LTC8043FN8 [Linear]
Serial 12-Bit Multiplying DAC in SO-8; 串行12位的SO- 8乘法DAC
| 型号： | LTC8043FN8 |
| 厂家： | 
Linear |
| 描述： | Serial 12-Bit Multiplying DAC in SO-8 |
| 文件： | 总4页 (文件大小：178K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC8043
Serial 12-Bit Multiplying
DAC in SO-8
U
FEATURES
DESCRIPTION
The LTC®8043 is a serial-input 12-bit multiplying digital-
to-analog converter (DAC). It is a superior pin compatible
replacement for the DAC-8043. Improvements include
better accuracy, better stability over temperature and
supply variations, lower sensitivity to output amplifier
offset, tighter timing specifications and lower output ca-
pacitance.
■
Improved Direct Replacement for DAC-8043 and
MAX543
SO-8 Package
DNL and INL Over Temperature: ±0.5LSB
■
■
■
■
■
■
■
Easy, Fast and Flexible Serial Interface
1LSB Maximum Gain Error
4-Quadrant Multiplication
Low Power Consumption
Low Cost
±
An easy-to-use 3-wire serial interface is well-suited to
remote or isolated applications
U
The LTC8043 is extremely versatile. It can be used for
2-quadrant and 4-quadrant multiplying, programmable
gain and single supply applications, such as noninverting
voltage output mode.
APPLICATIONS
■
Process Control and Industrial Automation
■
Remote Microprocessor-Controlled Systems
■
Digitally Controlled Filters and Power Supplies
Parts are available in 8-pin SO and PDIP packages and are
specified over the extended industrial temperature range,
–40°C to 85°C.
■
Programmable Gain Amplifiers
Automatic Test Equipment
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATION
Integral Nonlinearity Over Temperature
1.0
SO-8 Multiplying DAC Has Easy 3-Wire Serial Interface
V
IN
5V
T
A
= 85°C
0.5
0
T = 25°C
A
8
1
2
R
FB
33pF
V
V
DD
REF
7
6
5
CLK
SRI
LD
CLOCK
DATA
LOAD
–
3
I
LTC8043
OUT
LT®1097
+
V
OUT
T = –40°C
A
GND
4
–0.5
LTC8043 • TA01
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
LTC8043 • TPC02
1
LTC8043
W W
U W
U
W U
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
VDD to GND................................................. –0.5V to 7V
Digital Inputs to GND.................. –0.5V to (VDD + 0.5V)
VIOUT to GND ............................... –0.5V to (VDD + 0.5V)
VREF to GND.......................................................... ±25V
TOP VIEW
ORDER PART
NUMBER
1
2
3
4
V
DD
8
7
6
5
V
REF
CLK
SRI
LD
R
FB
I
LTC8043EN8
LTC8043FN8
LTC8043ES8
LTC8043FS8
OUT
V
RFB to GND .......................................................... ±25V
GND
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
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/ W (N8)
TJMAX = 150°C, θJA = 190°C/ W (S8)
Consult factory for Military grade parts.
ACCURACY CHARACTERISTICS
VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified.
LTC8043E
MIN TYP
12
LTC8043F
SYMBOL PARAMETER
CONDITIONS
MAX
MIN
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
LSB
Resolution
●
●
●
12
INL
DNL
GE
Integral Nonlinearity
Differential Nonlinearity
Gain Error
(Note 1)
±0.5
±0.5
±1
±2
±1
±1
±2
±2
Guaranteed Monotonic, T to T
(Note 2)
MIN
MAX
T = 25°C
A
MIN
T
to T
●
●
MAX
Gain Temperature Coefficient (Note 3)
(∆Gain/∆Temp)
1
5
1
5
ppm/°C
I
Output Leakage Current
(Note 4)
T = 25°C
±5
±25
±5
±25
nA
nA
LKG
A
T
to T
●
MIN
MAX
Zero-Scale Error
T = 25°C
±0.03
±0.15
±0.03
±0.15
LSB
LSB
A
T
to T
●
●
MIN
MAX
PSRR
Power Supply Rejection Ratio
V
= 5V ±5%
±0.0001 ±0.002
±0.0001 ±0.002
%/%
DD
ELECTRICAL CHARACTERISTICS
VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified.
ALL GRADES
SYMBOL PARAMETER
Reference Input
CONDITIONS
(Note 5)
MIN
TYP
MAX
UNITS
kΩ
R
REF
V
Input Resistance
REF
●
7
11
15
AC Performance (Note 3)
Output Current Settling Time
(Notes 6, 7)
●
●
●
●
●
0.25
0.7
2
1
1
µs
Multiplying Feedthrough Error
Digital-to-Analog Glitch Energy
Total Harmonic Distortion
V
= ±10V, 10kHz Sinewave
mV
P-P
REF
(Notes 6, 8)
(Note 9)
20
nVSEC
dB
THD
–108 –92
17
Output Noise Voltage Density
(Note 10)
nV/√Hz
Analog Outputs (Note 3)
Output Capacitance
C
DAC Register Loaded to All 1s
DAC Register Loaded to All 0s
●
●
60
30
90
60
pF
pF
OUT
2
LTC8043
ELECTRICAL CHARACTERISTICS
VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified.
ALL GRADES
SYMBOL PARAMETER
Digital Inputs
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Current
●
●
●
●
2.4
V
V
IH
IL
0.8
±1
8
I
V
V
= 0V to V
DD
0.001
µA
pF
IN
IN
IN
C
IN
Digital Input Capacitance
= 0V,(Note 3)
Timing Characteristics (Note 3)
t
t
t
t
t
t
t
Serial Input to Clock Setup Time
Serial Input to Clock Hold Time
Serial Input Data Pulse Width
Clock Pulse Width High
●
●
●
●
●
●
●
30
60
80
80
80
140
0
–5
25
ns
ns
ns
ns
ns
ns
ns
DS
DH
SRI
CH
CL
Clock Pulse Width Low
Load Pulse Width
LD
LSB Clocked into Input Register
to Load DAC Register Time
ASB
Power Supply
V
Supply Voltage
Supply Current
●
4.75
5
5.25
V
DD
I
Digital Inputs = 0V or V
●
●
100
500
µA
µA
DD
DD
IN
Digital Inputs = V or V
IH
The
● denotes specifications which apply over the full operating
Note 7: To 0.01% for a full-scale change, measured from
falling edge of LD.
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 8: V = 0V. DAC register contents changed from all 0s to all 1s or
from all 1s to all 0s.
REF
Note 9: V = 6V
at 1kHz. DAC register loaded with all 1s.
RMS
REF
Note 10: 10Hz to 100kHz between R and I . Calculation from e =
√4KTRB where: K = Boltzmann constant (J/K°); R = resistance (Ω);
T = resistor temperature (°K); B = bandwidth (Hz).
Note 4: I
with DAC register loaded with all 0s.
FB
OUT
n
OUT
Note 5: Typical temperature coefficient is 100ppm/°C.
Note 6: I
load = 100Ω in parallel with 13pF.
OUT
W
BLOCK DIAGRAM
20k
40k
20k
40k
20k
V
R
FB
1
2
REF
10k
40k
40k
40k
40k
40k
3
4
I
OUT
V
DD
8
GND
DECODER
BIT 1
(MSB)
BIT 2
BIT 3
DAC REGISTER
BIT 4
BIT 12
(LSB)
LOAD
CLK
5
7
LD
CLK
INPUT 12-BIT SHIFT REGISTER
SRI
IN
6
8043 BD
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
3
LTC8043
W U
W
TI I G DIAGRA
t
DH
t
DS
t
t
CH
CL
CLK INPUT
t
SRI
PREVIOUS
WORD
BIT 1
MSB
BIT 12
LSB
BIT 2
BIT 11
SRI
LD
t
ASB
t
LD
8043TD01
U
TYPICAL APPLICATIONS N
Unipolar Operation (2-Quadrant Multiplication)
V
5V
REF
Table 1. Unipolar Binary Code Table
DIGITAL INPUT
–10V TO 10V
0.1µF
8
1
2
33pF
BINARY NUMBER
IN DAC REGISTER
ANALOG OUTPUT
V
V
R
FB
DD
REF
7
6
5
VOUT
CLK
SRI
LD
–
3
MSB
LSB
I
µP
LTC8043
OUT
1111 1111 1111 –VREF (4095/4096)
1000 0000 0000 –VREF (2048/4096) = –VREF/2
0000 0000 0001 –VREF (1/4096)
0000 0000 0000 0V
V
LT1097
OUT
+
GND
4
LTC8043 • TA03
Bipolar Operation (4-Quadrant Multiplication)
R3
20k
R2
20k
Table 2. Bipolar Offset Binary Code Table
V
REF
–10V TO 10V
5V
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
ANALOG OUTPUT
VOUT
0.1µF
8
1
2
33pF
MSB
LSB
V
V
R
DD
REF
FB
7
6
5
1111
1000
1000
0111
0000
1111 1111
0000 0001
0000 0000
1111 1111
0000 0000
+VREF (2047/2048)
+VREF (1/2048)
0V
–VREF (1/2048)
–VREF (2048/2048) = –VREF
CLK
SRI
LD
–
3
R1
10k
I
OUT
µP
LTC8043
–
1/2 LT1112
+
GND
4
1/2 LT1112
+
V
OUT
LTC8043 • TA04
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1257
Complete Serial I/O V
Complete Serial I/O V
12-Bit DAC
5V to 15V Single Supply in 8-Pin SO and PDIP
3V/5V Single Supply in 8-Pin SO and PDIP
12-Bit Wide Input
OUT
OUT
LTC1451/LTC1452/LTC1453
LTC7541A
12-Bit DACs
Parallel I/O Multiplying 12-Bit DAC
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LTC7543/LTC8143
Clear Pin and Serial Data Output (LTC8143)
LT/GP 1195 • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
4
●
●
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LINEAR TECHNOLOGY CORPORATION 1995
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