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LTC2803CDHC#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
7
2801234fe
LTC2801/LTC2802/
LTC2803/LTC2804
tyPical PerForMance characteriSticS
Receiver Input Threshold
vs Temperature
Receiver Output Voltage
vs Load Current Receiver Output Duty Cycle
Driver Slew Rate
vs Load Capacitance
Driver Short-Circuit Current
vs Temperature
Shutdown or Drivers Disabled Mode
Driver Leakage vs Temperature
Logic Input Threshold
vs V
L
Supply Voltage
LTC2804 Driver Outputs Exiting
Shutdown
LTC2804 Driver Outputs
Enable/Disable
T
A
= 25°C, V
CC
= V
L
= 3.3V unless otherwise noted.
TEMPERATURE (°C)
–50
THRESHOLD VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
25 75
2801 GO7
–25 0
50 100 125
INPUT HIGH
INPUT LOW
V
L
= 5.5V
V
L
= 3.3V
V
L
= 1.8V
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
2801 GO8
6
5
4
3
2
1
0
0 2 4 51 3 6 7 8
V
L
= 5.5V
V
L
= 3.3V
V
L
= 1.8V
V
L
= 5.5V
V
L
= 3.3V
V
L
= 1.8V
RECEIVERS
ALIVE MODE
NORMAL
MODE
R
IN
= ±3V
C
L
= 150pF
10
POSITIVE DUTY CYCLE (%)
100
80
60
40
20
0
100 1000 10000
2801 GO9
DATA RATE (kbps)
LOAD CAPACITANCE (nF)
0
SLEW RATE (V/µs)
3
5
2801 G10
1 2 4
80
70
60
50
40
30
20
10
0
FALLING (LTC2802/04)
RISING (LTC2802/04)
FALLING (LTC2801/03)
RISING (LTC2801/03)
TEMPERATURE (°C)
–50
SHORT-CIRCUIT CURRENT (mA)
60
50
40
30
20
10
0
25 75
2801 G11
–25 0
50 100 125
SINKING
SOURCING
REGULATOR CAN
LIMIT FURTHER
V
L
SUPPLY VOLTAGE (V)
1
THRESHOLD VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
2 3 4 5
2801 G13
6
INPUT HIGH
INPUT LOW
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
LEAKAGE CURRENT (A)
10
–6
10
–7
10
–8
10
–9
10
–10
10
–11
2801 G12
V(TOUT) = 15V OR
V(TOUT) = –15V
TEMPERATURE (°C)
–50 25 75
–25 0
50 100 125
2V/DIV
5V/DIV
T2OUT
T1OUT
MODE AND PS
V
CC
= 3.3V
V
L
= 1.8V
LOAD = 3k + 2.5nF
100µs/DIV
2801 G14
2V/DIV
5V/DIV
T2OUT
T1OUT
MODE
V
CC
= 3.3V
V
L
= 1.8V
LOAD = 3k + 250pF
2µs/DIV
2801 G15
LTC2801/LTC2802/
LTC2803/LTC2804
8
2801234fe
Pin FunctionS
Mode control
PIN NAME
PIN NUMBER
COMMENTS
2801
2802
2803
2804
2803-1
2804-1
V
CC
3 5 5 Input Supply (1.8V-5.5V). Bypass to GND with a 1µF capacitor.
V
DD
4 6 6 Generated Positive Supply Voltage for RS-232 Driver (7V). Connect a 1µF capacitor between
V
DD
and GND.
V
EE
13* 17* 9 Generated Negative Supply Voltage for RS-232 Driver (–6.3V). Connect a 1µF capacitor
between V
EE
and GND.
SW 5 7 7 Switch Pin. Connect a 10µH inductor between SW and V
CC
.
GND 6 8 8 Ground.
CAP 7 9 10 Charge Pump Capacitor for Generated Negative Supply Voltage. Connect a 220nF capacitor
between CAP and SW.
V
L
10 12 12 Logic Supply (1.8V-5.5V) for the receiver outputs, driver inputs, and control inputs. This pin
should be bypassed to GND with a 220nF capacitor if it’s not tied to V
CC
.
TIN (T1IN, T2IN) 11 14, 13 14, 13 Driver Input(s), referenced to V
L
.
TOUT (T1OUT, T2OUT) 2 3, 4 3, 4 RS-232 Driver Output(s).
RIN (R1IN, R2IN) 1 1, 2 1, 2 RS-232 Receiver Input(s). Includes internal 5kΩ termination resistor(s).
ROUT (R1OUT, R2OUT) 12 16, 15 16, 15 Receiver Output(s), referenced to V
L
. Output is short-circuit protected to GND/V
CC
/V
L
, and is
high impedance in Shutdown mode, allowing data line sharing.
PS 8 10 — Power Supply control pin, referenced to V
L
. Enables the integrated DC-DC converter.
MODE 9 11 — Mode control pin, referenced to V
L
. See Table 1 for functionality.
ON/OFF — — 11 Transceiver enable pin, referenced to V
L
. A logic low puts the device in Shutdown mode and
places both driver and receiver outputs in a high impedance state.
*Backside thermal pad
Table 1. LTC2801, LTC2802, LTC2803, LTC2804
MODE NAME PS MODE
RECEIVER
OUTPUT(S) DC-DC
DRIVER
OUTPUT(S) I
VCC
* I
VL
*
SHUTDOWN L L HI-Z OFF HI-Z 1µA 1µA
RECEIVER(S) ACTIVE L H ON OFF HI-Z 1µA 15µA
DRIVER(S) DISABLED H L ON ON HI-Z 2.1mA 80µA OR
150µA
NORMAL H H ON ON ON 2.3mA 80µA OR
150µA
Table 2. LTC2803-1, LTC2804-1
MODE NAME ON/OFF
RECEIVER
OUTPUTS DC-DC
DRIVER
OUTPUTS I
VCC
* I
VL
*
SHUTDOWN L HI-Z OFF HI-Z 1µA 1µA
NORMAL H ON ON ON 2.3mA 150µA
*Typical currents for static drivers. Normal mode currents are for unloaded outputs.
9
2801234fe
LTC2801/LTC2802/
LTC2803/LTC2804
block diaGraM
5k
5k
GND
GND
V
L
V
DD
V
L
V
L
V
EE
GND
CONTROL
BOOST
REGULATOR
V
EE
T2OUT
T1OUT
R2IN
R1IN
V
DD
C3
1µF
C2
1µF
**
**
** LTC2803
LTC2804
LTC2803-1
LTC2804-1
LTC2801
LTC2802
LTC2803
LTC2804
LTC2803-1
LTC2804-1
**
**
CAPSW
C1
220nF
L1
10µH
V
CC
C4
1µF
C5
220nF
T2IN
T1IN
R2OUT
R1OUT
PS
MODE
ON/OFF
V
L
1.8V TO 5.5V
1.8V TO 5.5V
2801 BD
FEATURE 2801 2802 2803 2803-1 2804 2804-1
DRIVERS and RECEIVERS 1 + 1 1 + 1 2 + 2 2 + 2 2 + 2 2 + 2
PACKAGE DFN-12 DFN-12 DFN-16 SSOP-16 DFN-16 SSOP-16
1.8V - 5.5V OPERATION
l l l l l l
1.8V - 5.5V LOGIC SUPPLY (V
L
)
l l l l l l
SHUTDOWN (1µA)
l l l l l l
RECEIVER(S) ACTIVE (15µA)
l l l l
DRIVER(S) DISABLE
l l l l
100kb/s for R
L
= 3kΩ, C
L
= 2.5nF
l l l l l l
250kb/s for R
L
= 3kΩ, C
L
= 1nF
l l l l l l
1Mb/s for R
L
= 3kΩ, C
L
= 250pF
l l l
Feature SuMMary
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

LTC2803CDHC#TRPBF

Mfr. #:
Buy LTC2803CDHC#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC 1.8V-5V 2D+2R 250kbps RS232 Transceiver w/ Driver Disable
Lifecycle:
New from this manufacturer.
Delivery:
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