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PDF LT1635 Data sheet ( Hoja de datos )
| Número de pieza | LT1635 | |
| Descripción | Micropower Rail-to-Rail Op Amp and Reference | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Guaranteed Operation at 1.2V
s Op Amp and Reference on Single Chip
s Micropower: 130µA Supply Current
s Industrial Temperature Range SO-8 Packages
s Rail-to-Rail Output
s High Output Current: 25mA Min
s Output Drives 1000pF
s Capable of Floating Mode Operation
s Specified for 5V and ±5V Supplies
s Low Reference Drift: 30ppm/°C
s Industry Standard LM10 Pinout
U
APPLICATIONS
s Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
s Precision Current Regulators
s Precision Voltage Regulators
s Battery Level Indicator
s Thermocouple Transmitter
TYPICAL APPLICATION
0V to 5V Regulator
C1
0.01µF
R1
100k
VIN > 5.2V
2– 7
6
LT1635
3+ 4
R2 8
3.9k 1
VOUT
0V TO 5V
VOUT
ADJ
R3
5k
1635 TA01
LT1635
Micropower Rail-to-Rail
Op Amp and Reference
DESCRIPTION
The LT®1635 is a new analog building block that includes a
rail-to-rail output op amp, a precision reference and reference
buffer. The device operates from supplies as low as a single
1.2V or up to ±5V, yet it consumes only 130µA of supply
current.
The input common mode range of the op amp includes
ground and incorporates phase reversal protection to pre-
vent false outputs from occurring when the input is below
the negative supply. The rail-to-rail output stage can swing to
within 15mV of each rail with no load and can swing to within
250mV of each rail while delivering 10mA of output current.
The gain bandwidth of the op amp is 175kHz and it is unity-
gain stable with up to 1000pF load capacitance.
The 0.2V reference is referred to V– and includes a buffer
amplifier to enhance flexibility. The reference and buffer
combine to achieve a drift of 30ppm/°C, a line regulation of
20ppm/V and a load regulation of 150ppm/mA.
The LT1635 is available in 8-pin PDIP and SO packages, and
has the industry standard LM10 pinout.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Typical Distribution of Input Offset Voltage
25
VS = 5V, 0V
TA = 25°C
20
15
10
5
0
– 1.0
– 0.6 – 0.2 0.2 0.6
INPUT OFFSET VOLTAGE (mV)
1.0
1635 TA02
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS Op Amp
LT1635
Supply Current vs Supply Voltage
220
200
TA = – 55°C
180
160
140 TA = 25°C
120
100 TA = 125°C
80
60
2 3 4 5 6 7 8 9 10
SUPPLY VOLTAGE (V)
1635 G01
0.1Hz to 10Hz Noise Voltage
VS = ± 5V
TA = 25°C
0 1 2 3 4 5 6 7 8 9 10
TIME (SEC)
1635 G04
Typical Distribution of Offset
Voltage Drift with Temperature
25
VS = 5V, 0V
20
15
10
5
0
–6 –4 –2
0
2
TCVOS (µV/°C)
46
1635 G07
Input Bias and Offset Currents
vs Temperature
100
VS = 5V, 0V
IOS
50
0
–1
IB
–2
–3
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1635 G02
Noise Voltage Density
vs Frequency
80
VS = ± 2.5V
TA = 25°C
70
60
50
40
30
1
10 100
FREQUENCY (Hz)
1000
1635 G05
Minimum Supply Voltage
200
0
– 200
– 400
– 600
– 800
TA = 125°C
TA = 25°C
TA = – 55°C
– 1000
0
1
TOTAL SUPPLY VOLTAGE (V)
2
1635 G08
Input Bias Current
vs Common Mode Voltage
0
VS = 5V, 0V
– 1 TA = 125°C
TA = 25°C
–2
TA = – 55°C
–3
–4
–5
–1
0 1 23
COMMON MODE VOLTAGE (V)
4
1635 G03
Input Noise Current vs Frequency
0.5
VS = ± 2.5V
TA = 25°C
0.4
0.3
0.2
0.1
0
1 10 100
FREQUENCY (Hz)
Turn-On Drift
of Three Typical Units
140
120
1000
1635 G06
100
80
60
40
20 VS = ± 5V
TA = 25°C
0
0 1 2 3 4 5 6 7 8 9 10
TIME AFTER POWER ON (MINUTES)
1635 G09
5
5 Page 
WW
SI PLIFIED SCHEMATICS
Op Amp
2
INPUTS
3
R1
6k
R2
6k
Q1
Q2
300k
5
BALANCE
C2
Q4
Q3 Q5
Q7
Q6
Q15
Q13
Q14 Q16
Q21
Q20
Q19
Q26
Q17 Q18
Q24
C1
V+ 7
Reference
V– 4
× 16
×1
REF FB
8
1 REFOUT
1635 SSREF
LT1635
7 V+
Q28
6 OUTPUT
Q27
Q25
4 V–
1635 SSOA
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
0.300 – 0.325
(7.620 – 8.255)
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.400*
(10.160)
MAX
87 65
0.009 – 0.015
(0.229 – 0.381)
+0.025
0.325 –0.015
( )8.255
+0.635
–0.381
0.065
(1.651)
TYP
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
0.255 ± 0.015*
(6.477 ± 0.381)
0.125
(3.175)
MIN
0.018 ± 0.003
0.015
(0.380)
MIN
12
(0.457 ± 0.076)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
34
N8 0695
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1635.PDF ] | |
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