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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:1,132
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Product details
Overview
MAX6350ESA from Maxim Integrated is a precision 5.000V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 1.5ppm/°C max temperature coefficient (–40°C to +85°C), 3.0µVp-p (0.1Hz–10Hz) output noise, and ±15mA output sourcing/sinking capability - ideal for 16-bit ADC/DAC reference in industrial data acquisition systems.
For engineers reviewing the MAX6350ESA datasheet, MAX6350ESA pinout, MAX6350ESA application, or MAX6350ESA equivalent, key selection criteria include its 5V output stability under capacitive loads up to 100µF, optional external trim (±30mV range), noise-reduction capacitor support, and guaranteed load regulation across full –15mA to +15mA current range.
Technical Context
The MAX6350ESA implements a low-power, temperature-compensated buried-zener core achieving near-flat output drift over –40°C to +85°C, with hysteresis limited to 20ppm and long-term stability of 30ppm/1000hr. Its internal architecture supports simultaneous high-frequency transient response (<10µs settling to ±0.01%) and ultra-low 1/f noise performance.
It operates from an 8V–36V input, draws only 2.0–3.3mA supply current, and maintains stable regulation with no external compensation required - even when driving dynamic loads or interfacing directly with SAR ADC sample-and-hold inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.02% (±1mV) - enables direct 16-bit DAC/ADC full-scale reference without calibration. |
| Tempco (max) | 1.5ppm/°C (–40°C to +85°C) - ensures <±80µV drift over full industrial temperature range. |
| Output Noise | 3.0µVp-p (0.1Hz–10Hz), 5.0µVRMS (10Hz–1kHz) - preserves SNR in high-resolution measurement front-ends. |
| Load Regulation | ±7ppm/mA - maintains <±105µV error across full ±15mA output current swing. |
| Line Regulation | 10ppm/V (8V–36V input) - rejects supply ripple without additional filtering. |
| Long-Term Stability | 30ppm/1000hr - supports metrology-grade calibration intervals without field recalibration. |
| Trim Range | ±30mV (±0.6%) via external potentiometer - allows system-level fine-tuning without trimming resistors on PCB. |
Pinout & Package
MAX6350ESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and exposed pad not present. Pin 1, 7, and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection; floating or tied to GND has no effect - must be left unconnected per datasheet. |
| 2 | IN | Positive power input (8V–36V); requires local 2.2µF bypass to GND for optimal ripple rejection. |
| 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 systems. |
| 5 | TRIM | External voltage divider tap point; adjusts output ±30mV (±0.6%) without degrading tempco or stability. |
| 6 | OUT | Stable 5.000V reference output; drives capacitive loads up to 100µF with no phase margin loss. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1/f noise (3.0µVp-p) among 5V references in SO package - critical for µV-level measurements. |
| Capacitive-load stability | Guaranteed stable with 0–100µF output capacitance - eliminates need for isolation resistors in ADC buffer designs. |
| Optional noise reduction | 1µF NR capacitor reduces integrated noise by 40% (0.1Hz–10Hz) - enables sub-18-bit ENOB in precision digitizers. |
| External trim capability | ±30mV adjustment range via 10kΩ potentiometer - supports system-level calibration without firmware or laser trimming. |
| Transient response | Settles within 10µs to ±0.01% after ±15mA load step - prevents missing codes during fast-sampling ADC sequences. |
Applications
| High-Resolution Data Converters | Precision Current Sources |
|---|---|
Use Scenario: Reference for 16-bit successive-approximation ADC in portable multimeter front-end. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale analog input range with minimal code-width variation. Use Value: ±0.02% initial accuracy and 1.5ppm/°C tempco ensure <±1 LSB error across temperature - eliminating factory recalibration. | Use Scenario: Setpoint generator for programmable 4–20mA transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable 5V reference feeding precision op-amp current mirror controlling loop current. Use Value: 30ppm/1000hr long-term stability guarantees <±0.05% loop accuracy over 5-year field deployment without maintenance. |
| Digital Voltmeters | ATE Equipment |
Use Scenario: Input reference in benchtop 6½-digit DVM measuring DC voltages from 100mV to 1000V. IC Role / Device Role / Timing Role: Master reference for internal ratiometric scaling and auto-zero circuitry. Use Value: 20ppm temperature hysteresis and <1.5µVp-p noise enable repeatable 10ppm measurement resolution at 25°C. | Use Scenario: Calibration reference in automated test system verifying 12–16-bit DAC linearity and gain error. IC Role / Device Role / Timing Role: Stimulus source for DUT reference input during production functional test. Use Value: ±15mA sourcing/sinking supports direct drive of DUT reference pins - eliminating external buffers and reducing test fixture complexity. |
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 | 5.0V output, 3ppm/°C max tempco, 1.6µVp-p noise, SO-8, but requires 3.3V–18V input and lacks TRIM/NR pins. | Lower noise but no external trim or noise-reduction capacitor option - less flexible for field calibration or noisy environments. | Choose REF5050IDR only if system input voltage is <18V and trim/noise-reduction features are unnecessary. |
| ADR4550BRZ | 5.0V output, 1ppm/°C max tempco, 2.75µVp-p noise, SO-8, includes NR pin but no TRIM pin; higher cost and longer lead time. | Superior tempco and slightly lower noise, but no external adjustment - limits use in systems requiring end-of-line calibration. | Choose ADR4550BRZ when ultimate temperature stability is mandatory and trim capability is not required. |
Compared with REF5050IDR and ADR4550BRZ, the MAX6350ESA uniquely combines 5V precision, industry-standard SO-8 footprint, external trim, noise-reduction capacitor support, and robust 8V–36V operation - making it the most adaptable choice for industrial instrumentation with variable supply rails and calibration requirements.
Availability
MAX6350ESA is available at Aetrix Electronics and suitable for high-resolution data converters, precision current sources, digital voltmeters, ATE equipment, and high-accuracy industrial control systems requiring stable component supply across extended temperature ranges.
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 precision analog and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low-noise, high-accuracy performance.
The MAX63xx family was engineered specifically for metrology-grade voltage reference needs in 16-bit+ data acquisition systems - prioritizing tempco, noise, and long-term stability over cost or power minimization.
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, but its specified operating range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits and may degrade long-term stability. For reliable 24V industrial rail applications, the MAX6350ESA operates safely with typical supply current of 2.0–3.3mA and 18mW power consumption.
Does the MAX6350ESA require an external capacitor on the NR pin?
No, the NR pin on the MAX6350ESA is optional - leaving it open provides standard 3.0µVp-p noise performance. Adding a 1µF capacitor to NR reduces 0.1Hz–10Hz noise by ~40%, but larger values yield diminishing returns. The MAX6350ESA remains fully functional and stable without any NR capacitor, making it suitable for space-constrained layouts where that capacitor is omitted.
Can the MAX6350ESA drive a 100µF output capacitor without oscillation?
Yes, the MAX6350ESA is explicitly characterized and guaranteed stable with output capacitance from 0µF to 100µF across its full –15mA to +15mA load range. This eliminates the need for series isolation resistors typically required with other references, simplifying PCB layout and improving transient response in ADC reference buffer applications.
What is the purpose of the TRIM pin on the MAX6350ESA?
The TRIM pin on the MAX6350ESA allows ±30mV (±0.6%) output adjustment using a 10kΩ potentiometer between OUT and GND, with the wiper connected to TRIM. This external trim does not affect temperature coefficient or long-term stability, enabling system-level calibration after assembly - critical for meeting tight absolute accuracy requirements in production test without laser trimming.
Is the MAX6350ESA pin-compatible with other members of the MAX63xx family?
Yes, the MAX6350ESA shares identical 8-pin SO package, pinout, and electrical interface with MAX6325ESA and MAX6341ESA - differing only in nominal output voltage (2.5V, 4.096V, 5V). This allows drop-in replacement in existing designs when scaling reference voltage, provided input voltage and load conditions remain within spec.
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:
- 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:
- 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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