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LTC7541AKSW#PBF

P1-P3P4-P4
1
LTC7541A
Improved
Industry Standard CMOS
12-Bit Multiplying DAC
■
Improved Direct Replacement for AD7541A
and AD7541
■
4-Quadrant Multiplication
■
12-Bit End-Point Linearity:
±
0.5LSB DNL and INL
Over Temperature
■
All Grades Guaranteed Monotonic
■
Maximum Gain Error:
±
1LSB
■
Single 5V to 15V Supply
■
TTL and CMOS Logic Compatible
■
Reduced Sensitivity to Op Amp Offset
■
Low Power Consumption
■
Virtually Latch-Up Proof
■
Low Cost
The LTC
®
7541A is a 12-bit resolution multiplying digital-
to-analog converter (DAC).
Laser-trimmed thin-film resistors provide excellent abso-
lute accuracy. Precision matched resistors and CMOS
circuitry result in remarkable stability with temperature
and supply variations.
The LTC7541A is a superior pin compatible replacement
for the industry standard AD7541A/AD7541. Improve-
ments include better typical accuracy and stability and
reduced sensitivity to output amplifier offset. The LTC7541A
is also very resistant to latch-up.
In addition to 2-quadrant and 4-quadrant multiplying
configurations, the LTC7541A performs well in digitally
programmable gain and noninverting voltage output ap-
plications. Low cost, improved performance and versatil-
ity make the LTC7541A the best choice for many new
designs and for upgrading existing systems. Parts are
available in 18-pin PDIP and 18-pin SO Wide packages.
FEATURES
DESCRIPTION
U
■
Motion Control Systems
■
Microprocessor-Controlled Calibration
■
Automatic Test Equipment
■
Programmable Gain Amplifiers
■
Digitally Controlled Filters
APPLICATIONS
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
U
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
DIGITAL INPUT CODE
0
INTEGRAL NONLINEARITY (LSB)
4095
7541A TA02
1024
2048
3072
1.0
0.5
0
–0.5
–1.0
512 1536 2560
3584
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
Integral Nonlinearity Over Temperature
V
DD
V
REF
LTC7541A
R
FB
GND
3
4 TO 15
2
16
15V
V
IN
17
18
1
OUT 1
33pF
V
OUT
7541 TA01
OUT 2
–
+
0.1µF
LT
®
1097
DIGITAL INPUTS
2
LTC7541A
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
ELECTRICAL CHARACTERISTICS
V
DD
= 15V, V
REF
= 10V, OUT 1 = OUT 2 = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
V
DD
to GND............................................... –0.5V to 17V
V
REF
to GND.......................................................... ±25V
R
FB
to GND ........................................................... ±25V
Digital Inputs to GND.................. –0.5V to (V
DD
+ 0.5V)
OUT 1, OUT 2 to GND .................. –0.5V to (V
DD
+ 0.5V)
Power Dissipation............................................. 450mW
(Derate 6mW/°C Above 75°C)
Maximum Junction Temperature ......... –65°C to 125°C
Operating Temperature Range
Commercial (J, K Versions).................. 0°C to 70°C
Industrial (B Version) ...................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LTC7541ABN
LTC7541ABSW
LTC7541AJN
LTC7541AKN
LTC7541AJSW
LTC7541AKSW
ORDER PART
NUMBER
Consult factory for Military grade parts.
T
JMAX
= 150°C, θ
JA
= 100°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 130°C/ W (SW)
LTC7541AK/LTC7541AB
1
2
3
4
5
6
7
8
9
TOP VIEW
N PACKAGE
18-LEAD PDIP
SW PACKAGE
18-LEAD PLASTIC SO WIDE
18
17
16
15
14
13
12
11
10
OUT 1
OUT 2
GND
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
R
FB
V
REF
V
DD
BIT 12 (LSB)
BIT 11
BIT 10
BIT 9
BIT 8
BIT 7
LTC7541AJ
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Accuracy
Resolution ● 12 12 Bits
INL Integral Nonlinearity (Note 1)
● ±1 ±0.5 LSB
(Relative Accuracy)
DNL Differential Nonlinearity Guaranteed Monotonic, T
MIN
to T
MAX
● ±1 ±0.5 LSB
GE Gain Error (Note 2) T
A
= 25°C ±6 ±1 LSB
T
MIN
to T
MAX
● ±8 ±2 LSB
Gain Temperature Coefficient (Note 3) ● 15 15ppm/°C
I
LKG
Output Leakage Current (Note 4) T
A
= 25°C ±5 ±5nA
T
MIN
to T
MAX
● ±10 ±10 nA
PSRR Power Supply Rejection V
DD
= 15V ±5% ● ±0.002 ±0.002 %/%
Reference Input
R
REF
V
REF
Input Resistance ● 7 11 15 7 11 15 kΩ
V
REF
Input Resistance –100 –100 ppm/°C
Temperature Coefficient
3
LTC7541A
V
DD
= 15V, V
REF
= 10V, OUT 1 = OUT 2 = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: ±0.5LSB = ±0.012% of full scale.
Note 2: Using internal feedback resistor.
Note 3: Guaranteed by design, not subject to test.
Note 4: I
OUT1
with all digital inputs = 0V or I
OUT2
with all digital
inputs = V
DD
.
Note 5: OUT 1 load = 100Ω in parallel with 13pF.
Note 6: Measured from digital input change to 90% of final analog value.
Digital inputs = 0V to V
DD
or V
DD
to 0V.
Note 7: V
REF
= 0V. All digital inputs 0V to V
DD
or V
DD
to 0V. Measured
using LT1363 as output amplifier.
ELECTRICAL CHARACTERISTICS
BLOCK DIAGRAM
W
40k
10k
40k
20k
40k
20k
40k
20k
40k40k40k
DECODER
BIT 1
(MSB)
BIT 2GND
V
DD
V
REF
R
FB
BIT 3 BIT 4 BIT 12
(LSB)
OUT 1
OUT 2
7541 BD
TTL/DTL/CMOS COMPATIBLE DIGITAL INPUTS
• • • •
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
ALL GRADES
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
Power Supply
V
DD
Operating Supply Range ● 51516 V
I
DD
Suppy Current Digital Inputs = V
IH
or V
IL
● 2mA
Digital Inputs = 0V or V
DD
● 100 µA
Digital Inputs
V
IH
Digital Input High Voltage ● 2.4 V
V
IL
Digital Input Low Voltage ● 0.8 V
I
IN
Digital Input Current ● 0.001 ±1 µA
C
IN
Digital Input Capacitance (Note 3), V
IN
= 0V ● 8pF
AC Performance
Propagation Delay (Notes 5, 6) 100 ns
Digital-to-Analog Glitch Impulse (Notes 5, 7) 1000 nV-sec
Multiplying Feedthrough Error V
REF
= ±10V, 10kHz Sinewave 1.0 mV
P-P
Output Current Settling Time (Note 5), To 0.01% for Full-Scale Change 0.6 µs
C
OUT
Output Capacitance (Note 3) Digital Inputs = V
IH
C
OUT1
● 200 pF
C
OUT2
● 70 pF
Digital Inputs = V
IL
C
OUT1
● 70 pF
C
OUT2
● 200 pF
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LTC7541AKSW#PBF

Mfr. #:
Buy LTC7541AKSW#PBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC 12-Bit Parallel, MDAC
Lifecycle:
New from this manufacturer.
Delivery:
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