Overview
The DRV2700RGPR, produced by Texas Instruments, is a versatile single-chip piezo driver designed for driving both high-voltage and low-voltage piezoelectric loads. This device integrates a 105-V boost switch, a power diode, and a fully-differential amplifier. It supports various configurations, including 100-V boost or 1-kV flyback, and offers four GPIO-controlled gains. The DRV2700 is optimized for efficiency with a hysteretic boost design, minimizing switching losses and ensuring fast startup times.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 3.3 | 5.5 | 6 | V |
| Boost Voltage (BST) | 15 | - | 105 | V |
| Differential Input Voltage (IN+, IN-) | 1.8 | - | - | V |
| Digital Input Low Voltage (EN, GAIN0, GAIN1) | 0.75 | - | - | V |
| Digital Input High Voltage (EN, GAIN0, GAIN1) | 1.4 | - | - | V |
| Current-Limit Control Resistor (R(REXT)) | 6 | - | 35 | kΩ |
| Inductance for Boost Converter | 3.3 | - | - | µH |
| Operating Free-Air Temperature | -40 | - | 85 | °C |
| Operating Junction Temperature | -40 | - | 150 | °C |
Key Features
- Integrated Boost Converter: Capable of boosting up to 105 V with a hysteretic architecture to minimize switching losses and increase efficiency.
- Fully-Differential Amplifier: Provides improved common-mode rejection ratio (CMRR) and reduced sensitivity to ground offset noise.
- GPIO-Controlled Gains: Supports four adjustable gains (28.8 dB, 34.8 dB, 38.4 dB, and 40.7 dB) through GPIO pins.
- Programmable Boost Current-Limit: Set using the R(REXT) resistor to optimize the circuit for specific performance requirements.
- Fast Startup Time: Typical startup time of 1.5 ms, ideal for applications requiring quick responses.
- Thermal Overload Protection: Prevents device damage when overdriven.
- Flexible Input Signal: Can be either differential or single-ended, and AC or DC coupled.
Applications
- Piezoelectric Transducers: Suitable for driving piezoelectric actuators, sensors, and micropumps.
- Industrial Automation: Used in various industrial automation applications requiring precise control over high-voltage loads.
- Medical Devices: Applicable in medical devices such as ultrasound equipment and other medical actuators.
- Aerospace and Defense: Can be used in aerospace and defense applications where high reliability and precision are critical.
Q & A
- What is the maximum boost voltage of the DRV2700?
The DRV2700 can boost up to 105 V.
- How many GPIO-controlled gains does the DRV2700 support?
The DRV2700 supports four GPIO-controlled gains: 28.8 dB, 34.8 dB, 38.4 dB, and 40.7 dB.
- What is the typical startup time of the DRV2700?
The typical startup time is 1.5 ms.
- How is the boost current-limit programmed in the DRV2700?
The boost current-limit is programmed using the R(REXT) resistor.
- What type of amplifier is integrated in the DRV2700?
The DRV2700 integrates a fully-differential amplifier.
- What is the operating free-air temperature range of the DRV2700?
The operating free-air temperature range is from -40°C to 85°C.
- Does the DRV2700 have thermal overload protection?
- Can the input signal be single-ended or differential?
- What is the purpose of the PVDD pin in the DRV2700?
The PVDD pin is used to supply the high-voltage amplifier, located next to the BST pin to minimize routing inductance and resistance.
- What are some common applications of the DRV2700?
The DRV2700 is commonly used in applications involving piezoelectric transducers, industrial automation, medical devices, and aerospace and defense.
