Texas Instruments TPS3851/TPS3851-Q1 Precision Voltage Supervisors
Texas Instruments TPS3851/TPS3851-Q1 Precision Voltage Supervisors combine a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold. The TPS3851 also includes accurate hysteresis on the undervoltage threshold, making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy and high-precision delay timing. The TPS3851/TPS3851-Q1 includes a programmable watchdog timer for various applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. Watchdog timeouts can be programmed either by an external capacitor or factory-programmed default delay settings. The TPS3851-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- 0.8% Voltage threshold accuracy
- Precision undervoltage monitoring
- Supports common rails from 1.8V to 5.0V
- 4% and 7% Undervoltage thresholds available
- 0.5% Hysteresis
- Factory-programmed precision watchdog and reset timers
- ±15% Accurate WDT and RST delays
- Watchdog disable feature
- User-programmable watchdog timeout
- VDD = 1.6V to 6.5V Input voltage range
- IDD = 10µA (typ) Low quiescent current
- Open-drain outputs
- Manual Reset input (MR)
- Available in a small 3mm × 3mm, 8-Pin VSON package
- –40°C to +125°C Junction operating temperature range
Applications
- Safety-critical applications
- Telematics control units
- FPGAs and ASICs
- Microcontrollers and DSPs
Datasheets
Development Tool
Texas Instruments TPS3850EVM-781/TPS3851EVM-780 Supervisor EVM
For a typical configuration to evaluate the operation and performance of the TPS3850/TPS3851.
Publicerad: 2017-10-04
| Uppdaterad: 2022-06-22