DS1843
Description
The DS1843 is a sample-and-hold circuit useful for capturing fast signals where board space is constrained. It includes a differential, high-speed switched capacitor input sample stage, offset nulling circuitry, and an output buffer. The DS1843 is optimized for use in optical line transmission (OLT) systems for burst-mode RSSI measurement in conjunction with an external sense resistor.
Applications
Gigabit Passive Optical Network (GPON) OLT
Gigabit Ethernet Passive Optical Network (GEPON) OLT
GPON Optical Network Unit
Sample and Hold
Features o Fast Sample Time < 300ns o Hold Time > 100µs o Low Input Offset o Buffered Output o Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1843D+
-40°C to +85°C
8 µDFN
DS1843D+TRL
-40°C to +85°C
8 µDFN
+Denotes a lead(Pb)-free/Ro HS-pliant package. TRL = Tape and reel.
Typical Operating Circuit
DS1842/ MAX4007
3.3V VCC VINP
CIN RIN
CIN VINN
CS CS
STROBE
SEN...
