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Analog Devices Inc./Maxim Integrated MAX675ESA+
- Part No.:
- MAX675ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX675ESA+.pdf
- Description:
- IC VREF SERIES 0.15% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
MAX675ESA+ from Maxim Integrated is a precision +5V voltage reference IC with ±0.15% initial accuracy, 15ppm/°C temperature coefficient, and 10µVP-P low-frequency noise (0.1Hz–10Hz). It delivers stable reference output for high-resolution data converters and threshold detection circuits operating across –40°C to +85°C industrial temperature range in narrow SO-8 package.
For engineers reviewing the MAX675ESA+ datasheet, MAX675ESA+ pinout, MAX675ESA+ application, or MAX675ESA+ equivalent, key selection criteria include guaranteed 15ppm/°C tempco over full temperature range, trim-adjustable output (±150mV), load regulation of 0.001%/mA, short-circuit protection, and compatibility with REF02-based designs requiring extended temperature operation.
Technical Context
The MAX675ESA+ integrates a bandgap core with on-chip trimming to achieve ±7mV (±0.15%) initial output tolerance at +5.000V. Its temperature compensation uses internal circuitry to limit drift to 15ppm/°C over –40°C to +85°C, verified via the "box method" per datasheet Note 1.
It features dual functional outputs: Pin 5 (VOUT) provides the precision +5V reference, while Pin 3 (TEMP) supplies a proportional-to-absolute-temperature voltage (≈2.1mV/°C) usable for remote sensing. The TRIM pin (Pin 2) allows ±150mV adjustment using an external potentiometer without degrading tempco beyond +0.7ppm/°C per 100mV shift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +5.000V ±7mV (±0.15%) at TA = +25°C, enabling direct use in 12-bit+ ADC/DAC systems without calibration |
| Tempco | 15ppm/°C max (–40°C to +85°C), ensuring ≤±0.75mV total drift over full industrial range |
| Noise | 10µVP-P (0.1Hz–10Hz), minimizing quantization uncertainty in precision measurement front-ends |
| Load Regulation | 0.001%/mA, supporting stable output under varying DAC or comparator input currents up to 10mA |
| Quiescent Current | 750µA to 1400µA, allowing low-power operation in battery-backed instrumentation |
| Trim Range | ±150mV via external resistor, enabling binary-scaled references (e.g., 5.120V) without external amplification |
| Short-Circuit Duration | Indefinite to GND or VIN, permitting robust fault handling in regulator feedback loops |
Pinout & Package
MAX675ESA+ is housed in an 8-pin narrow SOIC (SO-8) package with standard 1.27mm pitch, footprint-compatible with industry-standard SO-8 layouts and reflow soldering profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference Output | Provides regulated +5V output; requires 0.1µF ceramic bypass capacitor to ground for stability |
| 2 (TRIM) | Output Adjustment | Accepts external 10kΩ potentiometer to shift VOUT by ±150mV; high-impedance input (≤50nA bias) |
| 3 (GND) | Analog Ground | Primary return path for reference current; must be connected to clean system AGND plane |
| 4 (N.C.) | No Connect | Internally unconnected; left floating or tied to GND per layout best practice |
| 5 (VIN) | Input Supply | Operates from +15V nominal (4V to 40V absolute max); regulates internally to derive reference |
| 6 (TEMP) | Temperature Sensor Output | Supplies ≈2.1mV/°C voltage proportional to die temperature; used for thermal monitoring or compensation |
| 7 (N.C.) | No Connect | Internally unconnected; no routing required |
| 8 (N.C.) | No Connect | Internally unconnected; no routing required |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed +5V Output | Guaranteed ±0.15% initial accuracy eliminates need for system-level trimming in production test |
| Low 10µVP-P Noise | Enables sub-LSB stability in 16-bit ADC applications without external filtering |
| Integrated TEMP Pin | Delivers calibrated 2.1mV/°C analog temperature signal-no external sensor or signal conditioning required |
| Short-Circuit Protection | Withstands indefinite output shorts to GND or VIN, preventing failure during power-up sequencing or fault events |
| REF02 Pin Compatibility | Direct PCB replacement for REF02 in existing designs, preserving layout and bill-of-materials continuity |
Applications
| Precision Calibration Standard | ±5V Dual Reference Generator |
|---|---|
Use Scenario: Benchtop digital multimeter requiring traceable 5.000V reference for self-calibration routines. IC Role / Device Role / Timing Role: Primary voltage reference source for ADC front-end and DAC feedback loop. Use Value: ±0.15% initial accuracy and 15ppm/°C tempco ensure <±1.5 LSB error over full temperature range in 16-bit systems. | Use Scenario: Industrial PLC analog I/O module needing matched +5V and –5V rails for bipolar signal conditioning. IC Role / Device Role / Timing Role: Positive reference generator; paired with MAX400 op-amp to invert and scale for negative rail. Use Value: TRIM pin enables precise 5.000V setting, while TEMP pin monitors thermal drift to dynamically correct offset in real time. |
| Current Source Reference | Precision Temperature Transducer |
Use Scenario: Loop-powered 4–20mA transmitter where reference stability defines output accuracy. IC Role / Device Role / Timing Role: Stable voltage reference for current-setting resistor network (e.g., 5V/5kΩ = 1mA). Use Value: Load regulation of 0.001%/mA ensures <0.01% current error across full 4–20mA span despite supply variations. | Use Scenario: Remote environmental sensor node measuring ambient temperature with ±0.5°C accuracy over –40°C to +85°C. IC Role / Device Role / Timing Role: On-die temperature sensor with linear 2.1mV/°C output referenced to absolute zero. Use Value: Eliminates external thermistor or RTD, reducing BOM count and calibration complexity while maintaining ±1°C max error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02CP | Same pinout, ±0.2% initial accuracy, 25ppm/°C tempco, 0°C to +70°C only | Limited to commercial temperature range; higher drift reduces suitability for industrial field instruments | Select when cost sensitivity outweighs extended temp range and tighter spec requirements |
| ADR445BRZ | 5.000V, ±0.04% initial, 3ppm/°C, SO-8, but requires 12V min input and has 4.5mA quiescent current | Superior accuracy and stability, but higher supply current limits battery life in portable devices | Select when ultimate precision justifies increased power and cost; not drop-in due to different input voltage and current profile |
Compared with REF02CP and ADR445BRZ, the MAX675ESA+ offers the optimal balance of industrial temperature support, moderate power consumption (1.4mA max), and REF02 pin compatibility-making it ideal for upgrading legacy REF02 designs to extended-range operation without board redesign.
Availability
MAX675ESA+ is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interfaces, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX675ESA+ 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 industrial, medical, and communications systems.
The MAX675ESA+ belongs to Maxim's precision voltage reference product line, engineered specifically for applications demanding tight initial accuracy, low drift, and integrated temperature sensing without external components.
FAQ
What is the operating temperature range specified for the MAX675ESA+?
The MAX675ESA+ is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in the official Maxim datasheet ordering table and distinguishes it from the CP/CSA variants (0°C to +70°C). The device maintains its 15ppm/°C temperature coefficient and ±0.15% initial accuracy across this full range, making MAX675ESA+ suitable for deployment in harsh environments such as factory automation controllers and outdoor instrumentation.
Can the MAX675ESA+ be used as a direct replacement for the REF02 in existing PCB layouts?
Yes, the MAX675ESA+ is explicitly stated as pin-for-pin compatible with the REF02 in the datasheet Features section. Both devices share identical SO-8 and PDIP-8 pinouts, including VOUT, GND, VIN, and TRIM assignments. No PCB modifications are needed when upgrading from REF02 to MAX675ESA+, though users should verify that the improved 15ppm/°C tempco and lower noise of MAX675ESA+ align with system-level accuracy targets.
What is the function of the TEMP pin on the MAX675ESA+ and how is it calibrated?
The TEMP pin (Pin 6) on the MAX675ESA+ outputs a voltage proportional to absolute temperature: VTEMP ≈ 2.1 mV/°C × (T + 273), where T is in °C. At 25°C, this yields ~630mV, matching the datasheet's "Current Temperature Voltage Output" specification. This output is factory-calibrated and requires no external components-enabling direct ADC digitization for thermal monitoring or drift compensation without adding a separate temperature sensor.
Does the MAX675ESA+ require external capacitors for stability, and if so, what values are recommended?
Yes, the MAX675ESA+ requires a 0.1µF ceramic capacitor between VOUT (Pin 1) and GND (Pin 3) for output stability, as shown in all Typical Operating Circuits in the datasheet. This capacitor minimizes high-frequency noise and prevents oscillation under dynamic load conditions. No input capacitor is mandatory, but a 1µF bulk capacitor at VIN is recommended for transient suppression in noisy supply environments. The MAX675ESA+ does not require trim or TEMP pin capacitors.
How much can the output voltage of the MAX675ESA+ be adjusted using the TRIM pin, and does adjustment affect temperature performance?
The TRIM pin (Pin 2) on the MAX675ESA+ allows adjustment of the output voltage over a range of ±150mV around the nominal +5.000V, typically implemented with a 10kΩ potentiometer. Crucially, the datasheet confirms that output adjustment does not significantly degrade temperature performance: tempco increases by only ~0.7ppm/°C for each 100mV shifted from nominal. Therefore, even at ±150mV trim, MAX675ESA+ retains a worst-case tempco of ~16.05ppm/°C-still within specification for most industrial applications.
MAX675ESA+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.15%
- Temperature Coefficient:
- 15ppm/°C
- Noise - 0.1Hz to 10Hz:
- 10µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 18V ~ 33V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX675ESA+ FAQ
1.How can I place an order for MAX675ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX675ESA+ 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 MAX675ESA+ reliable?
The price and inventory of MAX675ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX675ESA+ is usually 5 days.
3.What payment methods are accepted for MAX675ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX675ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX675ESA+?
MAX675ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX675ESA+ 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 MAX675ESA+?
For technical support, including MAX675ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX675ESA+ requirements.
6.How does Aetrix verify that MAX675ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX675ESA+ 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 MAX675ESA+ meets industry standards.
7.What is the process for return or replacement of MAX675ESA+?
All MAX675ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX675ESA+, 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 MAX675ESA+ part is unused and in its original packaging.
Return procedure for MAX675ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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