 English |
|
|
|
|
|
|
|
| LTC2801_15 Datasheet, PDF (6/18 Pages) Linear Technology – 1.8V to 5.5V RS-232 Single and Dual Transceivers | |||
| |||
| ◁ |
LTC2801/LTC2802/
LTC2803/LTC2804
Test Circuits
GND
VL
â3V OR 3V
PS AND MODE
RL
ROUT
CL
PS AND MODE 1/2 VL
ROUT
ROUT
tPZHR
tPZLR
1/2 VL
1/2 VL
PS AND MODE tr, tf ⤠40ns
Figure 5. Receiver Enable/Disable Times
1/2 VL
VL
tPHZR
tPLZR
0V
VOHR â 0.5V VOHR
0V
VL
VOLR
+
0.5V
VOLR
2801 F05
Typical Performance Characteristics TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
LTC2803 at 1.8V and 250kbps
2V/DIV
10V/DIV
T1IN
T1OUT
T2OUT
2V/DIV
R1OUT
R2OUT
LTC2804 at 1.8V and 1Mbps
2V/DIV
10V/DIV
T1IN
T1OUT
T2OUT
2V/DIV
R1OUT
R2OUT
VCC = VL = 1.8V 2µs/DIV
WRAPPING DATA
TOUT LOAD = 1nF + RIN
ROUT LOAD = 150pF
2801 G01
Supply Current vs Supply Voltage
(Dual Transceiver)
60
ALL DRIVERS SWITCHING
VCC = VL
50
RL = 3k
250kbps
CL = 1nF
40
125kbps
30
20
20.8kbps
10
0
1
LTC2804
LTC2803
2
3
4
5
SUPPLY VOLTAGE (V)
6
2801 G04
VCC = VL = 1.8V 400ns/DIV
WRAPPING DATA
TOUT LOAD = 250pF + RIN
ROUT LOAD = 150pF
2801 G02
Supply Current vs Data Rate
100 ALL DRIVERS SWITCHING
VCC = VL = 1.8V
80 RL = 3k
1nF
1nF
60
250pF
40
250pF
20
LTC2804
LTC2802
0
0
200 400 600 800 1000
DATA RATE (kbps)
2801 G05
Drivers Disabled Mode Supply
Current vs Supply Voltage
3.0
TA = 85°C
VCC = VL
2.5
TA = 25°C
2.0
TA = â40°C
1.5
1.0
0.5
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
2801 G03
Supply Current vs Load
Capacitance (Dual Transceiver)
100
250kbps
80
125kbps
60
40
20.8kbps
20
VCC = VL = 1.8V
LTC2804
RL = 3k
LTC2803 ALL DRIVERS SWITCHING
0
1
2
3
4
5
LOAD CAPACITANCE (nF)
2801 G06
2801234fe
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese