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 Ethernet Passive Optical Network (GEPON) OLT * Gigabit Passive Optical Network (GPON) OLT * GPON Optical Network Unit * Sample and Hold * Fast Sample Time < 300ns * Hold Time > 100µs * Low Input Offset * Buffered Output * Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package