Overview
The LMH6517SQ/NOPB, produced by Texas Instruments, is a high-performance, digitally controlled variable gain amplifier (DVGA) designed for use in narrowband and broadband IF sampling applications. This device contains two channels, each with an independent, digitally controlled attenuator and a high linearity, differential output amplifier. It is optimized for low distortion and maximum system design flexibility, making it suitable for a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range.
Key Specifications
| Parameter | Value |
|---|---|
| OIP3 | 43dBm @ 200MHz |
| Noise Figure | 5.5dB |
| Gain Step Size | 0.5dB |
| Gain Step Accuracy | 0.05dB |
| Frequency Range | Up to 1200 MHz |
| Supply Current per Channel | 80mA |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 32-Pin, thermally enhanced WQFN |
| Supply Voltage | Single 5V |
Key Features
- Accurate, 0.5dB Gain Steps
- 200Ω Resistive, Differential Input
- Low Impedance, Differential Output
- Disable Function for Each Channel
- Parallel Gain Control
- SPI Compatible Serial Bus
- Two Wire, Pulse Mode Control
- On Chip Register Stores Gain Setting
- Low Sensitivity of Linearity and Phase to Gain Setting
- Small Footprint WQFN Package
Applications
The LMH6517 is typically used in mixed signal and digital communication applications, including:
- Mobile radio systems
- Cellular base stations
- IF sampling receivers
- High-performance ADC drivers in various communication systems
These applications benefit from the device's automatic gain control (AGC) capabilities, which help increase the system's dynamic range.
Q & A
- What is the primary function of the LMH6517?
The LMH6517 is a digitally controlled variable gain amplifier (DVGA) designed for use in narrowband and broadband IF sampling applications.
- What is the gain step size and accuracy of the LMH6517?
The gain step size is 0.5dB with an accuracy of 0.05dB.
- What is the frequency range of the LMH6517?
The frequency range is up to 1200 MHz.
- What is the operating temperature range of the LMH6517?
The operating temperature range is -40°C to +85°C.
- What type of package does the LMH6517 come in?
The LMH6517 comes in a 32-Pin, thermally enhanced WQFN package.
- What is the supply voltage for the LMH6517?
The supply voltage is a single 5V.
- Can each channel of the LMH6517 be individually disabled?
- What type of control interfaces does the LMH6517 support?
The LMH6517 supports SPI compatible serial bus and two-wire, pulse mode control.
- What is the typical application of the LMH6517 in communication systems?
The LMH6517 is typically used to drive high-performance ADCs in mobile radio and cellular base stations.
- Does the LMH6517 have on-chip storage for gain settings?
