MAX3325
3V Dual RS-232 Transceiver with
LCD Supply and Contrast Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +3.0V to +3.6V, V
L
= +3.3V, circuit and components of Figure 1, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at V
DD
= +3.3V, T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
, V
L
to GND........................................................-0.3V to +6V
LCD, REF-, TEMP to GND.............................-6V to (V
DD
+ 0.3V)
V+ to GND (Note 1)..................................................-0.3V to +7V
V- to GND (Note 1)...................................................+0.3V to -7V
V+ to |V-| (Note 1) ................................................................+13V
REF+, FB, R_OUT to GND ............................-0.3V to (V
L
+ 0.3V)
Input Voltages
T_OUT, SDLCD, SD232, UP, DOWN to GND.......-0.3V to +6V
R_IN to GND....................................................................±25V
Output Voltages
T_OUT to GND.................................................................±13V
R_OUT to GND..........................................-0.3V to (V
L
+ 0.3V)
REG to GND.........................................................-0.3V to +6V
Short-Circuit Duration (T_OUT, REF+, REF-) .............Continuous
Continuous Output Current
REG.................................................................................75mA
LCD.................................................................................40mA
Continuous Power Dissipation
28-Pin SSOP (derate 9.52mW/°C above +70°C) .........762mW
28-Pin NDIP (derate 14.3mW/°C above +70°C) ........1143mW
Operating Temperature Range
MAX3325C_I.......................................................0°C to +70°C
MAX3325E_I ....................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
Note 1: V+ and V- can have maximum magnitudes of +7V, but their absolute difference cannot exceed 13V.
V
FB
= 0, CMOS input
3V < V
DD
< 3.6V
1 transmitter loaded with
5kΩ, T
A
= +25°C
I
TEMP
< 22µA
T
A
= +25°C
Guaranteed monotonic
No load
No load, V
DD
= V
L
= 3.3V, T
A
= +25°C
No load, V
DD
= V
L
= 3.3V, T
A
= +25°C
CONDITIONS
nA-10 0 10Input Leakage Current (Note 2)
mV-20 0 20Feedback Regulation Point
mA50Short-Circuit Current
mV650Line Regulation
4.7 5 5.3
mV/°C-18
TEMP Voltage Temperature
Coefficient
V-3.2TEMP Output
kΩ35 50 65Output Impedance
mV-15 0 10Zero-Scale Voltage
V1.13 1.2 1.27Full-Scale Voltage
Bits6
µA0.5 10V
L
Supply Current
mA24V
DD
Supply Current
UNITSMIN TYP MAXPARAMETER
SD232, SDLCD = GND; all input pins = GND or V
DD
;
V
DD
= V
L
= 3.3V; T
A
= +25°C
µA0.5 10V
DD
Shutdown Supply Current
V
LCD
= -4.0V, load = 0 to -3mA mV20LCD Load Regulation (Note 3)
V
5
REG Output Voltage
0 < V
DAC
< V
REF
+, I
DAC
≤ 10µA
No load
V
CC
≥ 3.15V, I
REG
= 0 to
11mA
V
CC
≥ 3.0V, I
REG
= 0 to
7mA
DC CHARACTERISTICS
DIGITAL-TO-ANALOG CONVERTER
TEMPERATURE SENSOR
POSITIVE LINEAR REGULATOR
NEGATIVE LINEAR REGULATOR—LCD BIAS
Resolution
