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Analog Devices Inc./Maxim Integrated MAX6161AESA
- Part No.:
- MAX6161AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6161AESA.pdf
- Description:
- IC VREF SERIES 0.16% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,632
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Product details
Overview
MAX6161AESA from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering 1.25V output with ±2mV initial accuracy and 10ppm/°C max temperature coefficient over -40°C to +85°C. It sources up to 4mA load current, features 200mV max dropout at 1mA, draws only 100μA typical quiescent current, and operates from (VOUT + 200mV) to 12.6V input-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6161AESA datasheet, MAX6161AESA pinout, MAX6161AESA application, or MAX6161AESA equivalent, key selection criteria include initial output tolerance, temperature drift performance, supply-current stability across VIN, dropout behavior under load, and compatibility with space-constrained, battery-powered systems requiring stable 1.25V references.
Technical Context
The MAX6161AESA employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve its 10ppm/°C max TCVOUT and ±2mV initial accuracy. Its BiCMOS process enables internal compensation, eliminating need for external capacitors while maintaining stability with ≥1μF capacitive loads.
As a three-terminal series-mode reference, it delivers supply-current independence (8μA/V max variation), 0.9mV/mA sourcing load regulation, and 2.5mV/mA sinking load regulation-distinguishing it from shunt-mode alternatives that waste current and require external biasing resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.250V ±2mV at +25°C - ensures precise ADC full-scale calibration without trimming |
| Temp Coefficient | 10ppm/°C max - limits output drift to ≤1.25mV over full -40°C to +85°C range |
| Quiescent Current | 100μA typical - enables >1-year battery life in 10μA-systems with 200mAh coin cell |
| Dropout Voltage | 200mV max at 1mA - supports operation from 1.45V supply, critical for single-cell Li-ion systems |
| Load Regulation | 0.9mV/mA sourcing - maintains <3.6mV error across full 0–4mA load range |
| Noise (0.1–10Hz) | 20μVP-P - minimizes quantization uncertainty in 16-bit+ SAR ADC applications |
| Line Regulation | 150μV/V max - rejects supply ripple without additional filtering in noisy DC-DC environments |
Pinout & Package
MAX6161AESA is housed in an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, lead-free). Pins 1,3,5,7,8 are No Connect (N.C.); Pin 2 is IN (input voltage); Pin 4 is GND; Pin 6 is OUT (1.25V reference output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Input voltage terminal | Accepts 1.45V–12.6V supply; requires 0.1μF ceramic bypass near pin for optimal line transient rejection |
| GND (Pin 4) | Ground reference | Common return path for input, output, and internal bandgap core; must be low-impedance |
| OUT (Pin 6) | Reference output | Delivers stable 1.25V; capable of sourcing 4mA or sinking 2mA; stable with 1μF capacitive load |
| N.C. (Pins 1,3,5,7,8) | No connection | Not internally bonded; may be left floating or tied to GND for mechanical stability-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±2mV initial accuracy and 10ppm/°C tempco without post-package trimming |
| Internally compensated architecture | Eliminates need for external compensation capacitor-saves PCB area in compact designs |
| Supply-current independence | 100μA typical draw varies ≤8μA/V across input range-maximizes battery efficiency |
| Low-output-impedance design | Supports fast load transients (50μs turn-on to 0.1%) and stable operation into 1μF loads |
| Curvature-correction circuit | Compensates second-order thermal effects in bandgap core-reduces parabolic drift |
Applications
| Portable DMM Front-End | Medical ECG Signal Chain |
|---|---|
Use Scenario: High-resolution digital multimeter measuring mV-level signals with auto-ranging and 5½-digit display. IC Role / Device Role / Timing Role: Provides 1.25V reference for 24-bit delta-sigma ADC and programmable gain amplifier offset calibration. Use Value: ±2mV initial accuracy and 10ppm/°C drift ensure <0.01% measurement error across operating temperature without recalibration. | Use Scenario: Battery-powered electrocardiogram monitor acquiring microvolt-level cardiac signals. IC Role / Device Role / Timing Role: Supplies ultra-low-noise 1.25V reference for analog front-end PGA and 16-bit SAR ADC sampling at 1kSPS. Use Value: 20μVP-P (0.1–10Hz) noise and 100μA quiescent current extend single-AA battery life beyond 6 months. |
| Industrial Data Logger | Smart Sensor Transmitter |
Use Scenario: Ruggedized environmental logger recording temperature, humidity, and pressure every 10 seconds. IC Role / Device Role / Timing Role: Serves as master reference for multi-channel 16-bit ADC converting RTD, thermistor, and bridge sensor outputs. Use Value: 200mV dropout allows direct operation from 1.8V LDO; long-term stability of 115ppm/1000hr ensures calibration validity over 12-month deployments. | Use Scenario: 4–20mA loop-powered smart pressure transmitter with HART communication. IC Role / Device Role / Timing Role: Generates precision 1.25V reference for sensor excitation and ADC conversion in ultra-low-power sleep/wake cycles. Use Value: Supply-current independence (8μA/V) prevents reference error during 3.3V rail fluctuations caused by HART signal injection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF191GS | 1.25V output, ±1.5mV initial accuracy, 8ppm/°C max tempco, 125μA IQ, SO-8 package | Higher initial accuracy but higher quiescent current; requires 1μF output cap for stability | Select when tighter initial tolerance is prioritized over battery life; verify layout accommodates mandatory output capacitor |
| ADR3412ARJZ-R7 | 1.2V output (not 1.25V), ±1.2mV initial accuracy, 10ppm/°C max tempco, 120μA IQ, SOT-23-5 | Different output voltage; smaller package but lower max load current (3mA); no N.C. pins | Choose only if system can accommodate 1.2V reference and reduced sourcing capability; not drop-in compatible |
Compared with REF191GS and ADR3412ARJZ-R7, MAX6161AESA offers superior supply-current efficiency (100μA vs. ≥120μA) and true 1.25V output matching legacy ADC full-scale requirements, while avoiding mandatory external capacitance-critical for miniaturized, high-density layouts.
Availability
MAX6161AESA is available at Aetrix Electronics and suitable for portable instrumentation, medical monitoring devices, and industrial data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6161AESA 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 passive components.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6161AESA?
The MAX6161AESA provides a nominal 1.25V output with ±2mV initial accuracy at +25°C and a maximum temperature coefficient of 10ppm/°C over the full -40°C to +85°C operating range. These specifications are guaranteed per the datasheet's "Electrical Characteristics-MAX6161" table and reflect laser-trimmed performance using thin-film resistors and curvature correction.
Does the MAX6161AESA require an external output capacitor for stability?
No, the MAX6161AESA does not require an external output capacitor for frequency stability due to its internally compensated architecture. It remains stable with capacitive loads up to 1μF, though adding ≥0.1μF improves transient response during step-load changes-making it ideal for space-critical designs where board area is constrained.
What is the maximum load current the MAX6161AESA can source or sink?
The MAX6161AESA can source up to 4mA and sink up to 2mA of load current. This capability is specified in the "General Description" and confirmed in the "Electrical Characteristics-MAX6161" table under "Load Regulation" conditions. Exceeding these limits may degrade output accuracy or cause instability.
How does the supply current of the MAX6161AESA vary with input voltage?
The MAX6161AESA exhibits supply-current independence: its quiescent current is typically 100μA and varies by only 3.2–8.0μA/V across the input range (2.5V to 12.6V), as documented in the "INPUT CHARACTERISTICS" section. This behavior contrasts sharply with shunt-mode references and enables predictable power budgeting in variable-supply systems.
What is the dropout voltage specification for the MAX6161AESA at 1mA load?
The MAX6161AESA 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 its nominal value. This low dropout enables operation from supplies as low as 1.45V, supporting single-cell battery and ultra-low-voltage system designs.
MAX6161AESA 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):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.16%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- 15µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 150µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6161AESA FAQ
1.How can I place an order for MAX6161AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6161AESA 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 MAX6161AESA reliable?
The price and inventory of MAX6161AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6161AESA is usually 5 days.
3.What payment methods are accepted for MAX6161AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6161AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6161AESA?
MAX6161AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6161AESA 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 MAX6161AESA?
For technical support, including MAX6161AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6161AESA requirements.
6.How does Aetrix verify that MAX6161AESA is sourced from the original manufacturer or authorized distributors?
All MAX6161AESA 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 MAX6161AESA meets industry standards.
7.What is the process for return or replacement of MAX6161AESA?
All MAX6161AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6161AESA, 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 MAX6161AESA part is unused and in its original packaging.
Return procedure for MAX6161AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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