LT6656 Linear Technology Corporation, LT6656 Datasheet - Page 3

• Manufacturer Part Number: LT6656
• Description: 1?a Precision Series Voltage Reference
• Manufacturer: Linear Technology Corporation

elecTrical characTerisTics
temperature range, otherwise specifications are at T
PARAMETER
Output Voltage Error
Output Voltage Temperature Coefficient (Note 4)
Line Regulation
Load Regulation (Note 5)
Dropout Voltage (Note 6)
Supply Current
Output Short Circuit Current
Input Reverse Leakage Current
Reverse Output Current
Output Voltage Noise (Note 7)
Turn-On Time
Long Term Drift of Output Voltage (Note 8)
Hysteresis (Note 9)
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: If the parts are stored outside of the specified temperature range,
the output may shift due to hysteresis.
Note 3: The stated temperature is typical for soldering of the leads during
manual rework. For detailed IR reflow recommendations, refer to the
Applications section.
Note 4: Temperature coefficient is measured by dividing the maximum
change in output voltage by the specified temperature range.
Note 5: Load regulation is measured with a pulse from no load to the
specified load current. Output changes due to die temperature change
must be taken into account separately.
Note 6: Excludes load regulation errors.
Note 7: Peak-to-peak noise is measured with a 3-pole highpass filter at
0.1Hz and a 4-pole lowpass filter at 10Hz. The unit is enclosed in a still-air
CONDITIONS
LT6656A
LT6656B
LT6656A
LT6656B
V
I
V
Sourcing, Short V
Sinking, Short V
V
V
0.1Hz to 10Hz
10Hz to 1kHz
0.1% Settling
∆T = 0°C to 70°C
∆T = –40°C to 85°C
SOURCE
IN
OUT
IN
IN
I
I
= (V
= -18V, V
= GND, V
SOURCE
SOURCE
Error ≤ 0.1%
A
OUT
= 5mA
= 25°C. V
= 0µA
= 5mA
+ 0.5V) to 18V
OUT
OUT
The
OUT
= GND
= 18V
OUT
l
IN
to V
denotes the specifications which apply over the specified
to GND
= V
IN
OUT
environment to eliminate thermocouple effects on the leads. The test
time is 10 seconds. RMS noise is measured on a spectrum analyzer in a
shielded environment.
Note 8: Long term stability typically has a logarithmic characteristic and
therefore, changes after 1000 hours tend to be much smaller than before
that time. Total drift in the second thousand hours is normally less than
one third that of the first thousand hours with a continuing trend toward
reduced drift with time. Long-term stability will also be affected by
differential stresses between the IC and the board material created during
board assembly.
Note 9: Hysteresis in output voltage is created by mechanical stress
that differs depending on whether the IC was previously at a higher or
lower temperature. Output voltage is always measured at 25°C, but
the IC is cycled to the hot or cold temperature limit before successive
measurements. For instruments that are stored at well controlled
temperatures (within 20 or 30 degrees of operational temperature)
hysteresis is usually not a dominant error source.
+ 500mV, C
L
l
l
l
l
l
l
l
= 1µF , I
–0.05
–0.10
MIN
L
= 0, unless otherwise noted. (Note 9)
0.85
TYP
12
65
18
35
30
60
80
25
50
25
70
5
2
3
4
MAX
0.05
0.10
150
375
500
1.0
1.5
10
20
25
40
10
40
LT6656
ppm/√kHr
ppm/mA
ppm/mA
ppm/°C
ppm/°C
ppm/V
ppm/V
µV
UNITS
µV

ppm
ppm
6656f
RMS
mV
mV
mV
mA
mA
ms
P-P
µA
µA
µA
µA
%
%