Datenblatt-pdf.com


LT1782 Schematic ( PDF Datasheet ) - Linear Technology

Teilenummer LT1782
Beschreibung Micropower/ Over-The-Top SOT-23/ Rail-to-Rail Input and Output Op Amp
Hersteller Linear Technology
Logo Linear Technology Logo 




Gesamt 12 Seiten
LT1782 Datasheet, Funktion
FEATURES
s Operates with Inputs Above V+
s Rail-to-Rail Input and Output
s Micropower: 55µA Supply Current Max
s Small SOT-23 Package
s Low Input Offset Voltage: 800µV Max
s Single Supply Input Range: 0V to 18V
s High Output Current: 18mA Min
s Specified on 3V, 5V and ±5V Supplies
s Output Shutdown on 6-Lead Version
s Reverse Battery Protection to 18V
s High Voltage Gain: 1500V/mV
s Gain Bandwidth Product: 200kHz
s Slew Rate: 0.07V/µs
s Operating Temperature Range: –40°C to 85°C
U
APPLICATIO S
s Portable Instrumentation
s Battery- or Solar-Powered Systems
s Sensor Conditioning
s Supply Current Sensing
s Battery Monitoring
s MUX Amplifiers
s 4mA to 20mA Transmitters
TYPICAL APPLICATIO
Positive Supply Rail Current Sense
V+
5V TO 18V
200
5V
0.2
200
+
LT1782
LOAD ILOAD
2N3904
VOUT = 2(ILOAD)
0V TO 4.3V
2k
1782 TA01
LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
DESCRIPTIO
The LT®1782 is a 200kHz op amp available in the small
SOT-23 package that operates on all single and split
supplies with a total voltage of 2.5V to 18V. The amplifier
draws less than 55µA of quiescent current and has reverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-TopTM opera-
tion capability with either or both of its inputs above the
positive rail. The inputs handle 18V both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring even when the inputs are 9V
below the negative supply.
The LT1782 can drive loads up to 18mA and still maintain
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
impedance and reducing quiescent current to 5µA. The
LT1782 op amp is available in the 5- and 6-lead
SOT-23 packages. For applications requiring higher speed,
refer to the LT1783.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
Distribution of Input Offset Voltage
25
VS = 5V, 0V
VCM = 2.5V
20
15
10
5
0
–900
–600 –300 0 300 600 900
INPUT OFFSET VOLTAGE (µV)
1782 TA01a
1






LT1782 Datasheet, Funktion
LT1782
TYPICAL PERFOR A CE CHARACTERISTICS
Noise Voltage Density vs
Frequency
80
70
60
50
40
30
20
1
10 100 1k
FREQUENCY (Hz)
10k
1782 G08
Gain Bandwidth Product vs
Temperature
230
f = 5kHz
220 VS = ±2.5V
210
200
190
180
170
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1782 G11
Gain Bandwidth Product and
Phase Margin vs Load Resistance
70
PHASE MARGIN
60
VS = ±2.5V
250
AV = –1
RF = RG = 10k
f = 5kHz
200
50
GAIN BANDWIDTH PRODUCT
150
100
50
1k
10k
LOAD RESISTANCE ()
100k
1782 G14
Input Noise Current vs Frequency
0.40
0.35 VS = ±2.5V
0.30
0.25
0.20
0.15
0.10
0.05
0
1 10 100 1k 10k
FREQUENCY (Hz)
1782 G09
Gain and Phase Shift vs
Frequency
70 100
60 VS = ±2.5V 80
50 PHASE 60
40 40
30 20
20 GAIN 0
10 –20
0 –40
–10 –60
–20 –80
–30
1k
10k 100k
FREQUENCY (Hz)
–100
1M
1782 G10
Slew Rate vs Temperature
0.11
VS = ±2.5V
0.10
RISING
0.09
0.08
FALLING
0.07
0.06
0.05
0.04
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1782 G12
Gain Bandwidth Product and
Phase Margin vs Supply Voltage
60
PHASE MARGIN
240
55
50
220
GAIN BANDWIDTH PRODUCT
200
AV = –1
180 RF = RG = 10k
f = 5kHz
160
0
2 4 6 8 10 12 14 16 18
TOTAL SUPPLY VOLTAGE (V)
1782 G13
PSRR vs Frequency
90
80 VS = ±2.5V
70
60
50 POSITIVE SUPPLY
40
30
20
10
NEGATIVE SUPPLY
0
–10
1k
10k 100k
FREQUENCY (Hz)
1M
1782 G15
CMRR vs Frequency
110
100
VS = ±2.5V
90
80
70
60
50
40
30
1k
10k
FREQUENCY (Hz)
100k
1782 G16
6

6 Page









LT1782 pdf, datenblatt
LT1782
TYPICAL APPLICATIO S
Current Source
VCC
LT1634-1.25
R1
+
LT1782
2N3906
IOUT
=
1.25V
R1
1782 TA02
Protected Fault Conditions
OK! –18V
V+
OK! 5V
LT1782
LT1782
+
24V
REVERSE BATTERY
INPUT OVERVOLTAGE
OK! 5V
+
18V LT1782
OK! 5V
LT1782
INPUT DIFFERENTIAL VOLTAGE
10V
INPUT BELOW GROUND
1782 TA03
RELATED PARTS
PART NUMBER
LT1783
LT1490/LT1491
LT1636
LT1638/LT1639
DESCRIPTION
Micropower Over-The-Top SOT-23 Rail-to-Rail Input
and Output Op Amp
Dual/Quad Over-The-Top Micropower Rail-to-Rail Input
and Output Op Amps
Single Over-The-Top Micropower Rail-to-Rail Input
and Output Op Amp
Dual/Quad, 1.2MHz, 0.4V/µs, Over-The-Top Micropower
Rail-to-Rail Input and Output Op Amps
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
COMMENTS
SOT-23 Package, Micropower 210µA per Amplifier, Rail-to-Rail Input
and Output , 1.25MHz GBW
Single Supply Input Range: –0.4V to 44V, Micropower 50µA per
Amplifier, Rail-to-Rail Input and Output , 200kHz GBW
55µA Supply Current, VCM Extends 44V Above VEE, Independent of
VCC, MSOP Package, Shutdown Function
170µA Supply Current, Single Supply Input Range: –0.4V to 44V,
Rail-to-Rail Input and Output
1782f LT/TP 0400 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999

12 Page





SeitenGesamt 12 Seiten
PDF Download[ LT1782 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LT1780Low Power 5V RS232 Dual Driver/Receiver with 15kV ESD ProtectionLinear Technology
Linear Technology
LT1781Low Power 5V RS232 Dual Driver/Receiver with 15kV ESD ProtectionLinear Technology
Linear Technology
LT1782Micropower/ Over-The-Top SOT-23/ Rail-to-Rail Input and Output Op AmpLinear Technology
Linear Technology
LT17831.25MHz/ Over-The-Top Micropower/ Rail-to-Rail Input and Output Op Amp in SOT-23Linear Technology
Linear Technology
LT1784Over-The-Top Low Power / Rail-to-Rail Input and Output Op Amp in SOT-23Linear Technology
Linear Technology

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche