Datasheet

MAX3120
Low-Profile, 3V, 120µA,
IrDA Infrared Transceiver
_______________________________________________________________________________________ 3
0.6
0.8
1.2
1.0
1.4
1.6
-40 10-15 35 60 85
LED DRIVER
ON-RESISTANCE vs. TEMPERATURE
MAX3120 TOC01
TEMPERATURE (°C)
R
LEDC
(Ω)
I
LEDC
= 100mA
V
CC
= 3.3V
V
CC
= 5V
90
100
120
110
130
140
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX3120 TOC02
TEMPERATURE (°C)
SUPPLY CURRENT
(µA)
V
CC
= 3V
V
CC
= 5V
105
115
110
125
120
130
135
3.0 4.03.5 4.5 5.0 5.5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX3120 TOC03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
(µA)
0
200
100
400
300
500
600
100 250 300150 200 350 400
LEDC VOLTAGE
vs. LEDC CURRENT
MAX3120 toc04
LEDC CURRENT (mA)
V
LEDC
(mV)
V
CC
= 3.3V
V
CC
= 5V
PULSED AT
20% DUTY CYCLE
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
Transmitter Rise Time t
r
10% to 90% of 200mA drive current 20 600 ns
Transmitter Fall Time t
f
90% to 10% of 200mA drive current 20 600 ns
Transmitter Output Resistance I
OUT
= 200mA
1.15 2.0
Ω
0.9 1.6
Off-Leakage Current 0.01 10 µA
V
CC
= 5.0V
V
CC
= 3.3V
IR TRANSMITTER
Note 1: All supply current measurements are made under the following conditions: no load at all outputs, input voltages at GND or
V
CC
, no PIN diode input current.
Note 2: Equivalent input current noise is calculated by dividing the output noise of the transimpedance amplifier by the midband
transimpedance gain.
Note 3: Sensitivity is measured with an IrDA-compliant input signal, where the data rate is within the Supported Data Rate, rise/fall
times are less than 600ns, and pulse widths are between 1.41µs and 3/16 of the baud rate.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C and V
CC
= +3.3V.)