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PDF LT6658 Data sheet ( Hoja de datos )
| Número de pieza | LT6658 | |
| Descripción | Voltage Reference | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Features
nn Dual Output Tracking Reference
nn Each Output Configurable: 2.5V to 6V
nn Output 1: 150mA Source/20mA Sink
nn Output 2: 50mA Source/20mA Sink
nn Low Drift:
nn A-Grade: 10ppm/°C Max
nn B-Grade: 20ppm/°C Max
nn High Accuracy:
nn A-Grade: ±0.05% Max
nn B-Grade: ±0.1% Max
nn Low Noise: 1.5ppmP-P (0.1Hz to 10Hz)
nn Wide Operating Voltage Range to 36V
nn Load Regulation: 0.1ppm/mA
nn AC PSRR: 96dB at 10kHz
nn Kelvin Sense Connection on Outputs
nn Thermal Shutdown
nn Separate Supply Pins for Each Output
nn Available in Exposed Pad Package MSE16
Applications
nn Microcontroller with ADC/DAC Applications
nn Data Acquisition Systems
nn Automotive Control and Monitoring
nn Precision Low Noise Regulators
nn Instrumentation and Process Control
LT6658
Precision Dual Output,
High Current, Low Noise,
Voltage Reference
Description
The LT®6658 precision 2.5V dual output reference com-
bines the performance of a low drift low noise reference
and a linear regulator. Both outputs are ideal for driving
the precision reference inputs of high resolution ADCs and
DACs, even with heavy loading while simultaneously acting
as output supplies powering microcontrollers and other
supporting devices. Both outputs have the same precision
specifications and track each other over temperature and
load. Both outputs are nominally 2.5V, however each can
be configured with external resistors to give an output
voltage up to 6V.
Using Kelvin connections, the LT6658 typically has
0.1ppm/mA load regulation with up to 150mA load current.
A noise reduction pin is available to band-limit and lower
the total integrated noise.
Dual outputs provide flexibility for powering reference
and regulator applications and localizing PCB routing. The
outputs have excellent supply rejection and are stable with
1µF to 50µF capacitors.
Short circuit and thermal protection help maintain stability
and prevent thermal overstress. The LT6658 is offered in
the MSE16 exposed pad package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical Application
Precision Dual Output 2.5V Reference and Supply
Output Voltage Temperature Drift Both Outputs
2.502
VIN
5V TO 36V
VIN1
VOUT2_F
VIN2
VOUT2_S
VIN
OD LT6658-2.5
0.1µF
VOUT1_F
BYPASS
VOUT1_S
1µF GND
RLOAD2
VOUT2
2.5V
50mA
1µF
RLOAD1
VOUT1
2.5V
150mA
1µF
6658 TA01a
2.501
2.500
2.499
2.498
–50 –25
ILOAD1 = 150mA
VOUT1
VOUT2
0 25 50 75 100 125 150
TEMPERATURE (°C)
6658 TA01b
For more information www.linear.com/LT6658
6658f
1
1 page  
LT6658
Typical Performance Characteristics
VOUT2_F + 2.5V, COUT1 = COUT2 = 1µF, ILOAD = 0mA, unless otherwise noted.
T2e.5mVpVeOraUtTu1reOuDtrpiuftt Voltage
2.502
THREE TYPICAL PARTS
2Te.5mVpVeOraUtTu2reOuDtrpiuftt Voltage
2.502
THREE TYPICAL PARTS
TA = 25°C, VIN = VIN1 = VIN2 = VOUT1_F + 2.5V =
2V.o5ltVagVeOUvTs1TaenmdpVeOrUaTtu2rOeuwtpituht
150mA Load on VOUT1
2.502
2.501
2.501
2.501
2.500
2.500
2.500
2.499
2.498
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
6658 G01
2.5V VOUT1 Load Regulation,
Sourcing
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0.1
125°C
25°C
–40°C
1 10 100 500
OUTPUT CURRENT (mA)
6658 G04
S2.i5nVkinVgOUT2 Load Regulation,
18
125°C
15
25°C
–40°C
12
9
6
3
0
0.1 1 10 100
OUTPUT CURRENT (mA)
6658 G07
2.499
2.498
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
6658 G02
2.5V VOUT2 Load Regulation,
Sourcing
5
0
–5
–10
–15
–20
–25
0.1
125°C
25°C
–40°C
1 10
OUTPUT CURRENT (mA)
100
6658 G05
2.5V Line Regulation VOUT1
2.502
2.501
2.500
2.499
2.498
2.497
2.496
0
125°C
25°C
–40°C
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
6658 G08
For more information www.linear.com/LT6658
2.499
2.498
–50 –25
ILOAD1 = 150mA
VOUT1
VOUT2
0 25 50 75 100 125 150
TEMPERATURE (°C)
6658 G03
2.5V VOUT1 Load Regulation,
Sinking
24
20
16
12
8
4 125°C
25°C
–40°C
0
1 10 100
OUTPUT CURRENT (mA)
6658 G06
2.5V Line Regulation VOUT2
2.502
2.501
2.500
2.499
2.498
2.497
2.496
0
125°C
25°C
–40°C
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
6658 G09
6658f
5
5 Page 
LT6658
Pin Functions
GND (Pins 1, 2, 6, Exposed Pad Pin 17): These pins are
the main ground connections and should be connected into
a star ground or ground plane. The exposed pad must be
soldered to ground for good electrical contact and rated
thermal performance.
BYPASS (Pin 3): Bypass Pin. This requires a 1μF capacitor
for bandgap stability.
DNC (Pin 4, 16): Do Not Connect. Keep leakage current
from these pins to a minimum.
NR (Pin 5): Noise Reduction Pin. To band limit the noise
of the reference, connect a capacitor between this pin and
ground. See Applications Information section.
VOUT2_S (Pin 7): VOUT2 Sense Pin. Connect this Kelvin
sense pin at the load.
VOUT2_F (Pin 8): VOUT2 Output Voltage. A 1μF to 50μF
output capacitor is required for stable operation. This
output can source up to 50mA.
OD (Pin 9): Output Disable. This active low input disables
both outputs.
VIN2 (Pin 10): Input Voltage Supply for Channel 2. Bypass
VIN2 with 0.1μF capacitor to ground. This pin supplies
power to buffer amplifier 2.
VIN1 (Pin 11): Input Voltage Supply for Channel 1. Bypass
VIN1 with 0.1μF capacitor to ground. This pin supplies
power to buffer amplifier 1.
VOUT1_F (Pin 12): VOUT1 Output Voltage. A 1μF to 50μF
output capacitor is required for stable operation. This
output can source up to 150mA.
VOUT1_S (Pin 13): VOUT1 Sense Pin. Connect this Kelvin
sense pin at the load.
VIN (Pin 14): Input Voltage Supply. Bypass VIN with 0.1μF
capacitor to ground.
NC (Pin 15): No Connect.
For more information www.linear.com/LT6658
6658f
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LT6658.PDF ] | |
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