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参数资料
| 型号： | EPF10K30A |
| 厂商： | Altera Corporation |
| 英文描述： | Embedded Programmable Logic Family(FLEX10K嵌入式可编程逻辑系列) |
| 中文描述： | 嵌入式可编程逻辑系列（FLEX10K嵌入式可编程逻辑系列） |
| 文件页数： | 3/8页 |
| 文件大小： | 193K |
| 代理商： | EPF10K30A |
Philips Semiconductors
Application note
AN101
Applying the DAC08
1988 Dec
3
R14
14
15
4
2
R15
I
O
I
0
DAC08
V
REF
R
REF
SL00682
Figure 2. Basic Negative Reference Operation
+V
REF
I
REF
R
REF
IN
R
IN
14
15
DAC08
V
IN
R
REF
14
15
DAC08
V
REF
V
IN
HIGH INPUT
IMPEDANCE
R15; OPTIONAL
SL00683
Figure 3. Accommodating Bipolar References
2mA
14
15
DAC08
LOW T.C.
4.5k
I
REF
(–)
1V
APPROX.
5K
50K
PTO
–10V
SL00684
Figure 4. Recommended Full-Scale Adjustment Circuit
Fastest settling times are obtained when Pin 1 sees a low
impedance. If Pin 1 is connected to a 1k
divider, for example, it
should be bypassed to ground by a 0.01
μ
F capacitor.
Analog Output Currents
Both true and complemented output sink currents are provided,
where I
O
+I
O
=I
FS
. Current appears at the true output when a 1 is
applied to each logic input. As the binary count increases, the sink
current at Pin 4 increases proportionally, in the fashion of a positive
logic D-to-A converter. When a 0 is applied to any input bit, that
current is turned off at Pin 4 and turned on at Pin 2. A decreasing
logic count increases I
O
as in a negative or inverted logic D-to-A
converter. Both outputs may be used simultaneously. If one of the
outputs is not required it must still be connected to ground or to a
point capable of sourcing I
FS
. Do not leave an unused output pin
open.
Both outputs have an extremely wide voltage compliance enabling
fast direct current-to-voltage conversion through a resistor tied to
ground or other voltage source. Positive compliance is 36V above V-
and is independent of the positive supply. Negative compliance is
given by the equation:
V
(I
REF
1k )
3.0V
Note that lower values of I
REF
will allow a greater output
compliance.
The dual outputs enable double the usual peak-to-peak load swing
when driving loads in quasi-differential fashion. This feature is
especially useful in cable driving, CRT deflection and in other
balanced applications such as balanced-bridge A/D circuits, as well
as driving center-tapped coils and transformers.
–V
REF
OPTIONAL RESISTOR
FOR OFFSET INPUTS
R
IN
R
REF
REQ
～
200
R
p
NO CAP
14
1516
4
2
OV
SL00685
Figure 5. Pulsed Reference Operation
Power Supplies
The DAC08 operates over a wide range of power supply voltages
from a total supply of 9V to 36V. When operating at supplies of
±
5V
or less, I
REF
≤
1mA is recommended.
Low reference current operation decreases power consumption and
increases negative compliance, reference amplifier negative
common-mode range, negative logic input range, and negative logic
threshold range. Consult the various figures for guidance. For
example, operation at -4.5V with I
REF
=2mA is not recommended
because negative output compliance would be reduced to near zero.
Operation from lower supplies is possible; however, at least 8V total
must be applied between Pins 2 and 4, and Pin 3 to insure turn-on
of the internal bias network.
Symmetrical supplies are not required, as the DAC08 is quite
insensitive to variations in supply voltage. Battery operation is
feasible as no ground connection is required; however, an artificial
ground may be useful to insure logic swings, etc., remain between
acceptable limits.
Power consumption may be calculated by this equation:
P
D
(I
) (V
)
(I
) (V
)
(I
REF
)(V
)
A useful feature of the DAC08 design is that supply current is
constant and independent of input logic states. This is useful in
cryptographic applications and further serves to reduce the size of
the power supply bypass capacitors.
Temperature Performance
The linearity and monotonicity specifications of the DAC08 are
guaranteed to apply over the entire rated operating temperature
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EPF10K30ABC3561 | 制造商:ALTERA 功能描述:* |
| EPF10K30ABC356-1 | 功能描述:FPGA - 现场可编程门阵列 FPGA - Flex 10K 216 LABs 246 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256 |
| EPF10K30ABC3562 | 制造商:ALTERA 功能描述:New |
| EPF10K30ABC356-2 | 功能描述:FPGA - 现场可编程门阵列 FPGA - Flex 10K 216 LABs 246 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256 |
| EPF10K30ABC356-3 | 功能描述:FPGA - 现场可编程门阵列 FPGA - Flex 10K 216 LABs 246 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256 |
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