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Analog Devices Inc./Maxim Integrated MAX6194BESA+T
- Part No.:
- MAX6194BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6194BESA+T.pdf
- Description:
- IC VREF SERIES 0.11% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,412
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Product details
Overview
MAX6194BESA+T 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 - ideal for high-accuracy ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the MAX6194BESA+T datasheet, MAX6194BESA+T pinout, MAX6194BESA+T application, or MAX6194BESA+T equivalent, this page provides verified specifications, SO-8 package details, load-regulation behavior at 500µA, dropout performance down to 100mV, and real-world alternatives for precision analog signal chains.
Technical Context
The MAX6194BESA+T employs a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve <5ppm/°C temperature drift and ±2mV (±0.044%) initial tolerance. It operates as a series-mode reference, sourcing or sinking up to ±500µA while maintaining regulation.
Internally compensated for stability with capacitive loads up to 2.2nF, it achieves 180µs turn-on settling time to 0.1% and exhibits 0.16µV/µA load regulation and 25µV/V line regulation - enabling direct use in high-resolution data acquisition without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±2mV (guaranteed over -40°C to +85°C; enables precise 12-bit+ ADC full-scale calibration) |
| Temp Coefficient | ≤5ppm/°C (max drift of ±0.18mV over full temp range; supports industrial-grade measurement stability) |
| Quiescent Current | ≤35µA (enables >10-year battery life in 10µA-sleep systems; supply-current variation <2µA/V) |
| Dropout Voltage | 100mV at 500µA load (operates from 4.6V input in 4.5V systems; no headroom penalty vs. shunt refs) |
| Load Regulation | 0.16µV/µA (ΔVOUT = 80µV across full ±500µA load swing; critical for ratiometric sensor interfaces) |
| Noise (0.1–10Hz) | 215µVRMS (low-frequency noise floor suitable for precision weigh scales and strain-gauge bridges) |
| Capacitive Load | Stable with 0–2.2nF (no mandatory output cap; saves PCB area in space-constrained portable designs) |
Pinout & Package
MAX6194BESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and rated for -40°C to +85°C operation. Pin 1 is OUT, Pin 2 is IN, Pin 4 is GND; Pins 1,3,5,7,8 are No Connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 8 | N.C. | No internal connection; must remain unconnected per datasheet - avoids parasitic coupling or latch-up risk |
| 2 | IN | Supply input (VIN ≥ VOUT + 0.2V); accepts 4.7V–12.6V; immune to supply ripple up to 86dB rejection |
| 4 | GND | Analog ground reference; requires low-impedance star connection to minimize PSRR degradation |
| 6 | OUT | Precision 4.500V reference output; capable of sourcing/sinking ±500µA with <100mV dropout |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±2mV initial accuracy and <5ppm/°C TC without external calibration - reduces BOM count and test time |
| Curvature-corrected bandgap | Minimizes parabolic error across -40°C to +85°C - eliminates need for software temperature compensation |
| Series-mode architecture | Draws only 35µA quiescent current regardless of load state - superior efficiency vs. shunt references requiring worst-case biasing |
| Internal compensation | Stable with 0–2.2nF output capacitance - removes mandatory capacitor, simplifying layout in ultra-compact devices |
| Bi-directional load capability | Sinks or sources up to ±500µA - supports active filtering, current-source DACs, and bipolar op-amp biasing |
Applications
| Hand-Held Multimeters | Analog Front-Ends for Precision ADCs |
|---|---|
Use Scenario: Portable 6½-digit DMM requiring stable 4.5V reference for dual-slope integrator and auto-zero circuitry. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and offset nulling - directly sets measurement accuracy baseline. Use Value: ±2mV initial error and 5ppm/°C drift ensure <0.01% reading accuracy across field operating temperatures without recalibration. |
Use Scenario: 24-bit sigma-delta ADC in industrial process transmitter measuring RTD or thermocouple signals. IC Role / Device Role / Timing Role: Ratiometric reference for ADC reference input and excitation current source - maintains gain stability under varying supply conditions. Use Value: 0.16µV/µA load regulation prevents gain shift when excitation current changes, preserving absolute measurement integrity. |
| Portable Medical Sensors | Hard-Disk Drive Servo Control |
Use Scenario: Battery-powered ECG monitor with ultra-low-power sleep mode and fast wake-up response. IC Role / Device Role / Timing Role: Low-quiescent-current reference for analog signal conditioning and ADC - enables microamp-level system sleep current. Use Value: 35µA max IQ and 180µs turn-on settling allow rapid measurement bursts without reference warm-up delay or battery drain. |
Use Scenario: Voice-coil motor (VCM) position control loop in HDD requiring stable bias for differential amplifiers and comparators. IC Role / Device Role / Timing Role: Precision bias reference for servo amplifier stages - defines closed-loop accuracy and thermal drift margin. Use Value: 75ppm temperature hysteresis and 50ppm/1000hrs long-term stability prevent positional drift during repeated thermal cycles and extended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5045IDR | 4.5V output, 3ppm/°C TC, 950µA IQ, SO-8 - higher accuracy but 27× higher supply current | Better TC for lab-grade instruments; unsuitable for battery operation due to current draw | Select REF5045IDR only when TC <3ppm/°C is mandatory and power budget allows >900µA continuous draw. |
| ADR4540BRZ | 4.096V output, 3ppm/°C TC, 950µA IQ, SO-8 - different voltage, same power profile as REF5045 | Optimized for 12-bit/16-bit ADCs using 4.096V full-scale; not drop-in for 4.5V systems | Choose ADR4540BRZ when redesigning for 4.096V reference architecture and highest TC performance is required. |
Compared with MAX6194BESA+T, REF5045IDR offers tighter temperature coefficient but consumes 27× more current, making it impractical for portable use; ADR4540BRZ delivers superior TC at 4.096V but requires system-level voltage re-basing and cannot replace MAX6194BESA+T without schematic modification.
Availability
MAX6194BESA+T is available at Aetrix Electronics and suitable for hand-held instruments, precision ADC/DAC biasing, and industrial process control systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6194BESA+T 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) designs high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX6190–MAX6195/MAX6198 family was engineered specifically for micropower, high-accuracy voltage referencing in portable and battery-critical systems - prioritizing ultra-low IQ, low dropout, and minimal thermal drift.
FAQ
What is the maximum load current supported by the MAX6194BESA+T while maintaining regulation?
The MAX6194BESA+T is specified to source or sink up to ±500µA while maintaining output regulation within datasheet limits. At 500µA load, dropout voltage remains ≤100mV, and load regulation is characterized at 0.16µV/µA - meaning total output deviation is ≤80µV across the full load range. This capability supports driving ADC reference inputs, op-amp bias networks, and small current sources without external buffering.
Does the MAX6194BESA+T require an output capacitor for stability?
No, the MAX6194BESA+T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. Unlike many references, it does not require a minimum output capacitor for phase margin - enabling capacitor-free designs where board space is constrained. An optional capacitor may be added to improve transient response to step load changes, but it is never mandatory for stability.
What is the supply voltage range for the MAX6194BESA+T?
The MAX6194BESA+T operates with a supply voltage (VIN) from (VOUT + 0.2V) = 4.7V minimum to 12.6V maximum. This 4.7V–12.6V range ensures compatibility with standard 5V and higher rails while enabling operation in low-headroom systems - for example, from a 4.8V Li-ion cell with minimal dropout overhead.
How does the MAX6194BESA+T compare to shunt voltage references in terms of power efficiency?
The MAX6194BESA+T draws only 35µA quiescent current independent of load, whereas shunt references require bias current sufficient for worst-case load plus margin - often >1mA. This makes MAX6194BESA+T up to 30× more efficient in battery-powered systems, eliminating wasted current during idle periods and extending operational life significantly without sacrificing accuracy or regulation.
Is the MAX6194BESA+T pin-compatible with other members of the MAX6190–MAX6195 family?
Yes, all members of the MAX6190–MAX6195/MAX6198 family share identical 8-pin SO packaging and pinout (IN, GND, OUT, N.C.), including MAX6194BESA+T. This allows direct substitution between variants (e.g., MAX6194AESA+T, MAX6194CESA+T) for accuracy or temperature coefficient tuning without PCB revision - provided the output voltage and specification thresholds meet system requirements.
MAX6194BESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.11%
- Temperature Coefficient:
- 10ppm/°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
MAX6194BESA+T FAQ
1.How can I place an order for MAX6194BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6194BESA+T 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 MAX6194BESA+T reliable?
The price and inventory of MAX6194BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6194BESA+T is usually 5 days.
3.What payment methods are accepted for MAX6194BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6194BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6194BESA+T?
MAX6194BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6194BESA+T 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 MAX6194BESA+T?
For technical support, including MAX6194BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6194BESA+T requirements.
6.How does Aetrix verify that MAX6194BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6194BESA+T 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 MAX6194BESA+T meets industry standards.
7.What is the process for return or replacement of MAX6194BESA+T?
All MAX6194BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6194BESA+T, 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 MAX6194BESA+T part is unused and in its original packaging.
Return procedure for MAX6194BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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