LINER LTC7543 Improved industry standard serial 12-bit multiplying dac Datasheet

LTC7543/LTC8143
Improved Industry Standard
Serial 12-Bit Multiplying DACs
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DESCRIPTION
FEATURES
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The LTC® 7543/LTC8143 are serial-input 12-bit multiplying digital-to-analog converters (DACs). They are superior
pin compatible replacements for the AD7543 and
DAC-8143. Improvements include better accuracy, better
stability over temperature and supply variations, lower
sensitivity to output amplifier offset, tighter timing specifications and lower output capacitance.
Improved Direct Replacement for AD7543
and DAC-8143
Low Cost
DNL and INL Over Temperature: ±0.5LSB
Easy, Fast and Flexible Serial Interface
Daisy-Chain 3-Wire Interface for Multiple DAC
Systems (LTC8143)
1LSB Maximum Gain Error Over Temperature
Eliminates Adjustment
Asynchronous Clear Input for Initialization
Four-Quadrant Multiplication
Low Power Consumption
16-Pin PDIP and SO Packages
An easy-to-use serial interface includes an asynchronous
CLEAR input for systems requiring initialization to a known
state. The LTC8143 has a serial data output to allow daisychaining multiple DACs on a 3-wire interface bus.
These DACs are extremely versatile. They can be used for
2-quadrant and 4-quadrant multiplying, programmable
gain and single supply applications, such as noninverting
voltage output and biased or offset ground mode.
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APPLICATIONS
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Process Control and Industrial Automation
Remote Microprocessor-Controlled Systems
Digitally Controlled Filters and Power Supplies
Programmable Gain Amplifiers
Automatic Test Equipment
Parts are available in 16-pin PDIP and SO packages and
are specified over the extended industrial temperature
range, – 40°C to 85°C.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Multiplying DAC Has Easy 3-Wire Serial Interface
Integral Nonlinearity Over Temperature
VIN
1.0
CLOCK
DATA
LOAD
4
7
5
14
15
16
RFB
VDD VREF
1
OUT 1
STB1
LTC7543
SRI
LTC8143
LD1
OUT 2
2
DGND
AGND
12
3
33pF
–
LT ®1097
+
VOUT
7543/8143 TA01
INTEGRAL NONLINEARITY (LSB)
5V
0.5
TA = 85°C
TA = 25°C
0
TA = –40°C
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7543/8143 TA02
1
LTC7543/LTC8143
U
W
U
U
W W
W
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
VDD to AGND .............................................. – 0.5V to 7V
VDD to DGND .............................................. – 0.5V to 7V
AGND to DGND ............................................ VDD + 0.5V
DGND to AGND ............................................ VDD + 0.5V
Digital Inputs to DGND ............... – 0.5V to (VDD + 0.5V)
VOUT1, VOUT2 to AGND ................. – 0.5V to (VDD + 0.5V)
VREF to AGND, DGND............................................ ±25V
VRFB to AGND, DGND ........................................... ±25V
Maximum Junction Temperature .......................... 150°C
Operating Temperature Range ............... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
TOP VIEW
OUT 1
1
16 RFB
OUT 2
2
15 VREF
AGND
3
14 VDD
STB1
4
13 CLR
LD1
NC (LTC7543)
SRO (LTC8143)
SRI
5
12 DGND
6
11 STB4
7
10 STB3
STB2
8
9
LTC7543GKN
LTC7543KN
LTC7543GKSW
LTC7543KSW
LTC8143EN
LTC8143FN
LTC8143ESW
LTC8143FSW
LD2
N PACKAGE
16-LEAD PDIP
SW PACKAGE
16-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 100°C/ W (N)
TJMAX = 150°C, θJA = 130°C/ W (SW)
Consult factory for Military grade parts.
ACCURACY CHARACTERISTICS – LTC7543
VDD = 5V, VREF = 10V, VOUT1 = VOUT2 = AGND = DGND =0V, TA = TMIN to TMAX, unless otherwise specified.
SYMBOL PARAMETER
LTC7543GK
MIN TYP
MAX
CONDITIONS
Resolution
INL
Integral Nonlinearity
(Relative Accuracy)
●
(Note 1)
DNL
Differential Nonlinearity
Guaranteed Monotonic, TMIN to TMAX
GE
Gain Error
(Note 2)
ILKG
Gain Temperature Coefficient
(∆Gain/∆Temp)
(Note 3)
Output Leakage Current
(Note 4)
Zero-Scale Error
PSRR
2
Power Supply Rejection Ratio VDD = 5V ±5%
TA = 25°C
TMIN to TMAX
12
MIN
LTC7543K
TYP
MAX
12
UNITS
Bits
●
±0.5
±0.5
●
±0.5
±0.5
LSB
●
±1
±1
±2
±2
LSB
LSB
5
ppm/°C
●
1
5
1
LSB
TA = 25°C
TMIN to TMAX
●
±1
±10
±1
±10
nA
nA
TA = 25°C
TMIN to TMAX
●
±0.006
±0.06
±0.006
±0.06
LSB
LSB
●
±0.0001 ±0.002
±0.0001 ±0.002
%/%
LTC7543/LTC8143
ACCURACY CHARACTERISTICS – LTC8143
VDD = 5V, VREF = 10V, VOUT1 = VOUT2 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
Resolution
●
LTC8143E
TYP
MAX
12
MIN
LTC8143F
TYP
MAX
12
UNITS
Bits
INL
Integral Nonlinearity
(Relative Accuracy)
(Note 1)
●
±0.5
±1
LSB
DNL
Differential Nonlinearity
Guaranteed Monotonic, TMIN to TMAX
●
±0.5
±1
LSB
GE
Gain Error
(Note 2)
●
±1
±2
±2
±2
LSB
LSB
5
ppm/°C
ILKG
Gain Temperature Coefficient
(∆Gain/∆Temp)
(Note 3)
Output Leakage Current
(Note 4)
TA = 25°C
TMIN to TMAX
●
Zero-Scale Error
PSRR
1
5
1
TA = 25°C
TMIN to TMAX
●
±5
±25
±5
±25
nA
nA
TA = 25°C
TMIN to TMAX
●
±0.03
±0.15
±0.03
±0.15
LSB
LSB
●
±0.0001 ±0.002
±0.0001 ±0.002
%/%
Power Supply Rejection Ratio VDD = 5V ±5%
ELECTRICAL CHARACTERISTICS – LTC7543/LTC8143
VDD = 5V, VREF = 10V, VOUT1 = VOUT2 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise specified.
SYMBOL PARAMETER
LTC7543/LTC8143
ALL GRADES
MIN
TYP
MAX
CONDITIONS
UNITS
Reference Input
RREF
VREF Input Resistance
(Note 5)
●
Output Current Settling Time
(Notes 6, 7)
Multiplying Feedthrough Error
Digital-to-Analog Glitch Energy
8
11
15
kΩ
●
0.25
1
µs
VREF = ±10V, 10kHz Sinewave
●
0.8
2
mVP-P
(Notes 6, 8)
●
2
20
nV-sec
Total Harmonic Distortion
(Note 9)
●
– 108
– 92
dB
Output Noise Voltage Density
(Note 10)
●
13
nV/√Hz
AC Performance (Note 3)
THD
Analog Outputs (Note 3)
COUT
Output Capacitance
DAC Register Loaded to All 1s
COUT1
COUT2
●
●
60
20
90
60
pF
pF
DAC Register Loaded to All 0s
COUT1
COUT2
●
●
30
50
60
90
pF
pF
Digital Inputs
VIH
Digital Input High Voltage
VIL
Digital Input Low Voltage
IIN
Digital Input Current
VIN = 0V to VDD
●
CIN
Digital Input Capacitance
(Note 3), VIN = 0V
●
●
2.4
V
●
0.001
0.8
V
±1
µA
8
pF
Digital Outputs: SRO (LTC8143 Only)
VOH
Digital Output High
IOH = – 200µA
●
VOL
Digital Output Low
IOL = 1.6mA
●
4
V
0.4
V
3
LTC7543/LTC8143
ELECTRICAL CHARACTERISTICS – LTC7543/LTC8143
VDD = 5V, VREF = 10V, VOUT1 = VOUT2 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise specified.
SYMBOL
PARAMETER
LTC7543/LTC8143
ALL GRADES
MIN
TYP
MAX
CONDITIONS
UNITS
Timing Characteristics (Note 3)
tDS1
tDS2
Serial Input to Strobe Setup Time
(tSTB = 80ns)
STB1 Used as the Strobe
●
50
5
ns
STB2 Used as the Strobe
●
20
–5
ns
tDS3
STB3 Used as the Strobe
●
0
– 30
ns
tDS4
STB4 Used as the Strobe
●
0
– 30
ns
STB1 Used as the Strobe
●
30
10
ns
tDH1
tDH2
Serial Input to Strobe Hold Time
(tSTB = 80ns)
STB2 Used as the Strobe
●
50
25
ns
tDH3
STB3 Used as the Strobe
●
80
55
ns
tDH4
STB4 Used as the Strobe
●
80
55
ns
●
80
ns
tSRI
Serial Input Data Pulse Width
tSTB1, tSTB2, Strobe Pulse Width
tSTB3, tSTB4
(Note 11)
●
80
ns
tSTB1, tSTB2, Strobe Pulse Width
tSTB3, tSTB4
(Note 12)
●
80
ns
tLD1, tLD2
Load Pulse Width
●
140
ns
tASB
LSB Strobed into Input Register
to Load DAC Register Time
●
0
ns
tCLR
Clear Pulse Width
●
80
ns
SRO Timing Characteristics (LTC8143 Only)
tPD
STB2, STB3, STB4 Strobe to SRO
Propagation Delay
CL = 50pF
●
220
120
ns
tPD1
STB1 to SRO Propagation Delay
CL = 50pF
●
150
80
ns
●
4.75
5
Power Supply
VDD
Supply Voltage
IDD
Supply Current
Digital Inputs = 0V or VDD
Digital Inputs = VIH or VIL
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: IOUT1 with DAC register loaded with all 0s or IOUT2 with DAC
register loaded with all 1s.
Note 5: Typical temperature coefficient is 100ppm/°C.
Note 6: OUT 1 load = 100Ω in parallel with 13pF.
Note 7: To 0.01% for a full-scale change, measured from falling edge of
LD1 or LD2.
4
●
●
5.25
V
0.1
2
mA
mA
Note 8: VREF = 0V. DAC register contents changed from all 0s to all 1s or
from all 1s to all 0s.
Note 9: VREF = 6VRMS at 1kHz. DAC register loaded with all 1s.
Note 10: Calculation from en = √4KTRB where: K = Boltzmann constant
(J/K°); R = resistance (Ω); T = resistor temperature (°K); B = bandwidth
(Hz).
Note 11: Minimum high time for STB1, STB2, STB4. Minimum low time
for STB3.
Note 12. Minimum low time for STB1, STB2, STB4. Minimum high time
for STB3.
LTC7543/LTC8143
W
BLOCK DIAGRAM
20k
20k
20k
VREF 15
16 RFB
40k
40k
40k
40k
40k
40k
40k
10k
1 OUT 1
2 OUT 2
VDD 14
3 AGND
DECODER
CLR 13
BIT 1
(MSB)
CLR
LD1 5
BIT 2
BIT 3
BIT 4
BIT 12
(LSB)
DAC REGISTER
LOAD
LD2 9
STB1 4
CLK
STB2 8
INPUT 12-BIT SHIFT REGISTER
7 SRI
IN
OUT
STB3 10
STB4 11
6 SRO
7543/8143 BD
LTC8143 ONLY
DGND 12
WU
W
TI I G DIAGRA
tDH1
tDH2
tDH3
tDH4
tDS1
tDS2
tDS3
tDS4
tSTB1
tSTB2
tSTB3
tSTB4
STROBE INPUT
STB1, STB2, STB4
(INVERT FOR STB3)
tSTB1
tSTB2
tSTB3
tSTB4
tSRI
SRI
PREVIOUS
WORD
BIT 1
MSB
BIT 2
BIT 12
LSB
BIT 11
tASB
tLD1
tLD2
LD1, LD2
tPD
tPD1
SRO
(LTC8143 ONLY)
BIT 1 (MSB)
PREVIOUS WORD
BIT 2
BIT 3
BIT 12
LSB
BIT 1 (MSB)
CURRENT WORD
7543/8143 TD01
5
LTC7543/LTC8143
TRUTH TABLES
Table 1. LTC7543/LTC8143 Input Register
CONTROL INPUTS
STB1 STB2 STB3 STB4
0
1
0
0
1
0
0
0
0
0
0
1
1
X
X
X
X
1
X
X
X
X
0
X
X
X
X
1
Table 2. LTC7543/LTC8143 DAC Register
Input Register Operation
CONTROL INPUTS
(LTC8143: SRO Operation)
Serial Data Bit on SRI Loaded into Input
Register, MSB First
(LTC8143: Data Bit or SRI Appears on
SRO Pin After 12 Clocked Bits)
CLR
0
LD1
X
LD2
X
1
1
1
X
X
1
No DAC Register Operation
1
0
0
Load DAC Register with the Contents of Input
Register
No Input Register Operation
(LTC8143: No SRO Operation)
DAC Register Operation
Reset DAC Register to All 0s (Asynchronous
Operation; No Effect on Input Register)
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TYPICAL APPLICATIONS
Unipolar Operation (2-Quadrant Multiplication)
VREF
–10V TO 10V
5V
0.1µF
13
10
4
7
5
6
9
8
11
µP
14
15
16
STB3 CLR VDD VREF RFB
STB1
SRI
LTC7543
LD1
SRO (LTC8143) LTC8143
LD2
STB2
STB4
DGND
AGND
12
33pF
OUT 1
OUT 2
1
–
+
LT1097
2
3
TO NEXT DAC
FOR DAISY-CHAINING
(LTC8143)
7543/8143 TA03
Unipolar Binary Code Table
DIGITAL INPUT
BINARY NUMBER IN
DAC REGISTER
MSB
LSB
6
VOUT
0V TO –VREF
ANALOG OUTPUT
VOUT
1111
1111
1111
– VREF (4095/4096)
1000
0000
0000
– VREF (2048/4096) = – VREF /2
0000
0000
0001
– VREF (1/4096)
0000
0000
0000
0V
LTC7543/LTC8143
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TYPICAL APPLICATIONS
Bipolar Operation (4-Quadrant Multiplication)
VREF
–10V TO 10V
5V
0.1µF
15
14
VDD
R2
20k
16
VREF
OUT 1
(LOGIC INPUTS
OMITTED FOR
CLARITY)
–
1
LTC7543
LTC8143
OUT 2
DGND
R3
20k
33pF
RFB
+
1/2
LT1112
R1
10k
–
1/2
LT 1112
+
2
VOUT
AGND
3
12
7543/8143 TA04
Bipolar Offset Binary Code Table
DIGITAL INPUT
BINARY NUMBER IN
DAC REGISTER
MSB
LSB
ANALOG OUTPUT
VOUT
1111
1111
1111
VREF (2047/2048)
1000
0000
0001
VREF (1/2048)
1000
0000
0000
0V
0111
1111
1111
– VREF (1/2048)
0000
0000
0000
– VREF (2048/2048) = – VREF
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.
7
LTC7543/LTC8143
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PACKAGE DESCRIPTION
Dimension in inches (millimeters) unless otherwise noted.
N Package
16-Lead Plastic DIP
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
(
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
0.255 ± 0.015*
0.065 (6.477 ± 0.381)
(1.651)
TYP
+0.025
0.325 –0.015
+0.635
8.255
–0.381
0.045 – 0.065
(1.143 – 1.651)
0.015
(0.381)
MIN
0.009 – 0.015
(0.229 – 0.381)
0.770*
(19.558)
MAX
)
0.045 ± 0.015
(1.143 ± 0.381)
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
N16 0694
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTURSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm).
S Package
16-Lead Plastic SOL
0.398 – 0.413
(10.109 – 10.490)
(NOTE 2)
0.291 – 0.299
(7.391 – 7.595)
(NOTE 2)
0.010 – 0.029 × 45°
(0.254 – 0.737)
0.005
(0.127)
RAD MIN
16
0.093 – 0.104
(2.362 – 2.642)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
14
13
12
11
10
9
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.050
(1.270)
TYP
NOTE 1
15
0.037 – 0.045
(0.940 – 1.143)
0.016 – 0.050
(0.406 – 1.270)
0.004 – 0.012
(0.102 – 0.305)
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.
2. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
1
2
3
4
5
6
7
8
SOL16 0392
RELATED PARTS
PART NUMBER
DESCRIPTION
LTC1257
Complete Serial I/O VOUT 12-Bit DAC
5V to 15V Single Supply in 8-Pin SO and PDIP
LTC1451/LTC1452/LTC1453
Complete Serial I/O VOUT 12-Bit DACs
3V/5V Single Supply in 8-Pin SO and PDIP
LTC7541A
Parallel I/O Mulitplying 12-Bit DAC
12-Bit Wide Input
LTC8043
Serial Mulitplying 12-Bit DAC
8-Pin SO and PDIP
8
Linear Technology Corporation
COMMENTS
LT/GP 0695 10K • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977
 LINEAR TECHNOLOGY CORPORATION 1995
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