LTC1451
LTC1452/LTC1453
12-Bit Rail-to-Rail
Micropower DACs in SO-8
FEATURES
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
12-Bit Resolution
Buffered True Rail-to-Rail Voltage Output
3V Operation (LTC1453), I
CC
: 250µA Typ
5V Operation (LTC1451), I
CC
: 400µA Typ
3V to 5V Operation (LTC1452), I
CC
: 225µA Typ
Built-In Reference: 2.048V (LTC1451)
1.220V (LTC1453)
Multiplying Version (LTC1452)
Power-On Reset
SO-8 Package
3-Wire Cascadable Serial Interface
Maximum DNL Error: 0.5LSB
Schmitt Trigger on Clock Input Allows Direct
Optocoupler Interface
The LTC
®
1451/LTC1452/LTC1453 are complete single
supply, rail-to-rail voltage output 12-bit digital-to-analog
converters (DACs) in an SO-8 package. They include an
output buffer amplifier and an easy-to-use 3-wire
cascadable serial interface.
The LTC1451 has an onboard reference of 2.048V and a
full-scale output of 4.095V. It operates from a single 4.5V
to 5.5V supply.
The LTC1452 is a multiplying DAC with a full-scale output
of twice the reference input voltage. It operates from a
single supply of 2.7V to 5.5V.
The LTC1453 has an onboard 1.22V reference and a full-
scale output of 2.5V. It operates from a single supply of
2.7V to 5.5V.
The low power supply current makes the LTC1451 family
ideal for battery-powered applications. The space saving
8-pin SO package and operation with no external compo-
nents provide the smallest 12-bit DAC system available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Digital Calibration
Industrial Process Control
Automatic Test Equipment
Cellular Telephones
TYPICAL APPLICATIO
Daisy-Chained Control Outputs
5V
0.5
Differential Nonlinearity
vs Input Code
0.1µF
D
IN
µP
CLK
V
CC
LTC1451
V
OUT
CONTROL
OUTPUT 1
CS/LD
D
OUT
V
REF
GND
DNL ERROR (LSB)
0.0
0.1µF
D
IN
CLK
CS/LD
LTC1451
GND
1451/2/3 TA01
V
CC
V
OUT
CONTROL
OUTPUT 2
–0.5
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1451/2/3 TA02
D
OUT
V
REF
TO NEXT DAC
U
sn145123 145123fas
U
U
1
LTC1451
LTC1452/LTC1453
ABSOLUTE
AXI U
RATI GS
V
CC
to GND .............................................. – 0.5V to 7.5V
TTL Input Voltage .................................... – 0.5V to 7.5V
V
OUT
, D
OUT
.................................... – 0.5V to V
CC
+ 0.5V
REF ................................................ – 0.5V to V
CC
+ 0.5V
Maximum Junction Temperature ......... – 65°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CLK 1
D
IN
2
CS/LD 3
D
OUT
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
CC
V
OUT
REF
GND
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 100°C/W (N8)
T
JMAX
= 125°C,
θ
JA
= 150°C/W (S8)
Consult factory for Military grade parts.
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 4.5V to 5.5V (LTC1451), 2.7V to 5.5V (LTC1452/LTC1453),
internal or external reference (V
REF
≤
V
CC
/2), V
OUT
and REF unloaded, unless otherwise noted.
SYMBOL
DAC
Resolution
DNL
INL
V
OS
V
OS
TC
V
FS
Differential Nonlinearity
Integral Nonlinearity
Offset Error
Offset Error Temperature
Coefficient
Full-Scale Voltage
When Using Internal Reference, LTC1451, T
A
= 25°C
LTC1451
External 2.048V Reference, V
CC
= 5V, LTC1452
When Using Internal Reference, LTC1453, T
A
= 25°C
LTC1453
V
FS
TC
Full-Scale Voltage
Temperature Coefficient
When Using Internal Reference, LTC1451
When Using External 2.048V Reference, LTC1452
When Using Internal Reference, LTC1453
q
q
q
q
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
Guaranteed Monotonic (Note 2)
T
A
= 25°C
(Note 2)
T
A
= 25°C
2
U
U
W
W W
U
W
(Note 1)
Operating Temperature Range
Commercial ........................................... 0°C to 70°C
Industrial ......................................... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART NUMBER
LTC1451CN8
LTC1452CN8
LTC1453CN8
LTC1451IN8
LTC1452IN8
LTC1453IN8
LTC1451CS8
LTC1452CS8
LTC1453CS8
LTC1451IS8
LTC1452IS8
LTC1453IS8
S8 PART MARKING
1451
1452
1453
1451I
1452I
1453I
MIN
12
TYP
MAX
UNITS
Bits
q
q
q
±0.5
±3.5
±4
±12
±18
±15
4.065
4.045
4.075
2.470
2.460
4.095
4.095
4.095
2.500
2.500
±
0.10
±0.02
±0.10
4.125
4.145
4.115
2.530
2.540
LSB
LSB
LSB
mV
mV
µV/°C
V
V
V
V
V
LSB/°C
LSB/°C
LSB/°C
sn145123 145123fas
LTC1451
LTC1452/LTC1453
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 4.5V to 5.5V (LTC1451), 2.7V to 5.5V (LTC1452/LTC1453),
internal or external reference (V
REF
≤
V
CC
/2), V
OUT
and REF unloaded, unless otherwise noted.
SYMBOL
PARAMETER
Reference Output Voltage
Reference Output
Temperature Coefficient
Reference Line Regulation
Reference Load Regulation
Reference Input Range
Reference Input Resistance
Reference Input Capacitance
Short-Circuit Current
Power Supply
V
CC
Positive Supply Voltage
For Specified Performance, LTC1451
LTC1452
LTC1453
4.5V
≤
V
CC
≤
5.5V (Note 4), LTC1451
2.7V
≤
V
CC
≤
5.5V (Note 4), LTC1452
2.7V
≤
V
CC
≤
5.5V (Note 4), LTC1453
V
OUT
Shorted to GND
V
OUT
Shorted to V
CC
Input Code = 0
(Note 3)
(Notes 3, 4) to
±0.5LSB
REF = 1kHz, 2V
P-P
, LTC1452
REF = 1kHz, 2V
P-P
, (Code: All 1s) LTC1452
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
LTC1451
LTC1453
MIN
q
q
TYP
2.048
1.220
±0.08
0.7
0.2
0.6
MAX
2.088
1.245
UNITS
V
V
LSB/°C
Reference (LTC1451/LTC1453)
2.008
1.195
±
2
±
1.5
±3
V
CC
/2
30
80
LSB/V
LSB
LSB
V
kΩ
pF
mA
V
V
V
µA
µA
µA
mA
mA
Ω
V/µs
µs
nV • s
dB
dB
0
≤
I
OUT
≤
100µA, LTC1451
LTC1453
V
REF
≤
V
CC
– 1.5V
q
q
q
q
8
14
15
REF Shorted to GND
q
4.5
2.7
2.7
400
225
250
5.5
5.5
5.5
620
350
500
100
120
40
120
I
CC
Supply Current
Op Amp DC Performance
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
AC Performance
Voltage Output Slew Rate
Voltage Output Settling Time
Digital Feedthrough
AC Feedthrough
SINAD
Signal-to-Noise + Distortion
q
q
q
q
0.4
1.0
14
0.3
– 95
85
sn145123 145123fas
3
LTC1451
LTC1452/LTC1453
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V (LTC1451LTC1452), V
CC
= 3V (LTC1453).
SYMBOL
Digital I/O
V
IH
V
IL
V
OH
V
OL
I
LEAK
C
IN
Switching
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
D
IN
Valid to CLK Setup
D
IN
Valid to CLK Hold
CLK High Time
CLK Low Time
CS/LD Pulse Width
LSB CLK to CS/LD
CS/LD Low to CLK
D
OUT
Output Delay
CLK Low to CS/LD Low
C
LOAD
= 15pF
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
PARAMETER
Digital Input High Voltage
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input Leakage
Digital Input Capacitance
I
OUT
= – 1mA
I
OUT
= 1mA
V
IN
= GND to V
CC
CONDITIONS
LTC1451/LTC1452
MIN
TYP
MAX
q
q
q
q
q
q
MIN
2.0
LTC1453
TYP
MAX
UNITS
V
2.4
0.8
V
CC
– 1.0
0.4
±10
10
0.6
V
CC
– 0.7
0.4
±10
10
V
V
V
µA
pF
Guaranteed by Design
Not Subject to Test
40
0
40
40
50
40
20
150
20
60
0
60
60
80
60
30
220
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full scale).
Note 3:
Load is 5kΩ in parallel with 100pF.
Note 4:
DAC switched between all 1s and the code corresponding to V
OS
for the part, i.e., LTC1451: code 18; LTC1453: code 30.
Note 5:
Digital inputs at 0V or V
CC
.
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1451 Minimum Supply
Voltage vs Load Current
5.4
∆V
OUT
< 1LSB
MINIMUM SUPPLY VOLTAGE (V)
MINIMUM SUPPLY VOLTAGE (V)
5.2
5.0
4.8
4.6
4.4
4.2
4.0
0.0001 0.001
SUPPLY CURRENT (µA)
0.01
0.1
1
LOAD CURRENT (mA)
4
U W
10
1451/2/3 G01
LTC1453 Minimum Supply
Voltage vs Load Current
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
100
2.25
0.0001 0.001
0.01
0.1
1
LOAD CURRENT (mA)
10
100
∆V
OUT
< 1LSB
450
440
430
420
410
400
390
380
370
360
LTC1451
Supply Current vs Temperature
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5V
350
–55
–25
35
65
5
TEMPERATURE (°C)
95
125
1451/2/3 G02
1451/2/3 G03
sn145123 145123fas
LTC1451
LTC1452/LTC1453
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1451
Supply Current vs Logic Input
Voltage
1.15
1.05
ALL DIGITAL INPUTS
TIED TOGETHER
4.5
4.0
3.5
FULL SCALE
R
L
TIED TO GND
OUTPUT PULL-DOWN VOLTAGE (mV)
SUPPLY CURRENT (mA)
0.95
OUTPUT SWING (V)
0.85
0.75
0.65
0.55
0.45
0.35
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
LOGIC INPUT VOLTAGE (V)
1451/2/3 G04
LTC1451
Offset Voltage vs Temperature
900
800
OFFSET VOLTAGE (µV)
ERROR (LSB)
700
600
500
400
300
–55
DNL ERROR (LSB)
–25
35
65
5
TEMPERATURE (°C)
LTC1452
Total Harmonic Distortion + Noise
vs Frequency
TOTAL HARMONIC DISTORTION + NOISE (dB)
–40
–50
–60
V
CC
= 5V
V
IN
= 2V
P-P
V
OUT
= 4V
P-P
–70
–80
–90
–100
50 100
U W
95
1451/2/3 G07
LTC1451
Output Swing vs Load Resistance
1000
LTC1451
Pull-Down Voltage vs Output Sink
Current Capability
100
125°C
3.0
2.5
2.0
1.5
1.0
0.5
0
10
ZERO SCALE
R
L
TIED TO V
CC
100
1k
LOAD RESISTANCE (Ω)
10k
1451/2/3 G05
25°C
10
–55°C
V
CC
= 5V
1
0.1
0.0001 0.001 0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
100
1451/2/3 G06
LTC1451
Differential Nonlinearity (DNL)
0.5
2.0
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
–0.5
LTC1451
Integral Nonlinearity (INL)
0.0
V
CC
= 5V
INTERNAL REFERENCE
T
A
= 25°C
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1451/2/3 G09
125
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1451/2/3 TA02
–2.0
LTC1451
Broadband Output Noise
0.2LSB/DIV
10k
1k
FREQUENCY (Hz)
100k
1451/2/3 G08
5ms/DIV
CODE = FFFH
BW = 3Hz TO 1.4MHz
GAIN = 1000
1451/2/3 G10
sn145123 145123fas
5
