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Analog Devices Inc./Maxim Integrated MAX6250ACSA+
- Part No.:
- MAX6250ACSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6250ACSA+.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
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Product details
Overview
MAX6250ACSA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with 1.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 3.0µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in metrology-grade instrumentation and ATE systems.
For engineers reviewing the MAX6250ACSA+ datasheet, MAX6250ACSA+ pinout, MAX6250ACSA+ application, or MAX6250ACSA+ equivalent, this page delivers verified specs, SO-8 package layout, trimming/noise-reduction interface details, and real-world substitution guidance for 16-bit+ data-conversion signal chains.
Technical Context
The MAX6250ACSA+ uses buried-zener core technology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its low 18mW typical supply current enables use in thermally constrained precision analog subsystems.
It supports bidirectional ±15mA load current, features stable operation with 0–100µF capacitive loads, and provides dedicated NR and TRIM pins for wideband noise reduction and ±30mV output adjustment-both functions validated across its 0°C to +70°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.001V at +25°C - ensures ≤0.02% absolute error in 16-bit full-scale reference for 32768-count systems |
| Tempco (Max) | 2.0ppm/°C over 0°C to +70°C - contributes ≤0.1ppm/°C drift uncertainty in calibrated lab equipment |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz), 2.5µVRMS (10Hz–1kHz) - preserves SNR >110dB in precision digitizers |
| Line Regulation | 2ppm/V (10–36V input) - maintains reference integrity despite unregulated supply ripple in industrial power rails |
| Load Regulation | 1ppm/mA sourcing/sinking - supports dynamic current demands of SAR ADC reference buffers without gain error |
| Supply Current | 2.0–3.3mA - enables low-power operation in battery-backed calibration modules |
| Long-Term Stability | 20ppm/1000h - guarantees <±0.01% drift over 6 months in deployed test equipment |
Pinout & Package
MAX6250ACSA+ is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, RoHS-compliant, with 1.27mm pitch and exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. | Internally connected; no external connection required - floating pins must remain unconnected per datasheet |
| 2 | IN | Positive supply input (8–36V) - requires local 2.2µF bypass capacitor to GND for transient immunity |
| 3 | NR | Noise reduction node - accepts 1µF capacitor to GND to reduce wideband noise by >20dB above 10Hz |
| 4 | GND | Analog ground reference - must be star-connected to minimize ground bounce in mixed-signal PCBs |
| 5 | TRIM | External voltage trim input - enables ±30mV (±0.6%) fine adjustment via 10kΩ potentiometer without affecting tempco |
| 6 | OUT | Stable 5.000V reference output - capable of sourcing/sinking ±15mA with <1µV/mA load-induced error |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1/f noise floor among 5V references - critical for sub-16-bit resolution metrology |
| Trim-adjustable output | ±30mV range via single external potentiometer - enables system-level calibration without firmware changes |
| Noise-reduction pin (NR) | Reduces 0.1Hz–10Hz noise by 40% with 1µF cap - eliminates need for external low-noise op-amp buffering |
| Capacitive-load stability | Operates stably with 0–100µF output capacitance - simplifies EMI filtering and decoupling in noisy environments |
| Turn-on settling time | 10µs to ±0.01% final value - supports fast-switching reference multiplexing in multi-channel DAQ systems |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter Calibration |
|---|---|
Use Scenario: 16-bit SAR ADC front-end in portable multimeters requiring traceable 5V reference under varying ambient temperatures. IC Role / Device Role / Timing Role: Primary voltage reference source for ADC VREF input, directly driving internal reference buffer. Use Value: 1.0ppm/°C tempco and 3.0µVP-P noise ensure ≤0.5LSB error across 0–70°C, meeting ANSI C12.1 Class 0.1 accuracy. |
Use Scenario: Benchtop digital voltmeter (DVM) performing NIST-traceable calibration against standard cells. IC Role / Device Role / Timing Role: Stable 5.000V reference for DVM's internal autoranging attenuator and integrator circuitry. Use Value: 20ppm/1000h long-term stability reduces annual recalibration frequency, lowering maintenance cost by 40%. |
| Automated Test Equipment (ATE) | Precision Current Source Reference |
Use Scenario: Channel card in semiconductor ATE system generating programmable 5V reference for DUT bias during parametric testing. IC Role / Device Role / Timing Role: Master reference for DAC-controlled current sources and voltage monitors across 32 parallel test channels. Use Value: ±15mA sink/source capability allows direct drive of multiple channel reference buffers without external op-amps. |
Use Scenario: 4-wire precision current source for resistance measurement in industrial sensor transmitters. IC Role / Device Role / Timing Role: Setpoint reference for op-amp-based Howland current pump, defining exact output current magnitude. Use Value: Load regulation of 1ppm/mA ensures <±0.005% current error even when driving 100Ω–10kΩ sensor loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V output, 3ppm/°C max tempco, 1.75µVP-P noise, 10mA max output | Lower noise but reduced drive strength - requires external buffer for >10mA loads | Preferred where ultra-low noise dominates over output current capability |
| REF5050AIDR | 5.0V output, 3ppm/°C max tempco, 4.5µVP-P noise, ±10mA output, SO-8 | Higher noise, lower drive, same package - lacks NR/trim pins | Selected when cost sensitivity outweighs need for trimming or noise optimization |
Compared with ADR4550BRZ and REF5050AIDR, MAX6250ACSA+ uniquely balances ultra-low tempco (2.0ppm/°C), integrated noise reduction, and ±15mA drive in SO-8 - making it optimal for space-constrained, high-dynamic-range reference designs where both accuracy and flexibility are required.
Availability
MAX6250ACSA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, digital voltmeters, and automated test equipment requiring stable component supply with guaranteed long-term calibration integrity.
Supply support for MAX6250ACSA+ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for precision, industrial, and communications applications.
The MAX62xx family was engineered specifically for metrology-grade voltage reference needs - targeting applications where 16-bit+ resolution, sub-ppm thermal drift, and microvolt-level noise must coexist in compact, low-power packages.
FAQ
What is the maximum input voltage rating for MAX6250ACSA+?
The MAX6250ACSA+ has an absolute maximum input voltage of +40V on the IN pin, but its specified operating range is 8V to 36V. Operation within this 8–36V window ensures all electrical characteristics-including line regulation (2ppm/V) and supply current (2.0–3.3mA)-are maintained per datasheet limits. Exceeding 36V risks exceeding safe power dissipation in the 8-SO package (471mW max at +70°C).
Does MAX6250ACSA+ require an external capacitor on the NR pin?
No, the NR pin on MAX6250ACSA+ is optional: leaving it open yields baseline 3.0µVP-P (0.1–10Hz) noise performance. Adding a 1µF capacitor to GND reduces low-frequency noise by ~40%, verified in Typical Operating Characteristics (TOC12). Larger values provide diminishing returns, and the device remains fully functional without any NR capacitor.
Can MAX6250ACSA+ drive a 10kΩ load directly?
Yes, MAX6250ACSA+ can directly drive a 10kΩ load at 5V (0.5mA), well within its ±15mA sourcing/sinking capability. Load regulation is specified at 1ppm/mA, meaning a 0.5mA load induces only 0.5ppm (2.5nV) output shift - negligible for 16-bit systems. No buffer amplifier is needed for such resistive loads.
What is the purpose of pins 1, 7, and 8 on MAX6250ACSA+?
Pins 1, 7, and 8 on MAX6250ACSA+ are internally connected (I.C.) and serve no external function. The datasheet explicitly states "Do not use" - these pins must remain unconnected in PCB layout. Routing traces or applying solder to them may compromise thermal performance or introduce parasitic coupling, degrading noise or stability.
How does the TRIM pin on MAX6250ACSA+ affect temperature coefficient?
The TRIM pin on MAX6250ACSA+ enables ±30mV (±0.6%) output adjustment via an external 10kΩ potentiometer, but the datasheet confirms this external trimming "does not affect temperature stability." The buried-zener core and on-chip compensation remain unchanged, preserving the rated 2.0ppm/°C max tempco across 0°C to +70°C after trimming.
MAX6250ACSA+ 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, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 2ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- 2.5µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3.3mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6250ACSA+ FAQ
1.How can I place an order for MAX6250ACSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6250ACSA+ 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 MAX6250ACSA+ reliable?
The price and inventory of MAX6250ACSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6250ACSA+ is usually 5 days.
3.What payment methods are accepted for MAX6250ACSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6250ACSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6250ACSA+?
MAX6250ACSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6250ACSA+ 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 MAX6250ACSA+?
For technical support, including MAX6250ACSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6250ACSA+ requirements.
6.How does Aetrix verify that MAX6250ACSA+ is sourced from the original manufacturer or authorized distributors?
All MAX6250ACSA+ 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 MAX6250ACSA+ meets industry standards.
7.What is the process for return or replacement of MAX6250ACSA+?
All MAX6250ACSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6250ACSA+, 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 MAX6250ACSA+ part is unused and in its original packaging.
Return procedure for MAX6250ACSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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