Datasheet

LTC6255/LTC6256/LTC6257
24
625567fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
® LINEAR TECHNOLOGY CORPORATION 2010
LT 0911 REV B • PRINTED IN USA
typicAl ApplicAtion
relAteD pArts
PART NUMBER DESCRIPTION COMMENTS
LTC6246/LTC6247/
LTC6248
180MHz, 1µA, Power Efficient Rail-to-Rail Op Amps 180MHz GBW, 1mA, 500μV V
OS
, RR In/Out, 2.5V to 5.25V, 90V/µs
Slew Rate
LT1498/LT1499 10MHz, 6V/µs, Dual/Quad,Rail-to-Rail Input and Output,
Precision C-Load Op Amps
10MHz GBW, 1.7mA, 475μV V
OS
, RR In/Out, 2.2V to ±15V, 10nF C
LOAD
LTC6081/LT6082 Precision Dual/Quad CMOS Rail-to-Rail Input/Output
Amplifiers
3.6MHz GBW, 330μA, 70μV V
OS
, RR In/Out, 2.7V to 5.5V, 100dB CMRR
LTC2050/LTC2051/
LTC2052
Zero-Drift Operational Amplifiers in SOT-23 3MHz GBW, 800μA, 3μV V
OS
, V
–
to V
+
– 1V In, RR Out, 2.7V to 6V, 130dB
CMRR/PSRR
LTC1050/LTC1051/
LTC1052
Precision Zero-Drift, Operational Amplifierwith Internal
Capacitors
2.5MHz GBW, 1mA, 5μV V
OS
, V
–
to V
+
– 2.3V In, RR Out, 4.75V to 16V,
120dB CMRR, 125dB PSRR
LTC6084/LTC6085 Dual/Quad 1.5MHz, Rail-to-Rail, CMOS Amplifiers 1.5MHz GBW, 110μA, 750μV V
OS
, RR In/Out, 2.5V to 5.5V
LT1783 1.25MHz, Over-The-Top
®
Micropower, Rail-to-Rail Input
and Output Op Amp in SOT-23
1.25MHz GBW, 300μA, 800μV V
OS
, RR In/Out, 2.5V to 18V
LT1637/LT1638/
LT1639
1.1MHz, 0.4V/μs Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
1.1MHz GBW, 250μA, 350μV V
OS
, RR In/Out, 2.7V to 44V, 110dB CMRR
LT2054/LT2055 Single/Dual Micropower Zero-Drift Operational Amplifiers 500kHz GBW, 150μA, 3μV V
OS
, V
–
to V
+
– 0.5V In, RR Out, 2.7V to 6V
LT6010/LT6011/
LT6012
135μA, 14nV/√Hz, Rail-to-Rail Output Precision Op Amp
with Shutdown
330kHz GBW, 135μA, 35μV V
OS
, V
–
+ 1.0V to V
+
– 1.2V In, RR Out,
2.7V to 36V
LT1782 Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and
Output Op Amp
200kHz GBW, 55μA, 800μV V
OS
, RR In/Out, 2.5V to 18V
LT1636 Over-The-Top, Micropower Rail-to-Rail, Input and Output
Op Amp
200kHz GBW, 50μA, 225μV V
OS
, RR In/Out, 2.7V to 44V, –40°C to 125°C
LT1490A/LT1491A Dual/Quad Over-The-Top, Micropower Rail-to-Rail Input
and Output Op Amps
200kHz GBW, 50μA, 500μV V
OS
, RR In/Out, 2V to 44V
LT2178/LT2179 17μA Max, Dual and Quad, Single Supply, Precision
Op Amps
85kHz GBW, 17μA, 70μV V
OS
, RR In/Out, 5V to 44V
LT6000/LT6001/
LT6002
Single, Dual and Quad, 1.8V, 13μA Precision Rail-to-Rail
Op Amps
50kHz GBW, 16μA , 600μV V
OS(MAX)
, RR In/Out, 1.8V to 18V
Time Domain Response Showing 2µs Rise Time. Top
Waveform Is V
IN
. Middle Waveform Is the 10mA to 1A Step
Measured at R3, then the 0mA to 1A Step Showing Extra
2.7µs Delay When Recovering From 0mA
2µs Rise Time Analog 1A Pulsed LED Current Driver.
LTC6255 Applied as a LED Current Driver with 2µs Rise Time
+
–
I
LED
= V
IN
• 200mA/V
I
LED
625567 TA02a
LTC6255
C1
220pF
Q1
Q1 TO Q3
MOSFETs
3× 2N7000
LED
OSRAM
LRW5SM
Q2 Q3
V
IN
5V
5V
5V
R1
9.76k
R4
51Ω
R2
200Ω
SHDN
R
UP
1M**
R5
240Ω
R
SD
100k*
R3
0.1Ω
100mW
* R
SD
GUARANTEES LED OFF WHEN OP AMP SHDN. OTHERWISE OPTIONAL.
** R
UP
FORCES LED COMPLETELY OFF WHEN V
IN
= 0. OTHERWISE OPTIONAL.
STANDBY SUPPLY CURRENT WITH V
IN
= 0: 65µA R
UP
OPEN
650µA R
UP
INSTALLED
10% TO 90% RISE TIME: 10mA TO 1A, 2µs
0mA TO 1A, ADD 2.7µs DELAY
625567 TA02b
10mA TO 1A
0mA TO 1A
(EXTRA DELAY)
V
IN