Overview
The AD7740YRM, produced by Analog Devices Inc., is a low-cost, ultrasmall synchronous Voltage-to-Frequency Converter (VFC). This device is designed for applications requiring compact size, low power consumption, and ease of use. It operates from a single supply voltage of 3.0 V to 3.6 V or 4.75 V to 5.25 V and consumes typically 0.9 mA of current. The AD7740YRM is available in 8-lead SOT-23 and 8-lead MSOP packages, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 8-Lead SOT-23, 8-Lead MSOP |
| Supply Voltage | 3.0 V to 3.6 V or 4.75 V to 5.25 V |
| Supply Current | Typically 0.9 mA |
| Input Type | Single-Ended |
| Input Range | 0 to VREF (up to VDD - 0.2 V in buffered mode, -0.15 V to VDD + 0.15 V in unbuffered mode) |
| Output Frequency (Max) | 1 MHz |
| Linearity | ±0.012% to ±0.018% |
| Operating Temperature Range | -40°C to +105°C (Y Grade), 0°C to +85°C (K Grade) |
| RoHS Compliance | Compliant |
Key Features
- Synchronous operation with external system clock.
- Internal 2.5 V reference voltage, with the option to use an external reference.
- Low power consumption: 3 mW typical.
- High input impedance in buffered mode.
- No external resistors or capacitors required to set the output frequency.
- Automatic power-down function.
- True bipolar input capability without a charge pump.
- Minimal external components required.
Applications
- Isolation of high common-mode voltages.
- Low-cost analog-to-digital conversion.
- Battery monitoring.
- Automotive sensing.
- FM demodulation.
- Frequency meters/tachometers.
- Hand-held tachometers.
- Breaker point dwell meters.
- 13-bit analog-to-digital converters (ADC).
Q & A
- What is the AD7740YRM and what is its primary function?
The AD7740YRM is a synchronous Voltage-to-Frequency Converter (VFC) that converts an analog input voltage to a proportional output frequency.
- What are the available package types for the AD7740YRM?
The AD7740YRM is available in 8-lead SOT-23 and 8-lead MSOP packages.
- What is the supply voltage range for the AD7740YRM?
The supply voltage range is 3.0 V to 3.6 V or 4.75 V to 5.25 V.
- How much current does the AD7740YRM typically consume?
The AD7740YRM typically consumes 0.9 mA of current.
- What is the maximum output frequency of the AD7740YRM?
The maximum output frequency is 1 MHz.
- Does the AD7740YRM require external components to set the output frequency?
No, the AD7740YRM does not require external resistors or capacitors to set the output frequency.
- What are the operating temperature ranges for the AD7740YRM?
The operating temperature range is -40°C to +105°C for the Y Grade and 0°C to +85°C for the K Grade.
- Is the AD7740YRM RoHS compliant?
- What are some common applications of the AD7740YRM?
- Can the AD7740YRM handle bipolar input voltages?
