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PDF DS1843 Data sheet ( Hoja de datos )
| Número de pieza | DS1843 | |
| Descripción | RSSI Burst-Mode Sample-and-Hold Circuit | |
| Fabricantes | Maxim Integrated Products | |
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19-4539; Rev 0; 5/09
www.DataSheet4U.com
Fast Sample-and-Hold Circuit
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
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/RoHS-compliant package.
TRL = Tape and reel.
Typical Operating Circuit
DS1842/
MAX4007
3.3V
VCC
VINP
CIN
RIN
CIN
VINN
DS1843
CS
CS
STROBE
S_EN
GND
CONTROL
LOGIC
SDA
I2C
SCL INTERFACE
VCC
VOUTP
VOUTN
MON1
BMD
MON3P
MON3N
MON4
TEMP
3.3V SENSOR
D_EN STROBE S_EN
MAIN MEMORY
EEPROM/SRAM
A/D CONFIG/RESULTS,
SYSTEM STATUS BITS,
ALARMS/WARNINGS,
LOOKUP TABLES,
USER MEMORY
12-BIT
ADC
MOD
DAC
BIAS
DAC
CONTROLLER
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
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(TA = +25°C, unless otherwise noted.)
Fast Sample-and-Hold Circuit
Typical Operating Characteristics (continued)
2V/div
VCC = 3.3V
VCC = 3.0V
1V/div
DIFFERENTIAL OUTPUT, TRANSIENT
WITH 10% VCC STEP (VINP = 1V)
DS1843 toc10
VS_EN
VOUTP
VOUTN
VOUTP - VOUTN
200mV/div
SINGLE-ENDED OUTPUT, TRANSIENT
WITH 10% VCC STEP (VINP = 1V)
DS1843 toc11
VS_EN
2V/div
VCC = 3.3V
VCC = 3V
1V/div
VOUTP
DIFFERENTIAL OUTPUT STEP RECOVERY,
1V OUTPUT STEP (VINP = 6mV)
DS1843 toc12
200mV/div
VOUTP (200mV/div)
VOUTN (200mV/div)
VS_EN (1V/div)
VOUTP - VOUTN
10mV/div
100μs/div
100μs/div
50μs/div
SINGLE-ENDED STEP RECOVERY,
1V OUTPUT STEP (VINP = 1V)
DS1843 toc13
SINGLE-ENDED OUTPUT, STEP RECOVERY,
1V OUTPUT STEP (VINP = 1V, ZOOMED IN)
DS1843 toc14
DIFFERENTIAL OUTPUT STEP RECOVERY,
1V OUTPUT STEP (VINP = 1V)
DS1843 toc15
VOUTP (200mV/div)
VS_EN (1V/div)
VOUTP STEP (200mV/div)
500mV/div
500mV/div
VOUTP
200mV/div
VOUTP (200mV/div)
VS_EN (1V/div)
OUTPUT STEP (200mV/div)
VOUTN (200mV/div)
VOUTP - VOUTN
50μs/div
50ns/div
DIFFERENTIAL OUTPUT STEP RECOVERY,
1V OUTPUT STEP (VINP = 1V, ZOOMED IN)
DS1843 toc16
50μs/div
200mV/div
VOUTP
VOUTN (200mV/div)
VOUTP - VOUTN
(200mV/div)
50ns/div
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet DS1843.PDF ] | |
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