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Analog Devices Inc./Maxim Integrated MAX6350ESA+
- Part No.:
- MAX6350ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6350ESA+.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
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Product details
Overview
MAX6350ESA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with ±0.02% initial accuracy, 1.5ppm/°C max temperature coefficient (–40°C to +85°C), and 3.0µVp-p (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in industrial instrumentation and ATE systems.
For engineers reviewing the MAX6350ESA+ datasheet, MAX6350ESA+ pinout, MAX6350ESA+ application, or MAX6350ESA+ equivalent, key selection criteria include its 5V output stability under ±15mA load, optional external trim capability, low 3.3mA supply current, and SO-8 package compatibility with legacy layout footprints.
Technical Context
The MAX6350ESA+ employs buried-zener core technology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its output voltage is trimmed via an internal resistor network referenced to the TRIM pin, enabling ±30mV adjustment without degrading tempco performance.
It delivers stable regulation across 8V–36V input range with guaranteed line regulation ≤18ppm/V and load regulation ≤7ppm/mA, while maintaining low 0.1Ω output impedance at 10kHz-critical for driving capacitive loads up to 100µF in high-speed data acquisition circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1mV at +25°C - enables direct interface with 16-bit SAR ADCs requiring <±0.5LSB reference error |
| Initial Accuracy | ±0.02% - eliminates need for system-level calibration in precision digital voltmeters |
| Tempco (max) | 1.5ppm/°C over –40°C to +85°C - ensures <±80ppm drift across full industrial temperature range |
| Noise (0.1–10Hz) | 3.0µVp-p - supports <18-bit ENOB in sigma-delta converters without external filtering |
| Load Current | ±15mA sourcing/sinking - drives multiple op-amp buffers or multiplexed DAC references simultaneously |
| Supply Current | 3.3mA typical - compatible with low-power isolated supplies in portable test equipment |
| Long-Term Stability | 30ppm/1000hr - maintains calibration integrity in unattended ATE systems over extended runtime |
Pinout & Package
MAX6350ESA+ is housed in an 8-pin SO (Small Outline) package compliant with JEDEC MS-012, with 1.27mm pitch and exposed pad not connected internally. Pin 1 is marked by notch or dot; pins 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8V–36V unregulated input; requires ≥2.2µF bypass capacitor for ripple rejection |
| GND (Pin 4) | Analog ground reference | Must be star-connected to system AGND; separates reference return from digital switching currents |
| NR (Pin 3) | Noise reduction node | Connects to 1µF capacitor to reduce wideband noise; open-circuit if unused |
| OUT (Pin 6) | Precision 5V output | Low-impedance source capable of driving 100µF capacitive loads without oscillation |
| TRIM (Pin 5) | External voltage adjust | Accepts 0–5V control signal or potentiometer wiper to fine-tune output ±30mV |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest intrinsic noise (3.0µVp-p) and highest long-term stability (30ppm/1000hr) among SO-8 voltage references |
| Optional noise reduction | 1µF capacitor on NR pin reduces 10Hz–100kHz noise by >20dB without affecting DC accuracy |
| External trim capability | ±30mV adjustment range via TRIM pin preserves ±0.02% initial accuracy and 1.5ppm/°C tempco |
| Capacitive load immunity | Stable with 0–100µF output capacitance-eliminates need for series isolation resistors in multi-channel systems |
| Industry-standard SO-8 footprint | Direct replacement for legacy references (e.g., REF5050) without PCB redesign |
Applications
| High-Resolution Data Converters | Precision Industrial Control |
|---|---|
Use Scenario: 16-bit simultaneous-sampling ADC in programmable logic controller analog input module. IC Role / Device Role / Timing Role: Primary 5V reference for ADC front-end, providing stable excitation for RTD and strain-gauge bridges. Use Value: ±0.02% initial accuracy and 1.5ppm/°C tempco ensure <±0.5°C measurement error over –25°C to +70°C ambient range. | Use Scenario: Closed-loop current control in servo drive feedback path using dual 16-bit DACs. IC Role / Device Role / Timing Role: Shared 5V reference for both DACs to maintain channel-to-channel gain matching. Use Value: 30ppm/1000hr long-term stability prevents drift-induced torque ripple during 24/7 operation. |
| Digital Voltmeters | ATE Equipment |
Use Scenario: 7½-digit bench DVM requiring sub-10ppm absolute accuracy over 24-hour calibration cycle. IC Role / Device Role / Timing Role: Master reference for auto-zero and ratiometric measurement engine. Use Value: 3.0µVp-p low-frequency noise enables <100nV resolution without averaging, reducing test time. | Use Scenario: High-channel-count semiconductor tester with per-site 16-bit DAC-based stimulus generation. IC Role / Device Role / Timing Role: Per-site 5V reference ensuring independent calibration traceability across 96 channels. Use Value: ±15mA output drive supports parallel buffering for 12-channel DAC banks without gain error accumulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050IDR | Higher 3ppm/°C max tempco; 4.5µVp-p noise; 2.5mA supply current | Limited to 10mA load; no TRIM pin; requires external buffer for >100pF loads | Lower cost where ±0.05% accuracy suffices and board space allows larger SO-8 variant |
| ADR4550BRZ | Lower 0.9ppm/°C max tempco; 2.75µVp-p noise; 4.2mA supply current | Requires 10µF NR capacitor; no internal trim; higher 5.5V min input voltage | Preferred for metrology-grade systems needing <±20ppm total drift but accepting higher quiescent power |
Compared with REF5050IDR and ADR4550BRZ, the MAX6350ESA+ uniquely balances ultra-low noise, factory-trimmed 5V output, and ±15mA drive in a standard SO-8-making it optimal for space-constrained ATE and portable instrumentation where trim flexibility and capacitive load robustness are critical.
Availability
MAX6350ESA+ is available at Aetrix Electronics and suitable for high-resolution data converters, precision industrial control systems, and automated test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6350ESA+ 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 MAX63xx family was developed specifically for metrology-grade voltage reference needs in 16–18-bit data acquisition systems-emphasizing buried-zener stability, low-noise operation, and industrial temperature resilience.
FAQ
What is the maximum input voltage rating for the MAX6350ESA+?
The MAX6350ESA+ has an absolute maximum input voltage rating of 40V on the IN pin. However, the recommended operating input voltage range is 8V to 36V. Operation above 36V risks exceeding thermal limits and degrading long-term stability-even if within absolute maximum ratings-so design margins should maintain VIN ≤36V under all conditions including transients.
Can the MAX6350ESA+ drive a 100µF output capacitor without instability?
Yes, the MAX6350ESA+ is explicitly characterized and guaranteed stable with output capacitive loads from 0µF to 100µF across full temperature and load ranges. This eliminates the need for series isolation resistors or ferrite beads in applications like multi-channel DAC reference distribution, where large bulk capacitance is used to suppress supply-induced noise coupling.
Does the TRIM pin on the MAX6350ESA+ affect temperature coefficient performance?
No, the TRIM pin on the MAX6350ESA+ enables ±30mV output adjustment without degrading temperature coefficient performance. The internal trimming circuitry uses ratio-matched components that track with temperature, preserving the specified 1.5ppm/°C max tempco across the full trim range-verified in the datasheet's electrical characteristics table under "Trim-Adjustment Range" conditions.
What is the typical turn-on settling time for the MAX6350ESA+?
At +25°C, the MAX6350ESA+ achieves turn-on settling to ±0.01% of final value in 10µs when powered from 10V input with no external capacitors. This fast settling supports high-throughput ATE applications where reference stabilization time directly impacts test cycle duration-confirmed in Figure 24 of the MAX6325/MAX6341/MAX6350 datasheet.
Is the MAX6350ESA+ RoHS-compliant and lead-free?
Yes, the MAX6350ESA+ is RoHS-compliant and lead-free. The "+" suffix in the part number denotes lead-free packaging per Maxim Integrated's standard qualification-verified in the official ordering information table, which lists MAX6350ESA+ as the RoHS-compliant version of the SO-8 packaged device rated for –40°C to +85°C operation.
MAX6350ESA+ 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:
- 1.5ppm/°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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6350ESA+ FAQ
1.How can I place an order for MAX6350ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6350ESA+ 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 MAX6350ESA+ reliable?
The price and inventory of MAX6350ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6350ESA+ is usually 5 days.
3.What payment methods are accepted for MAX6350ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6350ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6350ESA+?
MAX6350ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6350ESA+ 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 MAX6350ESA+?
For technical support, including MAX6350ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6350ESA+ requirements.
6.How does Aetrix verify that MAX6350ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6350ESA+ 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 MAX6350ESA+ meets industry standards.
7.What is the process for return or replacement of MAX6350ESA+?
All MAX6350ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6350ESA+, 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 MAX6350ESA+ part is unused and in its original packaging.
Return procedure for MAX6350ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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