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Analog Devices Inc./Maxim Integrated MAX6194AESA+
- Part No.:
- MAX6194AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6194AESA+.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:142
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Product details
Overview
MAX6194AESA+ from Maxim Integrated is a precision, micropower, low-dropout series voltage reference delivering 4.500V output with ±2mV initial accuracy, 5ppm/°C max temperature coefficient, and 35µA max quiescent current - designed for high-accuracy ADC/DAC biasing in battery-powered instrumentation and industrial process control systems.
For engineers reviewing the MAX6194AESA+ datasheet, MAX6194AESA+ pinout, MAX6194AESA+ application, or MAX6194AESA+ equivalent, this page provides verified specifications, SO-8 package layout, real-world load/line regulation behavior, and validated alternative options for precision analog signal chains requiring stable 4.5V reference voltage under varying temperature and load conditions.
Technical Context
The MAX6194AESA+ employs a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve <5ppm/°C temperature drift and ±2mV (0.044%) initial tolerance at 4.5V. It operates as a series-mode reference capable of sourcing and sinking up to ±500µA while maintaining regulation.
Internally compensated for stability with capacitive loads up to 2.2nF, it features 100mV dropout at 500µA load, 0.16µV/µA load regulation, and 25µV/V line regulation - enabling robust performance in low-voltage, space-constrained systems where supply headroom is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±2mV (guaranteed over -40°C to +85°C; enables direct interface with 4.5V-rail ADCs without scaling) |
| Temp Coefficient | ≤5ppm/°C (max drift of ±0.18mV over full temp range; supports 16-bit+ system accuracy) |
| Quiescent Current | ≤35µA (enables >1-year battery life in 10µA-sleep IoT sensors with periodic measurement) |
| Dropout Voltage | 100mV at 500µA load (operates from 4.6V supply; compatible with single-cell LiFePO₄ or regulated 5V rails) |
| Load Regulation | 0.16µV/µA (output shift <80µV across full ±500µA load swing; critical for ratiometric sensor excitation) |
| Line Regulation | 25µV/V (output change <250µV over 4.6V–12.6V input; eliminates need for pre-regulation in wide-input systems) |
| Noise (0.1–10Hz) | 215µVRMS (low-frequency noise floor suitable for high-resolution weigh-scale and precision DAC applications) |
Pinout & Package
MAX6194AESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free, with exposed pad not electrically connected. Pin 4 is GND; Pin 6 is OUT; Pin 2 is IN; Pins 1,3,5,7,8 are No Connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 | IN | Supply voltage input (2.7V min above VOUT; must be ≥4.6V for full 500µA load capability) |
| Pin 4 | GND | Analog ground reference; requires low-impedance connection to system AGND plane |
| Pin 6 | OUT | Precision 4.500V reference output; capable of sourcing/sinking ±500µA with <100mV dropout |
| Pins 1,3,5,7,8 | N.C. | No internal connection; may be left floating or tied to GND for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enable ±2mV initial accuracy and <5ppm/°C tempco without external calibration |
| Curvature-correction circuit | Reduces parabolic error in bandgap core, ensuring monotonic VOUT vs. temperature |
| Capacitive-load stability to 2.2nF | Eliminates need for output capacitor in space-constrained designs; reduces BOM count |
| ±500µA sink/source capability | Supports active ratiometric sensor biasing and dual-direction DAC reference loading |
| Internal compensation | Guarantees stability without external compensation components across all operating conditions |
Applications
| Hand-Held Instrumentation | Analog-to-Digital Converters |
|---|---|
Use Scenario: Portable multimeter using 24-bit sigma-delta ADC with auto-ranging front-end. IC Role / Device Role / Timing Role: Primary 4.5V reference for ADC VREF input and programmable gain amplifier biasing. Use Value: ±2mV initial accuracy and 5ppm/°C drift ensure <0.01% measurement uncertainty across 0–40°C operating range without recalibration. |
Use Scenario: Industrial data acquisition module digitizing 4–20mA loop signals with 18-bit SAR ADC. IC Role / Device Role / Timing Role: Stable 4.5V reference for ADC reference input and current-source DAC feedback. Use Value: 0.16µV/µA load regulation prevents code-dependent offset errors during dynamic full-scale transitions. |
| Industrial Process Control | Precision 4.5V Systems |
Use Scenario: Loop-powered transmitter with HART modem, requiring ultra-low quiescent current. IC Role / Device Role / Timing Role: Low-power 4.5V reference for sensor signal conditioning and microcontroller ADC reference. Use Value: 35µA max supply current allows operation within 3.5mA loop budget while maintaining 16-bit linearity. |
Use Scenario: FPGA-based motor controller using 4.5V I/O bank with external ADC for current sensing. IC Role / Device Role / Timing Role: System-level 4.5V reference shared between FPGA I/O VCCIO and ADC reference input. Use Value: 100mV dropout enables direct use of 4.6V buck converter output, eliminating extra LDO stage and saving board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4545BRZ | 4.5V output, ±1.5mV initial accuracy, 3ppm/°C max tempco, 950µA supply current | Higher power consumption; better accuracy/tempco but incompatible with sub-100µA battery systems | Select when ultimate long-term stability and lower tempco outweigh quiescent current constraints |
| REF5045IDR | 4.5V output, ±1mV initial accuracy, 3ppm/°C max tempco, 950µA supply current, 1.2V dropout at 10mA | Designed for high-current, low-noise lab equipment; not optimized for micropower or low-dropout | Choose for high-precision bench instruments where supply current and dropout are secondary concerns |
Compared with ADR4545BRZ and REF5045IDR, the MAX6194AESA+ trades minor initial accuracy and tempco degradation for >25× lower quiescent current and 10× lower dropout - making it uniquely suited for portable, battery-operated, and low-headroom 4.5V reference applications where efficiency and size are primary constraints.
Availability
MAX6194AESA+ is available at Aetrix Electronics and suitable for hand-held instrumentation, precision ADC/DAC reference design, and industrial process control systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6194AESA+ 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, automotive, and communications markets.
The MAX6190–MAX6195/MAX6198 family was designed specifically for micropower, low-dropout precision voltage references in battery-powered and space-constrained instrumentation - emphasizing ultra-low quiescent current, tight initial tolerance, and minimal thermal drift without external components.
FAQ
What is the maximum load current supported by the MAX6194AESA+ while maintaining regulation?
The MAX6194AESA+ guarantees regulation for sourcing and sinking currents up to ±500µA. At 500µA load, dropout voltage remains ≤100mV, meaning the device maintains 4.500V output as long as input voltage stays ≥4.6V. This capability supports both active sensor biasing and bidirectional DAC reference loading without external buffers.
Does the MAX6194AESA+ require an output capacitor for stability?
No, the MAX6194AESA+ is internally compensated and stable with capacitive loads from 0 to 2.2nF. An output capacitor is optional and only recommended in applications subject to fast load or supply transients - where it reduces overshoot/undershoot. Omitting it saves board space and BOM cost in static or slowly varying systems.
What is the supply voltage range for the MAX6194AESA+?
The MAX6194AESA+ operates with input voltage from (VOUT + 0.2V) = 4.7V minimum up to 12.6V maximum. For full 500µA load capability, VIN must be ≥4.6V; however, the absolute minimum specified for regulation is 4.7V per datasheet electrical characteristics table. Operation below 4.7V may result in dropout or loss of accuracy.
How does the MAX6194AESA+ compare to the MAX6194BESA+ and MAX6194CESA+?
The MAX6194AESA+ offers the highest grade: ±2mV initial accuracy and ≤5ppm/°C temperature coefficient. The MAX6194BESA+ is rated at ±5mV/10ppm/°C, and MAX6194CESA+ at ±10mV/25ppm/°C. All share identical SO-8 package, pinout, and electrical behavior outside these trimmed parameters - allowing drop-in selection based on system accuracy requirements.
Is the MAX6194AESA+ RoHS-compliant and lead-free?
Yes, the "+" suffix in MAX6194AESA+ explicitly denotes a lead(Pb)-free and RoHS-compliant package per Maxim Integrated's ordering nomenclature. It uses standard SnAgCu (SAC305) solder-compatible terminations and meets JEDEC J-STD-020 reflow profiles, including peak temperature up to +260°C.
MAX6194AESA+ 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):
- 4.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 110µVp-p
- Noise - 10Hz to 10kHz:
- 215µVrms
- Voltage - Input:
- 4.7V ~ 12.6V
- Current - Supply:
- 35µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6194AESA+ FAQ
1.How can I place an order for MAX6194AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6194AESA+ 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 MAX6194AESA+ reliable?
The price and inventory of MAX6194AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6194AESA+ is usually 5 days.
3.What payment methods are accepted for MAX6194AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6194AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6194AESA+?
MAX6194AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6194AESA+ 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 MAX6194AESA+?
For technical support, including MAX6194AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6194AESA+ requirements.
6.How does Aetrix verify that MAX6194AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6194AESA+ 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 MAX6194AESA+ meets industry standards.
7.What is the process for return or replacement of MAX6194AESA+?
All MAX6194AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6194AESA+, 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 MAX6194AESA+ part is unused and in its original packaging.
Return procedure for MAX6194AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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