Precision window supervisor for OV & UV monitoring with window watchdog timer & programmable delay
Product details
Parameters
Package | Pins | Size
Features
- 0.8% Voltage Threshold Accuracy
- Precision Over- and Undervoltage Monitoring:
- Supports Common Rails from 0.9 V to 5.0 V
- ±4% and ±7% Fault Windows Available
- 0.5% Hysteresis
- Factory-Programmed Precision Watchdog and Reset Timers:
- ±15% Accurate WDT and RST Delays
- Watchdog Disable Feature
- User-Programmable Watchdog Timeout
- User-Programmable Reset Delay
- Input Voltage Range: VDD = 1.6 V to 6.5 V
- Low Supply Current: IDD = 10 µA (typ)
- Open-Drain Outputs
- Available in a Small 3-mm × 3-mm, 10-Pin VSON Package
- Junction Operating Temperature Range:
–40°C to +125°C
Description
The TPS3850 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds. The TPS3850 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 15% accuracy, high-precision delay timing.
The TPS3850 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.
The TPS3850 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package.
Exact equivalent in functionality and parametrics to the compared device:
Similar but not functionally equivalent to the compared device:
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TPS3850 Precision Voltage Supervisor with Programmable Window Watchdog Timer datasheet (Rev. A) | Nov. 10, 2016 |
Application note | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | Mar. 17, 2020 | |
E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | Jun. 28, 2019 | |
Application note | Comparing Voltage and Processor Monitoring Solutions | Apr. 05, 2019 | |
Application note | How Comparator Topology Influences Propagation Delay | Apr. 05, 2017 | |
Technical article | Exploring watchdog timer applications | Feb. 02, 2017 | |
User guide | TPS3850EVM-781 Evaluation Module | Oct. 24, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- High threshold accuracy: 0.8%
- User-programmable watchdog timer
- User-programmable reset delay
- Open-drain RESET output
- Independent open-drain watchdog output
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-01589 BOM Files.zip (285KB) -
download TIDA-01589 Assembly Files.zip (428KB) -
download TIDA-01589 Layer Plots.zip (1926KB) -
download TIDA-01589 CAD Files.zip (3682KB) -
download TIDA-01589 Gerber.zip (1589KB)
Design files
-
download TIDA-01639 BOM.pdf (64KB) -
download TIDA-01639 Assembly Drawing.pdf (497KB) -
download TIDA-01639 PCB.pdf (2429KB) -
download TIDA-01639 CAD Files.zip (3608KB) -
download TIDA-01639 Gerber.zip (2362KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSON (DRC) | 10 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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