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Analog Devices Inc./Maxim Integrated MAX874EPA
- Part No.:
- MAX874EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX874EPA.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,041
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Product details
Overview
MAX874EPA from Maxim Integrated is a precision 4.096V low-dropout voltage reference IC designed for high-accuracy analog signal conditioning and ADC/DAC biasing in battery-powered and industrial systems. It delivers ±0.2% initial accuracy (±8mV), 40ppm/°C max temperature drift, and operates with only 10µA quiescent current from 4.3V to 20V supply - enabling use with standard 5V rails while maintaining 200mV dropout. It supports ±500µA sink/source and features a dedicated TEMP output for ambient temperature monitoring.
For engineers reviewing the MAX874EPA datasheet, MAX874EPA pinout, MAX874EPA application, or MAX874EPA equivalent, key selection criteria include its 4.096V nominal output, -40°C to +85°C extended temperature grade, 8-pin plastic DIP package, and compatibility with precision data acquisition, portable instrumentation, and low-power power-supply feedback loops.
Technical Context
The MAX874EPA implements a bandgap-based reference core with internal trimming for 4.096V output, integrated TEMP sensor output (voltage proportional to junction temperature), and TRIM terminal for fine adjustment of VOUT. Its ultra-low 10µA supply current and 200mV dropout enable operation directly from 5V supplies with minimal headroom.
It features dual regulation paths: load regulation ≤1.0mV/mA and line regulation ≤75µV/V over temperature, with PSRR >60dB below 100Hz. The COMP pin enables stability compensation for capacitive loads >1000pF, and the TEMP output provides ±2.3mV/°C sensitivity for system-level thermal monitoring without external sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.2% (±8mV) at +25°C - ensures 12-bit DAC/ADC full-scale accuracy without calibration |
| Tempco | ≤40ppm/°C over -40°C to +85°C - maintains <±0.5 LSB drift across industrial temperature range |
| Quiescent Current | ≤10µA - enables multi-year battery life in handheld meters and remote sensors |
| Dropout Voltage | 200mV at ±500µA load - allows direct operation from 5V rail with margin for aging and tolerance |
| Line Regulation | ≤75µV/V - rejects input ripple and supply variation in unregulated or noisy power domains |
| Load Regulation | ≤1.0mV/mA - sustains stable reference under dynamic load changes in multiplexed analog front-ends |
| TEMP Output | Proportional to junction temp (±2.3mV/°C) - provides calibrated ambient sensing with <0.5°C error vs. ambient |
Pinout & Package
MAX874EPA is housed in an 8-pin plastic DIP (dual in-line package) with 0.300" wide body and 0.100" pin pitch, suitable for through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input Supply | Accepts 4.3V–20V; minimum 200mV above VOUT for regulation |
| GND (Pin 4) | Ground Reference | Common return for VOUT, TEMP, TRIM, and COMP; substrate tied to GND |
| TEMP (Pin 3) | Temperature Sensor Output | Provides voltage proportional to die temperature (≈2.5V at 25°C); requires high-Z buffer |
| TRIM (Pin 5) | Output Adjustment Input | Allows ±150mV trimming of VOUT; alters tempco by ~7ppm/°C per 100mV offset |
| COMP (Pin 8) | Capacitive Load Compensation | Connect CLOAD/100 capacitor to VOUT when total load capacitance exceeds 1000pF |
| VOUT (Pin 6) | Precision Reference Output | Delivers regulated 4.096V ±0.2%; sources/sinks up to ±500µA |
| I.C. (Pins 1 & 7) | Internal Connection (No Connect) | Internally bonded; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| 4.096V Output with Trim | Factory-trimmed for 12-bit system compatibility; TRIM pin enables field calibration to match system gain |
| Integrated TEMP Output | Eliminates need for external temperature sensor in thermal compensation circuits (e.g., LCD contrast, ADC gain) |
| Ultra-Low 10µA Quiescent Current | Reduces standby power in always-on measurement nodes - critical for coin-cell or energy-harvesting designs |
| 200mV Dropout at Full Load | Enables direct use with 5V supplies while preserving margin for voltage drop across PCB traces and connectors |
| Stable with Capacitive Loads | COMP pin allows robust operation into >1nF loads - supports filtering and noise reduction without oscillation |
Applications
| Portable Multimeters | Industrial Data Loggers |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 4.096V reference for 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and autoranging circuitry. Use Value: ±0.2% initial accuracy and 40ppm/°C drift ensure measurement repeatability across battery discharge and ambient temperature shifts. |
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure over months. IC Role / Device Role / Timing Role: Reference source for analog front-end and TEMP output used for on-board thermal calibration. Use Value: 10µA quiescent current extends battery life; integrated TEMP output replaces discrete sensor, reducing BOM count and layout area. |
| Programmable Power Supplies | Medical Patient Monitors |
Use Scenario: Bench power supply with programmable 0–30V output using DAC-controlled feedback loop. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and output voltage sense amplifier. Use Value: Low line/load regulation (≤75µV/V, ≤1.0mV/mA) ensures output accuracy remains stable despite AC line fluctuations and load transients. |
Use Scenario: Portable ECG module requiring stable reference for analog signal chain and patient temperature estimation. IC Role / Device Role / Timing Role: Dual-role device: VOUT sets ADC full-scale; TEMP output estimates skin-contact temperature. Use Value: Single-component solution reduces risk of calibration mismatch between reference and thermal sensing elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096V, 3ppm/°C max drift, 95µA IQ, SO-8 package | Lower drift but 10× higher supply current; no TEMP output | Preferred where long-term stability outweighs battery life; requires redesign for SO-8 footprint |
| ADR444BRZ | 4.096V, 3ppm/°C drift, 750µA IQ, SO-8 package | Higher precision and PSRR, but incompatible quiescent current and no TEMP output | Suitable for mains-powered lab equipment; not viable for battery-operated systems |
Compared with REF5040IDR and ADR444BRZ, the MAX874EPA uniquely combines ultra-low 10µA supply current, integrated TEMP output, and DIP packaging - making it irreplaceable in legacy, low-power, thermally aware embedded designs where modern alternatives require layout or power architecture changes.
Availability
MAX874EPA is available at Aetrix Electronics and suitable for portable instrumentation, battery-operated test equipment, and industrial data loggers requiring stable component supply and long-lifecycle support.
Supply support for MAX874EPA 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 MAX872/MAX874 family was engineered for ultra-low-power, high-accuracy voltage referencing in portable and battery-critical systems - emphasizing microamp-level IQ, low dropout, and integrated diagnostics like TEMP output.
FAQ
What is the operating temperature range for the MAX874EPA?
The MAX874EPA is specified for operation from -40°C to +85°C. This extended industrial temperature range is confirmed in the "Ordering Information" table and validated across all electrical characteristics sections labeled "MAX874E", including output voltage, tempco, load regulation, and supply current vs. temperature plots. The "E" suffix explicitly denotes this grade.
Does the MAX874EPA provide a temperature-sensing function?
Yes, the MAX874EPA includes a dedicated TEMP pin (Pin 3) that outputs a voltage proportional to junction temperature (±2.3mV/°C). Because its power dissipation is <100µW, junction temperature closely tracks ambient - enabling accurate ambient sensing without external components. The TEMP output must be buffered or connected to a high-impedance input.
Can the MAX874EPA drive capacitive loads, and how is stability ensured?
Yes, the MAX874EPA can drive capacitive loads up to 1000pF directly. For larger loads, a compensation capacitor (CLOAD/100) must be connected from COMP (Pin 8) to VOUT (Pin 6), as specified in the Applications Information section and Figure 2. This configuration prevents oscillation and ensures stability with ceramic or tantalum output filters.
Is the MAX874EPA pin-compatible with other devices in the MAX872/MAX874 family?
Yes, all MAX872/MAX874 variants - including MAX874EPA, MAX874CPA, MAX874ESA - share identical 8-pin DIP/SO pinouts and terminal functions. Pin mapping (VIN, GND, TEMP, TRIM, COMP, VOUT, I.C.) is consistent across grades; only temperature range, initial accuracy, and drift specifications differ.
Why is the MAX874EPA marked "Not Recommended for New Designs"?
The MAX874EPA is marked "Not Recommended for New Designs" because it was manufactured using an obsolete wafer process no longer supported by Maxim. While fully functional and documented, new designs should consider modern alternatives like REF5040 or ADR444 - unless legacy compatibility, DIP packaging, or the integrated TEMP output are mandatory requirements.
MAX874EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 400 µA
- Tolerance:
- ±0.38%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 90µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.3V ~ 20V
- Current - Supply:
- 15µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX874EPA FAQ
1.How can I place an order for MAX874EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX874EPA 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 MAX874EPA reliable?
The price and inventory of MAX874EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX874EPA is usually 5 days.
3.What payment methods are accepted for MAX874EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX874EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX874EPA?
MAX874EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX874EPA 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 MAX874EPA?
For technical support, including MAX874EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX874EPA requirements.
6.How does Aetrix verify that MAX874EPA is sourced from the original manufacturer or authorized distributors?
All MAX874EPA 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 MAX874EPA meets industry standards.
7.What is the process for return or replacement of MAX874EPA?
All MAX874EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX874EPA, 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 MAX874EPA part is unused and in its original packaging.
Return procedure for MAX874EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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