Overview
The AD8307ARZ-RL7, produced by Analog Devices Inc., is a monolithic demodulating logarithmic amplifier designed for high-frequency applications. It is the first logarithmic amplifier available in an 8-lead SOIC_N package, making it highly compact and versatile. This device operates using the progressive compression (successive detection) technique, providing a dynamic range of 92 dB to ±3 dB law conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz. The AD8307 is known for its stability, ease of use, and minimal requirement for external components. It supports a single-supply voltage of 2.7 V to 5.5 V and operates over an industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Range (±3 dB Error) | From noise floor to maximum input | - | - | 92 | dB |
| Input Range (±1 dB Error) | From noise floor to maximum input | - | - | 88 | dB |
| Logarithmic Conformance | f ≤ 100 MHz, central 80 dB | ±0.3 | ±1 | - | dB |
| Logarithmic Slope | Unadjusted | 23 | 25 | 27 | mV/dB |
| Supply Voltage | - | 2.7 | - | 5.5 | V |
| Supply Current | VENB ≥ 2 V | 7.5 | - | 10 | mA |
| Standby Current | VENB ≤ 1 V | 150 | - | 750 | μA |
| Ambient Temperature Range | Industrial, AD8307AN, AD8307AR | -40 | - | +85 | °C |
Key Features
- Complete 500 MHz monolithic demodulating logarithmic amplifier.
- Dynamic range of 92 dB to ±3 dB law conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz.
- Single-supply voltage of 2.7 V to 5.5 V at 7.5 mA.
- CMOS-compatible control pin for disabling the device to a standby current of 150 μA.
- Industrial temperature range of −40°C to +85°C.
- Available in 8-lead SOIC and PDIP packages.
- Fully differential dc-coupled signal path.
- Highly stable scaling over temperature.
- 100 ns power-up time.
Applications
- Conversion of signal level to decibel form.
- Transmitter antenna power measurement.
- Receiver signal strength indication (RSSI).
- Low cost radar and sonar signal processing.
- Network and spectrum analyzers (up to 120 dB).
- Signal level determination down to 20 Hz.
- True decibel ac mode for multimeters.
Q & A
- What is the dynamic range of the AD8307?
The AD8307 has a dynamic range of 92 dB to ±3 dB law conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz.
- What is the supply voltage range for the AD8307?
The supply voltage range is 2.7 V to 5.5 V.
- What is the standby current of the AD8307 when disabled?
The standby current is 150 μA when the device is disabled.
- What are the common applications of the AD8307?
Common applications include transmitter antenna power measurement, receiver signal strength indication (RSSI), low-cost radar and sonar signal processing, and network and spectrum analyzers.
- What is the operating temperature range of the AD8307?
The operating temperature range is −40°C to +85°C.
- What package types are available for the AD8307?
The AD8307 is available in 8-lead SOIC and PDIP packages.
- How does the AD8307 handle logarithmic conformance?
The AD8307 provides logarithmic conformance of ±0.3 dB to ±1 dB at frequencies up to 100 MHz.
- What is the power-up time of the AD8307?
The power-up time is 100 ns.
- Can the AD8307 be used in multimeter applications?
Yes, it can be used in true decibel ac mode for multimeters.
- How stable is the AD8307 over temperature?
The AD8307 is highly stable over temperature, with a logarithmic slope that remains consistent.
