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Analog Devices Inc./Maxim Integrated MAX6168BESA+
- Part No.:
- MAX6168BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6168BESA+.pdf
- Description:
- IC VREF SERIES 1.8V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,711
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Product details
Overview
MAX6168BESA+ from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 1.800V output referenced to ground. It features ±5mV initial accuracy, 4–10ppm/°C temperature coefficient (max), 200mV max dropout at 1mA, and operates from VOUT + 0.2V to 12.6V input across –40°C to +85°C - ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6168BESA+ datasheet, MAX6168BESA+ pinout, MAX6168BESA+ application, or MAX6168BESA+ equivalent, key selection criteria include initial output tolerance, thermal drift performance over industrial temperature range, load regulation (0.5–0.9mV/mA sourcing), supply current stability (100–120µA typ), and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6168BESA+ is a three-terminal, internally compensated series-mode voltage reference using proprietary curvature-correction circuitry and laser-trimmed thin-film resistors. Its BiCMOS process enables ultra-low quiescent current (100µA typ) with only 3.4–8.0µA/V supply-voltage variation - eliminating external compensation capacitors and reducing board area versus shunt references.
It delivers 5mA sourcing capability at 0.9mV/mA load regulation and 2mA sinking at 1.5–4mV/mA, supports stable operation with ≥1µF capacitive loads, and achieves 78dB ripple rejection at 120Hz - making it suitable for precision analog signal chains where supply noise and thermal drift must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±5mV at +25°C - ensures accurate scaling for 1.8V-domain ADCs and DACs without calibration. |
| Temp Coefficient | 4–10ppm/°C max - limits output drift to ≤180µV over –40°C to +85°C span. |
| Dropout Voltage | 50–200mV at 1mA - enables operation from as low as 2.0V supply in battery-powered systems. |
| Quiescent Current | 100–120µA typ - draws <120µA across full input range, minimizing battery drain. |
| Load Regulation | 0.5–0.9mV/mA (source), 1.5–4mV/mA (sink) - maintains tight output stability under dynamic load conditions. |
| Noise (0.1–10Hz) | 22µVp-p - low flicker noise critical for high-resolution data acquisition. |
| Ripple Rejection | 78dB at 120Hz - suppresses AC line noise in mixed-signal power supplies. |
Pinout & Package
MAX6168BESA+ is housed in an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, lead-free). Pins 1, 3, 5, 7, and 8 are No Connect (N.C.), not internally bonded. Functional terminals are limited to IN (Pin 2), GND (Pin 4), and OUT (Pin 6).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Input voltage supply terminal | Accepts 2.0V to 12.6V; requires optional 0.1µF ceramic bypass capacitor near pin for optimal line-transient response. |
| GND (Pin 4) | Reference ground connection | Common return path for input, output, and internal bandgap core; must be low-impedance for accuracy. |
| OUT (Pin 6) | Precision voltage reference output | Delivers regulated 1.800V; stable with ≥1µF capacitive load; no external compensation required. |
| Pins 1,3,5,7,8 | No Connection | Not bonded internally - must remain unconnected on PCB; floating or grounded per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±5mV initial accuracy and 4–10ppm/°C tempco without post-package trimming. |
| Proprietary curvature-correction circuit | Minimizes parabolic error across temperature, improving worst-case drift vs. standard bandgap references. |
| No external compensation capacitor required | Reduces BOM count and PCB footprint - critical for compact portable designs like handheld DMMs. |
| Stable with ≥1µF output capacitance | Allows use of standard bulk ceramic or tantalum caps for improved transient response without oscillation risk. |
| Supply-current independence from VIN | ΔIIN/ΔVIN ≤ 8.0µA/V ensures consistent 100–120µA draw regardless of input voltage variation. |
Applications
| Portable Battery-Powered Systems | Notebook Computers |
|---|---|
Use Scenario: Powering 16-bit SAR ADCs in handheld multimeters with single-cell Li-ion (3.0–4.2V) supply. IC Role / Device Role / Timing Role: Provides stable 1.800V reference for ADC full-scale calibration and ratiometric measurements. Use Value: ±5mV initial accuracy and 10ppm/°C max drift ensure <0.02% measurement error across operating temperature. | Use Scenario: Biasing precision current-sense amplifiers in CPU voltage regulator monitoring circuits. IC Role / Device Role / Timing Role: Supplies accurate 1.800V reference for gain-setting resistors in high-side current sensing. Use Value: Low 22µVp-p (0.1–10Hz) noise prevents offset drift in µV-level sense voltage digitization. |
| PDAs, GPS, DMMs | Cellular Phones |
Use Scenario: Reference source for RF front-end DACs in GPS receiver baseband ICs requiring low-phase-noise clock synthesis. IC Role / Device Role / Timing Role: Generates clean 1.800V reference for DAC biasing, directly impacting SFDR performance. Use Value: 78dB PSRR at 120Hz rejects switching noise from PMICs, preserving DAC spectral purity. | Use Scenario: Calibration reference for battery fuel-gauge ICs measuring cell voltage with ±1mV resolution. IC Role / Device Role / Timing Role: Serves as primary voltage reference for coulomb counter ADC inputs. Use Value: 100µA typical supply current extends standby time; 200mV dropout enables operation down to 2.0V battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF198GS | 1.8V output, ±2mV initial accuracy, 3ppm/°C max tempco, 125µA IQ, SO-8 package | Higher accuracy and lower drift, but higher quiescent current and no sink capability | Select REF198GS when tighter initial tolerance and thermal stability outweigh ultra-low IQ requirements. |
| ADR3418ARJZ-R7 | 1.8V output, ±2mV initial accuracy, 5ppm/°C max tempco, 120µA IQ, SOT-23-5 package | Same accuracy/drift specs but smaller SOT-23 footprint and no sink current support | Choose ADR3418ARJZ-R7 for space-constrained designs where 2mA sink capability is unnecessary. |
Compared with REF198GS and ADR3418ARJZ-R7, MAX6168BESA+ uniquely combines 2mA sink current, 100µA typical supply current, and SO-8 compatibility - enabling robust reference buffering and low-power operation in industrial-grade portable systems where load transients and battery life are critical.
Availability
MAX6168BESA+ is available at Aetrix Electronics and suitable for portable battery-powered systems, notebook computers, PDAs/GPS/DMMs, and cellular phones requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for MAX6168BESA+ 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 and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX6161–MAX6168 family was engineered specifically for high-accuracy, low-power voltage referencing in space- and energy-constrained systems - emphasizing micropower operation, low dropout, and elimination of external compensation components.
FAQ
What is the output voltage tolerance and temperature coefficient of MAX6168BESA+?
MAX6168BESA+ provides a nominal 1.800V output with ±5mV initial accuracy at +25°C and a maximum temperature coefficient of 10ppm/°C over –40°C to +85°C. These values are specified per the "box method" and guarantee worst-case drift performance across the full industrial temperature range - critical for uncalibrated precision measurement systems.
Does MAX6168BESA+ require an external output capacitor for stability?
No, MAX6168BESA+ is internally compensated and does not require an external output capacitor for frequency stability. However, adding ≥1µF ceramic capacitance improves transient response during load steps - a design choice based on system dynamics, not stability necessity. This eliminates mandatory passive components in space-critical layouts.
What is the minimum input voltage required for MAX6168BESA+ to maintain regulation?
MAX6168BESA+ requires a minimum input voltage of VOUT + 0.2V = 2.0V to maintain regulation at 1mA load. Its dropout voltage is specified as 50–200mV (max) at 1mA, allowing reliable operation from single-cell Li-ion (3.0–4.2V) or dual-cell alkaline supplies without headroom裕度 concerns.
Can MAX6168BESA+ both source and sink load current?
Yes, MAX6168BESA+ can source up to 5mA and sink up to 2mA of load current. Its sourcing load regulation is 0.5–0.9mV/mA, and sinking regulation is 1.5–4mV/mA - enabling direct driving of reference buffers, op-amp bias networks, or small logic interfaces without external active circuitry.
What is the supply current behavior of MAX6168BESA+ across its input voltage range?
MAX6168BESA+ draws 100–120µA typical quiescent current, varying by only 3.4–8.0µA/V across its 2.0–12.6V input range. This near-constant supply current - unlike shunt references whose bias depends on VIN - maximizes battery efficiency and simplifies power budgeting in wide-input-voltage applications.
MAX6168BESA+ 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):
- 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+ FAQ
1.How can I place an order for MAX6168BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6168BESA+ 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+ reliable?
The price and inventory of MAX6168BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6168BESA+ is usually 5 days.
3.What payment methods are accepted for MAX6168BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6168BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6168BESA+?
MAX6168BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6168BESA+ 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+?
For technical support, including MAX6168BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6168BESA+ requirements.
6.How does Aetrix verify that MAX6168BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6168BESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6168BESA+?
All MAX6168BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6168BESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX6168BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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