Datasheet

MAX3130/MAX3131
3V to 5.5V, IrDA Infrared Transceiver with
Integrated RS-232 Interface
_______________________________________________________________________________________ 5
1.0
2.0
1.5
3.0
2.5
3.5
4.0
04020 60 80 100
RXD OUTPUT PULSE WIDTH vs. DISTANCE
(115.2 kbps)
MAX3130 toc07
DISTANCE (cm)
RXD PULSE WIDTH (µs)
TRANSMITTER POWER = 200mW/sr
INPUT PULSE WIDTH = 1.63µs
TEMIC BPV22NF
V
CC
= 3.3V
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
0
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3130 toc08
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
2000 30001000 4000 5000
V
OUT
+
1 TRANSMITTER AT 235kbps
1 TRANSMITTER AT 15kbps
V
OUT
-
0
4
2
8
6
10
12
16
14
18
0 1000 2000 3000 4000 5000
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
MAX3130 toc09
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
-SLEW
+SLEW
0
5
10
15
20
25
30
35
40
0
SUPPLY CURRENT vs. LOAD CAPACITANCE
(RS-232 TRANSMITTING)
MAX3130-toc10
LOAD CAPACITANCE (pF)
I
CC
(mA)
2000 30001000 4000 5000
235kbps
1 TRANSMITTER DRIVEN ONLY
120kbps
20kbps
2V/div
2V/div
RXD OUTPUT
vs. INFRARED INPUT
MAX3130 toc11
2µs/div
RXD
OUTPUT
INFRARED
INPUT
V
CC
= 3.3V, 115.2kbps AT 1cm DISTANCE
TEMIC BPV22NF
TRANSMIT POWER 200mW/sr
2V/div
2V/div
RXD OUTPUT
vs. INFRARED INPUT
MAX3130 toc12
100µs/div
RXD
OUTPUT
INFRARED
INPUT
V
CC
= 3.3V, 2400bps AT 1cm DISTANCE
TEMIC BPV22NF
TRANSMIT POWER 200mW/sr
Typical Operating Characteristics (continued)
(V
CC
= AV
CC
= 3.3V, GND = AGND = PGND, C1–C4 = 0.1µF, R
L
= 3kΩ, T
A
= +25°C, unless otherwise noted.)