|
|
PDF LT1490A Data sheet ( Hoja de datos )
| Número de pieza | LT1490A | |
| Descripción | Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LT1490A (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
LT1490A
Dual Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amp
FEATURES
s Low Input Offset Voltage: 500µV Max
s Output Swings to 10mV Max from V –
s Rail-to-Rail Input and Output
s Micropower: 50µA/Amplifier Max
s MSOP Package
s Over-The-TopTM Input Common Mode Range Extends
44V Above V –, Independent of V +
s Specified on 3V, 5V and ±15V Supplies
s High Output Current: 20mA
s Output Drives 10,000pF with Output Compensation
s Reverse Battery Protection to 18V
s No Supply Sequencing Problems
s High Voltage Gain: 1500V/mV
s High CMRR: 98dB
s No Phase Reversal
s Gain Bandwidth Product: 200kHz
U
APPLICATIO S
s Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
s Supply Current Sensing
s Battery Monitoring
s Micropower Active Filters
s 4mA to 20mA Transmitters
DESCRIPTIO
The LT®1490A is an enhanced version of the popular LT1490
op amp with improved input offset voltage (500µV max) and
output voltage swing (10mV max from V –). It is recom-
mended for all new designs. The LT1490A operates on all
single and split supplies with a total voltage of 2V to 44V,
drawing only 40µA of quiescent current per amplifier. It is
reverse supply protected; it draws virtually no current for
reverse supply up to 18V. The input range of the LT1490A
includes both supplies and the output swings to both sup-
plies. Unlike most micropower op amps, the LT1490A can
drive heavy loads; its rail-to-rail output drives 20mA. The
LT1490A is unity-gain stable and drives all capacitive loads
up to 10,000pF when optional 0.22µF and 150Ω compensa-
tion is used.
The LT1490A has a unique input stage that operates and
remains high impedance when above the positive supply.
The inputs take 44V both differential and common mode
even when operating on a 3V supply. Built-in resistors
protect the inputs for faults below the negative supply up to
15V. There is no phase reversal of the output for inputs 15V
below V – or 44V above V –, independent of V +.
The LT1490A dual op amp is available in the 8-pin MSOP,
PDIP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Battery Monitor
CHARGER
VOLTAGE
RS
0.2Ω
RA
2k
+
Q1
2N3904
IBATT
RA´
2k
1/2 LT1490A
–
–
1/2 LT1490A
LOGIC
+
LOAD
RB
2k
RB´
2k
+
VBATT = 12V
Q2
+ 2N3904
1/2 LT1490A
–
S1
RG
10k
10k
LOGIC HIGH (5V) = CHARGING
LOGIC LOW (0V) = DISCHARGING
+
1/2 LT1490A
–
90.9k
VOUT
14901A TA01
IBATT
=
VOUT
=
(RS)(RG/RA)(GAIN)
VOUT AMPS
GAIN
S1 = OPEN, GAIN = 1
S1 = CLOSED, GAIN = 10
RA = RB
VS = 5V, 0V
1
1 page  
TYPICAL PERFOR A CE CHARACTERISTICS
LT1490A
Supply Current vs Supply Voltage
80
70
TA = 125°C
60
TA = 25°C
50
40 TA = –55°C
30
20
10
0
0 5 10 15 20 25 30 35 40 45
TOTAL SUPPLY VOLTAGE (V)
1490A G01
Output Saturation Voltage
vs Load Current (Output High)
1
VS = 5V, 0V
TA = 125°C
100m
TA = 25°C
TA = –55°C
Minimum Supply Voltage
400
300
200
100
0
– 100
TA = 25°C
TA = –55°C
– 200
–300 TA = 125°C
– 400
0
1 234
TOTAL SUPPLY VOLTAGE (V)
5
1490A G02
Output Saturation Voltage
vs Load Current (Output Low)
1
VS = 5V, 0V
100m
10m
TA = 125°C
TA = 25°C
TA = –55°C
10m
1µ
10µ 100µ 1m 10m 100m
SOURCING LOAD CURRENT (A)
1490A G04
0.1Hz to 10Hz Noise Voltage
VS = ±2.5V
0 1 2 3 4 5 6 7 8 9 10
TIME (SEC)
1490A G07
1m
0.1µ
1µ 10µ 100µ 1m 10m 100m
SINKING LOAD CURRENT (A)
1490A G05
Noise Voltage Density
vs Frequency
80
70
60
50
40
30
1
10 100
FREQUENCY (Hz)
1k
1490A G08
Input Bias Current
vs Common Mode Voltage
5000
VS = 5V, 0V
3000
1000
30
20
10
TA = –55°C
TA = 25°C
TA = 125°C
0
–10
4.0
4.4 4.8 5.2 5.6
COMMON MODE VOLTAGE (V)
44
1490A G03
Output Saturation Voltage
vs Input Overdrive
100
VS = 5V, 0V
90 NO LOAD
80
70
60
50
40
30
OUTPUT HIGH
20
10 OUTPUT LOW
0
0 10 20 30 40 50
INPUT OVERDRIVE (mV)
1490A G06
Input Noise Current vs Frequency
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
1 10 100 1k
FREQUENCY (Hz)
1490A G09
5
5 Page 
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8 765
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
12
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
(0.406 – 1.270)
0.014 – 0.019
(0.355 – 0.483)
TYP
*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
34
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
SO8 1298
LT1490A
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 LT1490A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LT1490 | Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps | Linear Technology |
| LT1490A | Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp | Linear Technology |
| LT1490ACMS8 | Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp | Linear Technology |
| LT1490ACN8 | Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp | Linear Technology |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |