TPA8304
Features
- 7 full decades of range: 1n A to 10m A
- Law conformance error: 0.2 d B from 10n A to 10m A
- Fast step response: raising 0.2μs, falling 5μs for 10n A to
10μA input on INPT
- Basic logarithmic intercept at 100 p A
- Logarithmic slope of 200 m V/20d B (at the VLOG pin)
- Optimized for fiber optic photodiode interfacing
- Single-supply operation: 4.5 V to 5.5 V
- Power down mode
Applications
- High accuracy optical power measurement
- Wide range baseband log pression
- Versatile detector for APC loops
- EDFA
Block Diagram
Description
The TPA8304 is a logarithmic detector optimized for the measurement of low frequency signal power in fiber optic systems and offers a large dynamic range. Wide measurement range, accuracy and fast step response are achieved, which is very suitable for the requirement of optic system. The TPA8304 requires only a single positive supply of 5 V. Low quiescent current and chip disable facilitate use in batteryoperated applications.
VPS2
VPDB
VSUM INPT...
