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DAC0832LCJ 데이터시트 PDF




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부품번호 DAC0832LCJ 기능
기능 8-Bit P Compatible/ Double-Buffered D to A Converters
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DAC0832LCJ 데이터시트, 핀배열, 회로
May 1999
DAC0830/DAC0832
8-Bit µP Compatible, Double-Buffered D to A Converters
General Description
The DAC0830 is an advanced CMOS/Si-Cr 8-bit multiplying
DAC designed to interface directly with the 8080, 8048,
8085, Z80®, and other popular microprocessors. A deposited
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent tem-
perature tracking characteristics (0.05% of Full Scale Range
maximum linearity error over temperature). The circuit uses
CMOS current switches and control logic to achieve low
power consumption and low output leakage current errors.
Special circuitry provides TTL logic input voltage level com-
patibility.
Double buffering allows these DACs to output a voltage cor-
responding to one digital word while holding the next digital
word. This permits the simultaneous updating of any number
of DACs.
The DAC0830 series are the 8-bit members of a family of
microprocessor-compatible DACs (MICRO-DAC).
Features
n Double-buffered, single-buffered or flow-through digital
data inputs
n Easy interchange and pin-compatible with 12-bit
DAC1230 series
n Direct interface to all popular microprocessors
n Linearity specified with zero and full scale adjust
only — NOT BEST STRAIGHT LINE FIT.
n Works with ±10V reference-full 4-quadrant multiplication
n Can be used in the voltage switching mode
n Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
n Operates “STAND ALONE” (without µP) if desired
n Available in 20-pin small-outline or molded chip carrier
package
Key Specifications
n Current settling time: 1 µs
n Resolution: 8 bits
n Linearity: 8, 9, or 10 bits (guaranteed over temp.)
n Gain Tempco: 0.0002% FS/˚C
n Low power dissipation: 20 mW
n Single power supply: 5 to 15 VDC
Typical Application
BI-FETand MICRO-DACare trademarks of National Semiconductor Corporation.
Z80® is a registered trademark of Zilog Corporation.
© 1999 National Semiconductor Corporation DS005608
DS005608-1
www.national.com




DAC0832LCJ pdf, 반도체, 판매, 대치품
Electrical Characteristics (Continued)
TVAR=EF2=51˚C0..000 VDC unless otherwise noted. Boldface limits apply over temperature, TMINTATMAX. For all other limits
Parameter
Conditions
See
Note
VCC = 4.75 VDC
VCC = 15.75 VDC
Typ
(Note 12)
Tested
Limit
(Note 5)
VCC = 5 VDC ±5%
VCC = 12 VDC ±5%
to 15 VDC ±5%
Design
Limit
(Note 6)
Limit
Units
CONVERTER CHARACTERISTICS
Output Leakage IOUT1
Current Max
All data inputs
latched low
LJ & LCJ
LCN, LCWM & LCV
10
100 100
50 100
nA
IOUT2
All data inputs
latched high
LJ & LCJ
LCN, LCWM & LCV
100 100
50 100
nA
Output
IOUT1
All data inputs
Capacitance
IOUT2
latched low
IOUT1
All data inputs
IOUT2
latched high
DIGITAL AND DC CHARACTERISTICS
45
115
130
30
pF
pF
Digital Input
Max Logic Low
LJ: 4.75V
0.6
Voltages
LJ: 15.75V
0.8
LCJ: 4.75V
LCJ: 15.75V
0.7 VDC
0.8
LCN, LCWM, LCV
0.95 0.8
Digital Input
Min Logic High LJ & LCJ
LCN, LCWM, LCV
Max Digital inputs <0.8V
2.0 2.0 VDC
1.9 2.0
Currents
LJ & LCJ
−50 −200
−200
µA
LCN, LCWM, LCV
Digital inputs>2.0V
−160
−200
µA
LJ & LCJ
0.1 +10 +10 µA
LCN, LCWM, LCV
+8 +10
Supply Current Max
LJ & LCJ
1.2 3.5 3.5 mA
Drain
LCN, LCWM, LCV
1.7 2.0
Electrical Characteristics
TVAR=EF2=51˚C0..000 VDC unless otherwise noted. Boldface limits apply over temperature, TMINTATMAX. For all other limits
Symbol
Parameter
Conditions
See
Note
VCC=15.75 VDC
Typ
(Note 12)
Tested
Limit
(Note 5)
VCC=12 VDC±5%
to 15 VDC ±5%
Design Limit
(Note 6)
VCC=4.75 VDC
Typ
(Note 12)
Tested
Limit
(Note 5)
VCC=5
VDC±5%
Design
Limit
(Note 6)
AC CHARACTERISTICS
ts
Current Setting
VIL=0V, VIH=5V
Time
1.0
1.0
tW
Write and XFER
VIL=0V, VIH=5V
11
100
250
375 600
Pulse Width Min
9 320 320
900 900
tDS
Data Setup Time
VIL=0V, VIH=5V
9
100
250
375 600
Min
320 320
900 900
tDH
Data Hold Time
VIL=0V, VIH=5V
9
Min
30
30
50
50
tCS
Control Setup Time VIL=0V, VIH=5V
9
110
250
600 900
Min
320 320
1100
1100
tCH
Control Hold Time VIL=0V, VIH=5V
9
0
0
10
00
Min 0 0
Limit
Units
µs
ns
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating conditions.
Note 2: All voltages are measured with respect to GND, unless otherwise specified.
www.national.com
4

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DAC0832LCJ 전자부품, 판매, 대치품
Definition of Terms (Continued)
Differential Nonlinearity: The difference between any two
consecutive codes in the transfer curve from the theoretical
1 LSB to differential nonlinearity.
Monotonic: If the output of a DAC increases for increasing
digital input code, then the DAC is monotonic. An 8-bit DAC
which is monotonic to 8 bits simply means that increasing
digital input codes will produce an increasing analog output.
FIGURE 1. DAC0830 Functional Diagram
DS005608-4
Typical Performance Characteristics
Digital Input Threshold
vs. Temperature
Digital Input Threshold
vs. VCC
Gain and Linearity Error
Variation vs. Temperature
DS005608-26
DS005608-27
DS005608-28
7 www.national.com

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