Special Purpose Amplifiers 900MHz, Digitally Controlled, Variable Gain Amplifier 16-WQFN -40℃ to 85℃
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LMH6518SQ/NOPB Product Details
The LMH6518SQ/NOPB device is a digitally controlled variable gain amplifier whose total gain is varied from ?1.16 dB to 38.8 dB for a 40 dB range in 2-dB steps. The ?3-dB bandwidth is 900 MHz at all gains. Gain accuracy at each setting is typically 0.1 dB. When used in conjunction with TI's Gsample/second (Gsps) ADC with adjustable full-scale (FS) range, the LMH6518SQ/NOPB gain adjustment accommodates full scale input signals from 6.8 mVPP to 920 mVPP to get 700 mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and ?OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry but may have other uses in other applications.
The LMH6518SQ/NOPB gain is programmed through a SPI-1 compatible serial bus. A signal path combined gain resolution of 8.5 mdB is achieved when the device's gain and the Gsps ADC’s FS input are both manipulated. Inputs and outputs are DC-coupled. The outputs are differential with individual common mode (CM) voltage control (for main and auxiliary outputs), and have a selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20, 100, 200, 350, 650, 750 MHz or full bandwidth.
- Gain Range: 40 dB
- Gain Step Size: 2 dB
- Combined Gain Resolution With Gsps ADCs: 8.5 mdB
- Minimum Gain: ?1.16 dB
- Maximum Gain: 38.8 dB
- ?3 dB BW: 900 MHz
- Rise and Fall Time: <500 ps
- Recovery Time: <5 ns
- Propagation Delay Variation: 100 ps
- HD2 at 100 MHz: ?50 dBc
- HD3 at 100 MHz: ?53 dBc
- Input-Referred Noise (Maximum Gain): 0.98 nV/√Hz
- Overvoltage Clamps for Fast Recovery
- Power Consumption: Auxiliary Turned Off 1.1 W to 0.75 W
The LMH6518 device is a digitally controlled variable gain amplifier whose total gain is varied from ?1.16 dB to 38.8 dB for a 40 dB range in 2-dB steps. The ?3-dB bandwidth is 900 MHz at all gains. Gain accuracy at each setting is typically 0.1 dB. When used in conjunction with TI's Gsample/second (Gsps) ADC with adjustable full-scale (FS) range, the LMH6518 gain adjustment accommodates full scale input signals from 6.8 mVPP to 920 mVPP to get 700 mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and ?OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry but may have other uses in other applications.
The LMH6518 gain is programmed through a SPI-1 compatible serial bus. A signal path combined gain resolution of 8.5 mdB is achieved when the device's gain and the Gsps ADC’s FS input are both manipulated. Inputs and outputs are DC-coupled. The outputs are differential with individual common mode (CM) voltage control (for main and auxiliary outputs), and have a selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20, 100, 200, 350, 650, 750 MHz or full bandwidth.
- Number of Channels
- Common Mode Rejection Ratio (Min)
- 40 dB
- Operating Supply Voltage
- 3.3 V, 5 V
- Supply Current
- 225 mA at 5 V
- Maximum Operating Temperature
- + 85 C
- Minimum Operating Temperature
- - 40 C
- Package / Case
- LLP EP
- Available Set Gain
- 40 dB
- Factory Pack Quantity
- Supply Voltage Max
- 5.25 V
- Supply Voltage Min
- 3.135 V
LMH6518 Family Datasheet
LMH6518SQ/NOPB Related Products
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