Overview
The AD8369ARU, produced by Analog Devices Inc., is a high-performance, digitally controlled variable gain amplifier (VGA). This device is designed for use from low frequencies up to a –3 dB frequency of 600 MHz at all gain codes. It features a 45 dB gain control range, adjustable in 3 dB increments, making it ideal for applications requiring precise gain control. The AD8369ARU is fabricated on Analog Devices' proprietary 25 GHz silicon bipolar IC process and is available in a 16-lead TSSOP package, suitable for the industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Frequency Range | 600 | MHz | |||
| Voltage Gain Span | -5 | 40 | dB | ||
| Gain Flatness | Within ±20 MHz of 380 MHz | ±0.15 | dB | ||
| Noise Figure | At maximum gain | 7 | dB | ||
| Output IP3 | At 70 MHz into 1 kΩ load | +19.5 | dBm | ||
| Supply Voltage | 3.0 | 5.5 | V | ||
| Quiescent Current | At 5 V, 25°C | 37 | mA | ||
| Power-Down Current | <1 | mA |
Key Features
- Digitally controlled variable gain in 3 dB steps over a 45 dB span
- 4-bit parallel or 3-wire serial interface for gain control
- Differential 200 Ω input and output impedance
- Single 3.0 V to 5.5 V supply operation
- Low power consumption: 37 mA at 5 V, <1 mA in power-down mode
- Excellent distortion performance: –69 dBc two-tone, third-order intermodulation distortion at 70 MHz
- High gain stability and flatness: <0.1 dB over a 20 MHz channel bandwidth at 380 MHz
- Available in a 16-lead TSSOP package for industrial temperature range of –40°C to +85°C
Applications
- Cellular/PCS base stations
- IF sampling receivers
- Fixed wireless access
- Wireline modems
- Instrumentation
- Digital IF receivers
Q & A
- What is the frequency range of the AD8369ARU?
The AD8369ARU operates from low frequencies up to a –3 dB frequency of 600 MHz.
- What is the gain control range of the AD8369ARU?
The gain control range is 45 dB, adjustable in 3 dB increments.
- What types of interfaces are available for gain control?
The AD8369ARU supports both 4-bit parallel and 3-wire serial interfaces for gain control.
- What is the input and output impedance of the AD8369ARU?
The input and output impedance is 200 Ω differential.
- What is the supply voltage range for the AD8369ARU?
The device operates on a single supply voltage from 3.0 V to 5.5 V.
- How much current does the AD8369ARU consume in normal operation and power-down mode?
In normal operation, it consumes 37 mA at 5 V, and less than 1 mA in power-down mode.
- What is the distortion performance of the AD8369ARU?
The device has a two-tone, third-order intermodulation distortion of –69 dBc at 70 MHz.
- What is the noise figure of the AD8369ARU at maximum gain?
The nominal noise figure is 7 dB at maximum gain.
- What is the output IP3 of the AD8369ARU at 70 MHz?
The output IP3 is +19.5 dBm at 70 MHz into a 1 kΩ load.
- In what package is the AD8369ARU available?
The device is available in a 16-lead TSSOP package.
