Rainbow Electronics DS1843 - Manual

General Description
The DS1843 is a sample-and-hold circuit useful for cap-
turing fast signals where board space is constrained. It
includes a differential, high-speed switched capacitor
input sample stage, offset nulling circuitry, and an out-
put 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
♦ Fast Sample Time < 300ns
♦ Hold Time > 100µs
♦ Low Input Offset
♦ Buffered Output
♦ Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package
DS1843
Fast Sample-and-Hold Circuit
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
V OUTN
MAIN MEMORY
EEPROM/SRAM
A/D CONFIG/RESULTS,
SYSTEM STATUS BITS,
ALARMS/WARNINGS,
LOOKUP TABLES,
USER MEMORY
CONTROLLER
V INP
V CC
V INN
SEN
GND
V OUTP
V
CC
DEN
SDA
SCL
MON1
BIAS
DAC
12-BIT
ADC
MOD
DAC
BMD
SEN
STROBE
STROBE
MON4
MON3P
MON3N
ANALOG MUX
3.3V
3.3V
TEMP
SENSOR
I 2 C
INTERFACE
DS1843
DS1842/
MAX4007
R IN
C S
C
S
C IN
C
IN
CONTROL
LOGIC
Typical Operating Circuit
19-4539; Rev 0; 5/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
TRL = Tape and reel.
PART TEMP RANGE PIN-PACKAGE
DS1843D+ -40°C to +85°C 8 μDFN
DS1843D+TRL -40°C to +85°C 8 μDFN
Pin Configuration appears at end of data sheet.