Overview
The AD8370ARE, produced by Analog Devices Inc., is a high-performance, digitally controlled variable gain amplifier (VGA). This component is designed for use at intermediate frequencies (IF) within communication infrastructure equipment. It offers precision gain control, high linearity, and low noise figure, making it suitable for modern receiver designs. The AD8370ARE operates on a single 3V to 5V supply and is packaged in a compact, thermally enhanced 16-lead TSSOP package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain Range (Low Mode) | -11 dB to +17 dB | dB |
| Gain Range (High Mode) | 6 dB to 34 dB | dB |
| Noise Figure @ Maximum Gain | 7 dB | dB |
| Two-tone IP3 @ 70 MHz | 35 dBm | dBm |
| -3 dB Bandwidth | 750 MHz | MHz |
| Differential Input Impedance | 200 Ω | Ω |
| Differential Output Impedance | 100 Ω | Ω |
| Supply Voltage | 3 V to 5 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 16-lead TSSOP-EP | |
| Quiescent Current | 78 mA (typical) | mA |
Key Features
- Programmable low and high gain with <2 dB resolution
- Differential input and output
- High output compression point (+15.8 dBm at 70 MHz)
- Serial 8-bit digital interface for gain control
- Power-down feature with less than 4 mA current consumption
- Wide input dynamic range and excellent distortion performance
- Single-ended-to-differential conversion capability
- Fabricated on advanced silicon bipolar process
Applications
- Differential ADC drivers
- IF sampling receivers
- RF/IF gain stages
- Cable and video applications
- SAW filter interfacing
- Digital receiver AGC circuits for GSM, CDMA2000, W-CDMA cellular base stations
Q & A
- What is the gain range of the AD8370ARE?
The AD8370ARE has two gain ranges: -11 dB to +17 dB in low gain mode and 6 dB to 34 dB in high gain mode.
- What is the noise figure of the AD8370ARE at maximum gain?
The noise figure at maximum gain is 7 dB.
- What is the -3 dB bandwidth of the AD8370ARE?
The -3 dB bandwidth is 750 MHz.
- What is the differential input impedance of the AD8370ARE?
The differential input impedance is 200 Ω.
- What is the supply voltage range for the AD8370ARE?
The supply voltage range is 3 V to 5 V.
- What is the operating temperature range of the AD8370ARE?
The operating temperature range is -40°C to +85°C.
- What type of package does the AD8370ARE come in?
The AD8370ARE comes in a 16-lead TSSOP-EP package.
- How does the gain control work on the AD8370ARE?
The gain control is achieved through a serial 8-bit digital interface, allowing for precise linear gain steps.
- What are some common applications of the AD8370ARE?
Common applications include differential ADC drivers, IF sampling receivers, RF/IF gain stages, and digital receiver AGC circuits for cellular base stations.
- Does the AD8370ARE have a power-down feature?
Yes, the AD8370ARE has a power-down feature that reduces current consumption to less than 4 mA.
