LTC1458/LTC1458L
Quad 12-Bit Rail-to-Rail
Micropower DACs
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FEATURES
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DESCRIPTIO
The LTC®1458/LTC1458L are complete single supply,
quad rail-to-rail voltage output, 12-bit digital-to-analog
converters (DACs) in SO-28 and SSOP-28 packages. They
include an output buffer amplifier with variable gain (×1 or
× 2) and an easy-to-use 3-wire cascadable serial interface.
Quad 12-Bit DAC
Buffered True Rail-to-Rail Voltage Output
Maximum DNL Error: 0.5LSB
5V Operation, ICC: 1.1mA Typ (LTC1458)
3V Operation, ICC: 800µA Typ (LTC1458L)
Internal or External Reference Operation
Settling Time: 14µs to ±0.5LSB
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Power-On Reset and CLR Pin
SSOP-28 Package
3-Wire Cascadable Serial Interface with 250kHz
Update Rate
Low Cost
The LTC1458 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 dissipating
only 5.5mW (ICC = 1.1mA typ).
The LTC1458L has an onboard 1.22V reference and a fullscale output of 2.5V in a ×2 gain configuration. It operates
from a single supply of 2.7V to 5.5V dissipating 2.4mW.
Excellent DNL, low supply current and a wide range of
built-in functions allow these parts to be used in a host of
applications when flexibility, power and single supply
operation are important.
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APPLICATIO S
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Digital Calibration
Industrial Process Control
Automatic Test Equipment
Low Power Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Daisy-Chained Control Outputs
Functional Block Diagram: Quad 12-Bit Rail-to-Rail DAC
2.048V (LTC1458)
1.22V (LTC1458L)
FROM µP
REFOUT
CS/LD CLK
5V (LTC1458)
3V TO 5V (LTC1458L)
DIN
Differential Nonlinearity
vs Input Code
VCC
0.5
REFHI C
REFHI B
0.4
0.3
DAC C
X1/X2 C
DAC B
48-BIT
REFLO C
0.2
X1/X2 B
0.1
REFLO B
SHIFT REGISTER
AND
REFHI D
VOUT B
REFHI A
DAC REGISTER
DNL (LSB)
VOUT C
0
–0.1
–0.2
VOUT A
–0.3
X1/X2 D
X1/X2 A
–0.4
REFLO D
REFLO A
–0.5
VOUT D
DAC D
DAC A
0
CLR
DOUT
512 1024 1536 2048 2560 3072 3584 4095
CODE
1458 G09
1458 BD01
1
LTC1458/LTC1458L
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ABSOLUTE
RATI GS
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PACKAGE/ORDER I FOR ATIO
(Note 1)
VCC to GND .............................................. – 0.5V to 7.5V
Logic Inputs to GND ................................ – 0.5V to 7.5V
VOUT A , VOUT B, VOUT C, VOUT D,
X1/X2 A , X1/X2 B, X1/X2 C,
X1/X2 D ......................................... – 0.5V to VCC + 0.5V
REFHI A , REFHI B, REFHI C, REFHI D,
REFLO A , REFLO B, REFLO C,
REFLO D ........................................ – 0.5V to VCC + 0.5V
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range
LTC1458C/LTC1458LC ............................ 0°C to 70°C
LTC1458I/LTC1458LI ........................ – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
X1/X2 C
1
28 VCC
VOUT C
2
27 X1/X2 B
CS/LD
3
26 VOUT B
DIN
4
25 CLR
REFHI C
5
24 REFHI B
GND
6
23 GND
REFLO C
7
22 REFLO B
REFLO D
8
21 REFLO A
REFHI D
9
20 REFHI A
DOUT 10
CLK 11
19 REFOUT
18 NC
NC 12
VOUT D 13
X1/X2 D 14
17 VOUT A
16 X1/X2 A
15 VCC
G PACKAGE
28-LEAD PLASTIC SSOP
ORDER PART
NUMBER
LTC1458CG
LTC1458CSW
LTC1458LCG
LTC1458LCSW
LTC1458IG
LTC1458ISW
LTC1458LIG
LTC1458LISW
SW PACKAGE
28-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 100°C/W (G)
TJMAX = 125°C, θJA = 150°C/W (SW)
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = TMIN to TMAX. VCC = 4.5V to 5.5V (LTC1458), 2.7V to 5.5V (LTC1458L),
X1/X2 = REFLO = GND, REFHI = REFOUT, VOUT unloaded, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
±0.5
LSB
DAC
Resolution
●
12
Bits
DNL
Differential Nonlinearity
Guaranteed Monotonic (Note 2)
●
INL
Integral Nonlinearity
TA = 25°C
(Note 2)
●
±1.75
±2.25
±4.0
±4.5
LSB
LSB
●
±3.0
±6.0
±12
±18
mV
mV
VOS
Offset Error
VOSTC
Offset Error Temperature
Coefficient
VFS
Full-Scale Voltage
VFSTC
Full-Scale Voltage
Temperature Coefficient
TA = 25°C
±15
µV/°C
When Using Internal Reference, LTC1458, TA = 25°C
LTC1458
●
4.065
4.045
4.095
4.095
4.125
4.145
V
V
When Using Internal Reference, LTC1458L, TA = 25°C
LTC1458L
●
2.470
2.460
2.500
2.500
2.530
2.540
V
V
± 24
When Using Internal Reference
ppm/°C
Reference
Reference Output Voltage
LTC1458
LTC1458L
●
●
2.008
1.195
Reference Line Regulation
2
2.088
1.245
±20
Reference Output
Temperature Coefficient
Reference Load Regulation
0 ≤ IOUT ≤ 100µA, LTC1458
LTC1458L
Reference Input Range
VREFHI ≤ VCC – 1.5V
Reference Input Resistance
2.048
1.220
V
V
ppm/°C
●
0.7
±2.0
LSB/V
●
●
0.2
0.6
1.5
3.0
LSB
LSB
40
kΩ
VCC /2
●
15
24
V
LTC1458/LTC1458L
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = TMIN to TMAX. VCC = 4.5V to 5.5V (LTC1458), 2.7V to 5.5V (LTC1458L),
X1/X2 = REFLO = GND, REFHI = REFOUT, VOUT unloaded, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
Reference Input Capacitance
Short-Circuit Current
MAX
15
REFOUT Shorted to GND
●
45
UNITS
pF
120
mA
5.5
5.5
V
V
Power Supply
VCC
Positive Supply Voltage
For Specified Performance, LTC1458
LTC1458L
●
●
4.5
2.7
ICC
Supply Current
4.5V ≤ VCC ≤ 5.5V (Note 5) , LTC1458
2.7V ≤ VCC ≤ 5.5V (Note 5), LTC1458L
●
●
1100
800
2400
2000
µA
µA
Short-Circuit Current Low
VOUT Shorted to GND
●
60
120
mA
Short-Circuit Current High
VOUT Shorted to VCC
●
70
120
mA
Output Impedance to GND
Input Code = 0
●
40
160
Ω
Voltage Output Slew Rate
(Note 3)
●
Voltage Output Settling Time
(Notes 3, 4) to ±0.5LSB
Op Amp DC Performance
AC Performance
0.5
Digital Feedthrough
SINAD
1.0
V/µs
14
µs
0.3
nV • s
AC Feedthrough
REFHI = 1kHz, 2VP-P, (Code: All 0s)
– 95
dB
Signal-to-Noise + Distortion
REFHI = 1kHz, 2VP-P, (Code: All 1s)
85
dB
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at
TA = TMIN to TMAX. VCC = 5V (LTC1458), 3V (LTC1458L), unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
LTC1458
TYP
MAX
MIN
LTC1458L
TYP
MAX
UNITS
Digital I/O
VIH
Digital Input High Voltage
●
VIL
Digital Input Low Voltage
●
VOH
Digital Output High Voltage
IOUT = – 1mA
●
VOL
Digital Output Low Voltage
IOUT = 1mA
●
ILEAK
Digital Input Leakage
VIN = GND to VCC
CIN
Digital Input Capacitance
Guaranteed by Design,
Not Subject to Test
2.4
2.0
0.8
V
0.6
V
0.4
0.4
V
●
±10
±10
µA
●
10
10
pF
VCC – 1.0
VCC – 0.7
V
Switching
t1
DIN Valid to CLK Setup
●
40
60
ns
t2
DIN Valid to CLK Hold
●
0
0
ns
t3
CLK High Time
●
40
60
ns
t4
CLK Low Time
●
40
60
ns
t5
CS/LD Pulse Width
●
50
80
ns
t6
LSB CLK to CS/LD
●
40
60
ns
t7
CS/LD Low to CLK
●
20
t8
DOUT Output Delay
t9
CLK Low to CS/LD Low
CLOAD = 15pF
●
30
150
●
20
ns
220
30
ns
ns
3
LTC1458/LTC1458L
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a 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 VOS
for the part.
Note 5: Digital inputs at 0V or VCC.
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1458
Integral Nonlinearity (INL)
2.0
0.4
1.6
0.3
1.2
0.2
0.8
0.1
0
–0.1
–0.2
1.4
1.0
0
–0.4
–0.8
–1.2
–0.4
–1.6
512 1024 1536 2048 2560 3072 3584 4095
CODE
0
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
125°C
–55°C
400
300
4.5
4.0
4.0
3.5
3.5
3.0
2.5
1.5
1.0
100
0.5
0
5
10
15
20
25
OUTPUT SINK CURRENT (mA)
30
1458 G04
4
RL
2.0
200
0.1
10
15
20
LOAD CURRENT (mA)
REFLO = GND
X1/X2 = GND
DAC CODE = FFFH
0
10
100
1k
LOAD RESISTANCE (Ω)
10k
1458 G05A
25
30
Output Swing vs Load Resistance
4.5
OUTPUT SWING (V)
25°C
OUTPUT SWING (V)
OUTPUT PULL-DOWN VOLTAGE (mV)
REFLO = GND
900 X1/X2 = GND
700
5
1458 G03
Output Swing vs Load Resistance
1000
500
0
1458 G08
Minimum Output Voltage vs
Output Sink Current
600
0.6
0.2
1458 G09
800
0.8
0.4
–2.0
0
∆VOUT < 1LSB
REFLO = GND
X1/X2 = GND
CODE: ALL 1's
VOUT = 4.095V
1.2
0.4
–0.3
–0.5
Minimum Supply Headroom for
Full Output Swing vs Load Current
VCC – VOUT (V)
0.5
INL ERROR (LSB)
DNL (LSB)
LTC1458
Differential Nonlinearity (DNL)
REFLO = GND
X1/X2 = GND
DAC CODE = OOOH
3.0
VCC
2.5
RL
2.0
1.5
1.0
0.5
0
10
100
1k
LOAD RESISTANCE (Ω)
10k
1458 G06A
LTC1458/LTC1458L
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1458 Full-Scale Voltage vs
Temperature
OFFSET VOLTAGE (mV)
SFULL-SCALE VOLTAGE (V)
4.105
4.100
4.095
4.090
4.085
–25
5
35
65
TEMPERATURE (°C)
95
125
5
950
4
940
3
930
SUPPLY CURRENT (µA)
4.110
4.080
–55
LTC1458
Supply Current vs Temperature
LTC1458
Offset Voltage vs Temperature
2
1
0
–1
–2
910
900
880
870
–4
860
–25
35
65
5
TEMPERATURE (°C)
1458 G06
95
125
VCC = 5V
890
–3
–5
–55
VCC = 5.5V
920
850
–55
VCC = 4.5V
–25
35
65
5
TEMPERATURE (°C)
1458 G07
95
125
1458 G05
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PI FU CTIO S
X1/X2 C, X1/X2 D,X1/X2 A, X1/X2 B (Pins 1, 14, 16, 27):
The Input Pin that Sets the Gain for DAC C/D/A/B. When
grounded the gain will be 2, i.e., output full-scale will be
2 • REFHI. When connected to VOUT the gain will be 1, i.e.,
output full-scale will be equal to REFHI.
REFLO C, REFLO D, REFLO A, REFLO B, (Pins 7, 8, 21,
22): The Bottom of the DAC Resistor Ladders for the
DACs. These can be used to offset zero-scale above
ground. REFLO should be connected to ground when no
offset is required.
VOUT C, VOUT D, VOUT A, VOUT B (Pins 2, 13, 17, 26): The
Buffered DAC Outputs.
DOUT (Pin 10): The Output of the Shift Register which
Becomes Valid on the Rising Edge of the Serial Clock.
CS/LD (Pin 3): The Serial Interface Enable and Load
Control Input.
CLK (Pin 11): The Serial Interface Clock Input.
DIN (Pin 4): The Serial Data Input.
REFHI C, REFHI D, REFHI A, REFHI B,(Pins 5, 9, 20, 24):
The Inputs to the DAC Resistor Ladder for DAC C/D/A/B.
GND (Pins 6, 23): Ground.
VCC (Pins 15, 28): The Positive Supply Input. 4.5V ≤ VCC
≤ 5.5V (LTC1458), 2.7V ≤ VCC ≤ 5.5V (LTC1458L). Requires a 0.1µF bypass capacitor to ground.
REFOUT (Pin 19): The Output of the Internal Reference.
CLR (Pin 25): The Clear Pin. Clears all DACs to zero-scale
when pulled low.
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LTC1458/LTC1458L
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BLOCK DIAGRA
28 VCC
X1/X2 C 1
LD
LD
12-BIT
DAC C
REGISTER
12-BIT
DAC B
REGISTER
VOUT C
2
CS/LD
3
DIN
4
REFHI C
5
24 REFHI B
GND
6
23 GND
REFLO C
7
22 REFLO B
REFLO D
8
21 REFLO A
REFHI D
9
20 REFHI A
DAC C
DAC B
27 X1/X2 B
26 VOUT B
POWER-ON
RESET
25 CLR
48-BIT SHIFT REGISTER
LTC1458: 2.048V
LTC1458L: 1.22V
DOUT 10
CLK 11
18 NC
NC 12
VOUT D 13
19 REFOUT
17 VOUT A
DAC D
12-BIT
DAC D
REGISTER
12-BIT
DAC A
REGISTER
LD
LD
DAC A
X1/X2 D 14
16 X1/X2 A
15 VCC
REFHI
+
VOUT
–
REFLO
X1/X2
1458 BD
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LTC1458/LTC1458L
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TI I G DIAGRA
t9
CLK
DIN
t2
t6
B11 C
MSB
B0 D
LSB
t1
t4
B0 D
PREVIOUS WORD
t3
B11 A
MSB
B0 B
LSB
CS/LD
t5
t8
B11 A
PREVIOUS WORD
DOUT
t7
B10 A
PREVIOUS WORD
B0 B
PREVIOUS WORD
B11 C
PREVIOUS WORD
B0 D
PREVIOUS WORD
B11 A
CURRENT WORD
1458 TD
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DEFI ITIO S
Resolution (n): Resolution is defined as the number of
digital input bits, n. It defines the number of DAC output
states (2n) that divide the full-scale range. The resolution
does not imply linearity.
Full-Scale Voltage (VFS): This is the output of the DAC
when all bits are set to 1.
Voltage Offset Error (VOS): The theoretical voltage at the
output when the DAC is loaded with all zeros. The output
amplifier can have a true negative offset, but because the
part is operated from a single supply, the output cannot go
below zero. If the offset is negative, the output will remain
near 0V resulting in the transfer curve shown in Figure 1.
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
DAC CODE
1458 F01
Figure 1. Effect of Negative Offset
The offset of the part is measured at the code that corresponds to the maximum offset specification:
VOS = VOUT – [(Code)(VFS)/(2n – 1)]
Least Significant Bit (LSB): One LSB is the ideal voltage
difference between two successive codes.
LSB = (VFS – VOS)/(2n – 1) = (VFS – VOS)/4095
Nominal LSBs:
LTC1458
LTC1458L
LSB = 4.095V/4095 = 1mV
LSB = 2.5V/4095 = 0.610mV
Integral Nonlinearity (INL): End-point INL is the maximum deviation from a straight line passing through the
end-points of the DAC transfer curve. Because the part
operates from a single supply and the output cannot go
below zero, the linearity is measured between full scale
and the code corresponding to the maximum offset
specification. The INL error at a given input code is
calculated as follows:
INL = [VOUT – VOS – (VFS – VOS)(code/4095)]/LSB
VOUT = The output voltage of the DAC measured at
the given input code
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LTC1458/LTC1458L
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DEFI ITIO S
Differential Nonlinearity (DNL): DNL is the difference
between the measured change and the ideal 1LSB change
between any two adjacent codes. The DNL error between
any two codes is calculated as follows:
Digital Feedthrough: The glitch that appears at the analog
output caused by AC coupling from the digital inputs when
they change state. The area of the glitch is specified in
(nV)(sec).
DNL = (∆VOUT – LSB)/LSB
∆VOUT = The measured voltage difference between
two adjacent codes
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OPERATIO
Serial Interface
Reference
The data on the DIN input is loaded into the shift register
on the rising edge of the clock. Data is loaded as one 48-bit
word, DAC A first, then DAC B, DAC C and DAC D. The MSB
is loaded first for each DAC. The DAC registers load the
data from the shift register when CS/LD is pulled high. The
CLK is disabled internally when CS/LD is high. Note: CLK
must be low before CS/LD is pulled low to avoid an extra
internal clock pulse.
The LTC1458L has an internal reference of 1.22V with a full
scale of 2.5V (gain of 2 configuration). The LTC1458
includes an internal 2.048V reference, making 1LSB equal
to 1mV (gain of 2 configuration). When the buffer gain is
2, the external reference must be less than VCC /2 and be
capable of driving the 15k minimum DAC resistor ladder.
The external reference must always be less than
VCC – 1.5V. The reference output voltage noise spectral
density at 1kHz is 300nV/√Hz.
The buffered output of the 48-bit shift register is available
on the DOUT pin which swings from ground to VCC.
Multiple LTC1458/LTC1458Ls may be daisy-chained together by connecting the DOUT pin to the DIN pin of the next
chip, while the CLK and CS/LD signals remain common to
all chips in the daisy-chain. The serial data is clocked to all
of the chips, then the CS/LD signal is pulled high to update
all of them simultaneously.
8
Voltage Output
The rail-to-rail buffered output of the LTC1458 family can
source or sink 5mA when operating with a 5V supply over
the entire operating temperature range while pulling to
within 300mV of the positive supply voltage or ground.
The output swings to within a few millivolts of either
supply rail when unloaded and has an equivalent output
resistance of 40Ω when driving a load to the rails. The
output can drive 1000pF without going into oscillation.
The output voltage noise spectral density at 1kHz is
600nV/√Hz.
LTC1458/LTC1458L
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APPLICATIO S I FOR ATIO
Using Two DACs to Digitally Program the Full Scale
and Offset of a Third
≤ 2,500 for VCC = 5V, since DAC C is being operated in × 2
mode for full rail-to-rail output swing.
Figure 2 shows how to use one LTC1458 to make a 12-bit
DAC with a digitally programmable full scale and offset.
DAC A and DAC B are used to control the offset and full
scale of DAC C. DAC A is connected in a × 1 configuration
and controls the offset of DAC C by moving REFLO C above
ground. The minimum value to which this offset can be
programmed is 10mV. DAC B is connected in a × 2
configuration and controls the full scale of DAC C by
driving REFHI C. Note that the voltage at REFHI C must be
less than or equal to VCC/2, corresponding to DAC B’s code
The transfer characteristic is:
VOUTC = 2 • [DC • (2 • DB – DA) + DA] • REFOUT
where REFOUT = The Reference Output
DA = (DAC A Digital Code)/4096
This sets the offset.
DB = (DAC B Digital Code)/4096
This sets the full scale.
DC = (DAC C Digital Code)/4096
VCC
X1/X2 C
VOUT
VOUT C
X1/X2 B
CS/LD
VOUT B
CLR
DIN
REFHI B
REFHI C
GND
GND
REFLO C
500Ω
5V
0.1µF
LTC1458
LTC1458L
REFLO B
REFLO A
REFLO D
REFHI D
REFHI A
DOUT
REFOUT
NC
CLK
VOUT A
NC
X1/X2 A
VOUT D
VCC
X1/X2 D
1458 F02
Figure 2
9
LTC1458/LTC1458L
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
G Package
28-Lead Plastic SSOP (0.209)
(LTC DWG # 05-08-1640)
10.07 – 10.33*
(0.397 – 0.407)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
7.65 – 7.90
(0.301 – 0.311)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
5.20 – 5.38**
(0.205 – 0.212)
1.73 – 1.99
(0.068 – 0.078)
0° – 8°
0.13 – 0.22
(0.005 – 0.009)
0.55 – 0.95
(0.022 – 0.037)
NOTE: DIMENSIONS ARE IN MILLIMETERS
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.152mm (0.006") PER SIDE
**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.254mm (0.010") PER SIDE
10
0.65
(0.0256)
BSC
0.25 – 0.38
(0.010 – 0.015)
0.05 – 0.21
(0.002 – 0.008)
G28 SSOP 1098
LTC1458/LTC1458L
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
SW Package
28-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.697 – 0.712*
(17.70 – 18.08)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.291 – 0.299**
(7.391 – 7.595)
1
2
3
4
5
6
7
8
9
10
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
11
12
13
14
0.037 – 0.045
(0.940 – 1.143)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
0.050
(1.270)
BSC
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.014 – 0.019
(0.356 – 0.482)
TYP
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
0.004 – 0.012
(0.102 – 0.305)
S28 (WIDE) 1098
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC1458/LTC1458L
U
TYPICAL APPLICATIO
VCC
X1/X2 C
LTC1458: 0V TO 4.095V
LTC1458L: 0V TO 2.5V
µP
VOUT C
X1/X2 B
CS/LD
VOUT B
REFHI B
REFHI C
GND
GND
REFLO D
LTC1458
LTC1458L
REFLO B
REFLO A
REFHI D
REFHI A
DOUT
REFOUT
CLK
NC
LTC1458: 0V TO 4.095V
LTC1458L: 0V TO 2.5V
LTC1458: 0V TO 4.095V
LTC1458L: 0V TO 2.5V
CLR
DIN
REFLO C
0.1µF
LTC1458: 4.5V TO 5.5V
LTC1458L: 2.7V TO 5.5V
VOUT D
X1/X2 D
LTC1458: 2.048V
LTC1458L: 1.22V
NC
LTC1458: 0V TO 4.095V
LTC1458L: 0V TO 2.5V
VOUT A
X1/X2 A
VCC
1458 TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1257
Single 12-Bit VOUT DAC, Full Scale: 2.048V, VCC: 4.75V to 15.75V,
Reference Can Be Overdriven up to 12V, i.e., FSMAX = 12V
5V to 15V Single Supply, Complete VOUT DAC in
SO-8 Package
LTC1446/LTC1446L
Dual 12-Bit Rail-to-Rail Output DACs in SO-8 Package
LTC1446: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1446L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
LTC1450/LTC1450L
Single 12-Bit Rail-to-Rail Output DACs with Parallel Interface
LTC1450: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1450L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
LTC1451
Single Rail-to-Rail 12-Bit DAC, Full Scale: 4.095V, VCC: 4.5V to 5.5V
Low Power, Complete VOUT DAC in SO-8 Package
LTC1452
Single Rail-to-Rail 12-Bit VOUT Multiplying DAC, VCC: 2.7V to 5.5V
Low Power, Multiplying VOUT DAC with Rail-to-Rail
Buffer Amplifier in SO-8 Package
LTC1453
Single Rail-to-Rail 12-Bit VOUT DAC, Full Scale: 2.5V, VCC: 2.7V to 5.5V
3V, Low Power, Complete VOUT DAC in SO-8 Package
LTC1454/LTC1454L
Dual 12-Bit VOUT DACs in SO-16 Package with Added Functionality
LTC1454: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1454L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
LTC1456
Single Rail-to-Rail Output 12-Bit DAC with Clear Pin,
Full Scale: 4.095V, VCC: 4.5V to 5.5V
Low Power, Complete VOUT DAC in SO-8 Package
with Clear Pin
LTC1655/LTC1655L
Single 16-Bit VOUT DAC with Serial Interface in SO-8
VCC = 5V (3V), Low Power, Deglitched,
VOUT = 0V to 4.096V (0V to 2.5V)
LTC1661
Dual 10-Bit VOUT DAC in 8-Lead MSOP Package
VCC = 2.7V to 5.5V Micropower, Rail-to-Rail Output
LTC1662
Ultralow Power, Dual 10-Bit DAC in 8-Lead MSOP Package
1.5µA ICC per DAC, 2.7V to 5.5V Supply Range
LTC1664
Quad 10-Bit VOUT DAC in 16-Pin Narrow SSOP
Pin Compatible with the LTC1660, 2.7V to 5.5V
Supply Range
LTC1665/LTC1660
Octal 8/10-Bit VOUT DAC in 16-Pin Narrow SSOP
VCC = 2.7V to 5.5V, Micropower, Rail-to-Rail Output
12
Linear Technology Corporation
14588lfa LT/LCG 0700 2K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com
LINEAR TECHNOLOGY CORPORATION 1996
工商网监
湘ICP备2023018690号
