Low-Profile, 3V, 120碌A(chǔ),
IrDA Infrared Transceiver
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擄C and V
CC
= +3.3V.)
PARAMETER
IR TRANSMITTER
Transmitter Rise Time
Transmitter Fall Time
Transmitter Output Resistance
Off-Leakage Current
SYMBOL
t
r
t
f
CONDITIONS
10% to 90% of 200mA drive current
90% to 10% of 200mA drive current
V
CC
= 3.3V
I
OUT
= 200mA
V
CC
= 5.0V
MIN
TYP
20
20
1.15
0.9
0.01
MAX
600
600
2.0
1.6
10
UNITS
ns
ns
鈩?/div>
碌A(chǔ)
MAX3120
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 1.41碌s and 3/16 of the baud rate.
Typical Operating Characteristics
(T
A
= +25擄C, unless otherwise noted.)
LED DRIVER
ON-RESISTANCE vs. TEMPERATURE
MAX3120 TOC01
SUPPLY CURRENT
vs. TEMPERATURE
MAX3120 TOC02
1.6
I
LEDC
= 100mA
1.4
V
CC
= 3.3V
140
130
SUPPLY CURRENT (碌A(chǔ))
V
CC
= 5V
120
R
LEDC
(鈩?
1.2
1.0
V
CC
= 5V
110
V
CC
= 3V
0.8
100
0.6
-40
-15
10
35
60
85
TEMPERATURE (擄C)
90
-40
-15
10
35
60
85
TEMPERATURE (擄C)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX3120 TOC03
LEDC VOLTAGE
vs. LEDC CURRENT
PULSED AT
20% DUTY CYCLE
MAX3120 toc04
135
130
SUPPLY CURRENT (碌A(chǔ))
125
600
500
400
V
LEDC
(mV)
V
CC
= 3.3V
300
200
V
CC
= 5V
100
0
120
115
110
105
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
100
150
200
250
300
350
400
LEDC CURRENT (mA)
_______________________________________________________________________________________
3
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