Linear LTC2803 Quick Start Manual

DESCRIPTION
Demons t r a t i on c i r cu i t 827 is a 1 .8V to 5 .5V RS-232
Dua l T r ansce i ve r f ea tu r i ng t he LTC2803 and LTC2804 .
VERSION P/N
DC827A-A LTC2803CDHC
DC827A-B LTC2804CDHC
Design files for this circuit board are available. Call
the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT and
PowerPath are trademarks of Linear Technology Corporation.
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V Input Supply Voltage
CC
V Logic Supply Voltage
L
SR(D) Driver Slew Rate
Maximum Data Rate
--
JUMPERS
SCH NAME PURPOSE
JP1,
MODE, Mode control, as follows:
JP2
PS
JP3 LOGIC Selects supply for VL pin. Use setting "VL" for a
separate logic supply, or "VCC" to share a single
SUPPLY
supply.
JP4, TD/RD, Selects Receiver loopback mode, for use with the
DB9 connector. In this configuration, R1OUT is con-
JP5
RTS/CTS
nected to T1IN and R2OUT is connected to T2IN.
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PS MODE MODE NAME
OFF L Shutdown
OFF H Receivers Active
ON L Drivers Disabled
ON H Normal
1.8V to 5.5V RS-232 Dual Transceiver
CONDITIONS
R =3kΩ, 50pF<C <2.5nF
L L
LTC2803:
LTC2804:
R = 3kΩ, C = 2.5nF
L L
R = 3kΩ, C = 1.0nF
L L
R = 3kΩ, C = 250pF (LTC2804)
L L
SCH NAME
DEMO CIRCUIT 827
LTC4260CGN
QUICK START GUIDE
LTC2803 and LTC2804
MIN TYP
1.8
1.8
4
4
100
250
1000
PURPOSE
For the UART connected to the DB9, this wraps TD
back to RD and RTS back to CTS.
MAX UNITS
5.5 V
5.5 V
30 V/µs
150 V/µs
kbps
kbps
kbps
1