Features
n
LTC2630
Single 12-/10-/8-Bit
Rail-to- Rail DACs with 10ppm/°C
Reference in SC70
Description
The
LTC
®
2630
is a family of 12-, 10-, and 8-bit voltage-
output DACs with an integrated, high-accuracy, low-drift
reference in a 6-lead SC70 package. It has a rail-to-rail
output buffer and is guaranteed monotonic.
The LTC2630-L has a full-scale output of 2.5V, and
operates from a single 2.7V to 5.5V supply. The
LTC2630-H has a full-scale output of 4.096V, and oper-
ates from a 4.5V to 5.5V supply. Each DAC can also oper-
ate in supply as reference mode, which sets the full-scale
output to the supply voltage.
The parts use a simple SPI/MICROWIRE™ compatible
3-wire serial interface which operates at clock rates up
to 50MHz.
The LTC2630 incorporates a power-on reset circuit.
Options are available for reset to zero or reset to mid-
scale after power-up.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners. Protected by U.S.
Patents, including 5396245, 5859606, 6891433, 6937178 and 7414561.
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Integrated Precision Reference
2.5V Full Scale 10ppm/°C (LTC2630-L)
4.096V Full Scale 10ppm/°C (LTC2630-H)
Maximum INL Error: 1 LSB (LTC2630A-12)
Low Noise: 0.7mV
P-P
, 0.1Hz to 200kHz
Guaranteed Monotonic over Temperature
Selectable Internal Reference or Supply as Reference
2.7V to 5.5V Supply Range (LTC2630-L)
Low Power Operation: 180µA at 3V
Power Down to 1.8µA Maximum (C and I Grades)
Power-on Reset to Zero or Mid-Scale Options
SPI Serial Interface
Double-Buffered Data Latches
Tiny 6-Lead SC70 Package
applications
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Mobile Communications
Process Control and Industrial Automation
Automatic Test Equipment
Portable Equipment
Automotive
Block Diagram
V
CC
INTERNAL
REFERENCE
SDI
CONTROL
DECODE LOGIC
SCK
24-BIT
SHIFT
REGISTER
DACREF
CS/LD
INPUT
REGISTER
DAC
REGISTER
DAC
V
OUT
–1.0
GND
2630 BD
Integral Nonlinearity (LTC2630A-LZ12)
1.0
V
CC
= 3V
V
FS
= 2.5V
RESISTOR
DIVIDER
INL (LSB)
0.5
0
–0.5
0
1024
2048
CODE
3072
4095
2630 TA03
2630fg
For more information
www.linear.com/LTC2630
1
LTC2630
aBsolute maximum ratings
(Notes 1, 2)
pin conFiguration
TOP VIEW
CS/LD
1
SCK 2
SDI 3
6 V
OUT
5 GND
4 V
CC
Supply Voltage (V
CC
) ................................... –0.3V to 6V
CS/LD,
SCK, SDI .......................................... –0.3V to 6V
V
OUT
..................................–0.3V to min(V
CC
+ 0.3V, 6V)
Operating Temperature Range
LTC2630C ................................................ 0°C to 70°C
LTC2630I .............................................–40°C to 85°C
LTC2630H .......................................... –40°C to 125°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
SC6 PACKAGE
6-LEAD PLASTIC SC70
T
JMAX
= 150°C (Note 5),
θ
JA
= 300°C/W
orDer inFormation
LTC2630 A
C
SC6 –L
M
12
http://www.linear.com/product/LTC2630#orderinfo
#TRM PBF
LEAD FREE DESIGNATOR
TAPE AND REEL
TR = 2,500-Piece Tape and Reel
TRM = 500-Piece Tape and Reel
RESOLUTION
12 = 12-Bit
10 = 10-Bit
8 = 8-Bit
POWER-ON RESET
M = Reset to Mid-Scale
Z = Reset to Zero-Scale
FULL-SCALE VOLTAGE, INTERNAL REFERENCE MODE
L = 2.5V
H = 4.096V
PACKAGE TYPE
SC6 = 6-Lead SC70
TEMPERATURE GRADE
C = Commercial Temperature Range (0°C to 70°C)
I = Industrial Temperature Range (–40°C to 85°C)
H = Automotive Temperature Range (–40°C to 125°C)
ELECTRICAL GRADE (OPTIONAL)
A = ±1 LSB Maximum INL (12-Bit)
PRODUCT PART NUMBER
Consult LTC Marketing for information on non-standard 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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
2630fg
For more information
www.linear.com/LTC2630
LTC2630
proDuct selection guiDe
PART NUMBER
LTC2630A-LM12
LTC2630A-LZ12
LTC2630A-HM12
LTC2630A-HZ12
LTC2630-LM12
LTC2630-LM10
LTC2630-LM8
LTC2630-LZ12
LTC2630-LZ10
LTC2630-LZ8
LTC2630-HM12
LTC2630-HM10
LTC2630-HM8
LTC2630-HZ12
LTC2630-HZ10
LTC2630-HZ8
PART MARKING* V
FS
WITH INTERNAL REFERENCE
LCZB
LCSB
LCWR
LCZC
LCZB
LCZF
LCYW
LCSB
LCZD
LCYV
LCWR
LCZH
LCYY
LCZC
LCZG
LCYX
2.5V
•
(4095/4096)
2.5V
•
(4095/4096)
4.096V
•
(4095/4096)
4.096V
•
(4095/4096)
2.5V
•
(4095/4096)
2.5V
•
(1023/1024)
2.5V
•
(255/256)
2.5V
•
(4095/4096)
2.5V
•
(1023/1024)
2.5V
•
(255/256)
4.096V
•
(4095/4096)
4.096V
•
(1023/1024)
4.096V
•
(255/256)
4.096V
•
(4095/4096)
4.096V
•
(1023/1024)
4.096V
•
(255/256)
POWER-ON RESET TO CODE
Mid-Scale
Zero
Mid-Scale
Zero
Mid-Scale
Mid-Scale
Mid-Scale
Zero
Zero
Zero
Mid-Scale
Mid-Scale
Mid-Scale
Zero
Zero
Zero
RESOLUTION
12-Bit
12-Bit
12-Bit
12-Bit
12-Bit
10-Bit
8-Bit
12-Bit
10-Bit
8-Bit
12-Bit
10-Bit
8-Bit
12-Bit
10-Bit
8-Bit
V
CC
2.7V–5.5V
2.7V–5.5V
4.5V–5.5V
4.5V–5.5V
2.7V–5.5V
2.7V–5.5V
2.7V–5.5V
2.7V–5.5V
2.7V–5.5V
2.7V–5.5V
4.5V–5.5V
4.5V–5.5V
4.5V–5.5V
4.5V–5.5V
4.5V–5.5V
4.5V–5.5V
MAXIMUM INL
±1LSB
±1LSB
±1LSB
±1LSB
±2LSB
±1LSB
±0.5LSB
±2LSB
±1LSB
±0.5LSB
±2LSB
±1LSB
±0.5LSB
±2LSB
±1LSB
±0.5LSB
*The temperature grade is identified by a label on the shipping container.
2630fg
For more information
www.linear.com/LTC2630
3
LTC2630
electrical characteristics
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specified.
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2630A-LM12/-LZ12 (V
FS
= 2.5V)
LTC2630-8
SYMBOL PARAMETER
DC Performance
Resolution
Monotonicity
DNL
INL
ZSE
V
OS
V
OSTC
FSE
V
FSTC
Differential
Nonlinearity
Zero Scale Error
Offset Error
V
OS
Temperature
Coefficient
Full Scale Error
Full Scale Voltage
Temperature
Coefficient
Load Regulation
V
CC
= 3V, Internal Ref. (Note 3)
V
CC
= 3V, Internal Ref. (Note 3)
l
l
l
l
l
l
LTC2630-10
LTC2630-12
LTC2630A-12
UNITS
Bits
Bits
±1
±0.5
0.5
±0.5
±10
±0.2 ±0.8
±10
±10
±10
±1
5
±5
LSB
LSB
mV
mV
µV/°C
%FSR
ppm/°C
ppm/°C
ppm/°C
CONDITIONS
MIN TYP
8
8
MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
10
10
±0.5
±0.5
±0.2
0.5
±0.5
±10
±0.2 ±0.8
±10
±10
±10
0.03 0.064
0.03 0.064
0.08 0.156
0.08 0.156
MIN
±1
5
±5
±1
0.5
±0.5
±10
±0.2 ±0.8
±10
±10
±10
0.13 0.256
0.13 0.256
0.08 0.156
0.08 0.156
TYP
0V to V
CC
0V to 2.5
–80
l
l
12
12
±1
±2
5
±5
12
12
Integral Nonlinearity V
CC
= 3V, Internal Ref. (Note 3)
V
CC
= 3V, Internal Ref., Code = 0
V
CC
= 3V, Internal Ref. (Note 4)
V
CC
= 3V, Internal Ref. (Note 4)
V
CC
= 3V, Internal Ref.
V
CC
= 3V, Internal Ref. (Note 9)
C-Grade
I-Grade
H-Grade
±0.05 ±0.5
0.5
±0.5
±10
5
±5
l
±0.2 ±0.8
±10
±10
±10
0.008 0.016
0.008 0.016
0.08 0.156
0.08 0.156
Internal Ref., Mid-Scale,
V
CC
= 3V ±10%, –5mA ≤ I
OUT
≤ 5mA
l
V
CC
= 5V ±10%, –10mA ≤ I
OUT
≤ 10mA
l
Internal Ref., Mid-Scale,
V
CC
= 3V ±10%, –5mA ≤ I
OUT
≤ 5mA
l
V
CC
= 5V ±10%, –10mA ≤ I
OUT
≤ 10mA
l
CONDITIONS
Supply as Reference
Internal Reference
0.13 0.256 LSB/mA
0.13 0.256 LSB/mA
0.08 0.156
0.08 0.156
MAX
Ω
Ω
UNITS
V
V
dB
50
–50
5.5
mA
mA
V
µA
µA
µA
µA
µA
µA
V
V
0.8
0.6
±1
2.5
V
V
µA
pF
2630fg
R
OUT
DC Output
Impedance
SYMBOL PARAMETER
V
OUT
PSR
I
SC
DAC Output Span
Power Supply Rejection
Short Circuit Output Current (Note 5)
Sinking
Sourcing
Power Supply Voltage
Supply Current (Note 6)
V
CC
= 3V ±10% or 5V ±10%
V
FS
= V
CC
= 5.5V
Zero Scale; V
OUT
Shorted to V
CC
Full Scale; V
OUT
Shorted to GND
For Specified Performance
V
CC
= 3V, Supply as Reference
V
CC
= 3V, Internal Reference
V
CC
= 5V, Supply as Reference
V
CC
= 5V, Internal Reference
V
CC
= 5V, C-Grade, I-Grade
V
CC
= 5V, H-Grade
V
CC
= 3.6V to 5.5V
V
CC
= 2.7V to 3.6V
V
CC
= 4.5V to 5.5V
V
CC
= 2.7V to 4.5V
V
IN
= GND to V
CC
(Note 7)
27
–28
2.7
160
180
180
190
0.36
0.36
2.4
2.0
Power Supply
V
CC
I
CC
l
l
l
l
l
l
l
220
240
250
260
1.8
5
I
SD
Supply Current in Power-Down Mode
(Note 6)
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Leakage
Digital Input Capacitance
Digital I/O
V
IH
V
IL
I
LK
C
IN
l
l
l
l
l
l
4
For more information
www.linear.com/LTC2630
LTC2630
electrical characteristics
SYMBOL PARAMETER
AC Performance
t
S
Settling Time
V
CC
= 3V (Note 8)
±0.39% (±1LSB at 8 Bits)
±0.098% (±1LSB at 10 Bits)
±0.024% (±1LSB at 12 Bits)
3.2
3.9
4.4
1.0
500
At Mid-Scale Transition
At f = 1kHz, Supply as Reference
At f = 10kHz, Supply as Reference
At f = 1kHz, Internal Reference
At f = 10kHz, Internal Reference
0.1Hz to 10Hz, Supply as Reference
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, Supply as Reference
0.1Hz to 200kHz, Internal Reference
2
140
130
160
150
20
20
650
700
µs
µs
µs
V/µs
pF
nV•s
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specified.
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2630A-LM12/-LZ12 (V
FS
= 2.5V)
CONDITIONS
MIN
TYP
MAX
UNITS
Voltage Output Slew Rate
Capacitive Load Driving
Glitch Impulse
e
n
Output Voltage Noise Density
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
µV
P-P
µV
P-P
µV
P-P
µV
P-P
Output Voltage Noise
timing characteristics
SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
10
PARAMETER
SDI Valid to SCK Setup
SDI Valid to SCK Hold
SCK High Time
SCK Low Time
CS/LD Pulse width
SCK High to CS/LD High
CS/LD Low to SCK High
CS/LD High to SCK Positive Edge
SCK Frequency
The
l
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V. (See Figure 1) (Note 7).
LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2630A-LM12/-LZ12 (V
FS
= 2.5V)
CONDITIONS
l
l
l
l
l
l
l
l
MIN
4
4
9
9
10
7
7
7
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
50% Duty Cycle
l
50
MHz
2630fg
For more information
www.linear.com/LTC2630
5
嵌入式系统
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