Features
n
LTC2633
Dual 12-/10-/8-Bit I
2
C
V
OUT
DACs with
10ppm/°C Reference
Description
The LTC
®
2633 is a family of dual 12-, 10-, and 8-bit
voltage-output DACs with an integrated, high accuracy,
low drift reference in an 8-lead TSOT-23 package. It has
rail-to-rail output buffers and is guaranteed monotonic.
The LTC2633-L has a full-scale output of 2.5V, and operates
from a single 2.7V to 5.5V supply. The LTC2633-H has a
full-scale output of 4.096V, and operates from a 4.5V to
5.5V supply. Each DAC can also operate with an external
reference, which sets the full-scale output to the external
reference voltage.
These DACs communicate via a 2-wire I
2
C-compatible
serial interface. The LTC2633 operates in both the standard
mode (clock rate of 100kHz) and the fast mode (clock rate
of 400kHz). The LTC2633 incorporates a power-on reset
circuit. Options are available for reset to zero-scale, reset
to mid-scale in internal reference mode, reset to mid-scale
in external reference mode, or reset with all DAC outputs
in a high impedance state after power-up.
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. Protected by U.S. Patents including 5396245, 5859606, 6891433,
6937178, 7414561.
n
n
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n
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Integrated Precision Reference
2.5V Full-Scale 10ppm/°C (LTC2633-L)
4.096V Full-Scale 10ppm/°C (LTC2633-H)
Maximum INL Error: ±1LSB (LTC2633A-12)
Low Noise: 0.75mV
P-P
0.1Hz to 200kHz
Guaranteed Monotonic Over –40°C to 125°C
Temperature Range
Selectable Internal or External Reference
2.7V to 5.5V Supply Range (LTC2633-L)
Low Power: 0.4mA at 3V
Power-on-Reset to Zero-Scale/Mid-Scale/Hi-Z
Double-Buffered Data Latches
8-Lead ThinSOT™ Package
applications
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Mobile Communications
Process Control and Industrial Automation
Power Supply Margining
Portable Equipment
Automotive
Block Diagram
GND
INTERNAL
REFERENCE
SWITCH
V
REF
V
CC
REF
Integral Nonlinearity (LTC2633A-LZ12)
INL Curve
2
V
CC
= 3V
INTERNAL REF
.
REGISTER
REGISTER
REGISTER
V
OUTA
REGISTER
DAC A
DAC B
V
OUTB
INL (LSB)
SCL
1
0
POWER-ON
RESET
CONTROL
DECODE LOGIC
–1
CA0
I
2
C
ADDRESS
DECODE
–2
I
2
C INTERFACE
SDA
0
1024
2048
CODE
3072
4095
2633 TA01
2633 BD
2633fb
1
LTC2633
aBsolute maximum ratings
(Notes 1, 2)
pin conFiguration
Supply Voltage (V
CC
) ................................... –0.3V to 6V
SCL, SDA ..................................................... –0.3V to 6V
V
OUTA
, V
OUTB
....................–0.3V to Min(V
CC
+ 0.3V, 6V)
CA0 ...................................–0.3V to Min(V
CC
+ 0.3V, 6V)
REF ...................................–0.3V to Min(V
CC
+ 0.3V, 6V)
Operating Temperature Range
LTC2633C ................................................ 0°C to 70°C
LTC2633H (Note 3) ............................ –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
TOP VIEW
SCL
CA0
REF
GND
1
2
3
4
8
7
6
5
SDA
V
CC
V
OUTB
V
OUTA
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C (NOTE 6),
θ
JA
= 195°C/W
orDer inFormation
LTC2633
A
C
TS8
–L
Z
12
#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
I = Reset to Mid-Scale in Internal Reference Mode
X = Reset to Mid-Scale in External Reference Mode (2.5V Full-Scale
Voltage, Internal Reference Mode Option Only)
O = Reset to Mid-Scale in Internal Reference Mode, DACs High Z
(2.5V Full-Scale Voltage, Internal Reference Mode Option Only)
Z = Reset to Zero-Scale in Internal Reference Mode
FULL-SCALE VOLTAGE INTERNAL REFERENCE MODE
L = 2.5V
H = 4.096V
PACKAGE TYPE
TS8 = 8-Lead Plastic TSOT-23
TEMPERATURE GRADE
C = Commercial Temperature Range (0°C to 70°C)
H = Automotive Temperature Range (–40°C to 125°C)
ELECTRICAL GRADE (OPTIONAL)
A = ±1LSB 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/
2633fb
2
LTC2633
proDuct selection guiDe
PART NUMBER
LTC2633A-LI12
LTC2633A-LX12
LTC2633A-LZ12
LTC2633A-LO12*
LTC2633A-HI12
LTC2633A-HZ12
LTC2633-LI12
LTC2633-LI10
LTC2633-LI8
LTC2633-LX12
LTC2633-LX10
LTC2633-LX8
LTC2633-LZ12
LTC2633-LZ10
LTC2633-LZ8
LTC2633-LO12*
LTC2633-LO10*
LTC2633-LO8*
LTC2633-HI12
LTC2633-HI10
LTC2633-HI8
LTC2633-HZ12
LTC2633-HZ10
LTC2633-HZ8
PART
MARKING**
LTFTC
LTFTB
LTFSZ
LTFTV
LTFTF
LTFTD
LTFTC
LTFTJ
LTFTQ
LTFTB
LTFTH
LTFTP
LTFSZ
LTFTG
LTFTN
LTFTV
LTFTW
LTFTX
LTFTF
LTFTM
LTFTS
LTFTD
LTFTK
LTFTR
VFS WITH INTERNAL
REFERENCE
2.5V
•
(4095/4096)
2.5V
•
(4095/4096)
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)
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
Mid-Scale
Zero-Scale
High Impedance
Mid-Scale
Zero-Scale
Mid-Scale
Mid-Scale
Mid-Scale
Mid-Scale
Mid-Scale
Mid-Scale
Zero-Scale
Zero-Scale
Zero-Scale
High Impedance
High Impedance
High Impedance
Mid-Scale
Mid-Scale
Mid-Scale
Zero-Scale
Zero-Scale
Zero-Scale
POWER-ON
REFERENCE
MODE
Internal
External
Internal
Internal
Internal
Internal
Internal
Internal
Internal
External
External
External
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
RESOLUTION
12-Bit
12-Bit
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
12-Bit
10-Bit
8-Bit
12-Bit
10-Bit
8-Bit
V
CC
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
MAXIMUM
INL
±1LSB
±1LSB
±1LSB
±1LSB
±1LSB
±1LSB
±2.5LSB
±1LSB
±0.5LSB
±2.5LSB
±1LSB
±0.5LSB
±2.5LSB
±1LSB
±0.5LSB
±2.5LSB
±1LSB
±0.5LSB
±2.5LSB
±1LSB
±0.5LSB
±2.5LSB
±1LSB
±0.5LSB
* Contact Linear Technology for other Hi-Z options.
**The temperature grade is identified by a label on the shipping container.
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.
LTC2633-LI12/-LI10/-LI8/-LX12/-LX10/-LX8/-LZ12/-LZ10/-LZ8/-LO12/-LO10/-LO8/LTC2633A-LI12/-LX12/-LZ12/-LO12 (V
FS
= 2.5V)
LTC2633-8
SYMBOL PARAMETER
CONDITIONS
l
LTC2633-10
LTC2633-12
LTC2633A-12
UNITS
Bits
Bits
±1
±0.5
0.5
±0.5
±10
±0.2 ±0.8
±1
5
±5
LSB
LSB
mV
mV
µV/°C
%FSR
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
8
8
±0.5
±0.05 ±0.5
0.5
±0.5
±10
l
DC Performance
Resolution
Monotonicity
DNL
INL
ZSE
V
OS
V
OSTC
GE
Differential
Nonlinearity
Zero Scale Error
Offset Error
V
OS
Temperature
Coefficient
Gain Error
V
CC
= 3V, Internal Ref. (Note 4)
V
CC
= 3V, Internal Ref. (Note 4)
10
10
±0.5
±0.2
0.5
±0.5
±10
±0.2 ±0.8
±1
5
±5
±1
0.5
±0.5
±10
±0.2 ±0.8
12
12
±1
±2.5
5
±5
12
12
l
l
l
Integral Nonlinearity V
CC
= 3V, Internal Ref. (Note 4)
V
CC
= 3V, Internal Ref. (Note 5)
V
CC
= 3V, Internal Ref.
V
CC
= 3V, Internal Ref.
V
CC
= 3V, Internal Ref., Code = 0
l
l
5
±5
±0.2 ±0.8
2633fb
3
LTC2633
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.
LTC2633-LI12/-LI10/-LI8/-LX12/-LX10/-LX8/-LZ12/-LZ10/-LZ8/-LO12/-LO10/-LO8/LTC2633A-LI12/-LX12/-LZ12/-LO12 (V
FS
= 2.5V)
LTC2633-8
SYMBOL PARAMETER
GE
TC
Gain Temperature
Coefficient
Load Regulation
CONDITIONS
V
CC
= 3V, Internal Ref. (Note 10)
C-Grade
H-Grade
Internal Ref., Mid-Scale,
V
CC
= 3V ± 10%,
–5mA ≤ I
OUT
≤ 5mA
V
CC
= 5V ± 10%,
–10mA ≤ I
OUT
≤ 10mA
Internal Ref., Mid-Scale,
V
CC
= 3V ± 10%,
–5mA ≤ I
OUT
≤ 5mA
V
CC
= 5V ± 10%,
–10mA ≤ I
OUT
≤ 10mA
l
l
LTC2633-10
LTC2633-12
LTC2633A-12
UNITS
ppm/°C
ppm/°C
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
10
10
0.009 0.016
0.009 0.016
10
10
0.035 0.064
0.035 0.064
10
10
0.14 0.256
0.14 0.256
10
10
0.14 0.256 LSB/mA
0.14 0.256 LSB/mA
R
OUT
DC Output
Impedance
l
l
0.09 0.156
0.09 0.156
0.09 0.156
0.09 0.156
0.09 0.156
0.09 0.156
0.09 0.156
0.09 0.156
Ω
Ω
SYMBOL PARAMETER
V
OUT
PSR
I
SC
DAC I
SD
DAC Output Span
Power Supply Rejection
Short Circuit Output Current (Note 6)
Sinking
Sourcing
DAC Output Current in High Impedance
Mode
Positive Supply Voltage
Supply Current (Note 7)
CONDITIONS
External Reference
Internal Reference
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
LO Options Only
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l
l
MIN
TYP
0 to V
REF
0 to 2.5
–80
27
–28
0.01
MAX
UNITS
V
V
dB
48
–48
±0.5
mA
mA
µA
Power Supply
V
CC
I
CC
For Specified Performance
V
CC
= 3V, V
REF
= 2.5V, External Reference
V
CC
= 3V, Internal Reference
V
CC
= 5V V
REF
= 2.5V, External Reference
V
CC
= 5V, Internal Reference
V
CC
= 5V
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l
l
l
l
l
2.7
0.3
0.4
0.3
0.4
0.5
5.5
0.5
0.6
0.5
0.6
2
V
mA
mA
mA
mA
µA
I
SD
Supply Current in Power-Down Mode
(Note 7)
Input Voltage Range
Resistance
Capacitance
Reference Input
l
l
1
120
160
12
0.005
1.24
1.25
±10
0.5
10
V
CC
200
5
1.26
V
kΩ
pF
µA
V
ppm/°C
kΩ
µF
mA
I
REF
Reference Current, Power Down Mode
Output Voltage
Reference Temperature Coefficient
Output Impedance
Capacitive Load Driving
Short Circuit Current
DAC Powered Down
l
Reference Output
l
V
CC
= 5.5V, REF Shorted to GND
2.5
2633fb
4
LTC2633
electrical characteristics
SYMBOL PARAMETER
Digital I/O
V
IL
V
IH
V
IL(CA0)
V
IH(CA0)
R
INH
R
INL
R
INF
V
OL
t
OF
t
SP
I
IN
C
IN
C
B
C
CA0
Low Level Input Voltage
(SDA and SCL)
High Level Input Voltage
(SDA and SCL)
Low Level Input Voltage on CA0
High Level Input Voltage on CA0
Resistance from CA0
to V
CC
to Set CA0 = V
CC
Resistance from CA0
to GND to Set CA0 = GND
Resistance from CA0 to V
CC
or GND to
Set CA0 = Float
Low Level Output Voltage
Output Fall Time
Pulse Width of Spikes Suppressed by
Input Filter
Input Leakage
I/O Pin Capacitance
Capacitive Load for Each Bus Line
External Capacitive Load on Address Pin
CA0
Settling Time
V
CC
= 3V (Note 9)
±0.39% (±1LSB at 8 Bits)
±0.098% (±1LSB at 10 Bits)
±0.024% (±1LSB at 12 Bits)
0.1V
CC
≤ V
IN
≤ 0.9V
CC
(Note 8)
(Note 14)
(Note 11)
See Test Circuit 1
See Test Circuit 1
See Test Circuit 2
See Test Circuit 2
See Test Circuit 2
Sink Current = 3mA
V
O
= V
IH(MIN)
to V
O
= V
IL(MAX)
,
C
B
= 10pF to 400pF (Note 12)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
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.
LTC2633-LI12/-LI10/-LI8/-LX12/-LX10/-LX8/-LZ12/-LZ10/-LZ8/-LO12/-LO10/-LO8/LTC2633A-LI12/-LX12/-LZ12/-LO12 (V
FS
= 2.5V)
CONDITIONS
MIN
–0.5
0.7V
CC
0.15V
CC
0.85V
CC
10
10
2
0
20 + 0.1C
B
0
0.4
250
50
1
8
400
10
TYP
MAX
0.3V
CC
UNITS
V
V
V
V
kΩ
kΩ
MΩ
V
ns
ns
µA
pF
pF
pF
AC Performance
t
s
3.4
4.0
4.5
1.0
500
At Mid-Scale Transition
1 DAC Held at FS, 1 DAC Switch 0-FS
External Reference
At f = 1kHz, External Reference
At f = 10kHz, External Reference
At f = 1kHz, Internal Reference
At f = 10kHz, Internal Reference
0.1Hz to 10Hz, External Reference
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, External Reference
0.1Hz to 200kHz, Internal Reference
C
REF
= 0.1µF
2.8
5.2
320
180
160
200
180
30
35
680
730
µs
µs
µs
V/µs
pF
nV•s
nV•s
kHz
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
µV
P-P
µV
P-P
µV
P-P
µV
P-P
Voltage Output Slew Rate
Capacitive Load Driving
Glitch Impulse
DAC-to-DAC Crosstalk
Multiplying Bandwidth
e
n
Output Voltage Noise Density
Output Voltage Noise
2633fb
5
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