Overview
The LMH6517SQX/NOPB, produced by National Semiconductor (now part of Texas Instruments), is a low power, low noise, dual 16-bit ADC driver IC. This component is designed for use in narrowband and broadband IF sampling applications, particularly in mixed signal and digital communication systems such as mobile radio and cellular base stations. It features two high-performance, digitally controlled variable gain amplifiers (DVGA) with precise gain control and low distortion, making it ideal for applications requiring automatic gain control (AGC) to enhance system dynamic range.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Impedance | 200Ω | Ohms |
| Gain Range | +22 dB to -9.5 dB | dB |
| Gain Step Size | 0.5 dB | dB |
| Gain Step Accuracy | 0.05 dB | dB |
| Output Third Order Intercept Point (OIP3) | 43 dBm @ 200 MHz | dBm |
| Noise Figure | 5.5 dB | dB |
| Supply Voltage | 4.5 V to 5.25 V | V |
| Supply Current per Channel | 80 mA (typical), 91 mA (maximum) | mA |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 32-Pin, thermally enhanced WQFN |
Key Features
- Dual 16-bit ADC driver with digitally controlled variable gain amplifiers (DVGA)
- Precise 0.5 dB gain steps over a 31.5 dB range
- Low impedance, differential output
- Disable function for each channel to save power
- SPI compatible serial bus and parallel gain control
- Two-wire, pulse mode control for simple gain adjustments
- On-chip register to store gain settings
- Low distortion and high linearity
- Single 5V supply voltage
- Small footprint WQFN package
Applications
- Cellular base stations
- IF sampling receivers
- Instrumentation
- Modems
- Imaging systems
Q & A
- What is the primary function of the LMH6517SQX/NOPB?
The LMH6517SQX/NOPB is a dual 16-bit ADC driver IC designed to drive high-performance ADCs in mixed signal and digital communication applications.
- What is the gain range of the LMH6517SQX/NOPB?
The gain range is from +22 dB to -9.5 dB with 0.5 dB gain steps.
- What is the input impedance of the LMH6517SQX/NOPB?
The input impedance is 200Ω.
- What is the noise figure of the LMH6517SQX/NOPB?
The noise figure is 5.5 dB.
- What is the operating temperature range of the LMH6517SQX/NOPB?
The operating temperature range is -40°C to +85°C.
- What type of package does the LMH6517SQX/NOPB come in?
The component comes in a 32-Pin, thermally enhanced WQFN package.
- How is the gain controlled in the LMH6517SQX/NOPB?
The gain is controlled through a SPI compatible serial bus and parallel gain control, as well as a two-wire, pulse mode control.
- Can each channel of the LMH6517SQX/NOPB be disabled independently?
Yes, each channel can be disabled independently to save power.
- What is the typical supply current per channel for the LMH6517SQX/NOPB?
The typical supply current per channel is 80 mA.
- In what applications is the LMH6517SQX/NOPB commonly used?
The LMH6517SQX/NOPB is commonly used in cellular base stations, IF sampling receivers, instrumentation, modems, and imaging systems.
