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LTC1450LCG#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1450/LTC1450L
Parallel Input, 12-Bit
Rail-to-Rail Micropower
DACs in SSOP
■
Guaranteed Monotonic
■
Buffered True Rail-to-Rail Voltage Output
■
12-Bit Resolution
■
3V Operation (LTC1450L) I
CC
: 250µA Typ
■
5V Operation (LTC1450) I
CC
: 400µA Typ
■
Parallel 12-Bit or 8 + 4-Bit Double Buffered
Digital Input
■
Internal Reference
■
Output Buffer Configurable to Gain of 1 or 2
■
Configurable as a Multiplying DAC
■
Internal Power-On Reset
■
Maximum DNL Error: 0.5LSB
The LTC
®
1450/LTC1450L are complete single supply, rail-
to-rail voltage output, 12-bit digital-to-analog converters
(DACs) in a 24-pin SSOP or PDIP package. They include an
output buffer amplifier, reference and a double buffered
parallel digital interface.
The LTC1450 operates from a 4.5V to 5.5V supply. The
output can be pin strapped for 4.095V or 2.048V full-scale.
It has a 2.048V internal reference.
The LTC1450L operates from a 2.7V to 5.5V supply. The
output can be pin strapped for 2.5V or 1.22V full-scale. It
has a 1.22V internal reference.
The LTC1450/LTC1450L offer true stand-alone perfor-
mance. In addition, the reference output, high and low
reference inputs and gain setting resistor are brought to
pins for maximum flexibility.
FEATURES
DESCRIPTION
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Digital Calibration
■
Industrial Process Control
■
Automatic Test Equipment
■
Arbitrary Function Generators
■
Battery-Powered Data Conversion Products
■
Feedback Control Loops and Gain Control
APPLICATIONS
U
TYPICAL APPLICATION
U
REFLOGND
LTC1450: 
0V TO 4.095V
LTC1450L: 
0V TO 2.5V
LTC1450: 5V
LTC1450L: 3V TO 5V
12-BIT
DAC
REFHI
REFOUT
X1/X2
LTC1450
LTC1450L
1450/50L TA01
V
OUT
V
CC
UPPER
4-BIT
INPUT
LATCH
D11 (MSB)
D8
D7
DATA IN FROM
MICROPROCESSOR
DATA BUS
FROM
MICROPROCESSOR
DECODE LOGIC
FROM 
SYSTEM RESET
D0 (LSB)
–
+
REFERENCE
LTC1450: 2.048V
LTC1450L: 1.22V
12-BIT
DAC
LATCH
POWER-ON
RESET
LDAC
CLR
WR
CSMSB
CSLSB
LOWER
8-BIT
INPUT
LATCH
CODE
0
DNL ERROR (LSB)
0.5
0.0
–0.5
1024 2048 2560
1450/50L TA02
512 1536 3072 3584
4095
Differential Nonlinearity
vs Input Code
2
LTC1450/LTC1450L
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
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
REFOUT, REFLO, REFHI, X1/X2 ..... –0.5V to V
CC
+ 0.5V
Maximum Junction Temperature .......................... 125°C
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
Consult factory for Military grade parts.
T
JMAX
= 125°C, θ
JA
= 95°C/ W (G)
T
JMAX
= 125°C, θ
JA
= 58°C/ W (N)
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) ● ±4.0 LSB
V
OS
Offset Error T
A
= 25°C ±12 mV
● ±18 mV
V
OS
TC Offset Error Temperature Coefficient ±15 µV/°C
V
FS
Full-Scale Voltage Using Internal Reference, LTC1450, T
A
= 25°C 4.065 4.095 4.125 V
Using Internal Reference, LTC1450 ● 4.045 4.095 4.145 V
External 2.048V Reference, LTC1450 ● 4.075 4.095 4.115 V
Using Internal Reference, LTC1450L, T
A
= 25°C 2.470 2.500 2.530 V
Using Internal Reference, LTC1450L ● 2.460 2.500 2.540 V
External 1.22V Reference, LTC1450L ● 2.480 2.500 2.520 V
V
FS
TC Full-Scale Voltage Temperature Coefficient Using Internal Reference, LTC1450 ±0.10 LSB/°C
Using External Reference, LTC1450/LTC1450L ±0.02 LSB/°C
Using Internal Reference, LTC1450L ±0.10 LSB/°C
Reference Output (REFOUT)
Reference Output Voltage LTC1450L ● 1.195 1.220 1.245 V
LTC1450 ● 2.008 2.048 2.088 V
Reference Output Temperature Coefficient ±0.08 LSB/°C
Reference Line Regulation ● 0.7 ±2LSB/V
Reference Load Regulation 0 ≤ I
OUT
≤ 100µA, LTC1450L ● 0.6 ± 3.0 LSB
LTC1450 ● 0.2 ±1.5 LSB
Short-Circuit Current REFOUT Shorted to GND ● 80 mA
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
G PACKAGE
24-LEAD PLASTIC SSOP
N PACKAGE
24-LEAD PLASTIC PDIP
24
23
22
21
20
19
18
17
16
15
14
13
WR
CSLSB
CSMSB
(LSB) D0
D1
D2
D3
D4
D5
D6
D7
D8
LDAC
CLR
X1/X2
V
OUT
V
CC
REFOUT
REFHI
REFLO
GND
D11(MSB)
D10
D9
LTC1450CG
LTC1450CN
LTC1450IG
LTC1450IN
LTC1450LCG
LTC1450LCN
LTC1450LIG
LTC1450LIN
V
CC
= 4.5V to 5.5V (LTC1450), 2.7V to 5.5V (LTC1450L), V
OUT
unloaded,
REFOUT = REFHI, REFLO = GND = X1/X2, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
3
LTC1450/LTC1450L
V
CC
= 4.5V to 5.5V (LTC1450), 2.7V to 5.5V (LTC1450L), V
OUT
unloaded,
REFOUT = REFHI, REFLO = GND = X1/X2, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Input (REFLO = GND)
REFHI Input Range V
REFHI
≤ V
CC
– 1.5V ● V
CC
/2 V
REFHI Input Resistance ● 81830 kΩ
REFHI Input Capacitance 15 pF
Power Supply
V
CC
Positive Supply Voltage For Specified Performance, LTC1450L ● 2.7 5.5 V
LTC1450 ● 4.5 5.5 V
I
CC
Supply Current 4.5V ≤ V
CC
≤ 5.5V (Note 4) LTC1450 ● 300 400 620 µA
2.7V ≤ V
CC
≤ 5.5V (Note 4) LTC1450L ● 150 250 500 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND ● 100 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
● 120 mA
Output Impedance to GND Input Code = 0 ● 40 120 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 LDAC = 1 5 (nV)(s)
AC Feedthrough REFHI = 1kHz, 2V
P–P
–95 dB
SINAD Signal-to-Noise + Distortion REFHI = 1kHz, 2V
P–P
(Code: All 1’s) 85 dB
Digital Inputs
V
IH
Digital Input High Voltage V
CC
= 3V, LTC1450L ● 2.2 V
V
CC
= 5V, LTC1450 ● 2.4 V
V
IL
Digital Input Low Voltage V
CC
= 3V, LTC1450L ● 0.8 V
V
CC
= 5V, LTC1450 ● 0.8 V
V
LTH
Logic Threshold Voltage LTC1450L V
CC
/2 V
I
LEAK
Digital Input Leakage V
CC
= 5V, V
IN
= GND to V
CC
● –10 10 µA
C
IN
Digital Input Capacitance Guaranteed by Design. Not Subject to Test ● 10 pF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1450LCG#PBF

Mfr. #:
Buy LTC1450LCG#PBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC 3V 12-Bit Vout Parallel Input DAC
Lifecycle:
New from this manufacturer.
Delivery:
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