4–20mA loop signals. Use Value: Guaranteed 40ppm/°C drift and ±5mV tolerance meet IEC 61000-6-2 immunity requirements for Class A instrumentation. |
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, ±0.2% initial accuracy, 50ppm/°C drift, 50µA IQ, SOT-23-3 package | Lacks TRIM, TEMP, and COMP pins; no output adjustability or thermal monitoring capability | Choose for space-constrained designs where trim and temp sensing are unnecessary and higher IQ is acceptable |
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C drift, 120µA IQ, SOT-23-5 package | Higher accuracy and lower drift but 12× higher quiescent current; no TEMP or TRIM functionality | Prefer for high-precision lab-grade instruments where battery life is secondary to long-term stability |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX872ESA uniquely combines ultra-low 10µA IQ, factory-trimmed 2.5V output, adjustable VOUT via TRIM, and integrated temperature monitoring - making it irreplaceable in compact, battery-powered instrumentation requiring both precision and configurability.
Availability
MAX872ESA is available at Aetrix Electronics and suitable for hand-held instruments, battery-operated equipment, and industrial power supplies requiring stable component supply and legacy design support.
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 U.S.-based 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 performance are essential.
FAQ
What is the operating temperature range of the MAX872ESA?
The MAX872ESA is specified for operation from -40°C to +85°C. Electrical characteristics including output voltage accuracy (±0.2%), temperature coefficient (≤40ppm/°C), and load regulation (≤0.6mV/mA) are guaranteed across this full industrial temperature range. This makes the MAX872ESA suitable for deployment in outdoor sensors, automotive cabin modules, and industrial controllers without derating.
Can the MAX872ESA be used with a 3V supply?
Yes, the MAX872ESA operates reliably from a 3V supply. With a maximum dropout voltage of 200mV at ±500µA load, it maintains regulation down to VIN = 2.7V - well within the typical discharge curve of a single Li-ion or two-series alkaline cells. Its 10µA quiescent current further ensures minimal impact on battery runtime in 3V-powered handheld devices.
Does the MAX872ESA require external capacitors for stability?
Yes - if the total capacitive load from VOUT to GND exceeds 300µA, a minimum 1000pF capacitor must be placed directly at the VOUT pin. For loads >300µA or total CLOAD >1000pF, a compensation capacitor CCOMP = CLOAD/100 must be connected between COMP and VOUT to maintain phase margin and prevent oscillation. These requirements are explicitly defined in the MAX872ESA datasheet Figure 2 and Applications Information section.
What is the function of the TEMP pin on the MAX872ESA?
TEMP (Pin 3) outputs a voltage proportional to the die junction temperature (~10mV/°C, ≈2.5V at 25°C), accurate to within ±0.5°C of ambient due to <100µW internal dissipation. It serves as a calibrated ambient temperature sensor for applications like LCD contrast control, ADC gain compensation, or thermal out-of-range detection - eliminating the need for a separate thermistor or digital sensor in space-constrained designs using the MAX872ESA.
Is the MAX872ESA still recommended for new designs?
No - Maxim explicitly states "Not Recommended for New Designs" due to discontinuation of the legacy wafer process. However, the MAX872ESA remains fully supported for existing designs with documented specifications, available inventory, and technical documentation. Aetrix Electronics provides continuity sourcing and lifecycle coordination for legacy programs relying on the MAX872ESA, including full traceability and obsolescence mitigation planning.
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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