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Analog Devices Inc./Maxim Integrated MAX6168AESA+T
- Part No.:
- MAX6168AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6168AESA+T.pdf
- Description:
- IC VREF SERIES 0.11% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
The MAX6168AESA+T from Maxim Integrated is a precision, micropower, low-dropout series voltage reference delivering a stable 1.800V output with ±2mV initial accuracy and a maximum temperature coefficient of 5ppm/°C over -40°C to +85°C. It sources up to 5mA, sinks 2mA, operates from (VOUT + 200mV) to 12.6V, and draws only 100µA typical supply current-ideal for high-accuracy ADC biasing in portable battery-powered systems.
For engineers reviewing the MAX6168AESA+T datasheet, MAX6168AESA+T pinout, MAX6168AESA+T application, or MAX6168AESA+T equivalent, key selection criteria include its 5ppm/°C tempco, 200mV max dropout at 1mA, 0.9mV/mA load regulation, 78dB ripple rejection at 120Hz, and SO-8 package compatibility with space-constrained, low-power precision analog designs.
Technical Context
This three-terminal series-mode voltage reference uses proprietary curvature correction and laser-trimmed thin-film resistors to achieve ultra-low drift. Its internal compensation eliminates need for external capacitors, and supply current varies by only 8µA/V across input voltage-enabling stable operation without wasteful biasing.
Designed for ground-referenced output, it supports sourcing and sinking loads while maintaining tight regulation under line (42–200µV/V), load (0.5–0.9mV/mA sourcing), and thermal stress. Output hysteresis is limited to 125ppm, and long-term stability is 80ppm/1000hr at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±2mV at +25°C - ensures precise ADC full-scale calibration without trimming |
| Tempco (max) | 5ppm/°C - enables <±0.36mV drift over -40°C to +85°C for metrology-grade stability |
| Dropout Voltage | 200mV max at 1mA - allows operation from 2.0V supply in 1.8V system rails |
| Supply Current | 100µA typ, 120µA max - extends battery life in always-on sensor nodes |
| Load Regulation | 0.9mV/mA sourcing - maintains reference integrity with dynamic ADC input currents |
| Ripple Rejection | 78dB at 120Hz - suppresses power-supply noise coupling into precision analog signal chains |
| Noise (0.1–10Hz) | 22µVP-P - minimizes quantization uncertainty in 16-bit+ data converters |
Pinout & Package
MAX6168AESA+T is housed in an 8-pin SO (Small Outline) package with exposed pad not electrically connected. Pins 1, 3, 5, 7, and 8 are No Connect (N.C.), internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Input Voltage Supply | Accepts 2.0V to 12.6V; requires no external series resistor unlike shunt references |
| 4 (GND) | Analog Ground Reference | Return path for reference output and internal circuitry; must be low-impedance |
| 6 (OUT) | Precision Voltage Output | Delivers regulated 1.800V; stable with ≥1µF capacitive loads but needs no capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enable ±2mV initial accuracy and 5ppm/°C tempco without post-package trimming |
| Internally compensated architecture | Eliminates external compensation capacitor-reduces BOM count and PCB area |
| Supply-current independence | Variation ≤8µA/V ensures predictable battery drain across input voltage range |
| Low-output-impedance design | Supports 5mA sourcing and 2mA sinking while maintaining <1mV regulation error |
| Stable with 1µF capacitive loads | Enables use with noisy digital supplies or long PCB traces without oscillation risk |
Applications
| Portable Battery-Powered Systems | Notebook Computers |
|---|---|
Use Scenario: Powering 16-bit SAR ADCs in handheld DMMs or gas sensors operating from single Li-ion cells. IC Role / Device Role / Timing Role: Provides stable 1.800V reference for ADC full-scale calibration and offset nulling. Use Value: Enables ±0.005% measurement accuracy over temperature and battery discharge cycle. | Use Scenario: Biasing precision DACs in notebook audio codecs requiring low-noise analog outputs. IC Role / Device Role / Timing Role: Supplies clean 1.800V reference to DAC VREF pin, rejecting switching regulator ripple. Use Value: Achieves >95dB SNR by limiting reference noise to 22µVP-P (0.1–10Hz). |
| Cellular Phones | Precision +3V/+5V Systems |
Use Scenario: Calibrating RF front-end gain blocks and PA bias control loops in LTE/5G handsets. IC Role / Device Role / Timing Role: Delivers low-drift 1.800V reference for closed-loop analog calibration circuits. Use Value: Maintains <±0.5dB gain accuracy over -30°C to +85°C ambient with 5ppm/°C tempco. | Use Scenario: Serving as secondary reference in industrial PLC I/O modules with isolated 3.3V/5V domains. IC Role / Device Role / Timing Role: Generates local 1.800V reference for isolated ADCs, decoupled from main rail noise. Use Value: Provides 78dB PSRR at 120Hz to reject transformer-coupled power supply interference. |
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 | Initial accuracy ±1.2mV, tempco 10ppm/°C, 150µA supply current, SOT-23-5 package | Higher accuracy but larger tempco and higher quiescent current; smaller footprint but lower output drive (10mA) | Select when board space is critical and 10ppm/°C drift is acceptable; avoid if sourcing >5mA or operating near +85°C |
| REF3318AIDBVR | Initial accuracy ±1.5mV, tempco 10ppm/°C, 45µA supply current, SOT-23-3 package | Lower supply current but no sink capability, limited to 5mA sourcing, no SO-8 thermal mass | Prefer for ultra-low-power wake-up circuits; unsuitable for bidirectional load or high-temp industrial use |
Compared with ADR3418ARJZ-R7 and REF3318AIDBVR, the MAX6168AESA+T offers superior thermal stability (5ppm/°C vs. 10ppm/°C), bidirectional load support (±2mA), and SO-8 thermal performance-making it optimal for high-accuracy, thermally demanding, or mixed-sourcing/sinking applications where layout space permits.
Availability
MAX6168AESA+T is available at Aetrix Electronics and suitable for portable battery-powered systems, notebook computers, cellular phones, and precision +3V/+5V systems requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6168AESA+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, mixed-signal, and power-management ICs for precision, reliability, and energy efficiency in demanding environments.
The MAX6161–MAX6168 family was engineered specifically for micropower, low-dropout, high-output-current voltage referencing in battery-constrained and high-accuracy applications-emphasizing minimal external components and exceptional thermal stability.
FAQ
What is the maximum dropout voltage specification for MAX6168AESA+T at 1mA load?
The MAX6168AESA+T has a maximum dropout voltage of 200mV at 1mA load current, defined as the minimum (VIN – VOUT) required to maintain output regulation within 0.2% of nominal 1.800V. This allows reliable operation from as low as 2.0V input in 1.8V system architectures, supporting deep battery discharge in portable devices without reference collapse.
Does MAX6168AESA+T require an external output capacitor for stability?
No, the MAX6168AESA+T is internally compensated and does not require an external output capacitor for stability. It remains stable with capacitive loads up to 1µF, and many space-constrained applications operate reliably with no output capacitor-reducing BOM cost and PCB area while maintaining phase margin across temperature and load conditions.
What is the supply current behavior of MAX6168AESA+T versus input voltage?
The MAX6168AESA+T exhibits supply current variation of only 3.4µA/V to 8.0µA/V across its input range (VOUT + 0.2V to 12.6V), with typical quiescent current of 100µA. This near-constant current draw-unlike shunt references-ensures predictable battery life and eliminates wasted bias current, especially beneficial in wide-input-voltage battery systems.
How does the 5ppm/°C temperature coefficient of MAX6168AESA+T translate to actual voltage drift?
With a 5ppm/°C maximum temperature coefficient, the MAX6168AESA+T drifts no more than ±0.09mV over the full -40°C to +85°C range (125°C ΔT × 5ppm/°C × 1.8V = ±1.125mV worst-case; actual spec limits total drift to ±0.36mV due to box-method calculation). This enables sub-LSB accuracy in 16-bit systems without software calibration.
Can MAX6168AESA+T sink current, and what is its maximum sink capability?
Yes, the MAX6168AESA+T can sink up to 2mA of load current, with a specified sink regulation of 1.5–4mV/mA. This bidirectional capability supports active pull-down in precision DAC reference buffers, current-source calibration circuits, and fault-tolerant bias networks-extending utility beyond standard sourcing-only references.
MAX6168AESA+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:
- ±0.11%
- Temperature Coefficient:
- 5ppm/°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
MAX6168AESA+T FAQ
1.How can I place an order for MAX6168AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6168AESA+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 MAX6168AESA+T reliable?
The price and inventory of MAX6168AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6168AESA+T is usually 5 days.
3.What payment methods are accepted for MAX6168AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6168AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6168AESA+T?
MAX6168AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6168AESA+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 MAX6168AESA+T?
For technical support, including MAX6168AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6168AESA+T requirements.
6.How does Aetrix verify that MAX6168AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6168AESA+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 MAX6168AESA+T meets industry standards.
7.What is the process for return or replacement of MAX6168AESA+T?
All MAX6168AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6168AESA+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 MAX6168AESA+T part is unused and in its original packaging.
Return procedure for MAX6168AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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