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Analog Devices Inc./Maxim Integrated MAX6350CSA+
- Part No.:
- MAX6350CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6350CSA+.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
MAX6350CSA+ from Maxim Integrated is a precision 5.000V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 0.5ppm/°C typical temperature coefficient, and 3.0µVp-p (0.1Hz–10Hz) output noise. It sources/sinks ±15mA, operates from 8V to 36V input, and targets high-resolution ADC/DAC systems requiring stable, low-drift references.
For engineers reviewing the MAX6350CSA+ datasheet, MAX6350CSA+ pinout, MAX6350CSA+ application, or MAX6350CSA+ equivalent, key selection criteria include its 5V output, 1ppm/°C max tempco, ±30mV trim range, 8-pin SO package, and compatibility with capacitive loads up to 100µF without instability.
Technical Context
The MAX6350CSA+ employs a buried-zener core with proprietary low-power temperature compensation, achieving near-zero curvature over –40°C to +85°C. Its output voltage is trimmed via an external potentiometer at the TRIM pin, with no degradation to temperature stability.
Wideband noise is reduced by adding a 1µF capacitor to the NR pin; output impedance remains below 1Ω up to 10kHz, supporting fast load-transient response (<10µs settling to ±0.01%). Input ripple rejection exceeds 70dB at 1kHz with CNR = 1µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.02% - Enables direct interface with 16-bit SAR and delta-sigma ADCs without gain calibration. |
| Tempco (max) | 1ppm/°C - Guarantees ≤±0.5ppm drift over 0°C to +70°C ambient, critical for metrology-grade instruments. |
| Noise (0.1–10Hz) | 3.0µVp-p - Limits RMS noise contribution to <0.9µV in 16-bit 5V full-scale systems (LSB = 76µV). |
| Load Regulation | ±7ppm/mA - Maintains output stability across full ±15mA sourcing/sinking, suitable for driving op-amp buffers or DAC reference inputs. |
| Line Regulation | 10ppm/V - Holds output error <±50ppm over 8V–36V input range, enabling use with unregulated industrial supplies. |
| Long-Term Stability | 30ppm/1000hr - Predicts <±120ppm drift over 6 months, supporting long-life embedded sensor nodes. |
| Supply Current | 2.0–3.3mA - Enables low-power operation in battery-backed precision data loggers. |
Pinout & Package
MAX6350CSA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.27mm pitch). Pins 1, 7, and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8V–36V DC; internal regulation enables stable reference despite wide input variation. |
| GND (Pin 4) | Ground reference | Low-impedance return path; must be star-connected to minimize ground bounce in mixed-signal systems. |
| NR (Pin 3) | Noise reduction node | Connects to 1µF capacitor to reduce wideband noise; open-circuit if unused. |
| OUT (Pin 6) | Reference output | 5.000V precision source/sink; stable with 0–100µF capacitive loads-no external compensation needed. |
| TRIM (Pin 5) | External voltage adjustment | Accepts 0–5V to enable ±30mV (±0.6%) fine-tuning; does not affect tempco or long-term drift. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest intrinsic noise (3.0µVp-p) and highest long-term stability (30ppm/1000hr) among 5V references in SO-8. |
| Trim-adjustable output | ±30mV range via external potentiometer enables system-level calibration without trimming resistors on PCB. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance-eliminates need for isolation resistors in noisy environments. |
| Fast transient response | Settles within 10µs to ±0.01% after ±15mA load step-supports dynamic reference switching in multi-channel DAQ. |
| High PSRR | 70dB rejection at 1kHz ensures minimal coupling of switching regulator ripple into precision analog signal chains. |
Applications
| High-Resolution ADC Systems | Precision Current Sources |
|---|---|
Use Scenario: 16-bit successive-approximation ADC in automated test equipment digitizing sensor signals with ±0.01% linearity requirement. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale range for analog front-end; directly drives ADC REFIN pin. Use Value: 0.5ppm/°C tempco and 3.0µVp-p noise prevent LSB errors across temperature and time, eliminating recalibration cycles. | Use Scenario: Programmable 4–20mA transmitter for industrial pressure sensors requiring NIST-traceable output accuracy. IC Role / Device Role / Timing Role: Stable 5V reference for op-amp-based current-loop controller; sets IOUT = VREF/Rsense. Use Value: ±15mA sourcing capability allows direct drive of loop amplifier without external buffer; ±0.02% initial accuracy ensures <±0.008mA absolute error. |
| Digital Voltmeters | ATE Equipment |
Use Scenario: Benchtop DVM measuring 0–5V DC with 100ppm basic accuracy and auto-ranging functionality. IC Role / Device Role / Timing Role: Master reference for internal 24-bit sigma-delta ADC and calibration DAC; used during self-test and zero-offset correction. Use Value: 30ppm/1000hr long-term stability reduces annual calibration frequency; optional TRIM pin enables factory offset nulling. | Use Scenario: Semiconductor ATE system performing parametric testing of analog ICs under varying thermal conditions. IC Role / Device Role / Timing Role: Reference for precision source-measure units (SMUs); supplies excitation voltage to DUT and reference for measurement ADCs. Use Value: 1ppm/°C max tempco ensures <±0.5ppm error over –40°C to +85°C chamber sweep, maintaining test repeatability across thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.000V output, ±0.02% initial accuracy, but 3ppm/°C max tempco and 4.5µVp-p noise (0.1–10Hz). | Higher tempco limits use in wide-temperature industrial environments; higher noise affects >18-bit systems. | Select when lower cost and SOIC-8 footprint are prioritized over ultra-low drift/noise. |
| REF5050AIDR | 5.000V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 4.8µVp-p noise, and 10mA max output current. | Lower output drive limits use with high-capacitance loads or low-impedance buffers; wider initial tolerance requires system calibration. | Select for TI-ecosystem designs where pin compatibility with other REF50xx devices is required. |
Compared with ADR4550BRZ and REF5050AIDR, the MAX6350CSA+ offers superior temperature stability (1ppm/°C vs. ≥3ppm/°C), lower noise (3.0µVp-p vs. ≥4.5µVp-p), and higher output current (±15mA vs. ≤10mA), making it optimal for metrology, high-speed DAQ, and industrial control where reference-induced error must be minimized.
Availability
MAX6350CSA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, precision current sources, and digital voltmeters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6350CSA+ 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 test/measurement applications.
The MAX63xx family was engineered specifically for metrology-grade voltage references-prioritizing ultra-low tempco, buried-zener noise performance, and robust load/line regulation in compact SO-8 packages.
FAQ
What is the maximum input voltage rating for the MAX6350CSA+?
The MAX6350CSA+ has an absolute maximum input voltage rating of 40V referenced to GND. However, its specified operating input voltage range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits and may degrade long-term stability-even if within absolute maximum ratings-so design must maintain VIN ≤36V for reliable performance per the datasheet specifications for MAX6350CSA+.
Does the MAX6350CSA+ require an external capacitor on the NR pin for basic operation?
No, the NR pin on the MAX6350CSA+ is optional. Leaving it open (unconnected) results in standard 3.0µVp-p (0.1–10Hz) noise performance. A 1µF capacitor to GND reduces wideband noise further; larger values provide diminishing returns. The MAX6350CSA+ functions fully without any NR capacitor, making it suitable for space-constrained layouts where noise margins allow.
Can the MAX6350CSA+ drive a 10µF output capacitor without oscillation?
Yes, the MAX6350CSA+ is explicitly characterized and guaranteed stable with output capacitive loads from 0µF to 100µF across its full operating temperature and load-current range. This eliminates the need for series isolation resistors or complex compensation networks-unlike many bandgap references-and simplifies layout for low-noise applications such as precision sensor signal conditioning where large bulk capacitance is used.
What is the purpose of the TRIM pin on the MAX6350CSA+, and how much adjustment does it provide?
The TRIM pin on the MAX6350CSA+ allows external fine-tuning of the output voltage over a ±30mV range (±0.6% of 5V), achieved by connecting a 10kΩ potentiometer between OUT and GND with its wiper to TRIM. This adjustment does not compromise temperature coefficient or long-term stability. It enables system-level calibration to compensate for PCB trace resistance, ADC offset, or sensor nonlinearity-without requiring laser trimming or custom resistor networks.
Is the MAX6350CSA+ compatible with both sourcing and sinking load currents?
Yes, the MAX6350CSA+ is fully bidirectional: it can source up to +15mA and sink down to –15mA while maintaining specified accuracy and regulation. This supports active load configurations-for example, driving the inverting input of an op-amp in a precision current source-or interfacing with circuits that pull current from the reference node during certain phases. Load regulation is guaranteed across this full ±15mA range, ensuring consistent performance in dual-direction applications.
MAX6350CSA+ 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:
- 1ppm/°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
MAX6350CSA+ FAQ
1.How can I place an order for MAX6350CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6350CSA+ 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 MAX6350CSA+ reliable?
The price and inventory of MAX6350CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6350CSA+ is usually 5 days.
3.What payment methods are accepted for MAX6350CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6350CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6350CSA+?
MAX6350CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6350CSA+ 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 MAX6350CSA+?
For technical support, including MAX6350CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6350CSA+ requirements.
6.How does Aetrix verify that MAX6350CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX6350CSA+ 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 MAX6350CSA+ meets industry standards.
7.What is the process for return or replacement of MAX6350CSA+?
All MAX6350CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6350CSA+, 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 MAX6350CSA+ part is unused and in its original packaging.
Return procedure for MAX6350CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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