Overview
The ADL5304ACPZ-R7 from Analog Devices Inc. is a high-speed logarithmic converter designed for applications requiring fast response and low noise over a wide measurement range. This device is optimized for very fast response at all input currents, making it suitable for various high-accuracy measurements. It operates with a single or dual supply and supports a broad input current range of 1 pA to 10 mA, covering 10 decades of input range.
Key Specifications
| Specification | Value |
|---|---|
| Input Current Range | 1 pA to 10 mA |
| Logarithmic Slope | Nominal 10 mV/dB (200 mV/decade), programmable |
| Law Conformance | ±0.25 dB from 100 pA to 100 μA |
| Supply Voltage | Single: 5 V, Dual: ±2.5 V to ±5 V |
| Operating Temperature | −40°C to +85°C |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.85mm) |
| Bandwidth | >4 MHz for inputs >1 μA, 25 kHz at 1 nA, 350 kHz at 10 nA |
Key Features
- Optimized for very fast response at all input currents
- 10 decades of input range: 1 pA to 10 mA
- Log ratio or fixed-intercept operation
- Programmable log slope and intercept
- Adaptive photodiode (PD) bias for low dark current
- Precision voltage references (1.5 V and 2.0 V) and reference current (100 nA)
- Single- or dual-supply operation
- Full two-argument logarithmic computation
- Guard voltage to minimize leakage currents
Applications
- High accuracy optical power measurement
- Wide range baseband log compression
- Versatile detector for high speed Automatic Power Control (APC) loops
Q & A
- What is the input current range of the ADL5304ACPZ-R7?
The input current range is from 1 pA to 10 mA. - What is the logarithmic slope of the ADL5304ACPZ-R7?
The nominal logarithmic slope is 10 mV/dB (200 mV/decade), and it is programmable. - What is the law conformance of the ADL5304ACPZ-R7?
The law conformance is ±0.25 dB from 100 pA to 100 μA. - What are the supply voltage options for the ADL5304ACPZ-R7?
The device can operate with a single 5 V supply or dual supplies ranging from ±2.5 V to ±5 V. - What is the operating temperature range of the ADL5304ACPZ-R7?
The operating temperature range is from −40°C to +85°C. - What package type is the ADL5304ACPZ-R7 available in?
The device is packaged in a 32-Lead LFCSP (5mm x 5mm x 0.85mm). - What are the typical applications of the ADL5304ACPZ-R7?
Typical applications include high accuracy optical power measurement, wide range baseband log compression, and versatile detection for high speed APC loops. - Does the ADL5304ACPZ-R7 support adaptive photodiode biasing?
Yes, it supports adaptive photodiode (PD) bias for low dark current. - Can the log slope and intercept be programmed on the ADL5304ACPZ-R7?
Yes, the log slope and intercept are programmable using on-chip resistors and external resistors. - What is the bandwidth of the ADL5304ACPZ-R7 at different input currents?
The bandwidth is >4 MHz for inputs >1 μA, 25 kHz at 1 nA, and 350 kHz at 10 nA.
