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LTC1454CS#PBF

P1-P3P4-P6P7-P9P10-P12
1
LTC1454/LTC1454L
Dual 12-Bit Rail-to-Rail
Micropower DACs
Daisy-Chained Control Outputs
Functional Block Diagram: Dual 12-Bit Rail-to-Rail DAC
X1/X2 B
X1/X2 A
D
IN
CLK
D
OUT
V
CC
POWER-ON
RESET
–
+
12-BIT
DAC A
12-BIT
DAC B
REFOUT
CS/LD
V
OUT B
REFHI B
REFHI A
REFLO GND
14
16
1
11
8
7
12
2
6
5
3
4
9, 15
LTC1454: 5V
LTC1454L: 3V TO 5V
LTC1454: 2.048V
LTC1454L: 1.22V
10
13
V
OUT A
–
+
CLR
1454 BD02
24-BIT
SHIFT
REG
AND
DAC
LATCH
µP
Differential Nonlinearity
vs Input Code
CODE
0
DNL ERROR (LSB)
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
1024
2048
2560
1454 G08
512 1536
3072
3584
4095
FEATURES
■
12-Bit Resolution
■
Buffered True Rail-to-Rail Voltage Output
■
5V Operation, I
CC
: 700µA Typ (LTC1454)
■
3V Operation, I
CC
: 450µA Typ (LTC1454L)
■
Built-In Reference: 2.048V (LTC1454)
1.220V (LTC1454L)
■
CLR Pin
■
Power-On Reset
■
16-Lead SO Package
■
3-Wire Cascadable Serial Interface
■
Maximum DNL Error: 0.5LSB
■
Low Cost
The LTC
®
1454/LTC1454L are complete single supply,
dual rail-to-rail voltage output, 12-bit digital-to-analog
converters (DACs) in a 16-lead SO package. They include
an output buffer amplifier with variable gain (×1 or ×2)
and an easy-to-use 3-wire cascadable serial interface.
The LTC1454 has an onboard reference of 2.048V and a
full-scale output of 4.095V in a ×2 gain configuration. It
operates from a single 4.5V to 5.5V supply.
The LTC1454L has an onboard 1.22V reference and a full-
scale output of 2.5V in a ×2 gain configuration. It operates
from a single 2.7V to 5.5V supply.
Low power supply current, excellent DNL and small size
allow these parts to be used in a host of applications where
size, DNL and single supply operation are important.
DESCRIPTION
U
APPLICATIONS
U
■
Digital Calibration
■
Industrial Process Control
■
Automatic Test Equipment
■
Cellular Telephones
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
U
2
LTC1454/LTC1454L
ABSOLUTE MAXIMUM RATINGS
W
WW
U
WU
U
PACKAGE
/
O
RDER I FOR ATIO
V
CC
to GND .............................................. –0.5V to 7.5V
Logic Inputs to GND ................................ –0.5V to 7.5V
V
OUT A
, V
OUT B
, X1/X2 A,
X1/X2 B ..................................... –0.5V to V
CC
+ 0.5V
REFHI A, REFHI B, REFLO ............. –0.5V to V
CC
+ 0.5V
Maximum Junction Temperature ..........................125°C
Operating Temperature Range
LTC1454C/LTC1454LC ............................ 0°C to 70°C
LTC1454I/LTC1454LI ........................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LTC1454CN
LTC1454IN
LTC1454CS
LTC1454IS
LTC1454LCN
LTC1454LIN
LTC1454LCS
LTC1454LIS
ORDER PART
NUMBER
T
JMAX
= 125°C, θ
JA
= 100°C/W (N)
T
JMAX
= 125°C, θ
JA
= 150°C/W (S)
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
V
CC
= 4.5V to 5.5V (LTC1454), 2.7V to 5.5V (LTC1454L), X1/X2 = REFLO = GND, REFHI = REFOUT, V
OUT
and REFOUT 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 ±2.0 ±4.0 LSB
(Note 1) ● ±2.5 ±4.5 LSB
V
OS
Offset Error T
A
= 25°C ±2.0 ±12 mV
● ±4.0 ±18 mV
V
OS
TC Offset Error Temperature ±15 µV/°C
Coefficient
V
FS
Full-Scale Voltage When Using Internal Reference, LTC1454, T
A
= 25°C 4.065 4.095 4.125 V
LTC1454 ● 4.045 4.095 4.145 V
When Using Internal Reference, LTC1454L, T
A
= 25°C 2.470 2.500 2.530 V
LTC1454L ● 2.460 2.500 2.540 V
V
FS
TC Full-Scale Voltage When Using Internal Reference ±24 ppm/°C
Temperature Coefficient
Reference
Reference Output Voltage LTC1454 ● 2.008 2.048 2.088 V
LTC1454L ● 1.195 1.220 1.245 V
Reference Output ±20 ppm/°C
Temperature Coefficient
Reference Line Regulation ● 0.7 ±2.0 LSB/V
Reference Load Regulation 0 ≤ I
OUT
≤ 100µA, LTC1454 ● 0.2 1.5 LSB
LTC1454L ● 0.6 3.0 LSB
Reference Input Range V
REFHI
≤ V
CC
– 1.5V V
CC
/2 V
Reference Input Resistance ● 15 24 40 kΩ
Reference Input Capacitance 15 pF
Short-Circuit Current REFOUT Shorted to GND ● 40 120 mA
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
N PACKAGE
16-LEAD PDIP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
X1/X2 B
CLR
CLK
D
IN
CS/LD
D
OUT
X1/X2 A
V
OUT A
V
OUT B
V
CC
REFHI B
GND
REFLO
REFHI A
REFOUT
V
CC
3
LTC1454/LTC1454L
ELECTRICAL CHARACTERISTICS
V
CC
= 4.5V to 5.5V (LTC1454), 2.7V to 5.5V (LTC1454L), X1/X2 = REFLO = GND, REFHI = REFOUT, V
OUT
and REFOUT unloaded,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
CC
Positive Supply Voltage For Specified Performance, LTC1454 ● 4.5 5.5 V
LTC1454L ● 2.7 5.5 V
I
CC
Supply Current 4.5V ≤ V
CC
≤ 5.5V (Note 4), LTC1454 ● 700 1250 µA
2.7V ≤ V
CC
≤ 5.5V (Note 4), LTC1454L ● 450 1100 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND ● 70 120 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
● 80 120 mA
Output Impedance to GND Input Code = 0 ● 40 Ω
AC Performance
Voltage Output Slew Rate (Note 2) ● 0.5 1.0 V/µs
Voltage Output Settling Time (Notes 2, 3) to ±0.5LSB 14 µs
Digital Feedthrough 0.3 nV•s
AC Feedthrough REFHI = 1kHz, 2V
P-P
, (Code: All 0s) –95 dB
SINAD Signal-to-Noise + Distortion REFHI = 1kHz, 2V
P-P
, (Code: All 1s) 85 dB
V
CC
= 5V (LTC1454), 3V (LTC1454L), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
LTC1454 LTC1454L
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Digital I/O
V
IH
Digital Input High Voltage ● 2.4 2.0 V
V
IL
Digital Input Low Voltage ● 0.8 0.6 V
V
OH
Digital Output High Voltage I
OUT
= –1mA ● V
CC
– 1.0 V
CC
– 0.7 V
V
OL
Digital Output Low Voltage I
OUT
= 1mA ● 0.4 0.4 V
I
LEAK
Digital Input Leakage V
IN
= GND to V
CC
● ±10 ±10 µA
C
IN
Digital Input Capacitance Guaranteed by Design ● 10 10 pF
Switching
t
1
D
IN
Valid to CLK Setup ● 40 60 ns
t
2
D
IN
Valid to CLK Hold ● 00ns
t
3
CLK High Time ● 40 60 ns
t
4
CLK Low Time ● 40 60 ns
t
5
CS/LD Pulse Width ● 50 80 ns
t
6
LSB CLK to CS/LD ● 40 60 ns
t7 CS/LD Low to CLK ● 20 30 ns
t
8
D
OUT
Output Delay C
LOAD
= 15pF ● 150 220 ns
t
9
CLK Low to CS/LD Low ● 20 30 ns
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 5kΩ 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
.
P1-P3P4-P6P7-P9P10-P12

LTC1454CS#PBF

Mfr. #:
Buy LTC1454CS#PBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC Dual 12-Bit Vout DAC
Lifecycle:
New from this manufacturer.
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