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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:2,663
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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 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 device delivers laboratory-grade stability in an industry-standard 8-pin SO package with verified load regulation to ±15mA, trim-adjustable output, and noise-reduction terminal support.
Technical Context
The MAX6250ACSA employs buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature across 0°C to +70°C, enabling sub-ppm/°C drift without oven control. Its low-output-impedance architecture (<1Ω at 1kHz) and fast 10µs turn-on settling (±0.01%) support dynamic load conditions in 16-bit data converters.
It features dual regulation paths: line regulation of 2ppm/V (10–36V input) and load regulation of 1–6ppm/mA (sourcing), both guaranteed over full temperature range. The NR pin accepts optional 1µF capacitor to reduce wideband noise without degrading transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1mV at +25°C - enables direct interface with 5V-rail SAR ADCs without level-shifting. |
| Temp Coefficient | 1.0ppm/°C max (0°C to +70°C) - ensures ≤0.35ppm total drift over industrial ambient range. |
| Initial Accuracy | ±0.02% (±1mV) - eliminates need for system-level calibration in Class I digital multimeters. |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz) - preserves ENOB >16.2 bits in 100kSPS precision digitizers. |
| Load Current | ±15mA sourcing/sinking - supports driving 50Ω back-terminated lines or multiple op-amp reference inputs. |
| Supply Current | 2.0–3.3mA - enables low-power portable calibrators with battery life >100 hours at 9V. |
| Long-Term Stability | 20ppm/1000h - meets 1-year calibration interval requirements for field-deployed test equipment. |
Pinout & Package
MAX6250ACSA is housed in an 8-pin SO (Small Outline) package per outline 21-0041, RoHS-compliant, with 1.27mm pitch and exposed pad not connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection required; internal bonding only - must remain unconnected on PCB. |
| 2 | IN | Positive supply input (8–36V); requires ≥1µF bypass capacitor to GND for ripple rejection. |
| 3 | NR | Noise reduction node - connect 1µF capacitor to GND to cut wideband noise by >20dB above 10Hz. |
| 4 | GND | Analog ground reference - star-point connection mandatory to avoid ground-loop-induced offset drift. |
| 5 | TRIM | External voltage adjust input - ±30mV trim range via 10kΩ potentiometer enables fine-tuning without affecting tempco. |
| 6 | OUT | Stable 5.000V reference output - capable of driving capacitive loads up to 100µF with no phase margin loss. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.0ppm/°C tempco and 3.0µVP-P low-frequency noise - critical for metrology-grade DC measurements. |
| Trim-adjustable output | ±30mV adjustment range (±0.6%) with zero impact on temperature stability - supports end-of-line calibration. |
| Noise reduction terminal | NR pin accepts 1µF capacitor to suppress broadband noise without compromising transient response or PSRR. |
| Capacitive-load tolerant | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in noisy mixed-signal environments. |
| Fast turn-on settling | 10µs to ±0.01% final value - enables power-gated reference use in low-duty-cycle portable instruments. |
Applications
| Digital Voltmeter Reference | High-Resolution ADC Biasing |
|---|---|
Use Scenario: Primary reference in handheld 6½-digit DVMs requiring <10ppm/year drift and <0.1µV RMS noise. IC Role / Device Role / Timing Role: Precision DC voltage source establishing absolute measurement scale for integrating ADC front-end. Use Value: Enables 0.0015% basic accuracy specification with no warm-up delay or auto-calibration cycles. | Use Scenario: Reference for 16-bit SAR ADCs in automated test equipment performing 100kSPS waveform capture. IC Role / Device Role / Timing Role: Low-noise, low-impedance analog reference rail decoupled from digital supply domains. Use Value: Maintains ENOB ≥15.8 bits across full temperature range and load transients up to ±10mA. |
| Precision Current Source | Industrial Process Controller Reference |
Use Scenario: Setpoint generator for 4–20mA loop calibrators used in field instrument validation. IC Role / Device Role / Timing Role: Stable excitation source for precision current mirror or op-amp-based Howland current pump. Use Value: Delivers <5ppm error contribution to loop accuracy under varying supply (8–36V) and ambient (-20°C to +70°C). | Use Scenario: Reference for analog input modules in PLCs monitoring thermocouple or RTD signals with 0.1°C resolution. IC Role / Device Role / Timing Role: High-stability voltage reference for sigma-delta ADCs and programmable gain instrumentation amplifiers. Use Value: Supports 1-year recalibration interval while maintaining <0.01% span error across operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050AIDR | 5.0V output, 3ppm/°C max, 1.6µVP-P noise, 10mA max load - uses XFET topology instead of buried zener. | Lower noise but higher tempco; requires external buffer for ±15mA drive capability. | Select when ultra-low noise dominates over tempco and output drive strength. |
| ADR4550BRZ | 5.0V output, 2ppm/°C max, 2.75µVP-P noise, ±10mA load - precision bandgap with laser-trimmed thin-film resistors. | Higher long-term drift (35ppm/1000h); limited sink capability; no TRIM/NR pins. | Select when cost-sensitive designs accept moderate drift and simplified pin count. |
Compared with REF5050AIDR and ADR4550BRZ, the MAX6250ACSA uniquely combines 1ppm/°C tempco, ±15mA bidirectional drive, and dedicated TRIM/NR terminals - making it optimal for metrology-grade systems requiring simultaneous low drift, high drive, and field calibration.
Availability
MAX6250ACSA is available at Aetrix Electronics and suitable for high-accuracy digital voltmeters, automated test equipment, and industrial process controllers requiring stable component supply with traceable lot history and extended lifecycle support.
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) designs high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX62xx family targets metrology, instrumentation, and high-end data acquisition - delivering laboratory-grade voltage references in compact surface-mount packages without oven control or external compensation.
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 above 36V risks exceeding safe power dissipation limits, especially at elevated ambient temperatures. For reliable long-term performance, maintain VIN ≤ 36V and ensure thermal derating per the SO package's 5.88mW/°C spec above +70°C. The MAX6250ACSA datasheet confirms continuous operation is valid only within the 8–36V window.
Does MAX6250ACSA require an external capacitor on the NR pin?
No, the NR pin on MAX6250ACSA is optional: leaving it open yields standard 3.0µVP-P (0.1Hz–10Hz) noise performance. Adding a 1µF capacitor reduces wideband noise significantly - confirmed in Figure 12 of the datasheet - but does not affect low-frequency drift or tempco. The MAX6250ACSA remains fully functional without it, though metrology-grade applications typically implement the NR cap to achieve best-in-class noise floor.
Can MAX6250ACSA drive a 50Ω transmission line directly?
Yes, MAX6250ACSA can drive a 50Ω load continuously: its ±15mA output current rating supports 250mV drop across 50Ω at full sink/source, well within its guaranteed load-regulation spec of 1–6ppm/mA. Transient response remains stable (see Figure 19–21), and output impedance stays <1Ω up to 1kHz. However, for sustained 50Ω termination, verify junction temperature remains below 125°C using the SO package's 471mW max power dissipation at +70°C ambient. The MAX6250ACSA datasheet explicitly validates operation under these conditions.
What is the trim-adjustment range for MAX6250ACSA?
The MAX6250ACSA provides ±30mV (±0.6%) output adjustment range via the TRIM pin when configured with a 10kΩ potentiometer between OUT and GND, as shown in Figure 1 of the datasheet. This range is guaranteed across the full 0°C to +70°C operating temperature and does not degrade initial accuracy or temperature coefficient. The MAX6250ACSA's trim function enables field calibration without hardware modification - a key requirement for portable calibration standards.
Is MAX6250ACSA compatible with ceramic output capacitors up to 100µF?
Yes, MAX6250ACSA is unconditionally stable with ceramic, tantalum, or electrolytic output capacitors from 0µF to 100µF across all load currents (0 to ±15mA), as stated in the Applications Information section and verified in Typical Operating Characteristics (Figure 16). No series resistance or ferrite bead is needed. This eliminates output ringing during load transients - a critical feature for multiplexed data acquisition systems. The MAX6250ACSA's internal compensation ensures phase margin remains >45° even with worst-case ESR/ESL combinations.
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:
- Obsolete
- 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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