1
dc2432bfb
DEMO MANUAL DC2432B
DESCRIPTION
LT6658
Precision Dual Output, High Current,
Low Noise, Voltage Reference
Demonstration circuit 2432B features the
, a preci-
sion dual output reference that combines the performance
of a low drift low noise reference and a linear regulator.
Demonstration circuits are available with 1.25V, 2.5V, 3.0V,
3.3V, 4.096V and 5V output option parts. 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 for powering mi-
crocontrollers and other supporting devices. Both outputs
have the same precision specifications and track each
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Refulator is a trademark of Analog Devices, Inc. All other trademarks are the property of their
respective owners.
PERFORMANCE SUMMARY
LT6658 BLOCK DIAGRAM
other over temperature. Each output 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.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2432B
Specifications are at T
A
= 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Input Supply Range
5V
36
V
V
OUT
Output Voltage Accuracy
–0.05
+0.05
%
Temperature Drift
10
ppm
I
Q
Supply Current
2
mA
Load Regulation
OUT1
0mA to 150mA
2
µV/mA
Load Regulation
OUT2
0mA to 50mA
3.75
µV/mA
14
4
16
15
1
2
6
3
5
9
17
10
8
7
12
13
11
R3
R4
R1
R2
V
IN
THERMAL
SHUTDOWN
DNC
DNC
NC
GND
GND
GND
GND
OD
V
IN2
V
IN1
V
OUT2_F
V
OUT1_F
V
OUT2_S
V
OUT1_S
NR
BYPASS
DC2432 BD
BANDGAP
BUFFER 2
BUFFER 1
Voltage Option
(V)
R1
(Ω)
R2
(Ω)
R3, R4
(Ω)
1.2
400
9600
768
1.8
400
2903
705
2.5
400
OPEN
800
3
400
OPEN
800
3.3
400
OPEN
800
5
400
OPEN
800
