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STMicroelectronics TS3312AQPR
- Part No.:
- TS3312AQPR
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 8-UFQFN
- Datasheet:
-
TS3312AQPR.pdf
- Description:
- IC VREF SERIES 1.25V 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,865
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Product details
Overview
TS3312AQPR from STMicroelectronics is a micropower, high-precision series voltage reference delivering a stable 1.25 V output with ±0.15 % initial accuracy, 3.9 μA typical quiescent current at 25 °C, and 30 ppm/°C max temperature coefficient over –40 to +125 °C. It operates from 1.8 V input and supports ±5 mA load current, making it suitable for portable medical sensors and battery-powered data acquisition front-ends.
For engineers reviewing the TS3312AQPR datasheet, TS3312AQPR pinout, TS3312AQPR application, or TS3312AQPR equivalent, key selection criteria include ultra-low IQ, tight initial tolerance, capacitive-load stability, extended temperature performance, and QFN8 1.5×1.5 mm package compatibility with space-constrained PCB layouts.
Technical Context
The TS3312AQPR is a bandgap-based series voltage reference optimized for low-power precision analog systems. Its architecture enables stable regulation with no external compensation required, even under 0.1–10 µF ceramic capacitive loads, and maintains monotonic behavior across full temperature and load ranges.
It features internal short-circuit protection (35 mA limit), turn-on settling time of 2 ms to 0.1 % with 1 µF output capacitor, and low-frequency noise of 27 µVP-P (0.1–10 Hz). Dropout voltage remains ≤160 mV at ±5 mA load across –40 to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25 V - fixed, factory-trimmed reference ideal for ADC/DAC biasing and sensor excitation circuits. |
| Initial Accuracy | ±0.15 % - ensures <±1.88 mV absolute error at 25 °C, reducing calibration burden in high-resolution measurement systems. |
| Quiescent Current | 3.9 μA (typ.) - enables >10-year battery life in coin-cell–powered instrumentation with minimal standby drain. |
| Temp Coefficient | 30 ppm/°C max (–40 to +125 °C) - contributes ≤37.5 ppm total drift over full range, supporting 16-bit+ system accuracy. |
| Load Regulation | ±20 ppm/mA (–40 to +125 °C) - maintains output stability despite dynamic current draw in multiplexed sensor arrays. |
| Line Regulation | ±30 ppm/V (–40 to +125 °C) - rejects supply ripple without additional LDO filtering in noisy embedded power rails. |
| Capacitive Load Range | 0.1–10 µF - compatible with standard X7R ceramics, eliminating need for specialized low-ESR capacitors. |
Pinout & Package
TS3312AQPR is supplied in a wettable flank QFN8 package (1.5 × 1.5 mm, 0.4 mm pitch), optimized for automated optical inspection (AOI) and thermal performance. The exposed pad improves thermal dissipation (RthJA = 159 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 1.8–5.5 V input; dropout as low as 100 mV enables operation from single Li-ion or regulated 1.8 V rails. |
| 2 (OUT) | Reference Output | Provides low-noise, high-PSRR 1.25 V source; stable with 0.1–10 µF ceramic output capacitance. |
| 3 (GND) | Analog Ground | Low-impedance return path; must be connected directly to clean ground plane to minimize noise coupling. |
| 4–8 (NC) | No Connect | Internally unconnected; may be left floating or tied to GND per layout best practices for thermal/mechanical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 3.9 μA typ. - extends battery life in portable ECG monitors and handheld multimeters without sacrificing accuracy. |
| High-temperature stability | ±0.15 % over –40 to +125 °C - eliminates recalibration in automotive cabin sensors and industrial process transmitters. |
| Capacitive-load immunity | Stable with 0.1–10 µF X7R ceramics - removes need for external compensation networks in compact PCB designs. |
| Short-circuit protected | 35 mA current limit - prevents latch-up or damage during board-level test or transient fault conditions. |
| Fast turn-on settling | 2 ms to 0.1 % with 1 µF COUT - supports rapid power cycling in duty-cycled IoT sensor nodes. |
Applications
| Portable Medical Sensors | Data Acquisition Front-Ends |
|---|---|
|
Use Scenario: Battery-powered wearable ECG patch acquiring microvolt-level biopotentials. IC Role / Device Role / Timing Role: Provides stable 1.25 V reference for 24-bit delta-sigma ADC and op-amp signal conditioning chain. Use Value: ±0.15 % initial accuracy and 30 ppm/°C TC ensure <±1 LSB error over temperature, enabling clinical-grade waveform fidelity. |
Use Scenario: Modular industrial DAQ module measuring thermocouples and RTDs across wide ambient ranges. IC Role / Device Role / Timing Role: Supplies precision bias for programmable gain instrumentation amplifiers and ADC reference inputs. Use Value: Ultra-low 3.9 μA IQ minimizes self-heating drift, while capacitive-load stability simplifies layout in multi-channel mixed-signal PCBs. |
| Handheld Test Equipment | Automotive Cabin Sensors |
|
Use Scenario: Pocket-sized digital multimeter requiring accurate DC voltage and current measurement down to µA ranges. IC Role / Device Role / Timing Role: Serves as primary reference for autoranging ADC and shunt-based current sensing circuitry. Use Value: 27 µVP-P (0.1–10 Hz) low-frequency noise ensures resolution below 100 nV in 6½-digit measurement modes. |
Use Scenario: Occupant detection system using capacitive proximity sensing inside vehicle seats. IC Role / Device Role / Timing Role: Generates stable excitation voltage for capacitance-to-digital converter (CDC) front-end. Use Value: Extended –40 to +125 °C operation and 30 ppm/°C TC guarantee consistent sensitivity calibration across all vehicle operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6025AESA+ | 1.25 V, ±0.1 % initial accuracy, 6.5 μA IQ, SO-8 package | Higher accuracy but 66 % higher quiescent current and larger footprint | Preferred when sub-0.1 % tolerance is mandatory and board area/power budget allow. |
| REF3012AIDBZR | 1.25 V, ±0.2 % initial accuracy, 50 μA IQ, SOT23-3 package | Lower cost, wider availability, but 13× higher IQ and reduced temp range (–40 to +125 °C same) | Selected for cost-sensitive, non-battery applications where 50 μA IQ is acceptable. |
Compared with MAX6025AESA+, TS3312AQPR trades 0.05 % accuracy for 43 % lower IQ and 40 % smaller footprint; versus REF3012AIDBZR, it delivers 3.3× lower IQ and superior long-term stability-critical for field-deployed instrumentation.
Availability
TS3312AQPR is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and handheld test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TS3312AQPR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TS33 family belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy voltage references in space- and energy-constrained measurement systems.
FAQ
What is the minimum input voltage required for TS3312AQPR to regulate at 1.25 V?
The TS3312AQPR requires a minimum input voltage of 1.8 V to maintain regulation at 1.25 V output. At ±5 mA load and 25 °C, its dropout voltage is typically 100 mV, meaning VIN ≥ 1.35 V is sufficient-but the datasheet specifies 1.8 V as the guaranteed minimum operating input across temperature and process corners.
Can TS3312AQPR drive a 10 µF ceramic output capacitor without oscillation?
Yes. The TS3312AQPR is explicitly characterized and guaranteed stable with output capacitance from 0.1 µF to 10 µF, including standard X7R dielectrics. Figure 18 (Stability Plan) in DS12001 confirms stable operation across this full range with no external compensation required.
Does TS3312AQPR have reverse-voltage protection on the IN pin?
No. Absolute maximum rating for IN is –0.3 V; applying reverse voltage beyond this risks permanent damage. External protection (e.g., series diode or TVS) is required if reverse polarity exposure is possible in the end application.
How does the 3.9 μA quiescent current vary across temperature?
Quiescent current increases with temperature: 4.4–7.5 μA over –40 to +85 °C, and 4.8–10 μA over –40 to +125 °C. This monotonic rise is fully specified and accounted for in battery-life calculations for long-duration deployments.
TS3312AQPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-UFQFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.15%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 27µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 1.8V ~ 5.5V
- Current - Supply:
- 10µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (1.5x1.5)
TS3312AQPR FAQ
1.How can I place an order for TS3312AQPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TS3312AQPR 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 TS3312AQPR reliable?
The price and inventory of TS3312AQPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS3312AQPR is usually 5 days.
3.What payment methods are accepted for TS3312AQPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS3312AQPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS3312AQPR?
TS3312AQPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS3312AQPR 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 TS3312AQPR?
For technical support, including TS3312AQPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS3312AQPR requirements.
6.How does Aetrix verify that TS3312AQPR is sourced from the original manufacturer or authorized distributors?
All TS3312AQPR 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 TS3312AQPR meets industry standards.
7.What is the process for return or replacement of TS3312AQPR?
All TS3312AQPR units undergo pre-shipment inspection (PSI). If there is an issue with TS3312AQPR, 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 TS3312AQPR part is unused and in its original packaging.
Return procedure for TS3312AQPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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