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Analog Devices Inc./Maxim Integrated MAX6166AESA
- Part No.:
- MAX6166AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6166AESA.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,365
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Product details
Overview
MAX6166AESA from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 2.500V output with ±2mV initial accuracy and 5ppm/°C max temperature coefficient over -40°C to +85°C. It sources up to 5mA, sinks 2mA, operates down to VOUT + 200mV input, and draws only 100µA typical supply current-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6166AESA datasheet, MAX6166AESA pinout, MAX6166AESA application, or MAX6166AESA equivalent, key selection criteria include dropout voltage at 1mA (50–200mV), load regulation (0.5–0.9mV/mA sourcing), noise (27µVp-p @ 0.1Hz–10Hz), ripple rejection (76dB @ 120Hz), and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6166AESA uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve its 5ppm/°C max TCVOUT and ±2mV initial accuracy. Its internal compensation eliminates need for external capacitors, enabling stable operation with 1µF capacitive loads while maintaining 0.1% turn-on settling in 115µs (COUT = 50pF).
As a three-terminal series-mode reference, it features supply-current independence (ΔIIN/ΔVIN ≤ 8µA/V) and no external bias resistor-unlike shunt references-reducing wasted current and improving battery efficiency in low-voltage systems operating from 2.7V to 12.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2mV at +25°C - ensures precise full-scale calibration for 12-bit+ SAR ADCs without trimming |
| Temp Coefficient | ≤5ppm/°C (max) - limits drift to <±0.3mV over -40°C to +85°C, critical for field-deployed sensors |
| Dropout Voltage | 50–200mV at 1mA load - enables operation from 2.7V supply in 3.3V systems with margin |
| Quiescent Current | 100µA typical - extends battery life >1 year in 10µA sleep-cycle IoT nodes |
| Noise (0.1–10Hz) | 27µVp-p - contributes <0.01 LSB error in 2.5V-referenced 16-bit ADCs |
| Ripple Rejection | 76dB @ 120Hz - suppresses AC line noise in offline-powered test equipment |
| Load Regulation | 0.5–0.9mV/mA sourcing - maintains stability across dynamic sensor excitation currents |
Pinout & Package
MAX6166AESA is housed in an 8-pin SO (Small Outline) package with exposed pad option not specified; pins 1, 3, 5, 7, and 8 are No Connect (N.C.), pin 2 is IN, pin 4 is GND, and pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Input Voltage Supply | Accepts 2.7V–12.6V; must be decoupled with 0.1µF ceramic capacitor for optimal line transient response |
| 4 (GND) | Analog Ground Reference | Low-impedance return path for reference output; requires solid plane connection to minimize noise coupling |
| 6 (OUT) | Precision Voltage Output | Delivers 2.500V ±2mV; stable with 0–1µF capacitive loads-no external compensation required |
| 1,3,5,7,8 (N.C.) | No Connection | Not internally bonded; must remain unconnected on PCB to avoid parasitic coupling or latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±2mV initial accuracy and 5ppm/°C tempco without post-package trimming |
| Internally compensated architecture | Eliminates need for external stabilization capacitor-saves 2–3mm² board area in wearables |
| Supply-current independence | ΔIIN/ΔVIN ≤ 8µA/V ensures constant 100µA draw across 2.7–12.6V input range |
| Low-output-impedance design | Supports 5mA sourcing and 2mA sinking while maintaining <1mV load regulation error |
| Stable with 1µF capacitive loads | Enables direct drive of ADC sample-and-hold capacitors without oscillation or overshoot |
Applications
| Portable Battery-Powered Systems | High-Accuracy Data Acquisition |
|---|---|
Use Scenario: Powering 16-bit sigma-delta ADCs in handheld multimeters with single-cell Li-ion (3.0–4.2V) supply. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC full-scale calibration and ratiometric sensor measurements. Use Value: ±2mV initial accuracy and 5ppm/°C tempco ensure <0.02% total unadjusted error over temperature-meeting Class I DMM specs. | Use Scenario: Biasing precision op-amps and DACs in automated test equipment requiring sub-LSB stability. IC Role / Device Role / Timing Role: Serves as master reference for multi-channel 24-bit ADC subsystems with shared reference distribution. Use Value: 27µVp-p low-frequency noise and 76dB ripple rejection prevent spurious tones from corrupting spectral analysis results. |
| Notebook Computer Power Monitoring | Industrial Sensor Signal Conditioning |
Use Scenario: Monitoring core voltage rails (e.g., CPU VDD) via ADC in laptop EC firmware with tight thermal constraints. IC Role / Device Role / Timing Role: Supplies reference for rail telemetry ADCs operating in ambient temperatures up to +85°C. Use Value: 100µA quiescent current minimizes self-heating, preserving measurement accuracy in thermally isolated EC modules. | Use Scenario: Exciting 350Ω strain gauges in load cells with constant-current source derived from MAX6166AESA output. IC Role / Device Role / Timing Role: Generates ultra-stable excitation voltage for Wheatstone bridge completion and ratiometric readout. Use Value: 0.5–0.9mV/mA load regulation ensures <0.04% gain error across full 0–20mA sensor current range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5V output, 3ppm/°C max tempco, 100µA IQ, SO-8 - tighter tempco but higher cost and longer lead time | Better suited for metrology-grade instruments requiring <0.1ppm/°C long-term drift | Select REF5025IDR when tempco <3ppm/°C is mandatory and budget allows premium pricing |
| ADR3425ARJZ-R7 | 2.5V output, 10ppm/°C max tempco, 120µA IQ, SOT-23-5 - smaller footprint but looser accuracy (±3mV) | Ideal for space-constrained consumer devices where 0.1% system accuracy suffices | Choose ADR3425ARJZ-R7 for size-critical designs accepting ±3mV initial error and relaxed tempco |
Compared with REF5025IDR and ADR3425ARJZ-R7, MAX6166AESA delivers the optimal balance of 5ppm/°C tempco, ±2mV accuracy, SO-8 compatibility, and 100µA supply current-making it the preferred choice for industrial portable instruments needing proven reliability and broad temperature support without premium cost.
Availability
MAX6166AESA is available at Aetrix Electronics and suitable for portable battery-powered systems, high-accuracy data acquisition, notebook computer power monitoring, and industrial sensor signal conditioning requiring stable component supply and long-term parametric consistency.
Supply support for MAX6166AESA 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 battery-operated and space-constrained systems-emphasizing micropower operation, low dropout, and elimination of external compensation components.
FAQ
What is the maximum load current that MAX6166AESA can source while maintaining specification?
MAX6166AESA can source up to 5mA while maintaining its specified load regulation of 0.5–0.9mV/mA and output voltage accuracy. At 5mA load, the output voltage change remains within ±4.5mV of nominal 2.500V under all conditions across the -40°C to +85°C temperature range, as confirmed by Electrical Characteristics table on page 5 of the datasheet.
Does MAX6166AESA require an external output capacitor for stability?
No, MAX6166AESA does not require an external output capacitor for stability due to its internally compensated architecture. The device remains stable with 0–1µF capacitive loads, and the Applications Information section explicitly states "devices in the MAX6161 family do not require an output capacitor for frequency stability." This eliminates board area and BOM cost associated with external compensation.
What is the minimum input voltage required for MAX6166AESA to regulate at 2.500V output?
The minimum input voltage for MAX6166AESA is VOUT + 200mV = 2.7V, per the General Description and Electrical Characteristics table (Note 4). Dropout voltage is specified as 50–200mV at 1mA load, and the absolute minimum input is guaranteed down to VOUT + 0.2V across the full operating temperature range, enabling use in 3.3V systems with significant supply droop.
How does the supply current of MAX6166AESA vary with input voltage?
MAX6166AESA exhibits supply-current independence: its quiescent current varies by only ≤8µA/V across the input range. At VIN = 2.7V, IIN is ~100µA; at VIN = 12.6V, it rises to ≤180µA (100µA + 8µA/V × 9.9V). This behavior is confirmed in the INPUT CHARACTERISTICS table (page 5) and contrasts sharply with shunt references whose current scales linearly with VIN.
Is MAX6166AESA RoHS-compliant and lead-free?
Yes, MAX6166AESA is RoHS-compliant and lead-free. The Ordering Information table on page 15 explicitly lists "MAX6166_ESA+" with "+" denoting a lead(Pb)-free/RoHS-compliant package, and the package code "S8+2" confirms RoHS status per Maxim's standard notation. No leaded version is offered for this part number.
MAX6166AESA 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:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.08%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 27µVp-p
- Noise - 10Hz to 10kHz:
- 30µVrms
- Voltage - Input:
- 2.7V ~ 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
MAX6166AESA FAQ
1.How can I place an order for MAX6166AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6166AESA 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 MAX6166AESA reliable?
The price and inventory of MAX6166AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6166AESA is usually 5 days.
3.What payment methods are accepted for MAX6166AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6166AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6166AESA?
MAX6166AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6166AESA 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 MAX6166AESA?
For technical support, including MAX6166AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6166AESA requirements.
6.How does Aetrix verify that MAX6166AESA is sourced from the original manufacturer or authorized distributors?
All MAX6166AESA 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 MAX6166AESA meets industry standards.
7.What is the process for return or replacement of MAX6166AESA?
All MAX6166AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6166AESA, 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 MAX6166AESA part is unused and in its original packaging.
Return procedure for MAX6166AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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