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PDF MP7528 Data sheet ( Hoja de datos )
| Número de pieza | MP7528 | |
| Descripción | CMOS Dual Buffered Multiplying 8-Bit Digital-to-Analog Converter | |
| Fabricantes | Exar Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MP7528 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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m MP7528CMOS
.co Dual Buffered Multiplying 8-Bit
U Digital-to-Analog Converter
heet4FEATURES
taS• On-Chip Latches for Both DACs
a• +5 V to +15 V Operation
.D• DACs Matched to 1%
• Four Quadrant Multiplication
w• 15 V CMOS Compatible
w• See MP7529A or MP7529B for Improved Performance
APPLICATIONS
• Microprocessor Controlled Gain Circuits
• Microprocessor Controlled Attenuator Circuits
• Microprocessor Controlled Function Generation
• Precision AGC Circuits
• Bus Structured Instruments
w .comGENERAL DESCRIPTION
The MP7528 is a dual 8-bit digital/analog converter designed
Uusing EXAR’s proven decoded DAC architecture. It features ex-
cellent DAC-to-DAC matching and guaranteed monotonicity.
t4Separate on-chip latches are provided for each DAC to allow
easy microprocessor interface.
eData is transferred into either of the two DAC data latches via
ea common 8-bit TTL/CMOS compatible input port. Control input
DACA/DACB determines which DAC is to be loaded. The
MP7528’s load cycle is similar to the write cycle of a random ac-
cess memory and the device is bus compatible with most 8-bit
microprocessors.
The device operates from a +5V to +15V power supply with
only 2 mA of current (maximum).
Both DACs offer excellent four quadrant multiplication char-
acteristics with a separate reference input and feedback resistor
for each DAC.
ShSIMPLIFIED BLOCK AND TIMING DIAGRAM
ataVDD
VREFA
.DDB7-DB0
wDACA/DACB
ww .comCS
eet4UWR
DQ
LATCH A
E
DAC A
DQ
LATCH B
E
DAC B
DGND
VREFB
RFBA
IOUTA
RFBB
IOUTB
AGND
DB7-DB0
DACA/DACB
CS
WR
OUT
www.DataShRev. 2.00
1
1 page  
MP7528
ELECTRICAL CHARACTERISTICS (CONT’D)
Parameter
25°C
Symbol Min Typ Max
DIGITAL INPUTS3
Logical “1” Voltage
Logical “0” Voltage
Input Leakage Current
Input Capacitance2
Data
Control
ANALOG OUTPUTS2
VIH
VIL
ILKG
CIN
CIN
2.4
0.8
+1
10
15
Output Capacitance
POWER SUPPLY5
COUTA
COUTA
COUTB
COUTB
120
50
120
50
Functional Voltage Range2
Supply Current
VDD
IDD
4.5
15.75
2
2
SWITCHING
CHARACTERISTICS4
Chip Select to Write Set-Up Time
Chip Select to Write Hold Time
DAC Select to Write Set-Up Time
DAC Select to Write Hold Time
Data Valid to Write Set-Up Time
Data Valid to Write Hold Time
Write Pulse Width
tCS 200
tCH 20
tAS 200
tAH 20
tDS 110
tDH 0
tWR 180
Tmin to Tmax
Min Max Units
Test Conditions/Comments
2.4 V
0.8 V
+10 µA
10 pF
15 pF
120 pF
50 pF
120 pF
50 pF
DAC Inputs all 1’s
DAC Inputs all 0’s
DAC Inputs all 1’s
DAC Inputs all 0’s
4.5 15.75 V
2 mA
2 mA
All digital inputs = 0 V or all = 5 V
All digital inputs = VIL or all = VIH
230 ns
30 ns
230 ns
30
130 ns
0 ns
200 ns
NOTES:
1 Full Scale Range (FSR) is 10V for unipolar mode.
2 Guaranteed but not production tested.
3 Digital input levels should not go below ground or exceed the positive supply voltage, otherwise damage may occur.
4 See timing diagram.
5 Specified values guarantee functionality. Refer to other parameters for accuracy.
Specifications are subject to change without notice
Rev. 2.00
5
5 Page 
20 LEAD CERAMIC DUAL-IN-LINE
(300 MIL CDIP)
D20
MP7528
See
Note 1
S1
20
1
Base
Plane
Seating
Plane
Q
L
D
be
S
11
10
A
b1 L1
E1
E
c
α
SYMBOL
A
b
b1
c
D
E
E1
e
L
L1
Q
S
S1
α
INCHES
MIN MAX
––
0.014
0.038
0.008
0.200
0.023
0.065
0.015
––
0.220
0.290
1.060
0.310
0.320
0.100 BSC
0.125 0.200
0.150
––
0.015
––
0.005
0°
0.070
0.080
––
15°
MILLIMETERS
MIN MAX
––
0.356
0.965
0.203
5.08
0.584
1.65
0.381
–– 26.92
5.59 7.87
7.37 8.13
2.54 BSC
3.18 5.08
3.81 ––
0.381
––
0.13
0°
1.78
2.03
––
15°
NOTES
––
––
2
––
4
4
7
5
––
––
3
6
6
––
NOTES
1. Index area; a notch or a lead one identification mark
is located adjacent to lead one and is within the
shaded area shown.
2. The minimum limit for dimension b1 may be 0.023
(0.58 mm) for all four corner leads only.
3. Dimension Q shall be measured from the seating
plane to the base plane.
4. This dimension allows for off-center lid, meniscus and
glass overrun.
5. The basic lead spacing is 0.100 inch (2.54 mm) be-
tween centerlines.
6. Applies to all four corners.
7. This is measured to outside of lead, not center.
Rev. 2.00
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MP7528.PDF ] | |
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