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Description
The AD8320 is a digitally controlled variable gain amplifier optimized for coaxial line driving applications. An 8-bit serial word determines the desired output gain over a 36 dB range (256 gain levels). The AD8320 provides linear gain response. It is made up of a digitally controlled variable attenuator of 0 dB to –36 dB, which is preceded by a low noise, fixed gain buffer and followed by a low distortion high power amplifier. The AD8320 has a 220 Ω input impedance and accepts a single-ended input signal with a specified analog input level of up to 0.310 V p-p. The output is specified for driving a 75 Ω load, such as coaxial cable, although the AD8320 is capable of driving other loads. Distortion performance of –57 dBc is achieved with an output level up to 12 dBm (3.1 V p-p) at 42 MHz, while –46 dBc distortion is achieved with an output level up to 18 dBm (6.2 V p-p).
Specifications and features
8-Bit Serial Gain Control, V/V/LSB Linear Gain Response, 36 dB Gain Range, ±0.20 dB Gain Accuracy, Upper Bandwidth: 150 MHz, 22 dBm 1 dB Compression Point (75 V), Drives Low Distortion Signals into 75 V Load: –57 dBc SFDR at 42 MHz and 12 dBm Out, –46 dBc SFDR at 42 MHz and 18 dBm Out, Single Supply Operation from 5 V to 12 V, Maintains 75 V Output Impedance Power-Up and Power-Down Condition, Supports SPI Input Control Standard.
Application Scenarios
Coaxial Cable Driver, HFC Cable Telephony Systems, HFC High-Speed Data Modems, Interactive Set-Top Boxes, PC Plug-In Modems, Interfaces with AD9853 I2C Controlled Digital Modulator, High-Performance Digitally Controlled Variable Gain Block.
Comparison
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Datasheet
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Popular parts of the same kind
- Datasheet: Download 8320ARP
- Chipdatas Part: CD94-8320ARP
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- Last Updated: 2024/05/21 05:54 +0800
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