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Analog Devices Inc./Maxim Integrated VT1188SFQR
- Part No.:
- VT1188SFQR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
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- Datasheet:
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VT1188SFQR.pdf
- Description:
- VT1188SFQR
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Product details
Overview
VT1188SFQR from Analog Devices is a high-precision, low-noise voltage reference IC with 0.05% initial accuracy, 3 ppm/°C temperature coefficient, and 1.2 μVpp noise (0.1–10 Hz). It delivers stable 2.5 V output in an 8-lead SOIC package and is used in precision data acquisition systems requiring tight DC accuracy.
For engineers reviewing the VT1188SFQR datasheet, VT1188SFQR pinout, VT1188SFQR application, or VT1188SFQR equivalent, key selection criteria include initial accuracy, long-term drift, thermal hysteresis, load regulation, and compatibility with SAR ADC reference inputs.
Technical Context
The VT1188SFQR employs a proprietary curvature-corrected bandgap core with on-chip trimming for factory-set accuracy. Its output remains stable under load currents from 0 mA to 10 mA and input supply variations from 4.5 V to 18 V.
Designed for ratiometric and non-ratiometric architectures, it features reverse-polarity protection, thermal shutdown, and no external capacitor requirement for stability - enabling direct connection to precision ADCs such as the AD7980 and AD7685.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±1.25 mV (0.05% max initial error at 25°C) |
| Tempco | 3 ppm/°C max (−40°C to +125°C, typical 1.5 ppm/°C) |
| Noise (0.1–10 Hz) | 1.2 μVpp (enables <18-bit effective resolution in 1 MSPS ADCs) |
| Long-Term Drift | 15 ppm/1000 hrs (measured over first 1000 hours, typical) |
| Load Regulation | 4 ppm/mA (output shift per mA load change, supports dynamic current draw) |
| Line Regulation | 5 ppm/V (output shift per volt input variation, stable across wide supply range) |
Pinout & Package
VT1188SFQR is housed in an 8-lead SOIC package (SOIC_N, 3.9 mm × 4.9 mm, 1.27 mm pitch) with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 4.5 V to 18 V; internal regulator enables operation beyond reference output voltage |
| 2 (OUT) | Reference Output | Low-impedance 2.5 V source; drives ADC reference inputs directly without buffer |
| 3 (GND) | Analog Ground | Dedicated ground return path; separate from power ground to minimize noise coupling |
| 4 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines |
| 5 (TRIM) | Trim Adjustment | Factory-trimmed; not user-accessible; open during normal operation |
| 6 (SENSE) | Remote Sense Input | Enables Kelvin sensing to compensate for PCB trace IR drop in high-accuracy systems |
| 7 (SHDN) | Shutdown Control | Active-low logic input; reduces quiescent current to 1.5 μA when asserted |
| 8 (EPAD) | Thermal Pad | Internally connected to GND; requires soldered thermal via array for ≤40°C/W θJA |
Key Features
| Feature | Design Value |
|---|---|
| Initial accuracy of 0.05% | Reduces system calibration burden in automated test equipment and medical instrumentation |
| 3 ppm/°C tempco | Supports uncooled industrial sensors operating across −40°C to +125°C ambient |
| 1.2 μVpp low-frequency noise | Preserves ENOB in 18-bit SAR ADCs without external filtering or averaging |
| Integrated remote sense (SENSE pin) | Compensates for up to 50 mV IR drop in high-current reference distribution paths |
| Shutdown mode (1.5 μA IQ) | Enables power cycling in battery-powered portable data loggers between conversions |
Applications
| High-Accuracy Data Acquisition | Medical Instrumentation |
|---|---|
Use Scenario: 24-bit delta-sigma ADC front-end in weigh scale controller with auto-zero and gain calibration. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion reference and internal DAC calibration. Use Value: 0.05% initial accuracy and 3 ppm/°C tempco ensure measurement repeatability within ±0.005% FS over full temperature range. | Use Scenario: Portable ECG monitor with 500 ksps sampling and real-time ST-segment analysis. IC Role / Device Role / Timing Role: Stable 2.5 V reference for dual-channel simultaneous-sampling ADC and analog front-end biasing. Use Value: 1.2 μVpp noise prevents baseline wander masking low-amplitude QRS complexes below 10 μV. |
| Automated Test Equipment (ATE) | Industrial Process Control |
Use Scenario: Modular PXI card measuring thermocouple, RTD, and strain gauge signals with programmable gain. IC Role / Device Role / Timing Role: Precision reference shared across multiple ADC channels and calibration DACs. Use Value: Remote SENSE pin compensates for 35 mV trace drop across backplane, maintaining <0.01% reference error. | Use Scenario: Loop-powered 4–20 mA transmitter with HART modulation and local sensor diagnostics. IC Role / Device Role / Timing Role: Reference for 16-bit DAC generating precise current setpoints and internal ADC monitoring supply rails. Use Value: Shutdown mode reduces average current by 99.8% during sleep cycles, extending field battery life to >10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5 V output, 0.02% initial accuracy, 2 ppm/°C tempco, but higher 1.75 μVpp noise | Better accuracy/tempco, but higher noise limits use in sub-18-bit systems | Prefer ADR4525BRZ where absolute accuracy dominates over noise-limited resolution |
| REF5025AIDR | 2.5 V output, 0.05% initial accuracy, 3 ppm/°C tempco, 1.5 μVpp noise, no SENSE pin | Lacks remote sense; requires tighter layout control for <0.01% system error | Select REF5025AIDR when board space is constrained and trace resistance is <10 mΩ |
Compared with ADR4525BRZ and REF5025AIDR, the VT1188SFQR uniquely balances ultra-low noise, factory-trimmed accuracy, and integrated remote sensing-making it optimal for distributed reference architectures where trace IR drop and ADC ENOB both constrain system performance.
Availability
VT1188SFQR is available at Aetrix Electronics and suitable for high-accuracy data acquisition, medical instrumentation, and automated test equipment requiring stable component supply and long-term calibration integrity.
Supply support for VT1188SFQR 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
Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The VT1188SFQR belongs to Analog Devices' precision voltage reference product line, engineered for metrology-grade accuracy in instrumentation, industrial automation, and healthcare systems where DC stability defines measurement validity.
FAQ
What is the maximum load current supported by the VT1188SFQR?
The VT1188SFQR supports a continuous output current of up to 10 mA while maintaining specified accuracy and thermal stability. Load regulation is rated at 4 ppm/mA, meaning output voltage shifts by no more than 10 μV per mA of load change. This capability allows direct driving of multiple precision ADC reference inputs or low-power DACs without external buffering.
Does the VT1188SFQR require an external decoupling capacitor?
No, the VT1188SFQR is internally compensated and does not require an external output capacitor for stability. Its design eliminates capacitor-induced phase margin degradation and startup overshoot, simplifying layout and improving reliability in space-constrained applications. However, a 100 nF ceramic capacitor placed close to the VIN and GND pins is recommended for high-frequency supply noise rejection.
How does the SENSE pin function in the VT1188SFQR?
The SENSE pin on the VT1188SFQR enables true Kelvin sensing by monitoring voltage directly at the load point. When connected to the ADC reference input node, it closes a feedback loop that compensates for voltage drop across PCB traces or connectors. This maintains output accuracy even with trace resistances up to 5 Ω at 10 mA, delivering <0.01% system-level reference error without layout redesign.
What is the thermal performance of the VT1188SFQR in SOIC package?
In its standard 8-lead SOIC package with exposed pad, the VT1188SFQR achieves a junction-to-ambient thermal resistance (θJA) of ≤40°C/W when mounted with ≥4 thermal vias to an internal ground plane. Junction temperature rise remains below 25°C at 10 mA load and 25°C ambient, ensuring tempco and drift specifications remain valid without derating.
Is the VT1188SFQR qualified for automotive applications?
The VT1188SFQR is not AEC-Q200 qualified and is specified for industrial temperature range (−40°C to +125°C), not automotive grade. While it operates reliably across that range, Analog Devices does not certify it for automotive use cases requiring PPAP documentation, extended reliability testing, or zero-defect manufacturing traceability. For automotive designs, consider the ADR4525B or AD1582 series instead.
VT1188SFQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
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- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
VT1188SFQR FAQ
1.How can I place an order for VT1188SFQR through Aetrix?
Please submit a Request for Quotation (RFQ) for VT1188SFQR 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 VT1188SFQR reliable?
The price and inventory of VT1188SFQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VT1188SFQR is usually 5 days.
3.What payment methods are accepted for VT1188SFQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VT1188SFQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VT1188SFQR?
VT1188SFQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VT1188SFQR 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 VT1188SFQR?
For technical support, including VT1188SFQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VT1188SFQR requirements.
6.How does Aetrix verify that VT1188SFQR is sourced from the original manufacturer or authorized distributors?
All VT1188SFQR 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 VT1188SFQR meets industry standards.
7.What is the process for return or replacement of VT1188SFQR?
All VT1188SFQR units undergo pre-shipment inspection (PSI). If there is an issue with VT1188SFQR, 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 VT1188SFQR part is unused and in its original packaging.
Return procedure for VT1188SFQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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