Overview
The AD8370AREZ, manufactured by Analog Devices Inc., is a high-performance, digitally controlled variable gain amplifier (VGA). This device is designed for use at intermediate frequencies (IF) within communication infrastructure equipment. It offers precision gain control, high third-order intercept point (IP3), and a low noise figure, making it suitable for modern receiver designs. The AD8370 operates on a single 3 V to 5 V supply and is packaged in a compact, thermally enhanced 16-lead TSSOP package, ensuring reliable operation over a temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Gain Range (Low Mode) | -11 | +17 | dB | ||
| Gain Range (High Mode) | 6 | 34 | dB | ||
| Differential Input Impedance | 200 | Ω | |||
| Differential Output Impedance | 100 | Ω | |||
| Noise Figure @ Maximum Gain | 7 | dB | |||
| Two-tone IP3 @ 70 MHz | 35 | dBm | |||
| 3 dB Bandwidth | 750 | MHz | |||
| Supply Voltage | 3 | 5.5 | V | ||
| Quiescent Current | 78 | mA | |||
| Operating Temperature Range | -40 | +85 | °C |
Key Features
- Precision gain control through a serial 8-bit digital interface
- Two gain ranges: low gain mode (-11 dB to +17 dB) and high gain mode (6 dB to 34 dB)
- High IP3 of 35 dBm @ 70 MHz and low noise figure of 7 dB
- Wide input dynamic range and excellent distortion performance
- Single 3 V to 5 V supply and low power consumption (less than 4 mA in power-down mode)
- Compact, thermally enhanced 16-lead TSSOP package
- Power-down feature with excellent input to output isolation and preserved gain setting
Applications
- Differential ADC drivers
- IF sampling receivers
- RF/IF gain stages
- Cable and video applications
- SAW filter interfacing
- Single-ended-to-differential conversion
- Digital receiver AGC circuits for GSM, CDMA2000, W-CDMA cellular base stations
Q & A
- What is the operating temperature range of the AD8370AREZ?
The AD8370AREZ operates over a temperature range of −40°C to +85°C.
- What are the gain ranges of the AD8370AREZ?
The AD8370AREZ has two gain ranges: low gain mode (-11 dB to +17 dB) and high gain mode (6 dB to 34 dB).
- What is the noise figure of the AD8370AREZ at maximum gain?
The noise figure at maximum gain is 7 dB.
- What is the two-tone IP3 of the AD8370AREZ at 70 MHz?
The two-tone IP3 at 70 MHz is 35 dBm.
- What is the 3 dB bandwidth of the AD8370AREZ?
The 3 dB bandwidth is 750 MHz.
- How is the gain controlled in the AD8370AREZ?
The gain is controlled through a serial 8-bit digital interface.
- What is the quiescent current of the AD8370AREZ?
The quiescent current is typically 78 mA.
- What is the power consumption in power-down mode?
The power consumption in power-down mode is less than 4 mA.
- What are some common applications of the AD8370AREZ?
Common applications include differential ADC drivers, IF sampling receivers, RF/IF gain stages, cable and video applications, and SAW filter interfacing.
- What package type is the AD8370AREZ available in?
The AD8370AREZ is available in a compact, thermally enhanced 16-lead TSSOP package.
