FEATURES
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LT6654
SOT-23 Precision Wide
Supply High Output Drive
Low Noise Reference
DESCRIPTION
The LT
®
6654 is a family of small precision voltage ref-
erences that offers high accuracy, low noise, low drift,
low dropout and low power. The LT6654 operates from
voltages up to 36V and is fully specified from –55°C to
125°C. A buffered output ensures ±10mA of output drive
with low output impedance and precise load regulation.
These features, in combination, make the LT6654 ideal
for portable equipment, industrial sensing and control,
and automotive applications.
The LT6654 was designed with advanced manufactur-
ing techniques and curvature compensation to provide
10ppm/°C temperature drift and 0.05% initial accuracy.
Low thermal hysteresis ensures high accuracy and
1.6ppm
P-P
noise minimizes measurement uncertainty.
Since the LT6654 can also sink current, it can operate
as a low power negative voltage reference with the same
precision as a positive reference.
The LT6654 references are offered in 6-lead SOT-23
package and an 8-lead LS8 package. The LS8 is a 5mm
×
5mm surface mount hermetic package that provides
outstanding stability.
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.
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Low Drift:
A-Grade: 10ppm/°C Max
B-Grade: 20ppm/°C Max
High Accuracy:
A-Grade: ±0.05% Max
B-Grade: ±0.10% Max
Low Noise: 1.6ppm
P-P
(0.1Hz to 10Hz)
Wide Supply Range to 36V
Low Thermal Hysteresis: LS8 15ppm (–40°C to 125°C)
Long Term Drift: (LS8) 15ppm/√kHr
Line Regulation (Up to 36V): 5ppm/V Max
Low Dropout Voltage: 100mV Max
Sinks and Sources ±10mA
Load Regulation at 10mA: 8ppm/mA Max
Fully Specified from –55°C to 125°C
Available Output Voltage Options: 1.25V, 2.048V, 2.5V,
3V, 3.3V, 4.096V, 5V
Low Profile (1mm) ThinSOT™ Package and 5mm
×
5mm Surface Mount Hermetic Package
Automotive Control and Monitoring
High Temperature Industrial
High Resolution Data Acquisition Systems
Instrumentation and Process Control
Precision Regulators
Medical Equipment
APPLICATIONS
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TYPICAL APPLICATION
Basic Connection
4
C
IN
0.1μF
6
C
L
1μF
6654 TA01a
Output Voltage Temperature Drift
0.10
3 TYPICAL PARTS
LT6654-2.5
1
2
V
OUT
ACCURACY (%)
(V
OUT
+ 0.5V) < V
IN
< 36V
LT6654
V
OUT
0.05
0.00
–0.05
–0.10
–60 –40 –20 0 20 40
60 80 100 120 140
TEMPERATURE (°C)
6654 TA01b
6654fc
1
LT6654
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage V
IN
to GND ........................... –0.3V to 38V
Output Voltage V
OUT
.........................–0.3V to V
IN
+ 0.3V
Output Short-Circuit Duration ......................... Indefinite
Specified Temperature Range
H-Grade ............................................. –40°C to 125°C
MP-Grade .......................................... –55°C to 125°C
Operating Temperature Range................ –55°C to 125°C
Storage Temperature Range (Note 2)..... –65°C to 150°C
Lead Temperature (Soldering, 10 sec.)
(Note 9)................................................................. 300°C
PIN CONFIGURATION
TOP VIEW
V
IN
TOP VIEW
GND* 1
GND 2
DNC 3
6 V
OUT
5 DNC
4 V
IN
GND
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 192°C/W
DNC: CONNECTED INTERNALLY
DO NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
*CONNECT PIN TO DEVICE GND (PIN 2)
3
4
5
V
OUT
DNC
GND*
1
2
8
7
6
DNC
V
OUT
GND*
LS8 PACKAGE
8-PIN LEADLESS CHIP CARRIER (5mm
×
5mm)
T
JMAX
= 150°C,
θ
JA
= 125°C/W
DNC: CONNECTED INTERNALLY
DO NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
*CONNECT PIN TO DEVICE GND (PIN 3)
6654fc
2
LT6654
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
LT6654AHS6-1.25#TRMPBF
LT6654AHS6-1.25#TRPBF
LTFVD
6-Lead Plastic TSOT-23
LT6654BHS6-1.25#TRMPBF
LT6654BHS6-1.25#TRPBF
LTFVD
6-Lead Plastic TSOT-23
LT6654AMPS6-1.25#TRMPBF
LT6654AMPS6-1.25#TRPBF
LTFVD
6-Lead Plastic TSOT-23
LT6654BMPS6-1.25#TRMPBF
LT6654BMPS6-1.25#TRPBF
LTFVD
6-Lead Plastic TSOT-23
LT6654AHS6-2.048#TRMPBF
LT6654AHS6-2.048#TRPBF
LTFVF
6-Lead Plastic TSOT-23
LT6654BHS6-2.048#TRMPBF
LT6654BHS6-2.048#TRPBF
LTFVF
6-Lead Plastic TSOT-23
LT6654AMPS6-2.048#TRMPBF LT6654AMPS6-2.048#TRPBF LTFVF
6-Lead Plastic TSOT-23
LT6654BMPS6-2.048#TRMPBF LT6654BMPS6-2.048#TRPBF LTFVF
6-Lead Plastic TSOT-23
LT6654AHS6-2.5#TRMPBF
LT6654AHS6-2.5#TRPBF
LTFJY
6-Lead Plastic TSOT-23
LT6654BHS6-2.5#TRMPBF
LT6654BHS6-2.5#TRPBF
LTFJY
6-Lead Plastic TSOT-23
LT6654AMPS6-2.5#TRMPBF
LT6654AMPS6-2.5#TRPBF
LTFJY
6-Lead Plastic TSOT-23
LT6654BMPS6-2.5#TRMPBF
LT6654BMPS6-2.5#TRPBF
LTFJY
6-Lead Plastic TSOT-23
LT6654AHS6-3#TRMPBF
LT6654AHS6-3#TRPBF
LTFVG
6-Lead Plastic TSOT-23
LT6654BHS6-3#TRMPBF
LT6654BHS6-3#TRPBF
LTFVG
6-Lead Plastic TSOT-23
LT6654AMPS6-3#TRMPBF
LT6654AMPS6-3#TRPBF
LTFVG
6-Lead Plastic TSOT-23
LT6654BMPS6-3#TRMPBF
LT6654BMPS6-3#TRPBF
LTFVG
6-Lead Plastic TSOT-23
LT6654AHS6-3.3#TRMPBF
LT6654AHS6-3.3#TRPBF
LTFVH
6-Lead Plastic TSOT-23
LT6654BHS6-3.3#TRMPBF
LT6654BHS6-3.3#TRPBF
LTFVH
6-Lead Plastic TSOT-23
LT6654AMPS6-3.3#TRMPBF
LT6654AMPS6-3.3#TRPBF
LTFVH
6-Lead Plastic TSOT-23
LT6654BMPS6-3.3#TRMPBF
LT6654BMPS6-3.3#TRPBF
LTFVH
6-Lead Plastic TSOT-23
LT6654AHS6-4.096#TRMPBF
LT6654AHS6-4.096#TRPBF
LTFVJ
6-Lead Plastic TSOT-23
LT6654BHS6-4.096#TRMPBF
LT6654BHS6-4.096#TRPBF
LTFVJ
6-Lead Plastic TSOT-23
LT6654AMPS6-4.096#TRMPBF LT6654AMPS6-4.096#TRPBF LTFVJ
6-Lead Plastic TSOT-23
LT6654BMPS6-4.096#TRMPBF LT6654BMPS6-4.096#TRPBF LTFVJ
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
LT6654AHS6-5#TRMPBF
LT6654AHS6-5#TRPBF
LTFVK
6-Lead Plastic TSOT-23
LT6654BHS6-5#TRMPBF
LT6654BHS6-5#TRPBF
LTFVK
LT6654AMPS6-5#TRMPBF
LT6654AMPS6-5#TRPBF
LTFVK
6-Lead Plastic TSOT-23
LT6654BMPS6-5#TRMPBF
LT6654BMPS6-5#TRPBF
LTFVK
6-Lead Plastic TSOT-23
LEAD FREE FINISH
PART MARKING*
PACKAGE DESCRIPTION
†
665425
8-Lead Ceramic LCC (5mm
×
5mm)
LT6654AHLS8-2.5#PBF
665425
8-Lead Ceramic LCC (5mm
×
5mm)
LT6654BHLS8-2.5#PBF
†
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
†
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
SPECIFIED TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
SPECIFIED TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
6654fc
3
LT6654
AVAILABLE OPTIONS
INITIAL ACCURACY
TEMPERATURE COEFFICIENT
0.05%
10ppm/°C
0.1%
20ppm/°C
0.05%
10ppm/°C
0.1%
20ppm/°C
2.048V
0.05%
10ppm/°C
0.1%
20ppm/°C
0.05%
10ppm/°C
0.1%
20ppm/°C
10ppm/°C
2.5V
0.05%
10ppm/°C
0.05%
20ppm/°C
0.1%
20ppm/°C
0.1%
10ppm/°C
0.05%
20ppm/°C
0.1%
3V
0.05%
10ppm/°C
0.1%
20ppm/°C
0.05%
10ppm/°C
0.1%
20ppm/°C
3.3V
0.05%
10ppm/°C
0.1%
20ppm/°C
0.05%
10ppm/°C
0.1%
20ppm/°C
4.096V
0.05%
10ppm/°C
0.1%
20ppm/°C
0.05%
10ppm/°C
0.1%
20ppm/°C
10ppm/°C
5V
0.05%
0.1%
20ppm/°C
10ppm/°C
0.05%
0.1%
20ppm/°C
** See the Order Information section for complete part number listing.
OUTPUT VOLTAGE
1.25V
ORDER PART NUMBER**
LT6654AHS6-1.25
LT6654BHS6-1.25
LT6654AMPS6-1.25
LT6654BMPS6-1.25
LT6654AHS6-2.048
LT6654BHS6-2.048
LT6654AMPS6-2.048
LT6654BMPS6-2.048
LT6654AHS6-2.5
LT6654AHLS8-2.5
LT6654BHS6-2.5
LT6654BHLS8-2.5
LT6654AMPS6-2.5
LT6654BMPS6-2.5
LT6654AHS6-3
LT6654BHS6-3
LT6654AMPS6-3
LT6654BMPS6-3
LT6654AHS6-3.3
LT6654BHS6-3.3
LT6654AMPS6-3.3
LT6654BMPS6-3.3
LT6654AHS6-4.096
LT6654BHS6-4.096
LT6654AMPS6-4.096
LT6654BMPS6-4.096
LT6654AHS6-5
LT6654BHS6-5
LT6654AMPS6-5
LT6654BMPS6-5
SPECIFIED TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
6654fc
4
LT6654
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, C
L
= 1μF and V
IN
= V
OUT
+ 0.5V, unless otherwise noted.
For LT6654-1.25, V
IN
= 2.4V, unless otherwise noted.
PARAMETER
Output Voltage Accuracy
CONDITIONS
LT6654A
LT6654B
LT6654AH
LT6654BH
LT6654AMP
LT6654BMP
LT6654A
LT6654B
V
OUT
+ 0.5V ≤ V
IN
≤ 36V
LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
2.4V ≤ V
IN
≤ 36V
LT6654-1.25
Load Regulation (Note 4)
I
OUT(SOURCE)
= 10mA
LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
LT6654-1.25
LT6654LS8
Load Regulation (Note 4)
I
OUT(SINK)
= 10mA
LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
LT6654-1.25
LT6654LS8
Dropout Voltage (Note 5)
V
IN
– V
OUT
, ΔV
OUT
= 0.1%
I
OUT
= 0mA
LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
I
OUT(SOURCE)
= 10mA
I
OUT(SINK)
= –10mA
LT6654-1.25, ΔV
OUT
= 0.1%, I
OUT
= 0mA
LT6654-1.25, ΔV
OUT
= 0.1%, I
OUT
= ±10mA
Supply Current
Output Short-Circuit Current
Output Voltage Noise (Note 6)
No Load
Short V
OUT
to GND
Short V
OUT
to V
IN
0.1Hz ≤ f ≤ 10Hz
LT6654-1.25
LT6654-2.048
LT6654-2.5
LT6654-3
LT6654-3.3
LT6654-4.096
LT6654-5
10Hz ≤ f ≤ 1kHz
0.1% Settling, C
LOAD
= 1μF
MIN
–0.05
–0.10
–0.215
–0.43
–0.23
–0.46
3
10
1.2
1.2
TYP
MAX
0.05
0.10
0.215
0.43
0.23
0.46
10
20
5
10
5
10
8
15
15
20
30
45
20
30
25
30
60
90
100
120
450
50
1.5
1.6
1.8
2.4
600
40
30
0.8
1.0
1.5
1.6
1.7
2.0
2.2
2.0
150
UNITS
%
%
%
%
%
%
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
mV
mV
mV
mV
V
V
V
μA
μA
mA
mA
ppm
P-P
ppm
P-P
ppm
P-P
ppm
P-P
ppm
P-P
ppm
P-P
ppm
P-P
ppm
RMS
μs
ELECTRICAL CHARACTERISTICS
l
l
l
l
l
l
Output Voltage Temperature Coefficient (Note 3)
Line Regulation
l
l
l
l
l
3
6
10
l
l
l
9
15
30
l
l
l
l
l
l
55
Minimum Input Voltage
350
Turn-On Time
6654fc
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