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 |
| | Single 5V supply voltage |
| | Small footprint LLP package |
Description The LMH6517 contains two high performance digitally controlled variable gain amplifiers (DVGA). It has been designed for use
in narrowband and broadband IF sampling applications. Typically the LMH6517 drives a high performance ADC in 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.
Each channel of LMH6517 has an independent digitally controlled attenuator and a high linearity, differential output amplifier.
Each block has been optimized for low distortion and maximum system design flexibility. Each channel can be individually
disabled for power savings.
The LMH6517 digitally controlled attenuator provides precise 0.5dB gain steps over a 31.5dB range. On chip digital latches
are provided for local storage of the gain setting. Both serial and parallel programming options are provided. A Pulse
mode is also offered where simple up or down commands can change the gain one step at a time.
The output amplifier has a differential output allowing large signal swings on a single 5V supply. The low impedance output
provides maximum flexibility when driving filters or analog to digital converters.
The LMH6517 operates over the industrial temperature range of −40°C to +85°C. The LMH6517 is available in a 32-Pin, thermally
enhanced, LLP package.
Key Specification
| | OIP3: 44dBm @ 200MHz |
| | Noise figure 5.5dB |
| | Gain step size of 0.5dB |
| | Gain step accuracy: 0.05dB |
| | Frequency Range of 1200 MHz |
| | Supply current 80mA per channel |
Applications
| | Cellular base stations |
| | IF sampling receivers |
| | Instrumentation |
| | Modems |
| | Imaging |
|
Also Recommended
| ADC16DV160 | High-performance Dual 16-bit, 160-MSPS ADC |
| ADC16V130 | 16-Bit, 130 MSPS A/D Converter To Complete Signal Path |
| LMK04000 | Precision Clock Conditioner With Dual PLL |
|
Typical Application
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