Overview
The AD8313ARMZ from Analog Devices Inc. is a highly advanced 8-stage logarithmic amplifier designed for a wide range of RF measurement and control applications. This component accurately converts RF signals into equivalent decibel-scaled values at its DC output, maintaining high log conformance over frequencies from 0.1 GHz to 2.5 GHz. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and is packaged in an 8-lead MSOP, making it compact and versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Frequency Range | 0.1 GHz | 2.5 GHz | ||
| Dynamic Range | -65 dBm | 0 dBm | ||
| Accuracy | ±1.0 dB | |||
| Response Time (Full-Scale) | 40 ns | |||
| Supply Voltage | 2.7 V | 5.5 V | ||
| Power Consumption (at 3 V) | 41 mW | |||
| Power-Down Current | 20 µA | |||
| Operating Temperature Range | -40°C | +85°C | ||
| Package Type | 8-lead MSOP |
Key Features
- Wide Bandwidth: Operates from 0.1 GHz to 2.5 GHz.
- High Dynamic Range: Up to 70 dB with ±3.0 dB accuracy.
- High Accuracy: ±1.0 dB over 65 dB range at 1.9 GHz.
- Fast Response Time: 40 ns full-scale typical response time.
- Controller Mode: Includes error output and setpoint interface.
- Stable Over Supply and Temperature: Scaling remains stable across supply and temperature variations.
- Low Power Consumption: 40 mW at 3 V and 20 µA in power-down mode.
- Power-Down Feature: Low current sleep mode initiated by taking the input high.
Applications
- RF Transmitter Power Amplifier Control: Setpoint control and level monitoring.
- Logarithmic Amplifier for RSSI Measurement: Used in cellular base stations, radio links, and radar systems.
Q & A
- What is the frequency range of the AD8313?
The AD8313 operates from 0.1 GHz to 2.5 GHz.
- What is the dynamic range of the AD8313?
The dynamic range is up to 70 dB, with an accuracy of ±3.0 dB.
- How accurate is the AD8313?
The AD8313 has an accuracy of ±1.0 dB over a 65 dB range at 1.9 GHz.
- What is the response time of the AD8313?
The full-scale response time is typically 40 ns.
- What is the supply voltage range for the AD8313?
The supply voltage range is from 2.7 V to 5.5 V.
- How much power does the AD8313 consume?
The power consumption is 41 mW at 3 V and 20 µA in power-down mode.
- What is the operating temperature range of the AD8313?
The operating temperature range is from -40°C to +85°C.
- In what package is the AD8313 available?
The AD8313 is available in an 8-lead MSOP package.
- What are some common applications of the AD8313?
Common applications include RF transmitter power amplifier control, RSSI measurement in cellular base stations, radio links, and radar systems.
- Does the AD8313 have a power-down feature?
Yes, the AD8313 has a power-down feature that reduces current to 20 µA when initiated.
