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Analog Devices Inc./Maxim Integrated MAX6125ESA
- Part No.:
- MAX6125ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6125ESA.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
The MAX6125ESA from Maxim Integrated is a precision 2.5V low-dropout, micropower, three-terminal voltage reference in an 8-pin SO package, featuring ±1% initial accuracy, 15ppm/°C typical temperature coefficient, and 200mV dropout-optimized for stable operation in 3V systems and battery-powered instrumentation.
For engineers reviewing the MAX6125ESA datasheet, MAX6125ESA pinout, MAX125ESA application, or MAX6125ESA equivalent, key selection criteria include output stability over temperature, supply current independence from input voltage, capacitive load tolerance up to 10nF, and compatibility with low-noise data-acquisition signal chains requiring tight DC accuracy.
Technical Context
The MAX6125ESA uses a bandgap-based reference core with internal trimming to achieve ±1% initial output accuracy at +25°C and guaranteed ≤50ppm/°C temperature coefficient across –40°C to +85°C. Its low 75µA quiescent current remains virtually independent of input voltage (2.7V to 12.6V), enabling extended battery life in portable systems.
It operates as a fixed-output, three-terminal shunt-like series reference: IN supplies power, OUT delivers regulated 2.5V, and GND provides return path. The device is stable without output capacitance and supports capacitive loads up to 10nF-eliminating need for external compensation in most DAC, ADC, and sensor biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±25mV at +25°C; ±50mV over –40°C to +85°C - ensures consistent ADC/DAC reference level across industrial temperature range |
| Initial Accuracy | ±1% - enables single-point calibration in mid-precision measurement systems without trimming |
| Tempco | 15ppm/°C typical, ≤50ppm/°C max - contributes <125µV drift over full temperature range for 2.5V output |
| Dropout Voltage | 200mV at 1mA load - allows operation from 2.7V supply while maintaining regulation in 3V systems |
| Supply Current | 75µA typical, ≤130µA over temperature - minimizes standby power in always-on sensor nodes |
| Line Regulation | 1–50µV/V - maintains output stability despite input rail variations common in battery discharge profiles |
| Load Regulation | 0.4–1.0mV/mA sourcing - supports direct driving of 1mA loads (e.g., op-amp inputs, SAR ADC references) |
| Noise (0.1–10Hz) | 15µVP-P - low enough for 16-bit+ data acquisition without additional filtering |
Pinout & Package
MAX6125ESA is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint. Pin 1 is marked by a beveled corner or dot; pins are numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 2.7V to 12.6V; must be ≥ (VOUT + 200mV) for regulation |
| 2 (N.C.) | No Connection | Not internally bonded; leave unconnected or tie to GND per layout best practice |
| 3 (N.C.) | No Connection | Not internally bonded; no electrical function |
| 4 (N.C.) | No Connection | Not internally bonded; not used in MAX6125 variant |
| 5 (OUT) | Reference Output | Delivers stable 2.5V; capable of sourcing/sinking up to 1mA |
| 6 (N.C.) | No Connection | Not internally bonded; no routing required |
| 7 (N.C.) | No Connection | Not internally bonded; unused in this family member |
| 8 (GND) | Ground Reference | Return path for supply and output current; requires low-impedance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Low 200mV dropout | Enables regulation from 2.7V supply in 3V systems-critical for Li-ion battery-powered devices operating down to end-of-discharge |
| 75µA supply current, VIN-independent | Eliminates battery current waste during voltage sag; extends runtime vs. two-terminal references requiring external resistor |
| Stable with 0–10nF capacitive loads | Removes need for output capacitor-simplifies layout and avoids instability risks in high-impedance sensor interfaces |
| 15ppm/°C typical tempco | Supports <1 LSB error in 16-bit systems over –40°C to +85°C without software compensation |
| ±1% initial accuracy | Reduces or eliminates factory calibration steps in cost-sensitive portable test equipment and IoT sensor modules |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-operated environmental monitors logging temperature, humidity, and pressure with 16-bit ADCs over multi-year deployments. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for successive-approximation ADCs and analog front-end amplifiers. Use Value: 75µA quiescent current and 200mV dropout extend battery life; 15ppm/°C tempco ensures measurement repeatability across seasonal ambient shifts. | Use Scenario: 4–20mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Supplies precision excitation voltage and ADC reference in isolated analog signal chains. Use Value: ±1% initial accuracy reduces calibration overhead; stability under capacitive loads simplifies interface to isolation amplifiers and current-sense resistors. |
| Medical Wearables | Test & Measurement Front Ends |
Use Scenario: ECG and pulse oximetry patches requiring ultra-low-power, high-accuracy analog signal conditioning. IC Role / Device Role / Timing Role: Serves as reference for low-noise instrumentation amplifiers and delta-sigma ADCs. Use Value: 15µVP-P (0.1–10Hz) noise enables clean biopotential acquisition; 8-pin SO package supports compact, thermally stable layouts. | Use Scenario: Benchtop multimeters and portable oscilloscope channels needing calibrated DC voltage references. IC Role / Device Role / Timing Role: Delivers traceable 2.5V reference for auto-zeroing circuits and ratiometric scaling in digital multimeter ASICs. Use Value: Thermal hysteresis ≤80ppm ensures repeatable readings after thermal cycling; line regulation ≤50µV/V rejects power-supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA IQ, SOT23-3 package | Higher accuracy but lower tempco guarantee; smaller footprint but no SO option | Select for tighter initial tolerance where board space is constrained and SO packaging is not required |
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C max tempco, 120µA IQ, SOT23-6 package | Superior accuracy and tempco, but higher supply current and different pinout | Choose when sub-0.1% system-level DC accuracy is mandatory and increased IQ is acceptable |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX6125ESA offers the only 8-pin SO option in this performance tier, delivering balanced accuracy, ultra-low IQ, and proven stability with capacitive loads-making it optimal for industrial PCBs requiring serviceability, thermal mass, and legacy footprint compatibility.
Availability
MAX6125ESA is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and industrial data-acquisition systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6125ESA 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 industrial, medical, and communications applications-with emphasis on low-power, high-accuracy signal conditioning.
The MAX61xx family was engineered specifically for micropower, low-dropout voltage reference needs in space- and energy-constrained systems-prioritizing supply-current independence, wide input range, and robust capacitive-load stability over raw accuracy.
FAQ
What is the maximum input voltage rating for the MAX6125ESA?
The MAX6125ESA has an absolute maximum input voltage of +13.5V relative to GND. Its recommended operating supply range is 2.7V to 12.6V. Exceeding +13.5V may cause permanent damage. For reliable 2.5V regulation, input must remain ≥2.7V (i.e., VOUT + 200mV dropout). The MAX6125ESA datasheet specifies continuous operation up to 12.6V with derated power dissipation above +70°C ambient.
Does the MAX6125ESA require an output capacitor for stability?
No, the MAX6125ESA does not require an output capacitor. It is explicitly characterized and guaranteed stable with capacitive loads from 0nF to 10nF. Adding capacitance beyond 10nF may degrade transient response or cause oscillation. If used for charge reservoir functions (e.g., decoupling a DAC input), total output capacitance must stay ≤10nF to maintain specified settling time and noise performance.
Can the MAX6125ESA drive a 1mA load continuously?
Yes, the MAX6125ESA is rated to source and sink up to 1mA continuously while maintaining output regulation within specifications. Load regulation is specified as 0.4–1.0mV/mA for sourcing and 1.15–10mV/mA for sinking across temperature. At 1mA, worst-case deviation remains within ±10mV-well within its ±50mV total accuracy window over –40°C to +85°C.
What is the thermal hysteresis specification for the MAX6125ESA?
The MAX6125ESA exhibits ≤80ppm thermal hysteresis, measured across multiple temperature cycles from –40°C to +85°C and back. This value reflects residual output voltage shift after thermal cycling-not drift during ramp-and directly impacts repeatability in field-deployed instruments subject to ambient cycling. It is specified in the MAX6125/MAX6141/MAX6145/MAX6150/MAX6160 datasheet Revision 2 (August 2016).
Is the MAX6125ESA pin-compatible with other members of the MAX61xx family in SO-8 packages?
Yes, all SO-8 variants-including MAX6125ESA, MAX6141ESA, MAX6145ESA, MAX6150ESA, and MAX6160ESA-share identical pinouts: Pin 1 = IN, Pins 2–4 = N.C., Pin 5 = OUT, Pins 6–7 = N.C., Pin 8 = GND. This allows drop-in replacement across output voltages (2.5V/4.096V/4.5V/5.0V/adjustable) without PCB redesign, provided input voltage and load requirements are met for each variant.
MAX6125ESA 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:
- 1 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 15µVp-p
- Noise - 10Hz to 10kHz:
- 500µVp-p
- Voltage - Input:
- 2.7V ~ 12.6V
- Current - Supply:
- 130µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6125ESA FAQ
1.How can I place an order for MAX6125ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6125ESA 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 MAX6125ESA reliable?
The price and inventory of MAX6125ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6125ESA is usually 5 days.
3.What payment methods are accepted for MAX6125ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6125ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6125ESA?
MAX6125ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6125ESA 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 MAX6125ESA?
For technical support, including MAX6125ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6125ESA requirements.
6.How does Aetrix verify that MAX6125ESA is sourced from the original manufacturer or authorized distributors?
All MAX6125ESA 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 MAX6125ESA meets industry standards.
7.What is the process for return or replacement of MAX6125ESA?
All MAX6125ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6125ESA, 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 MAX6125ESA part is unused and in its original packaging.
Return procedure for MAX6125ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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