- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373898 > AD7393ARU (ANALOG DEVICES INC) Thyristor Diode Module; Repetitive Reverse Voltage Max, Vrrm:1600V; Current, It av:250A; Gate Trigger Current Max, Igt:4A; Package/Case:ND43; Current Rating:250A RoHS Compliant: Yes PDF資料下載
參數(shù)資料
| 型號： | AD7393ARU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | Thyristor Diode Module; Repetitive Reverse Voltage Max, Vrrm:1600V; Current, It av:250A; Gate Trigger Current Max, Igt:4A; Package/Case:ND43; Current Rating:250A RoHS Compliant: Yes |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 70 us SETTLING TIME, 10-BIT DAC, PDSO20 |
| 封裝： | 1.10 MM HEIGHT, TSSOP-20 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 199K |
| 代理商： | AD7393ARU |
AD7392/AD7393
–10–
REV. A
UNIPOLAR OUTPUT OPERATION
This is the basic mode of operation for the AD7392. As shown
in Figure 29, the AD7392 has been designed to drive loads as
low as 5 k
in parallel with 100 pF. The code table for this
operation is shown in Table II.
1
20
19
17, 18
0.01
m
F
+2.7V TO +5.5V
V
DD
AGND/DGND
AD7392
0.1
m
F
10
m
F
DIGITAL INTERFACE
CIRCUITRY OMITTED
FOR CLARITY
V
OUT
R
L
$
5k
V
C
L
$
100pF
REF
EXT
REF
R
Figure 29. AD7392 Unipolar Output Operation
Table II. Unipolar Code Table
Hexadecimal
Number
in DAC Register
Decimal
Number
in DAC Register
Output
Voltage (V)
V
REF
= 2.5 V
2.4994
1.2506
1.2500
1.2494
0
FFF
801
800
7FF
000
4095
2049
2048
2047
0
The circuit can be configured with an external reference plus
power supply or powered from a single dedicated regulator
or reference depending on the application performance re-
quirements.
BIPOLAR OUTPUT OPERATION
Although the AD7393 has been designed for single-supply op-
eration, the output can be easily configured for bipolar opera-
tion. A typical circuit is shown in Figure 30. This circuit uses a
clean regulated +5 V supply for power, which also provides the
circuit’s reference voltage. Since the AD7393 output span swings
from ground to very near +5 V, it is necessary to choose an exter-
nal amplifier with a common-mode input voltage range that
extends to its positive supply rail. The micropower consump-
tion OP196 has been designed just for this purpose and results
in only 50 microamps of maximum current consumption. Con-
nection of the equal valued 470 k
resistors results in a differen-
tial amplifier mode of operation with a voltage gain of two,
which produces a circuit output span of ten volts (that is, –5 V
to +5 V). As the DAC is programmed from zero-code 000
H
to
midscale 200
H
to full scale 3FF
H
, the circuit output voltage V
O
is set at –5 V, 0 V and +5 V (minus 1 LSB). The output voltage
V
O
is coded in offset binary according to Equation 4.
V
O
=
D
512–1
×
5
Equation 4
where
D
is the decimal code loaded in the AD7393 DAC regis-
ter. Note that the LSB step size is 10/1024 = 10 mV. This cir-
cuit has been optimized for micropower consumption including
the 470 k
gain setting resistors, which should have low tem-
perature coefficients to maintain accuracy and matching (prefer-
ably the same resistor material, such as metal film). If better
stability is required, the power supply could be substituted with
a precision reference voltage such as the low drop out REF195,
which can easily supply the circuit’s 162
μ
A of current, and still
provide additional power for the load connected to V
O
. The
micropower REF195 is guaranteed to source 10 mA output
drive current, but only consumes 50
μ
A internally. If higher
resolution is required, the AD7392 can be used with the addi-
tion of two more bits of data inserted into the software coding,
which would result in a 2.5 mV LSB step size. Table III shows
examples of nominal output voltages V
O
provided by the Bipolar
Operation circuit application.
V
O
C
V
DD
REF
GND
<100
m
A
<2
m
A
470k
V
+5V
I
SY
< 162
m
A
OP196
470k
V
+5V
–5V
BIPOLAR
OUTPUT
SWING
–5V
AD7393
DIGITAL INTERFACE CIRCUITRY OMITTED FOR CLARITY
V
OUT
<50
m
A
Figure 30. Bipolar Output Operation
Table III. Bipolar Code Table
Hexadecimal
Number
In DAC Register
Decimal
Number
in DAC Register
Analog
Output
Voltage (V)
3FF
201
200
1FF
000
1023
513
512
511
0
4.9902
0.0097
0.0000
–0.0097
–5.0000
相關PDF資料 |
PDF描述 |
|---|---|
| AD7393 | +3 V, Parallel Input Micropower 10- and 12-Bit DACs |
| AD7393AN | +3 V, Parallel Input Micropower 10- and 12-Bit DACs |
| AD7393AR | +3 V, Parallel Input Micropower 10- and 12-Bit DACs |
| AD7398BR-REEL7 | Quad, Serial-Input 12-Bit/10-Bit DACs |
| AD7399BR-REEL7 | Quad, Serial-Input 12-Bit/10-Bit DACs |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ad7393aru-reel | 制造商:Rochester Electronics LLC 功能描述:10-BIT +3V TO +5V UPOWER DAC, PARALLEL - Tape and Reel 制造商:Analog Devices 功能描述: |
| AD7393ARZ | 制造商:Analog Devices 功能描述:DAC 1-CH R-2R 10-bit 20-Pin SOIC W |
| AD7394 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V, Dual, Serial Input 12-/10-Bit DACs |
| AD7394AN | 制造商:Rochester Electronics LLC 功能描述:X2, 12-BIT, +3V UPWR DAC - Bulk 制造商:Analog Devices 功能描述:IC 12BIT DAC 7394 DIP14 |
| AD7394AR | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 12-bit 14-Pin SOIC N 制造商:Analog Devices 功能描述:Digital-Analog Converter IC Interface Ty |
發(fā)布緊急采購，3分鐘左右您將得到回復。