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Analog Devices Inc./Maxim Integrated MAX6168BESA+T
- Part No.:
- MAX6168BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6168BESA+T.pdf
- Description:
- IC VREF SERIES 1.8V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,750
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Product details
Overview
MAX6168BESA+T from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 1.800V output with ±5mV initial accuracy and 4–10ppm/°C temperature coefficient over –40°C to +85°C. It sources up to 5mA, sinks 2mA, operates from (VOUT + 200mV) to 12.6V, and draws only 100–120µA quiescent current-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6168BESA+T datasheet, MAX6168BESA+T pinout, MAX6168BESA+T application, or MAX6168BESA+T equivalent, key selection criteria include its 1.8V output tolerance, ultra-low supply-current variation (≤8µA/V), dropout as low as 50mV at 1mA, stability with 1µF capacitive loads, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6168BESA+T employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve tight initial accuracy and low thermal drift. Its internal compensation eliminates need for external stabilization capacitors, reducing board area and component count.
As a three-terminal series-mode reference, it delivers supply-current independence from input voltage (ΔIIN/ΔVIN ≤ 8.0µA/V), unlike shunt-mode alternatives requiring external bias resistors. Output voltage is referenced to GND, with absolute max ratings of IN = –0.3V to +13.5V and OUT = –0.3V to (VIN + 0.3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±5mV at +25°C - ensures precise 1.8V rail generation for low-voltage ADCs and sensors |
| Temp Coefficient | 4–10ppm/°C - guarantees <±0.072mV drift over full –40°C to +85°C range |
| Quiescent Current | 100–120µA typical - enables >1-year battery life in 10µA-systems with minimal load |
| Dropout Voltage | 50–200mV at 1mA - supports operation down to 2.0V input in 1.8V systems |
| Load Regulation | 0.5–0.9mV/mA sourcing - maintains <4.5mV error across full 0–5mA load range |
| Noise (0.1–10Hz) | 22µVp-p - low enough for 16-bit+ SAR ADC reference without additional filtering |
| Ripple Rejection | 78dB at 120Hz - suppresses AC line noise on shared power rails |
Pinout & Package
MAX6168BESA+T is housed in an 8-pin SO (Small Outline) package with exposed pad not electrically connected. Pin 1, 3, 5, 7, and 8 are No Connect (N.C.), simplifying layout by eliminating unused traces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Input Voltage Supply | Accepts 2.0V to 12.6V; requires no external resistor; input bypass cap (0.1µF) recommended for transient immunity |
| 4 (GND) | Ground Reference | Reference node for output and internal bandgap; must be low-impedance connection to system ground plane |
| 6 (OUT) | Precision Output | 1.800V reference source; stable with 0–1µF capacitive loads; no external compensation required |
| 1,3,5,7,8 | No Connection | Unbonded pins; must remain unconnected per datasheet to avoid parametric shift or damage |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±5mV initial accuracy and 4–10ppm/°C TC without post-package calibration |
| Internally compensated architecture | Eliminates need for external output capacitor - saves PCB area and reduces BOM cost |
| Supply-current independence | ΔIIN/ΔVIN ≤ 8.0µA/V ensures consistent 100–120µA draw across full 2.0–12.6V input range |
| Low-output-impedance design | Stable under 1µF capacitive loads and ±5mA transients - suitable for driving multiplexed ADC inputs |
| Curvature-correction circuit | Reduces parabolic temperature-induced error - critical for wide-temp industrial sensor nodes |
Applications
| Portable DMM Front-End | Industrial 4–20mA Transmitter |
|---|---|
Use Scenario: High-resolution handheld digital multimeter measuring mV-level signals with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Precision 1.8V reference for ADC VREF input and analog front-end gain-setting resistors. Use Value: ±5mV initial error and 10ppm/°C drift ensure <0.02% full-scale measurement accuracy across operating temperature. | Use Scenario: Loop-powered 4–20mA transmitter in hazardous-area process control with 24V supply headroom. IC Role / Device Role / Timing Role: Stable 1.8V reference for DAC output scaling and sensor excitation circuitry. Use Value: 50mV dropout allows operation at 2.0V input, preserving >200mV margin before brownout during 24V line sag. |
| Medical ECG Signal Chain | Battery-Powered IoT Sensor Node |
Use Scenario: Low-noise ECG analog front-end in wearable patch monitor powered by single Li-ion cell. IC Role / Device Role / Timing Role: Ultra-low-noise (22µVp-p) 1.8V reference for instrumentation amplifier bias and ADC reference. Use Value: Sub-25µVp-p 0.1–10Hz noise prevents baseline wander masking of <100µV cardiac signals. | Use Scenario: Wireless environmental sensor node using coin-cell battery and ultra-low-power microcontroller with integrated 12-bit ADC. IC Role / Device Role / Timing Role: Micropower 1.8V reference enabling ADC conversion during brief wake-up bursts. Use Value: 100µA quiescent current extends 10-year battery life when paired with 1µA sleep-mode MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3418ARJZ-R7 | 1.8V output, ±2mV initial accuracy, 3ppm/°C TC, 125µA IQ, SOT-23-5 package | Smaller footprint but lower sink current (1mA vs. 2mA); no N.C. pins - simpler routing | Preferred for ultra-compact designs where tighter initial accuracy outweighs SO-8 mechanical robustness |
| REF3318AIDBVR | 1.8V output, ±1.5mV initial accuracy, 10ppm/°C TC, 60µA IQ, SOT-23-3 package | Lower quiescent current but limited 5mA sourcing capability and no sinking capability | Best for always-on, ultra-low-power sensor bias where load current is purely sourcing |
Compared with ADR3418ARJZ-R7 and REF3318AIDBVR, MAX6168BESA+T offers superior sink capability (2mA), higher output drive strength, and SO-8 mechanical reliability-making it optimal for mixed-sourcing/sinking loads in industrial signal conditioning where long-term stability trumps minimal size.
Availability
MAX6168BESA+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial 4–20mA transmitters, medical ECG front-ends, and battery-powered IoT sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6168BESA+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX6161–MAX6168 family was engineered specifically for high-accuracy, low-power, low-dropout voltage referencing in space- and energy-constrained systems-emphasizing micropower operation, internal compensation, and wide-input-voltage flexibility.
FAQ
What is the maximum load current that MAX6168BESA+T can sink while maintaining specification?
MAX6168BESA+T is specified to sink up to 2mA while maintaining output voltage regulation within its load regulation spec of 1.5–4mV/mA. At –2mA sink, the output voltage change remains ≤8mV, ensuring stability for bidirectional reference applications such as precision current-source biasing. Exceeding 2mA may cause deviation beyond guaranteed parameters.
Does MAX6168BESA+T require an external output capacitor for stability?
No, MAX6168BESA+T does not require an external output capacitor for frequency stability due to its internally compensated architecture. The device remains stable with 0–1µF capacitive loads, making it ideal for space-critical applications. Adding a 1µF capacitor improves transient response but is optional-not mandatory for basic operation.
What is the minimum input voltage required for MAX6168BESA+T to regulate at 1.800V output?
The minimum input voltage for MAX6168BESA+T is VOUT + 200mV = 2.0V, per datasheet specifications. At 1mA load, dropout is guaranteed ≤200mV, meaning regulation holds down to 2.0V input. For best performance across temperature and load, a 2.5V minimum is recommended-ensuring margin against dropout increase at –40°C or high current.
How does the initial accuracy of MAX6168BESA+T compare to the 'A' grade variant?
MAX6168BESA+T has ±5mV initial accuracy at +25°C, whereas the MAX6168AESA+T variant offers tighter ±2mV. This 3mV difference corresponds to ±0.167% error at 1.8V versus ±0.111%, making the 'B' grade suitable for cost-sensitive applications where 0.05% additional error is acceptable-such as non-calibrated portable instruments.
Can MAX6168BESA+T be used in applications requiring long-term stability over 1000 hours?
Yes, MAX6168BESA+T exhibits 80ppm/1000hr long-term stability at +25°C, verified per JEDEC JESD22-A117. This equates to <±0.144mV drift over 1000 hours-well within requirements for industrial data loggers and medical devices needing recalibration intervals exceeding one year.
MAX6168BESA+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):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.28%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 22µVp-p
- Noise - 10Hz to 10kHz:
- 25µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 120µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6168BESA+T FAQ
1.How can I place an order for MAX6168BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6168BESA+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 MAX6168BESA+T reliable?
The price and inventory of MAX6168BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6168BESA+T is usually 5 days.
3.What payment methods are accepted for MAX6168BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6168BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6168BESA+T?
MAX6168BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6168BESA+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 MAX6168BESA+T?
For technical support, including MAX6168BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6168BESA+T requirements.
6.How does Aetrix verify that MAX6168BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6168BESA+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 MAX6168BESA+T meets industry standards.
7.What is the process for return or replacement of MAX6168BESA+T?
All MAX6168BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6168BESA+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 MAX6168BESA+T part is unused and in its original packaging.
Return procedure for MAX6168BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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