LT6658
Precision Dual Output, High Current,
Low Noise, Voltage Reference
FEATURES
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DESCRIPTION
The
LT
®
6658
is a family of precision dual output references
combining the performance of a precision voltage refer-
ence and a linear regulator that we call the Refulator™.
Both outputs are ideal for driving the reference inputs of
high resolution ADCs and DACs, even with heavy load-
ing, while simultaneously powering microcontrollers and
other circuitry. Both outputs have the same precision
specifications and track each other over temperature and
load. Each output can be configured with external resis-
tors 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 cur-
rent. A noise reduction pin is available to band-limit and
lower the total integrated noise.
Separate supply pins are provided for each output, provid-
ing an option to reduce power consumption and isolate
the buffer amplifiers. The outputs have excellent supply
rejection and are stable with 1µF to 50µF capacitors.
The LT6658 is available in a 16-lead MSOP and DFN with
an exposed pad for thermal management. Short circuit
and thermal protection help to prevent thermal overstress.
All registered trademarks and trademarks are the property of their respective owners.
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Dual Output Tracking Reference
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Each Output Configurable to 6V
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Output 1: 150mA Source/20mA Sink
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Output 2: 50mA Source/20mA Sink
Low Drift:
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A-Grade: 10ppm/°C Max
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B-Grade: 20ppm/°C Max
High Accuracy:
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A-Grade: ±0.05% Max
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B-Grade: ±0.1% Max
Low Noise: 1.5ppm
P-P
(0.1Hz to 10Hz)
Wide Operating Voltage Range to 36V
Load Regulation: 0.25µV/mA
AC PSRR: 96dB at 10kHz
Kelvin Sense Connection on Outputs
Thermal Shutdown
Separate Supply Pins for Each Output
Available Output Voltage Options: 1.2V, 1.8V, 2.5V, 3V,
3.3V, 5V. All Options are Adjustable
Available in Exposed Pad Package MSE16 and
4mm × 3mm DFN
APPLICATIONS
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Microcontroller or FPGA with ADC/DAC Applications
Data Acquisition Systems
Automotive Control and Monitoring
Precision Low Noise Regulators
Instrumentation and Process Control
TYPICAL APPLICATION
Precision Dual Output 2.5V Reference and Supply
V
IN1
V
IN2
V
IN
5V TO 36V
V
IN
OD
0.1µF
BYPASS
1µF
GND
LT6658-2.5
V
OUT1_F
V
OUT1_S
R
LOAD1
V
OUT1
2.5V
150mA
1µF
6658 TA01a
Output Voltage Temperature Drift Both Outputs
2.502
V
OUT2_S
R
LOAD2
1µF
OUTPUT VOLTAGE (V)
V
OUT2_F
V
OUT2
2.5V
50mA
2.501
2.500
2.499
I
LOAD1
= 150mA
V
OUT1
V
OUT2
0
25 50 75 100 125 150
TEMPERATURE (°C)
6658 TA01b
2.498
–50 –25
Rev. C
Document Feedback
For more information
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1
LT6658
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltages
V
IN
, V
IN1
, V
IN2
to GND............................ –0.3V to 38V
Input Voltages
OD
to GND ............................................. –0.3V to 38V
V
OUT1_S
, V
OUT2_S
, NR, BYPASS to GND .. –0.3V to 6V
Output Voltages
V
OUT1_F
, V
OUT2_F
to GND ......................... –0.3V to 6V
Input Current
BYPASS ........................................................... ±10mA
Output Short-Circuit Duration .......................... Indefinite
Specified Temperature Range
I-Grade.................................................–40°C to 85°C
H-Grade ............................................. –40°C to 125°C
Operating Junction Temperature Range . –55°C to 150°C
Storage Temperature Range (Note 2)..... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
(Note 3) ............................................................ 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
GND
GND
BYPASS
DNC
NR
GND
V
OUT2_S
V
OUT2_F
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DNC
NC
V
IN
V
OUT1_S
V
OUT1_F
V
IN1
V
IN2
OD
GND
GND
BYPASS
DNC
NR
GND
V
OUT2_S
V
OUT2_F
1
2
3
4
5
6
7
8
17
GND
16 DNC
15 NC
14 V
IN
13 V
OUT1_S
12 V
OUT1_F
11 V
IN1
10 V
IN2
9
OD
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JC
= 10°C/W,
θ
JA
= 35°C/W
DNC: CONNECTED INTERNALLY
DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
DE PACKAGE
16-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,θ
JC
= 5°C/W,
θ
JA
= 43°C/W
DNC: CONNECTED INTERNALLY
DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
Rev. C
2
For more information
www.analog.com
LT6658
ORDER INFORMATION
TUBE
LT6658AIMSE-1.2#PBF
LT6658BIMSE-1.2#PBF
LT6658AHMSE-1.2#PBF
LT6658BHMSE-1.2#PBF
LT6658AIMSE-1.8#PBF
LT6658BIMSE-1.8#PBF
LT6658AHMSE-1.8#PBF
LT6658BHMSE-1.8#PBF
LT6658AIMSE-2.5#PBF
LT6658BIMSE-2.5#PBF
LT6658AHMSE-2.5#PBF
LT6658BHMSE-2.5#PBF
LT6658AIMSE-3#PBF
LT6658BIMSE-3#PBF
LT6658AHMSE-3#PBF
LT6658BHMSE-3#PBF
LT6658AIMSE-3.3#PBF
LT6658BIMSE-3.3#PBF
LT6658AHMSE-3.3#PBF
LT6658BHMSE-3.3#PBF
LT6658AIMSE-5#PBF
LT6658BIMSE-5#PBF
LT6658AHMSE-5#PBF
LT6658BHMSE-5#PBF
LT6658AIDE-1.2#PBF
LT6658BIDE-1.2#PBF
LT6658AHDE-1.2#PBF
LT6658BHDE-1.2#PBF
LT6658AIDE-1.8#PBF
LT6658BIDE-1.8#PBF
LT6658AHDE-1.8#PBF
LT6658BHDE-1.8#PBF
LT6658AIDE-2.5#PBF
LT6658BIDE-2.5#PBF
LT6658AHDE-2.5#PBF
LT6658BHDE-2.5#PBF
LT6658AIDE-3#PBF
LT6658BIDE-3#PBF
LT6658AHDE-3#PBF
TAPE AND REEL
LT6658AIMSE-1.2#TRPBF
LT6658BIMSE-1.2#TRPBF
LT6658AHMSE-1.2#TRPBF
LT6658BHMSE-1.2#TRPBF
LT6658AIMSE-1.8#TRPBF
LT6658BIMSE-1.8#TRPBF
LT6658AHMSE-1.8#TRPBF
LT6658BHMSE-1.8#TRPBF
LT6658AIMSE-2.5#TRPBF
LT6658BIMSE-2.5#TRPBF
LT6658AHMSE-2.5#TRPBF
LT6658BHMSE-2.5#TRPBF
LT6658AIMSE-3#TRPBF
LT6658BIMSE-3#TRPBF
LT6658AHMSE-3#TRPBF
LT6658BHMSE-3#TRPBF
LT6658AIMSE-3.3#TRPBF
LT6658BIMSE-3.3#TRPBF
LT6658AHMSE-3.3#TRPBF
LT6658BHMSE-3.3#TRPBF
LT6658AIMSE-5#TRPBF
LT6658BIMSE-5#TRPBF
LT6658AHMSE-5#TRPBF
LT6658BHMSE-5#TRPBF
LT6658AIDE-1.2#TRPBF
LT6658BIDE-1.2#TRPBF
LT6658AHDE-1.2#TRPBF
LT6658BHDE-1.2#TRPBF
LT6658AIDE-1.8#TRPBF
LT6658BIDE-1.8#TRPBF
LT6658AHDE-1.8#TRPBF
LT6658BHDE-1.8#TRPBF
LT6658AIDE-2.5#TRPBF
LT6658BIDE-2.5#TRPBF
LT6658AHDE-2.5#TRPBF
LT6658BHDE-2.5#TRPBF
LT6658AIDE-3#TRPBF
LT6658BIDE-3#TRPBF
LT6658AHDE-3#TRPBF
PART MARKING* PACKAGE DESCRIPTION
665812
665812
665812
665812
665818
665818
665818
665818
665825
665825
665825
665825
66583
66583
66583
66583
665833
665833
665833
665833
66585
66585
66585
66585
65812
65812
65812
65812
65818
65818
65818
65818
65825
65825
65825
65825
66583
66583
66583
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
SPECIFIED JUNCTION
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
Rev. C
For more information
www.analog.com
3
LT6658
ORDER INFORMATION
TUBE
LT6658BHDE-3#PBF
LT6658AIDE-3.3#PBF
LT6658BIDE-3.3#PBF
LT6658AHDE-3.3#PBF
LT6658BHDE-3.3#PBF
LT6658AIDE-5#PBF
LT6658BIDE-5#PBF
LT6658AHDE-5#PBF
LT6658BHDE-5#PBF
TAPE AND REEL
LT6658BHDE-3#TRPBF
LT6658AIDE-3.3#TRPBF
LT6658BIDE-3.3#TRPBF
LT6658AHDE-3.3#TRPBF
LT6658BHDE-3.3#TRPBF
LT6658AIDE-5#TRPBF
LT6658BIDE-5#TRPBF
LT6658AHDE-5#TRPBF
LT6658BHDE-5#TRPBF
PART MARKING* PACKAGE DESCRIPTION
66583
65833
65833
65833
65833
66585
66585
66585
66585
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
16-Lead (4mm × 3mm) Plastic DFN
SPECIFIED JUNCTION
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
*The temperature grade is identified by a label on the shipping container.
Consult ADI Marketing for parts specified with wider operating temperature ranges. Parts ending with PBF are RoHS and WEEE compliant.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
AVAILABLE OPTIONS
OUTPUT VOLTAGE
1.200V
INITIAL ACCURACY
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
1.800V
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
TEMPERATURE
COEFFICIENT
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
ORDER PART NUMBER **
LT6658AIMSE-1.2
LT6658BIMSE-1.2
LT6658AHMSE-1.2
LT6658BHMSE-1.2
LT6658AIDE-1.2
LT6658BIDE-1.2
LT6658AHDE-1.2
LT6658BHDE-1.2
LT6658AIMSE-1.8
LT6658BIMSE-1.8
LT6658AHMSE-1.8
LT6658BHMSE-1.8
LT6658AIDE-1.8
LT6658BIDE-1.8
LT6658AHDE-1.8
LT6658BHDE-1.8
SPECIFIED JUNCTION
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
Rev. C
4
For more information
www.analog.com
LT6658
AVAILABLE OPTIONS
OUTPUT VOLTAGE
2.500V
INITIAL ACCURACY
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
3.000V
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
3.300V
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
5.000V
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
0.05%
0.1%
TEMPERATURE
COEFFICIENT
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C
ORDER PART NUMBER **
LT6658AIMSE-2.5
LT6658BIMSE-2.5
LT6658AHMSE-2.5
LT6658BHMSE-2.5
LT6658AIDE-2.5
LT6658BIDE-2.5
LT6658AHDE-2.5
LT6658BHDE-2.5
LT6658AIMSE-3
LT6658BIMSE-3
LT6658AHMSE-3
LT6658BHMSE-3
LT6658AIDE-3
LT6658BIDE-3
LT6658AHDE-3
LT6658BHDE-3
LT6658AIMSE-3.3
LT6658BIMSE-3.3
LT6658AHMSE-3.3
LT6658BHMSE-3.3
LT6658AIDE-3.3
LT6658BIDE-3.3
LT6658AHDE-3.3
LT6658BHDE-3.3
LT6658AIMSE-5
LT6658BIMSE-5
LT6658AHMSE-5
LT6658BHMSE-5
LT6658AIDE-5
LT6658BIDE-5
LT6658AHDE-5
LT6658BHDE-5
SPECIFIED JUNCTION
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
Rev. C
For more information
www.analog.com
5
