Micropower DACs. LTC1450 Datasheet


LTC1450 DACs. Datasheet pdf. Equivalent


Part Number

LTC1450

Description

Parallel Input 12-Bit Rail-to-Rail Micropower DACs

Manufacture

Linear Technology

Total Page 16 Pages
Datasheet
Download LTC1450 Datasheet


LTC1450
FEATURES
s Guaranteed Monotonic
s Buffered True Rail-to-Rail Voltage Output
s 12-Bit Resolution
s 3V Operation (LTC1450L) ICC: 250µA Typ
s 5V Operation (LTC1450) ICC: 400µA Typ
s Parallel 12-Bit or 8 + 4-Bit Double Buffered
Digital Input
s Internal Reference
s Output Buffer Configurable to Gain of 1 or 2
s Configurable as a Multiplying DAC
s Internal Power-On Reset
s Maximum DNL Error: 0.5LSB
U
APPLICATIONS
s Digital Calibration
s Industrial Process Control
s Automatic Test Equipment
s Arbitrary Function Generators
s Battery-Powered Data Conversion Products
s Feedback Control Loops and Gain Control
LTC1450/LTC1450L
Parallel Input, 12-Bit
Rail-to-Rail Micropower
DACs in SSOP
DESCRIPTION
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
LTC1450: 5V
LTC1450L: 3V TO 5V
D11 (MSB)
DATA IN FROM
MICROPROCESSOR
DATA BUS
D8
D7
UPPER
4-BIT
INPUT
LATCH
LOWER
8-BIT
INPUT
LATCH
12-BIT
DAC
LATCH
REFOUT
REFERENCE
LTC1450: 2.048V
LTC1450L: 1.22V
12-BIT
DAC
REFHI
VCC
+
VOUT
LTC1450:
0V TO 4.095V
LTC1450L:
0V TO 2.5V
FROM
MICROPROCESSOR
DECODE LOGIC
FROM
SYSTEM RESET
D0 (LSB)
CSMSB
WR
CSLSB
LDAC
CLR
POWER-ON
RESET
GND
REFLO X1/X2
LTC1450
LTC1450L
1450/50L TA01
Differential Nonlinearity
vs Input Code
0.5
0.0
–0.5
0 512 1024 1536 2048 2560 3072 3584 4095
CODE
1450/50L TA02
1

LTC1450
LTC1450/LTC1450L
ABSOLUTE MAXIMUM RATINGS
VCC to GND .............................................. – 0.5V to 7.5V
Logic Inputs to GND ................................ – 0.5V to 7.5V
VOUT .............................................. – 0.5V to VCC + 0.5V
REFOUT, REFLO, REFHI, X1/X2 ..... – 0.5V to VCC + 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
PACKAGE/ORDER INFORMATION
TOP VIEW
WR 1
CSLSB 2
CSMSB 3
(LSB) D0 4
D1 5
D2 6
D3 7
D4 8
D5 9
D6 10
D7 11
D8 12
24 LDAC
23 CLR
22 X1/X2
21 VOUT
20 VCC
19 REFOUT
18 REFHI
17 REFLO
16 GND
15 D11(MSB)
14 D10
13 D9
G PACKAGE
24-LEAD PLASTIC SSOP
N PACKAGE
24-LEAD PLASTIC PDIP
TJMAX = 125°C, θJA = 95°C/ W (G)
TJMAX = 125°C, θJA = 58°C/ W (N)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1450CG
LTC1450CN
LTC1450IG
LTC1450IN
LTC1450LCG
LTC1450LCN
LTC1450LIG
LTC1450LIN
ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V (LTC1450), 2.7V to 5.5V (LTC1450L), VOUT unloaded,
REFOUT = REFHI, REFLO = GND = X1/X2, TA = TMIN to TMAX, unless otherwise noted.
SYMBOL PARAMETER
DAC
Resolution
DNL Differential Nonlinearity
INL Integral Nonlinearity
VOS Offset Error
CONDITIONS
Guaranteed Monotonic (Note 1)
TA = 25°C
(Note 1)
TA = 25°C
VOS TC Offset Error Temperature Coefficient
VFS Full-Scale Voltage
VFS TC Full-Scale Voltage Temperature Coefficient
Reference Output (REFOUT)
Reference Output Voltage
Reference Output Temperature Coefficient
Reference Line Regulation
Reference Load Regulation
Short-Circuit Current
Using Internal Reference, LTC1450, TA = 25°C
Using Internal Reference, LTC1450
External 2.048V Reference, LTC1450
Using Internal Reference, LTC1450L, TA = 25°C
Using Internal Reference, LTC1450L
External 1.22V Reference, LTC1450L
Using Internal Reference, LTC1450
Using External Reference, LTC1450/LTC1450L
Using Internal Reference, LTC1450L
LTC1450L
LTC1450
0 IOUT 100µA, LTC1450L
LTC1450
REFOUT Shorted to GND
MIN TYP MAX UNITS
q 12
Bits
q ±0.5 LSB
±3.5 LSB
q ±4.0 LSB
±12 mV
q ±18 mV
±15 µV/°C
4.065 4.095 4.125
q 4.045 4.095 4.145
V
V
q 4.075 4.095 4.115
V
2.470 2.500 2.530
q 2.460 2.500 2.540
V
V
q 2.480 2.500 2.520
V
±0.10
±0.02
±0.10
LSB /°C
LSB /°C
LSB /°C
q 1.195 1.220 1.245
q 2.008 2.048 2.088
V
V
±0.08
LSB /°C
q 0.7 ±2 LSB/V
q
0.6 ± 3.0
LSB
q
0.2 ±1.5
LSB
q 80 mA
2


Features FEATURES s s s s s s LTC1450/LTC1450L P arallel Input, 12-Bit Rail-to-Rail Micr opower DACs in SSOP DESCRIPTION The LTC ®1450/LTC1450L are complete single sup ply, railto-rail voltage output, 12-bit digital-to-analog converters (DACs) in a 24-pin SSOP or PDIP package. They in clude an output buffer amplifier, refer ence and a double buffered parallel dig ital interface. The LTC1450 operates fr om a 4.5V to 5.5V supply. The output ca n be pin strapped for 4.095V or 2.048V full-scale. It has a 2.048V internal re ference. The LTC1450L operates from a 2 .7V to 5.5V supply. The output can be p in strapped for 2.5V or 1.22V full-scal e. It has a 1.22V internal reference. T he LTC1450/LTC1450L offer true stand-al one performance. In addition, the refer ence output, high and low reference inp uts and gain setting resistor are broug ht to pins for maximum flexibility. , L TC and LT are registered trademarks of Linear Technology Corporation. s s s s s U APPLICATIONS s s s s s s Guaranteed Monotonic Buffered Tr.
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