AD8304 PDF Datasheet
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Description
This is 160 dB Range (100 pA -10 mA) Logarithmic Converter. a
FEATURES Optimized for Fiber Optic Photodiode Interfacing Eight Full Decades of Range
Law Conformance 0.1 dB from 1 nA to 1 mA Single-Supply Operation (3.0 V 5.5 V) Complete and Temperature Stable Accurate Laser-Trimmed Scaling:
Logarithmic Slope of 10 mV, dB (at VLOG Pin) Basic Logarithmic Intercept at 100 pA Easy Adjustment of Slope and Intercept Output Bandwidth of 10 MHz, 15 V, s Slew Rate 1-, 2-, or 3-Pole Low-Pass Filtering at Output Miniature 14-Lead Package (TSSOP) Low Power: ~4.5 mA Quiescent Current (Enabled)
APPLICATIONS High Accuracy Optical Power Measurement Wide Range Baseband Log Compression Versatile Detector for APC Loops
160 dB Range (100 pA 10 mA) Logarithmic Converter
AD8304
FUNCTIONAL BLOCK DIAGRAM
VPDB 6
VSUM 3 IPD INPT 4
VSUM 5
VPS2 10
PWDN 2
PDB
BIAS ~10k
VPS1 12
AD8304
VREF
7 VREF
0.5V
TEMPERATURE COMPENSATION
5k
8 VLOG 9 BFIN 13 BFNG
1 VNEG
14 ACOM
11 VOUT
PRODUCT DESCRIPTION The AD8304 is a monolithic logarithmic detector optimized fo.