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Analog Devices Inc./Maxim Integrated MAX874ESA+
- Part No.:
- MAX874ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX874ESA+.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:875
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Product details
Overview
MAX874ESA+ 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, 10µA max quiescent current, and operates from 4.3V to 20V supply with only 200mV dropout - enabling stable 4.096V reference operation from a standard 5V rail.
For engineers reviewing the MAX874ESA+ datasheet, MAX874ESA+ pinout, MAX874ESA+ application, or MAX874ESA+ equivalent, key selection considerations include its ultra-low IQ, tight output tolerance at -40°C to +85°C, TRIM-adjustable output, TEMP-pin temperature monitoring capability, and compatibility with capacitive load compensation via COMP pin.
Technical Context
The MAX874ESA+ is a two-terminal shunt-like series reference with internal bandgap core, trimmed during production for 4.096V ±0.2% at +25°C. Its architecture supports bidirectional 500µA load current (sourcing/sinking) while maintaining regulation under 200mV input headroom - critical for low-voltage 5V-system designs.
It integrates a dedicated TEMP pin delivering a voltage proportional to junction temperature (≈2.0V at +25°C, ±2.3mV/°C), and a COMP pin for stability control with capacitive loads >1000pF. Line regulation is specified at 75µV/V and load regulation at 1.0mV/mA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.2% (±8mV) at +25°C - enables direct 12-bit ADC full-scale calibration without scaling resistors |
| Quiescent Current | ≤10µA - extends battery life in portable instrumentation and remote sensors |
| Temperature Drift | ≤40ppm/°C over -40°C to +85°C - ensures ≤±16.4mV total error across industrial temperature range |
| Dropout Voltage | 200mV at ±500µA load - allows operation from 4.3V min input, compatible with 5V rails including LDO-tolerant supplies |
| Supply Range | 4.3V to 20V - supports wide-input industrial power rails and battery-backed systems |
| Load Regulation | 1.0mV/mA max - maintains accuracy under dynamic sensor or DAC loading |
| Line Regulation | 75µV/V max - rejects ripple and variation in upstream supply without external filtering |
Pinout & Package
MAX874ESA+ is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.75mm height). Pin 1 is marked with a beveled corner or dot; pin numbering follows counter-clockwise convention from top-left when viewed from top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input Supply Terminal | Accepts 4.3V–20V DC; must exceed VOUT by ≥200mV for regulation; high-impedance input minimizes source resistance sensitivity |
| GND (Pin 4) | Ground Reference | Primary return path for load, supply, and TEMP output; substrate tied to GND per die topography |
| TEMP (Pin 3) | Temperature-Proportional Output | Delivers ≈2.0V at +25°C, ±2.3mV/°C slope; requires high-Z buffer (e.g., op-amp follower) before ADC input |
| TRIM (Pin 5) | Output Voltage Adjustment Node | Allows ±150mV trimming range around 4.096V; adjustment alters tempco by ~7ppm/°C per 100mV deviation |
| COMP (Pin 8) | Capacitive Load Compensation Input | Connect CLOAD/100 capacitor from COMP to VOUT when total CLOAD >1000pF to ensure stability |
| VOUT (Pin 6) | Precision Reference Output | Provides regulated 4.096V ±0.2%; sources/sinks up to ±500µA while maintaining regulation |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed 4.096V Output | Factory-trimmed to ±0.2% at +25°C - eliminates need for external calibration in 12-bit data acquisition systems |
| Ultra-Low Quiescent Current | ≤10µA max - enables multi-year operation on coin-cell batteries in portable meters and IoT edge nodes |
| Integrated Temperature Monitor | TEMP pin provides linear voltage vs. junction temperature (≈2.0V at +25°C) - supports thermal compensation of sensor gain/offset without extra IC |
| Low Dropout Operation | 200mV dropout at ±500µA - permits use with 5V supplies even after LDO drop or cable loss |
| Capacitive Load Stability Control | COMP pin enables robust operation with large output capacitance (e.g., 10µF ceramic + ESR) required for noise-sensitive SAR ADCs |
Applications
| Portable Multimeter Front-End | Industrial 4–20mA Transmitter |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 4.096V reference for 12-bit ADC to resolve 1mV steps on 4V range. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end and ADC conversion. Use Value: ±0.2% initial accuracy and 40ppm/°C drift ensure <±0.02% full-scale error over operating temperature, meeting Class II DMM specifications. |
Use Scenario: Loop-powered 4–20mA transmitter in hazardous environments where supply headroom is limited and long-term stability is critical. IC Role / Device Role / Timing Role: Primary reference for DAC and current-sense amplifier, establishing precise current setpoint accuracy. Use Value: 10µA quiescent current leaves >100µA margin for loop-powered circuitry; 200mV dropout enables reliable operation down to 4.3V supply. |
| Medical Patient Monitor Sensor Bias | Programmable Logic Controller (PLC) Analog Input Module |
Use Scenario: Battery-backed patient monitor measuring ECG/SpO₂ with low-noise analog signal chain requiring calibrated DC bias. IC Role / Device Role / Timing Role: Stable reference for op-amp biasing and ADC reference in isolated analog signal paths. Use Value: Low 1Hz–10Hz noise (90µVp-p) and minimal load regulation (1.0mV/mA) prevent baseline wander and gain error in biopotential measurements. |
Use Scenario: Modular PLC analog input card supporting multiple sensor types (RTD, thermocouple, voltage) with shared 4.096V reference for 16-bit ADC. IC Role / Device Role / Timing Role: System-level reference source distributed to multiple channel signal conditioners and ADCs. Use Value: TRIM pin allows board-level calibration to compensate for PCB trace resistance and layout tolerances; TEMP pin enables ambient temperature compensation of RTD linearization. |
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, 100µA IQ, SO-8 package | Lower drift but 10× higher quiescent current; no TEMP or TRIM pins | Preferred for high-stability lab equipment where power is not constrained; unsuitable for battery operation |
| ADR444BRZ | 4.096V, 3ppm/°C max drift, 750µA IQ, SO-8 package | Higher precision and lower noise, but significantly higher IQ and no integrated temperature monitor | Best for metrology-grade instruments; lacks TEMP functionality needed for thermal compensation in field-deployed sensors |
Compared with REF5040IDR and ADR444BRZ, the MAX874ESA+ trades absolute drift performance for ultra-low power, integrated temperature sensing, and output adjustability - making it uniquely suited for portable, battery-operated, and thermally compensated industrial measurement systems where supply headroom and board space are constrained.
Availability
MAX874ESA+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial 4–20mA transmitters, and medical sensor biasing requiring stable component supply despite its Not Recommended for New Designs status.
Supply support for MAX874ESA+ 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 space- and energy-constrained systems - particularly handheld test equipment and battery-powered sensors where 10µA IQ and 200mV dropout were critical design requirements.
FAQ
What is the operating temperature range for MAX874ESA+?
The MAX874ESA+ is rated for -40°C to +85°C operation (industrial grade). All key specifications - including output voltage accuracy (±0.2%), temperature coefficient (≤40ppm/°C), load regulation (1.0mV/mA), and quiescent current (≤10µA) - are guaranteed across this full range, as confirmed in the MAX874E electrical characteristics tables.
Does MAX874ESA+ support output voltage trimming, and how does it affect performance?
Yes, MAX874ESA+ includes a TRIM pin (Pin 5) enabling ±150mV adjustment around the nominal 4.096V output. Trimming shifts the output voltage but also increases temperature coefficient by approximately 7ppm/°C per 100mV deviation from factory trim - a documented trade-off detailed in the Applications Information section.
Can MAX874ESA+ drive a 10µF output capacitor directly?
No - if total capacitive load on VOUT exceeds 1000pF, MAX874ESA+ requires external compensation: a capacitor equal to CLOAD/100 must be connected from COMP (Pin 8) to VOUT to maintain stability. This requirement is explicitly stated in Note 1 and Figure 2 of the datasheet.
What is the function of the TEMP pin on MAX874ESA+, and how is it used?
The TEMP pin (Pin 3) outputs a voltage linearly proportional to junction temperature (≈2.0V at +25°C, ±2.3mV/°C). Since device power dissipation is <100µW, junction temperature closely tracks ambient. The pin must be buffered with a high-impedance amplifier before connection to an ADC for thermal compensation or out-of-range detection.
Is MAX874ESA+ pin-compatible with other members of the MAX872/MAX874 family?
Yes - MAX874ESA+ shares identical 8-pin SO packaging and pinout with MAX872ESA+, MAX874CPA, MAX874EPA, and all other variants in the family. Pin functions (VIN, GND, TEMP, TRIM, COMP, VOUT) and physical layout are fully consistent across the series, enabling direct substitution where voltage and temperature range match.
MAX874ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX874ESA+ FAQ
1.How can I place an order for MAX874ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX874ESA+ 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 MAX874ESA+ reliable?
The price and inventory of MAX874ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX874ESA+ is usually 5 days.
3.What payment methods are accepted for MAX874ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX874ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX874ESA+?
MAX874ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX874ESA+ 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 MAX874ESA+?
For technical support, including MAX874ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX874ESA+ requirements.
6.How does Aetrix verify that MAX874ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX874ESA+ 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 MAX874ESA+ meets industry standards.
7.What is the process for return or replacement of MAX874ESA+?
All MAX874ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX874ESA+, 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 MAX874ESA+ part is unused and in its original packaging.
Return procedure for MAX874ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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