Overview
The TPS3840DL30DBVR, produced by Texas Instruments, is a nanopower, high-input voltage supervisor integrated circuit. This device is designed to monitor the supply voltage and provide a reset signal when the voltage falls below a predetermined threshold. It features a wide operating voltage range from 1.5 V to 10 V, making it versatile for various applications. The TPS3840DL30DBVR is particularly notable for its ultra-low power consumption, with a typical supply current of 300 nA, and its programmable reset time delay, which can be adjusted using an external capacitor.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Input Supply Voltage | 1.5 | 10 | V | |
| VIT- Negative-going Input Threshold Voltage | 1.6 | 4.9 | V | |
| Threshold Accuracy | -1.5% | 1% | 1.5% | % |
| Hysteresis (VHYS) | 75 mV (VIT- ≤ 3.0 V) 175 mV (VIT- > 3.0 V) | 100 mV (VIT- ≤ 3.0 V) 200 mV (VIT- > 3.0 V) | 125 mV (VIT- ≤ 3.0 V) 225 mV (VIT- > 3.0 V) | mV |
| IDD Supply Current | 300 nA | 700 nA | nA | |
| Start-up Delay (tSTRT) | 220 µs | 350 µs | µs | |
| Reset Time Delay (tD) | 50 µs (no capacitor) | 6.2 s (10-µF capacitor) | µs/s | |
| Operating Temperature Range | -40°C | 125°C | °C | |
| Package | SOT-23 (DBV) |
Key Features
- Wide operating voltage range: 1.5 V to 10 V
- Ultra-low power consumption: 300 nA (typical), 700 nA (maximum)
- Fixed threshold voltage (VIT-) from 1.6 V to 4.9 V in 0.1-V steps with high accuracy
- Programmable reset time delay using an external capacitor
- Active-low manual reset (MR) with built-in glitch immunity protection
- Three output topologies: open-drain active-low (TPS3840DL), push-pull active-low (TPS3840PL), and push-pull active-high (TPS3840PH)
- Wide temperature range: -40°C to +125°C
- Low open-drain output leakage current
Applications
- Grid infrastructure: circuit breakers, smart meters, and other monitoring and protection equipment
- Factory automation: field transmitters, PLCs
- Building automation: fire safety, smoke detectors, and HVAC systems
- Electronic point of sale systems
- Portable and battery-powered devices
Q & A
- What is the typical supply current of the TPS3840DL30DBVR?
The typical supply current is 300 nA. - What is the operating voltage range of the TPS3840DL30DBVR?
The operating voltage range is from 1.5 V to 10 V. - How can the reset time delay be adjusted?
The reset time delay can be adjusted using an external capacitor connected to the CT pin. - What are the different output topologies available for the TPS3840 series?
The available output topologies are open-drain active-low (TPS3840DL), push-pull active-low (TPS3840PL), and push-pull active-high (TPS3840PH). - What is the temperature range for the TPS3840DL30DBVR?
The operating temperature range is from -40°C to +125°C. - What is the package type of the TPS3840DL30DBVR?
The package type is SOT-23 (DBV) with 5 pins. - How does the manual reset (MR) function work?
The manual reset (MR) pin can be pulled to a logic low to assert a reset signal. If the MR pin is left floating or pulled to a logic high, the output releases to the nominal state after the reset time delay expires. - What kind of protection does the TPS3840DL30DBVR have against glitches?
The device has built-in glitch immunity protection for both the MR and VDD pins. - What are some common applications for the TPS3840DL30DBVR?
Common applications include grid infrastructure, factory automation, building automation, electronic point of sale systems, and portable devices. - How accurate is the threshold voltage of the TPS3840DL30DBVR?
The threshold voltage accuracy is typically 1% and maximally 1.5% over the operating temperature range.
