Overview
The AD7740YRMZ-REEL, produced by Analog Devices Inc., is a low-cost, ultrasmall synchronous Voltage-to-Frequency Converter (VFC). This component is designed for space-saving and ease of use, making it ideal for various low-cost applications. It is available in 8-lead SOT-23 and 8-lead MSOP packages, ensuring flexibility in design and implementation. The AD7740 operates from a single supply voltage of either 3.0 V to 3.6 V or 4.75 V to 5.25 V, consuming a typical current of 0.9 mA, and includes an automatic power-down function for energy efficiency.
Key Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V or 4.75 V to 5.25 V |
| Current Consumption | Typically 0.9 mA |
| Package Types | 8-lead SOT-23, 8-lead MSOP |
| Maximum Input Frequency | 1 MHz |
| Output Frequency Range | 10% to 90% of fCLKIN |
| Input Voltage Range (Buffered Mode) | 0.1 V to VDD - 0.2 V |
| Input Voltage Range (Unbuffered Mode) | -0.15 V to VDD + 0.15 V |
| Temperature Range (Y Grade) | -40°C to +105°C |
| Temperature Range (K Grade) | 0°C to 85°C |
Key Features
- Synchronous operation with the clock signal on the CLKIN pin, allowing for precise control over the output frequency.
- No external resistors or capacitors are required to set the output frequency, simplifying the design process.
- Automatic power-down function for reduced power consumption.
- High input impedance in buffered mode and the ability to operate in unbuffered mode for a wider input voltage range.
- True bipolar operation with the ability to take the analog input to 150 mV below GND.
- On-chip 2.5 V bandgap reference, which can be overdriven by an external reference.
Applications
- Isolated analog signal transmission applications, where noise, safety requirements, or distance necessitate isolation from controlling circuitry.
- Low-cost, space-constrained designs where a compact and efficient VFC is required.
- Applications requiring high-resolution analog-to-digital conversion, where the AD7740 can act as a voltage-controlled frequency divider).
Q & A
- What is the AD7740YRMZ-REEL? The AD7740YRMZ-REEL is a low-cost, ultrasmall synchronous Voltage-to-Frequency Converter (VFC) produced by Analog Devices Inc..
- What are the available package types for the AD7740? The AD7740 is available in 8-lead SOT-23 and 8-lead MSOP packages).
- What is the supply voltage range for the AD7740? The AD7740 operates from a single supply voltage of either 3.0 V to 3.6 V or 4.75 V to 5.25 V).
- What is the typical current consumption of the AD7740? The AD7740 consumes a typical current of 0.9 mA).
- What is the maximum input frequency for the AD7740? The maximum input frequency for the AD7740 is 1 MHz).
- Can the AD7740 operate in both buffered and unbuffered modes? Yes, the AD7740 can operate in both buffered and unbuffered modes, allowing for different input voltage ranges).
- What is the temperature range for the Y Grade and K Grade of the AD7740? The Y Grade is guaranteed over the temperature range of -40°C to +105°C, while the K Grade is guaranteed from 0°C to 85°C).
- Does the AD7740 require external resistors or capacitors to set the output frequency? No, the AD7740 does not require external resistors or capacitors to set the output frequency).
- Can the AD7740 be used in isolated analog signal transmission applications? Yes, the AD7740 can be used in isolated analog signal transmission applications due to its design and capabilities).
- What is the purpose of the on-chip 2.5 V bandgap reference in the AD7740? The on-chip 2.5 V bandgap reference provides a stable voltage reference, which can also be overdriven by an external reference if needed).
