LTC1456IS8#PBF

1
LTC1456
12-Bit Rail-to-Rail
Micropower DAC
with Clear Input
Digital Calibration
Industrial Process Control
Automatic Test Equipment
Cellular Telephones
APPLICATIONS
U
TYPICAL APPLICATION
U
CODE
0
DNL ERROR (LSB)
0.5
0
0.5
1024 2048 2560
1456 TA02
512 1536 3072 3584
4095
Differential Nonlinearity
vs Input Code
Functional Block Diagram: 12-Bit Rail-to-Rail DAC with Clear Input
+
12-BIT
DAC
4.5V TO 5.5V
2.048V
GND
POWER-ON
RESET
TO
OTHER
DACS
12-BIT
SHIFT
REG
AND
DAC
LATCH
µP
D
IN
V
CC
2
8
D
OUT
4
5
1456 TA01
CLK1
CS/LD3
CLR6
7
RAIL-TO-RAIL
VOLTAGE
OUTPUT
V
OUT
FEATURES
SO-8 Package
12-Bit Resolution
Buffered True Rail-to-Rail Voltage Output
Asynchronous Clear Input
Built-In Reference
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Power-On Reset Clears DAC to 0V
3-Wire Cascadable Serial Interface
Maximum DNL Error: 0.5LSB
Low Cost
The LTC
®
1456 is a complete single supply, rail-to-rail
voltage output, 12-bit digital-to-analog converter (DAC) in
an SO-8 package. It includes a rail-to-rail output buffer
amplifier and an easy-to-use 3-wire cascadable serial
interface. The LTC1456 includes a CLR pin that asynchro-
nously clears the DAC to zero scale.
The LTC1456 has an internal 2.048V reference and a full-
scale output of 4.095V. It operates on a 4.5V to 5.5V
supply, dissipating 2.2mW.
The low power supply current and the space saving SO-8
package make the LTC1456 ideal for battery-powered
applications.
DESCRIPTION
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LTC1456
ABSOLUTE MAXIMUM RATINGS
W
WW
U
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
LTC1456CN8
LTC1456IN8
LTC1456CS8
LTC1456IS8
S8 PART MARKING
1456
1456I
V
CC
to GND ..............................................0.5V to 7.5V
Logic Inputs to GND ................................0.5V to 7.5V
V
OUT
..............................................0.5V to V
CC
+ 0.5V
Maximum Junction Temperature ......... 65°C to 125°C
Operating Temperature Range
LTC1456C ............................................ 0°C to 70°C
LTC1456I ........................................ 40°C to 85°C
Storage Temperature Range ................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Consult factory for Military grade parts.
T
JMAX
= 125°C, θ
JA
= 100°C/W (N8)
T
JMAX
= 125°C, θ
JA
= 150°C/W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
CLK
D
IN
CS/LD
D
OUT
V
CC
V
OUT
CLR
GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
ELECTRICAL CHARACTERISTICS
V
CC
= 4.5V to 5.5V, V
OUT
unloaded, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DAC
Resolution 12 Bits
DNL Differential Nonlinearity Guaranteed Monotonic (Note 1) ±0.5 LSB
INL Integral Nonlinearity T
A
= 25°C ±3.5 LSB
(Note 1)
±4 LSB
V
OS
Offset Error T
A
= 25°C ±12 mV
±18 mV
V
OS
TC Offset Error Temperature ±15 µV/°C
Coefficient
V
FS
Full-Scale Voltage T
A
= 25°C 4.065 4.095 4.125 V
4.045 4.095 4.145 V
V
FS
TC Full-Scale Voltage ±24 ppm/°C
Temperature Coefficient
Power Supply
V
CC
Positive Supply Voltage For Specified Performance 4.5 5.5 V
I
CC
Supply Current (Note 4) 430 650 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND 120 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
120 mA
Output Impedance to GND Input Code = 0 40 120
AC Performance
Voltage Output Slew Rate (Note 2) 0.4 1.0 V/µs
Voltage Output Settling Time (Notes 2, 3) to ±0.5LSB 14 µs
Digital Feedthrough 0.3 nVs
3
LTC1456
V
CC
= 4.5V to 5.5V, V
OUT
unloaded, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
The denotes specifications which apply over the full operating
temperature range.
Note 1: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full scale).
Note 2: Load is 5k in parallel with 100pF.
Note 3: DAC switched between all 1s and the code corresponding to V
OS
for the part.
Note 4: Digital inputs at 0V or V
CC
.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Digital I/O
V
IH
Digital Input High Voltage 2.4 V
V
IL
Digital Input Low Voltage 0.8 V
V
OH
Digital Output High Voltage I
OUT
= –1mA, D
OUT
Only V
CC
– 1.0 V
V
OL
Digital Output Low Voltage I
OUT
= 1mA, D
OUT
Only 0.4 V
I
LEAK
Digital Input Leakage V
CC
= 5V, V
IN
= GND to V
CC
±10 µA
C
IN
Digital Input Capacitance Guaranteed by Design. Not Subject to Test. 10 pF
Switching
t
1
D
IN
Valid to CLK Setup 40 ns
t
2
D
IN
Valid to CLK Hold 0ns
t
3
CLK High Time 40 ns
t
4
CLK Low Time 40 ns
t
5
CS/LD Pulse Width 50 ns
t
6
LSB CLK to CS/LD 40 ns
t
7
CS/LD Low to CLK 20 ns
t
8
D
OUT
Output Delay C
LOAD
= 15pF, V
CC
= 5V 150 ns
t
9
CLK Low to CS/LD Low 20 ns
t
10
CLR Pulse Width 65 ns

LTC1456IS8#PBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC Single 12-Bit Vout DAC w/Clear
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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