LINER LT1032 Quad low power line driver Datasheet

LT1032
Quad Low Power
Line Driver
U
FEATURES
■
■
■
■
■
■
■
■
DESCRIPTIO
Low Operating Voltage: ±5V to ±15V
500µA Supply Current
Zero Supply Current when Shut Down
Outputs Can Be Driven ±30V
Thermal Limiting
Output “Open” when Off (Three-State)
10mA Output Drive
Pinout Similar to 1488
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APPLICATIO S
■
■
■
■
RS232
Power Supply Inverter
Micropower Interface
Level Translator
The LT®1032 is a RS232 and RS423 line driver that
operates over a ±5V to ±15V range on low supply current
and can be shut down to zero supply current. Outputs are
fully protected from externally applied voltages of ±30V by
both current and thermal limiting. Since the output swings
to within 200mV of the positive supply and 600mV of the
negative supply, power supply needs are minimized.
Also included is a strobe pin to force all outputs low
independent of input or shutdown conditions. Further,
slew rate can be adjusted with a resistor connected to the
supply.
A major advantage of the LT1032 is the high impedance
output state when off or powered down.
For applications requiring dual or triple RS232 driver/
receiver devices, see the LT1180A (dual), LT1039A (triple)
or the LT1130A data sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Output Swing vs Output Current
–6V
1
LT1032
14
2
13
3
OUTPUT
ON/OFF 4
(0V TO 5V)†
5
INPUT
6
OUTPUT
7
GND
12
INPUT
6V
STROBE*
INPUT
11
OUTPUT
10 RESPONSE TIME
CONTROL*
9
INPUT
8
OUTPUT
*NO CONNECTION NEEDED WHEN NOT USED
†
5V = ON
LT1032 • TA01
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
RS232 Line Driver
V+
0.2
VOUT HIGH
0.4
VOUT LOW
1.0
0.8
0.6
0.4
0.2
V–
0
2
6
8
4
OUTPUT CURRENT (mA)
10
LT1032 • TA02
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LT1032
W W
W
AXI U
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ABSOLUTE
RATI GS (Note 1)
Supply Voltage ..................................................... ±15V
Logic Input Pins ............................................ V – to 25V
ON/OFF Pin ................................................. GND to 15V
Output (Forced) ............................. V – + 30V, V + – 30V
Response Pin ......................................................... ±6V
Short-Circuit Duration (to ±30V) .................... Indefinite
Storage Temperature Range ................ – 65°C to 150°C
Operating Temperature Range
LT1032C ............................................... 0°C to 70°C
LT1032I ........................................... – 40°C to 85°C
LT1032M ....................................... – 55°C to 125°C
C Grade Guaranteed
Functional by Design .............................. – 25°C to 85°C
Lead Temperature (Soldering, 10 sec)................. 300°C
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W
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
VEE
(–15V TO –5V)
ON/OFF
(0V TO 5V)
1
14
2
13 STROBE
3
12
4
11
ORDER PART
NUMBER
ORDER PART
NUMBER
(5V TO 15V)
6
RESPONSE
10 CONTROL
9
7
8
5
GND
VCC
TOP VIEW
LT1032CN
LT1032IN
2
15 STROBE
3
14
ON/OFF 4
13
12 RESPONSE
CONTROL
11
5
6
N PACKAGE
14-LEAD PDIP
TJMAX = 150°C, θJA = 130°C/W CN)
J PACKAGE
14-LEAD CERDIP
TJMAX = 150°C, θJA = 95°C/W (CJ)
TJMAX = 150°C, θJA = 95°C/W (MJ)
LT1032CJ
LT1032MJ
LT1032CSW
LT1032ISW
16 VCC
VEE 1
GND 7
10
NC 8
9
NC
SW PACKAGE
16-LEAD PLASTIC SO (WIDE)
TJMAX = 150°C, θJA = 90°C/W
OBSOLETE PACKAGE
Consider the N Package as an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. Supply voltage = ±5V to ±15V
PARAMETER
CONDITIONS
Supply Current
Power Supply Leakage Current
VON/OFF ≥ 2.4V, IOUT = 0, All Outputs Low
VON/OFF ≤ 0.4V
VON/OFF ≤ 0.1V, TA = 125°C
Load = 2mA Positive
Negative
VSUPPLY = ±5V to ±15V
VSUPPLY = 0V, VOUT = ±30V
VSUPPLY = ±15V, VOUT = ±20V
Operating or Shutdown
Operating of Shutdown
Low Input (VOUT = High)
High Input (VOUT = Low)
VIN > 2.0V
VIN < 0.8V
0 ≤ VIN ≤ 5V
IRESPONSE = 0, RL = 3k
Output Voltage Swing
Output Current (Active)
Output Current (Shutdown)
Output Overload Voltage (Forced)
Input Overload Voltage (Forced)
Logic Input Levels
Logic Input Current
ON/OFF Pin Current
Slew Rate
MIN
●
●
V + – 0.3V
10
●
V + – 30V
V–
●
●
2
●
●
–10
4
TYP
MAX
UNITS
500
1
10
V + – 0.1V
V – + 0.7V
22
2
2
1000
10
50
µA
µA
µA
V
V
mA
µA
µA
V
V
V
V
µA
µA
µA
V/µs
1.4
1.4
2
10
3
15
V – + 0.9V
100
100
V – + 30V
30V
0.8
20
20
50
30
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LT1032
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. Supply voltage = ±5V to ±15V
PARAMETER
CONDITIONS
Change in Slew Rate (Note 3)
IRESPONSE = 50µA
IRESPONSE = – 50µA
VSUPPLY = ±6V, VON/OFF ≤ 0.4V
VRESPONSE = ±6V
Response Pin Leakage
MIN
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: 3V applied to the strobe pin will force all outputs low. Strobe pin
input impedance is about 2k to ground. Leave open when not used.
TYP
MAX
UNITS
50
– 50
1
%
%
µA
Note 3: Response can be changed by connecting a resistor to the supply.
For supplies less than ±6V this current is disconnected when shut down.
Leave open when not used.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
On Supply Current
vs Temperature
Supply Current
vs Supply Voltage
1000
2.0
3.0
1.8
2.5
VS = ±12V
ALL OUTPUTS HIGH
ALL OUTPUTS HIGH
2.0
1.5
1.0
1.4
1.2
1.0
0.8
0.6
100
10
ALL OUTPUTS LOW
0.4
ALL OUTPUTS LOW
0.5
SUPPLY CURRENT (nA)
1.6
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
Off Supply Current
vs Temperature
0.2
0
–50 –25
50
25
75
0
TEMPERATURE (˚C)
100
1
0
125
5
12.5
10
7.5
SUPPLY VOLTAGE (±V)
LT1032 • TPC01
LT1032 • TPC03
RESPONSE PIN LEAKAGE (µA)
1000
10µA
OUTPUT CURRENT
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
VOUT HIGH
0.4
0.8
0.6
1µA
VOUT = –30V
100nA
VOUT = 30V
10nA
0.4
125
Response Pin Leakage
vs Temperature (Device Off)
100µA
VOUT LOW
100
75
TEMPERATURE (°C)
Output Leakage vs Temperature
V+
1.0
50
LT1032 • TPC02
Output Swing vs Output Current
0.2
25
15
100
V = 5V
10
V = –5V
0.2
V–
1
1nA
0
2
6
8
4
OUTPUT CURRENT (mA)
10
LT1032 • TA02
25
50
75
100
TEMPERATURE (°C)
125
25
50
75
100
TEMPERATURE (°C)
LT1032 • TPC05
LT1032 • G06
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LT1032
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TYPICAL PERFOR A CE CHARACTERISTICS
Shutdown Pin Voltage
vs Temperature
ON/OFF Pin Current vs Voltage
4
2
0
–2
70
1.6
MIN ON VOLTAGE
OUTPUT CURRENT (mA)
ON/OFF PIN VOLTAGE (V)
6
CURRENT (µA)
80
1.8
8
1.4
1.2
1.0
0.8
MAX OFF VOLTAGE
0.6
0.4
–4
–6
Current Limit vs Temperature
2.0
10
1
3
2
INPUT VOLTAGE (V)
4
0
–50 –25
5
SINKING
40
30
SOURCING
20
0
0
– 55 – 25
25 50 75 100 125 150
TEMPERATURE (°C)
0
25 50 75 100 125 150
TEMPERATURE (°C)
LT1032 • TPC08
LT1032 • TPC07
Output Swing vs Temperature
LT1032 • TPC09
Slew Rate vs Temperature
V+
20
200
IOUT = 2mA
18
400
IOUT = 10mA
16
SLEW RATE (V/µs)
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
50
10
0.2
0
60
IOUT = –10mA
1
800
IOUT = –2mA
600
14
12
10
8
6
400
4
200
2
V–
–50 –25
0
RISING
FALLING
VS = ±12V
RL = 3k
CL = 51pF
VSLEW = ±8V
0
–50 –25
25 50 75 100 125 150
TEMPERATURE (°C)
50
25
0
75
TEMPERATURE (°C)
ON/OFF Response Time
ON/OFF Response Time
VOUT
2V
0
0
– 2V
VOUT
– 4V
– 6V
5V
ON/OFF
INPUT
0
VIN = 0V
RL = 3k
VS = ±6V
OUTPUT
CL = 51pF
HIGH
VIN = 5V
OUTPUT
LOW
INPUT
0
200µs
400µs
600µs
125
LT1032 • TPC11
LT1032 • TPC10
6V
4V
100
1ms
LT1032 • TPC12
5V/DIV
10V
VOUT
VIN = 0V
5V
0
VOUT
0
– 5V
– 10V
ON/OFF
INPUT
5V
0
RL = 3k
VS = ±12V
CL = 51pF OUTPUT
HIGH
OUTPUT
LOW
VIN = 5V
0
200µs
400µs
600µs
1ms
LT1032 • TPC13
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LT1032
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Waveform
Output Waveform
RL = 3k
CL = 51pF
50V
VOUT
0
– 5V
VOUT
4V
2V
0
– 2V
– 4V
LOGIC
INPUT
5V
0
10V
VS = ±12V
0
VOUT
– 10V
LOGIC
INPUT
5V
0
0
2µs
4µs
8µs
6µs
10µs
RL = 450Ω
VS = ±5V
CL = 51pF
0
4µs
8µs
12µs
LT1032 • TPC14
VOUT
LOGIC
INPUT
Strobe Pin Response
RL = 3.3k
VS = ±6V
CL = 0.01µF
4V
2V
0
– 2V
– 4V
– 6V
20µs
LT1032 • TPC15
Output Waveform Driving
Capacitive Load
6V
16µs
5V/DIV
OUTPUT
0
5V
0
STROBE
INPUT
0
10µs
20µs
30µs
40µs
50µs
LT1032 • TPC16
5V
0
VIN = 0V
RL = 3k
VS = ±12V
CL = 51pF
0
2µs
4µs
6µs
8µs
LT1032 • TPC17
UO
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PI FU CTI
S
VEE (J, N & S: Pin 1): Minus Supply. Operates –2V to –15V.
(J & N: Pins 2, 5, 9, 12/S: Pins 2, 5, 11, 14): Logic
Input. Operates properly on TTL or CMOS levels. Output
valid form (V – + 2V) ≤ VIN ≤ 15V. Connect to ground
when not used.
(J & N: Pins 3, 6, 8, 11/S: Pins 3, 6, 10, 13): Output. Line
drive output.
ON/OFF (J, N & S: Pin 4): Shuts down entire circuit.
Cannot be left open. For “normally on” operation, connect
to V +.
GND (J, N & S: Pin 7): Ground. Ground must be more
positive than V –.
Response Control (J & N: Pin 10/S: Pin 12): Allows
limited change of slew rate. Leave open when not used.
Strobe (J & N: Pin 13/ S: Pin 15): Forces all outputs low.
Drive with 3V.
VCC (J & N:Pin 14/S: Pin 15): Positive Supply. Operates 5V
to 15V.
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LT1032
W
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APPLICATI
S I FOR ATIO
Application Hints
The LT1032 is exceptionally easy to use when compared
to older drivers. Operating supply voltage can be as low as
±3V or as high as ±15V. Input levels are referred to ground.
The logic inputs are internally set at TTL levels. Outputs are
valid for input voltages from 1V above V – to 25V. Driving
the logic inputs to V – turns off the output stage. The
ON/OFF control completely turns off all supply current of
the LT1032. The levels required to drive the device on or
off are set by internal emitter-based voltages. Since the
current into the ON/OFF pin is so low, TTL or CMOS drivers
have no problem controlling the device.
The strobe pin is not fully logic compatible. The impedance
of the strobe pin is about 2kΩ to ground. Driving the strobe
pin positive forces the output stages low–even if the device
is shut off. Under worst case conditions, 3V minimum at
2mA are needed driving the strobe pin to insure strobing.
The response pin can be used to make some adjustment
in slew rate. A resistor can be connected between the response pin and the power supplies to drive 50µA to 100µA
into the pin. The response pin is a low impedance point
operating at about 0.75V above ground. For supply voltage
up to ±6V, current is turned off when the device is turned
off. For higher supply voltages, a Zener should be connected in series with the resistor to limit the voltage applied
to the response pin to 6V. Also, for temperatures above
100°C, using the response pin is not recommended. The
leakage current into the response pin at high temperatures
is excessive.
Outputs are well protected against shorts or externally
applied voltage. Tested limits are ±30V, but the device can
withstand external voltages up to breakdown of the transistors (typically about 50V). The LT1032 is usually immune
to ESD up to 2500V on the outputs with no damage.
UO
TYPICAL APPLICATI
S
Protecting Against More Than ±30V Output Overload
V+
100Ω TO
1000Ω
INPUT
1/4 LT1032
TO LINE
INPUT
1/4 LT1032
TO LINE
30V ZENERS
LT1032 • TA03b
V–
LT1032 • TA03a
FET Driver
Slew Rate Adjustment*
15V
10V †
5V
15V
50k
INPUT
80k
1/4 LT1032
LT1032
–15V
PIN 10
OR
80k
50µA
INCREASES
SLEW RATE
50µA
DECREASES
SLEW RATE
OR
LT1032 • TA04
120k
–5V
120k
–15V
†
10V
*ABOUT 4V/ms CHANGE
ZENERS PREVENT LEAKAGE DURING SHUTDOWN
LT1032 • TA05
†
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LT1032
UO
TYPICAL APPLICATI
S
TTL/CMOS Compatible Strobe
Strobing with CMOS
5V
TO LT1032
STROBE
TTL INPUT
ANY CMOS
GATE
TTL INPUT
TO PIN 13
OF LT1032
10k
LT1032 • TA07
LT1032 • TA06
Phase Shift Oscillator
R
2
1/4
LT1032CSW
3
R
C
5
1/4
LT1032CSW
6
R
9
C
1/4
LT1032CSW
8
R
f=
1
3.3RC
C
LT1032 • TA09
Operating from a Single 5V Supply
5V
1
VEE
40k*
CMOS
INPUT
15k*
14
VCC
1/4 LT1032CN
4
ON/OFF
12
7
11
OUTPUT
0.7V TO 4.8V
GND
1N4148
1N4148
LT1032 • TA10
*LEVEL SHIFTING RESISTORS
NEEDED FOR EACH INPUT
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LT1032
W
W
SI PLIFIED SCHE ATIC
LOGIC INPUT
V+
OUTPUT
R10
2k
R9
2k
Q13
1 OF 4
DRIVERS
R13
2k
Q19
Q37
Q9
Q25
Q32
R12
30k
Q8
R14
2k
Q14
Q24 Q26
R1
50k
Q29
Q7
Q18
R4
2k
Q33
C2
3pF
Q23
Q20
Q1
Q36
Q2
D3
Q17
ON/OFF
Q3
Q6
Q12
R5
600Ω
Q11
Q5
Q27
Q15 Q16
D2
Q39
Q28
Q30
Q22
Q40
R18
5k
Q10
D1
Q4
R6
7.2k
R7
21.5k
R8
1k
R11
120Ω
D4
Q34
Q21
GND
Q31
C1
10pF
R17
7.5k
R16
3Ω
2k
V
–
LT1032 • SS
RESPONSE
TIME ADJ
STROBE
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LT1032
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PACKAGE DESCRIPTIO
J Package
14-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
0.005
(0.127)
MIN
0.785
(19.939)
MAX
14
13
12
11
10
9
8
0.220 – 0.310
(5.588 – 7.874)
0.025
(0.635)
RAD TYP
1
2
3
4
5
6
7
0.200
(5.080)
MAX
0.300 BSC
(0.762 BSC)
0.015 – 0.060
(0.381 – 1.524)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
0.045 – 0.065
(1.143 – 1.651)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
0.125
(3.175)
MIN
J14 1298
OBSOLETE PACKAGE
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LT1032
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PACKAGE DESCRIPTIO
N Package
14-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.770*
(19.558)
MAX
14
13
12
11
10
9
8
1
2
3
4
5
6
7
0.255 ± 0.015*
(6.477 ± 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325 –0.015
0.005
(0.125)
MIN 0.100
(2.54)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
BSC
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
(
+0.889
8.255
–0.381
)
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
N14 1098
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LT1032
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PACKAGE DESCRIPTIO
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
0.398 – 0.413*
(10.109 – 10.490)
16
15
14
13
12
11
10
9
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
1
0.291 – 0.299**
(7.391 – 7.595)
2
3
4
5
6
7
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
8
0.037 – 0.045
(0.940 – 1.143)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.004 – 0.012
(0.102 – 0.305)
0.014 – 0.019
(0.356 – 0.482)
TYP
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
S16 (WIDE) 1098
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1032fe
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1032
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TYPICAL APPLICATION
±5V to ±15V Voltage Multiplier
5V
14
LT1032
2
3
5
6
1N4148
470µF
1N4148
VOUT
13.7V AT NO LOAD
12V AT 10mA
+
+
470µF
fCLK = 1kHz
5V
0V
470µF
8
9
1N4148
–VOUT
–13.7V AT NO LOAD
470µF –12V AT 10mA
+
+
11
12
1N4148
1
–5V
LT1032 • TA08
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1039A
Triple RS232 Driver/Receiver with Shutdown
±15kV ESD Protection
LT1130A/LT1140A
5V Supply, Multiple RS232 Driver/Receiver
±15kV 3 Driver/5 Receiver (LT1133A, LT1137A, LT1141A)
LT1780/LT1781A
5V Supply, 2 Driver/2 Receiver RS232
±15kV Pin Compatible Upgrade to LT1080/LT1081 and LT1180A/LT1181A
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Linear Technology Corporation
LT/TP 0302 1.5K REV E • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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 LINEAR TECHNOLOGY CORPORATION 1994