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Analog Devices Inc./Maxim Integrated MAX6166AESA+T
- Part No.:
- MAX6166AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6166AESA+T.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
MAX6166AESA+T 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 from (VOUT + 200mV) to 12.6V, and draws only 100μA typical supply current-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6166AESA+T datasheet, MAX6166AESA+T pinout, MAX6166AESA+T application, or MAX6166AESA+T equivalent, key selection criteria include its 2.5V output tolerance, ultra-low 5ppm/°C drift, dropout voltage ≤200mV at 1mA, 0.9mV/mA load regulation, and SO-8 package compatibility with space-constrained, battery-powered precision analog systems.
Technical Context
The MAX6166AESA+T employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve 5ppm/°C max temperature coefficient and ±2mV initial accuracy. Its internal compensation eliminates need for external capacitors, and its supply current varies by only 3.2–8.0μA/V across input voltage range.
It functions as a three-terminal series-mode reference with ground-referenced output, supporting sourcing and sinking loads without external biasing components. The device maintains stability with ≥1μF capacitive loads and exhibits 27μVP-P (0.1Hz–10Hz) noise and 76dB ripple rejection at 120Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2mV at +25°C - ensures precise full-scale calibration for 12-bit+ ADCs without trimming |
| Temp Coefficient | ≤5ppm/°C max - limits output drift to <±0.9mV over full -40°C to +85°C industrial range |
| Dropout Voltage | ≤200mV at 1mA load - enables operation from 2.7V supply in 3V systems with margin |
| Load Regulation | 0.5–0.9mV/mA sourcing - holds output within ±4.5mV across full 5mA load range |
| Supply Current | 100–120μA typical - extends battery life in always-on sensor nodes and portable DMMs |
| Noise (0.1–10Hz) | 27μVP-P - contributes <0.01 LSB error in 2.5V-referenced 16-bit ADC conversions |
| Ripple Rejection | 76dB at 120Hz - suppresses AC line noise coupling into precision measurement front-ends |
Pinout & Package
MAX6166AESA+T 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.), internally unconnected. Pin 2 is IN (input voltage), Pin 4 is GND (ground reference), and Pin 6 is OUT (precision 2.5V reference output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 (IN) | Input Supply Terminal | Accepts 2.7V–12.6V; must be decoupled with 0.1μF ceramic capacitor for optimal line-transient response |
| Pin 4 (GND) | Analog Ground Reference | Low-impedance return path for reference output and internal bandgap core; requires solid PCB ground plane |
| Pin 6 (OUT) | Precision Output Terminal | Delivers regulated 2.500V; stable with 0–1μF capacitive loads; no external compensation required |
| Pins 1,3,5,7,8 | No Connection | Not bonded or connected internally; may be left floating or tied to GND for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enable ±2mV initial accuracy and 5ppm/°C tempco without post-package trimming |
| Proprietary curvature-correction circuit | Compensates second-order thermal effects, achieving flat VOUT vs. temperature behavior |
| Internally compensated architecture | Eliminates need for external output capacitor-reduces BOM count and saves board area |
| Supply-current independence | Draws only 100μA ±8μA/V across 2.7–12.6V input-maximizes efficiency in wide-input battery systems |
| Low-output-impedance design | Sustains 5mA source/2mA sink while maintaining <1mV regulation error-drives ADC references directly |
Applications
| Portable Digital Multimeters (DMMs) | Industrial Data Acquisition Systems |
|---|---|
Use Scenario: High-resolution handheld DMM requiring stable 2.5V reference for 16-bit sigma-delta ADC and autoranging front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and scaling circuitry. Use Value: ±2mV initial accuracy and 5ppm/°C drift ensure <0.01% measurement repeatability across operating temperature range. | Use Scenario: Modular PLC analog input module measuring 4–20mA sensor signals with 24-bit ADC resolution. IC Role / Device Role / Timing Role: Precision reference for ADC and programmable gain amplifier (PGA) offset calibration. Use Value: 27μVP-P low-frequency noise prevents quantization errors in slow-sampling, high-dynamic-range measurements. |
| Battery-Powered IoT Sensor Nodes | Medical Instrumentation (ECG, Pulse Oximetry) |
Use Scenario: Ultra-low-power environmental sensor node (temperature/humidity/pressure) operating on coin-cell battery for >5 years. IC Role / Device Role / Timing Role: Reference for SAR ADC sampling sensor outputs and powering low-noise signal conditioning stages. Use Value: 100μA quiescent current and 200mV dropout enable direct use of declining battery voltage (2.7–3.3V) without DC-DC conversion loss. | Use Scenario: Portable ECG monitor requiring sub-microvolt-level baseline stability and minimal power consumption. IC Role / Device Role / Timing Role: Reference for precision instrumentation amplifiers and ADC in analog front-end (AFE). Use Value: 125ppm hysteresis and 80ppm/1000hr long-term stability ensure consistent calibration between clinical sessions without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025AIDR | 2.5V output, 3ppm/°C max tempco, 50μA supply current, SO-8 package | Lower drift and current but limited 2mA output drive; requires external 1μF output cap for stability | Preferred where ultra-low drift dominates over load drive capability and board area constraints |
| ADR4525BRZ | 2.5V output, 3ppm/°C max tempco, 950μA supply current, SO-8 package | Higher supply current and cost; superior PSRR (120dB) and lower noise (1.2μVRMS) | Selected when system-level power supply noise is severe and higher quiescent budget is acceptable |
Compared with REF5025AIDR and ADR4525BRZ, MAX6166AESA+T offers balanced performance: best-in-class 5mA output drive and capacitor-free operation at moderate supply current, making it optimal for compact, battery-powered systems needing both precision and robust load handling.
Availability
MAX6166AESA+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and medical sensor applications requiring stable component supply, long-term calibration integrity, and RoHS-compliant packaging.
Supply support for MAX6166AESA+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 voltage referencing in space- and energy-constrained systems-emphasizing micropower operation, low dropout, and elimination of external passive components.
FAQ
What is the guaranteed initial accuracy of MAX6166AESA+T over temperature?
The MAX6166AESA+T guarantees ±2mV initial accuracy at +25°C, with total output error-including temperature coefficient, line/load regulation, and hysteresis-remaining within ±5.5mV across the full -40°C to +85°C operating range per datasheet specifications. This ensures reliable 12-bit ADC reference performance without system-level calibration.
Does MAX6166AESA+T require an external output capacitor for stability?
No, MAX6166AESA+T is internally compensated and does not require an external output capacitor for stability. It remains stable with capacitive loads from 0 to 1μF. Adding a 1μF capacitor improves transient response during load steps but is optional-enabling minimalist BOMs in space-critical designs where MAX6166AESA+T is deployed.
What is the maximum load current MAX6166AESA+T can source and sink?
MAX6166AESA+T can source up to 5mA and sink up to 2mA while maintaining specified output voltage accuracy and regulation. Load regulation is characterized at 0.5–0.9mV/mA for sourcing and 1.6–5mV/mA for sinking, ensuring predictable performance under dynamic load conditions encountered in ADC reference and biasing applications using MAX6166AESA+T.
How does the supply current of MAX6166AESA+T vary with input voltage?
MAX6166AESA+T exhibits supply current variation of only 3.2–8.0μA/V across its input voltage range (2.7V to 12.6V), resulting in near-constant 100–120μA draw. This supply independence-unlike shunt references-minimizes wasted current and maximizes battery runtime in systems where input voltage fluctuates, a key advantage of MAX6166AESA+T in portable designs.
Is MAX6166AESA+T compatible with standard SO-8 footprints and reflow profiles?
Yes, MAX6166AESA+T uses a standard 8-pin SO package (S8+2 outline, land pattern 90-0096) and is RoHS-compliant with lead-free terminations. It supports JEDEC J-STD-020D reflow profiles, including peak temperatures up to +300°C for 10 seconds. The exposed pad variant simplifies thermal management without requiring footprint changes from legacy SO-8 designs using MAX6166AESA+T.
MAX6166AESA+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):
- 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+T FAQ
1.How can I place an order for MAX6166AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6166AESA+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 MAX6166AESA+T reliable?
The price and inventory of MAX6166AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6166AESA+T is usually 5 days.
3.What payment methods are accepted for MAX6166AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6166AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6166AESA+T?
MAX6166AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6166AESA+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 MAX6166AESA+T?
For technical support, including MAX6166AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6166AESA+T requirements.
6.How does Aetrix verify that MAX6166AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6166AESA+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 MAX6166AESA+T meets industry standards.
7.What is the process for return or replacement of MAX6166AESA+T?
All MAX6166AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6166AESA+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 MAX6166AESA+T part is unused and in its original packaging.
Return procedure for MAX6166AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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