DS1843D+ Maxim Integrated Products, DS1843D+ Datasheet

Sample & Hold Amplifiers IC FAST SAMPLE HOLD CIRCUIT

DS1843D+

Manufacturer Part Number
DS1843D+
Description
Sample & Hold Amplifiers IC FAST SAMPLE HOLD CIRCUIT
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1843D+

Acquisition Time
260 ns to 300 ns
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Package / Case
uDFN-8
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.97 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-4539; Rev 0; 5/09
Pin Configuration appears at end of data sheet.
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.
Gigabit Passive Optical Network (GPON) OLT
Gigabit Ethernet Passive Optical Network (GEPON) OLT
GPON Optical Network Unit
Sample and Hold
STROBE
MAX4007
DS1842/
R
IN
3.3V
V
V
V
SEN
GND
________________________________________________________________ Maxim Integrated Products
CC
INP
INN
C
C
IN
IN
General Description
CONTROL
LOGIC
DS1843
Applications
C
C
S
S
Fast Sample-and-Hold Circuit
V
V
OUTN
OUTP
DEN
3.3V
STROBE
♦ Fast Sample Time < 300ns
♦ Hold Time > 100µs
♦ Low Input Offset
♦ Buffered Output
♦ Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
TRL = Tape and reel.
DS1843D+
DS1843D+TRL
SEN
SDA
SCL
MON1
BMD
MON4
MON3P
MON3N
PART
SENSOR
V
TEMP
CC
INTERFACE
I
2
C
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
CONTROLLER
12-BIT
ADC
SYSTEM STATUS BITS,
A/D CONFIG/RESULTS,
ALARMS/WARNINGS,
LOOKUP TABLES,
MAIN MEMORY
EEPROM/SRAM
USER MEMORY
PIN-PACKAGE
8 μDFN
8 μDFN
Features
MOD
BIAS
DAC
DAC
1

Related parts for DS1843D+

DS1843D+ Summary of contents

Page 1

... Fast Sample Time < 300ns ♦ Hold Time > 100µs ♦ Low Input Offset ♦ Buffered Output ♦ Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package Applications PART DS1843D+ DS1843D+TRL + Denotes a lead(Pb)-free/RoHS-compliant package. TRL = Tape and reel. SDA SCL INTERFACE V CC ...

Page 2

Fast Sample-and-Hold Circuit ABSOLUTE MAXIMUM RATINGS Voltage Range on V .............................................-0.5V to +6V CC Voltage Range OUTP OUTN SEN, DEN ............................-0. INP INN * Subject to not exceeding +6V. ...

Page 3

AC ELECTRICAL CHARACTERISTICS (V = +2.97V to +5.5V -40°C to +85°C, unless otherwise noted.) (See the Timing Diagram .) CC A PARAMETER SYMBOL Sample Time Minimum (Note 3) Delay Time Minimum Output Time Hold Time Output Step Recovery ...

Page 4

Fast Sample-and-Hold Circuit (T = +25°C, unless otherwise noted vs 5.9 5.8 DEN = GND 5.7 5.6 5.5 DEN = V CC 5.4 5.3 2.5 3.0 3.5 4.0 4.5 5.0 V (V) CC OUTPUT HOLD ...

Page 5

A DIFFERENTIAL OUTPUT, TRANSIENT WITH 10% V STEP (V = 1V) CC INP DS1843 toc10 V SEN 2V/div OUTP OUTN 1V/div ...

Page 6

Fast Sample-and-Hold Circuit PIN NAME 1 V Power-Supply Input Positive Voltage Input. Input to sample circuit. INP 3 V Negative Voltage Input. Input to sample circuit. INN 4 DEN Differential Output Enable. Connect GND ...

Page 7

CURRENT MIRROR OUTPUT C PAR Figure 1. Input Impedances for Settling Time Calculations Diagram Applications Information Power-Supply Decoupling To achieve the best results when using the DS1843, decouple the power-supply pin, V 0.1μF capacitor. Use a high-quality X7R or equivalent ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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