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參數(shù)資料
| 型號： | AD215BY |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Circular Connector; No. of Contacts:41; Series:LJTPQ00R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:21; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle |
| 中文描述： | ISOLATION AMPLIFIER, 1500 V ISOLATION-MIN, PSFM15 |
| 封裝： | SIP-12 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 234K |
| 代理商： | AD215BY |
AD215
REV. 0
–7–
POWE RING T HE AD215
T he AD215 is powered by a bipolar
±
15 V dc power supply
connected as shown in Figure 11. External bypass capacitors
should be provided in bused applications. Note that a small
signal-related current (50 mA/V
OUT
) will flow out of the OUT
LO pin (Pin 37). T herefore, the OUT LO terminals should be
bused together and referenced at a single “Analog Star Ground”
to the
±
15 V dc supply common as illustrated Figure 11.
AD215
N
AD215
1
OUT LO
N
N
TH
CHANNEL
1
ST
CHANNEL
ANALOG STAR GROUND
OUT LO
1
SIG COM
+V
IN
PWR RTN
–V
IN
+15V dc
COM
–15V dc
2.2μF
37
42
43
44
42
44
43
2.2μF
37
Figure 11. Typical Power Supply Connections
Power Supply Voltage Considerations
T he rated performance of the AD215 remains unaffected for
power supply voltages in the
±
14.5 V dc to
±
16.5 V dc range.
Voltages below
±
14.25 V dc may cause the AD215 to cease op-
erating properly.
Note: Power supply voltages greater than
±
17.5 V dc may damage
the internal components and consequently should not be used.
USING T HE AD215
Unity Gain Input Configuration
T he basic unity gain configuration for input signals of up to
±
10 V is shown in Figure 12.
R
IN
= 2k
V
SIGNAL
IN+
IN–
FB
IN COM
OUT HI
OUT LO
PWR
RTN
COM
TRIM
OUTPUT FILTER,
BUFFER AND
TRIM CIRCUITRY
1
3
4
2
38
36
37
43
AD215
Figure 12. Basic Unity Gain
Noninverting Configuration for Gain Greater T han Unity
Figure 13 shows how to achieve a gain greater than one while
continuing to preserve a very high input impedance. A recom-
mended PC board layout for multichannel applications is shown
in Figure 20b.
R
IN
= 2k
V
SIGNAL
IN+
IN–
FB
IN COM
OUT HI
OUT LO
PWR
RTN
COM
TRIM
OUTPUT
FILTER,
BUFFER
AND
TRIM
CIRCUITRY
1
3
4
2
38
36
37
43
AD215
C
47pF
R
F
R
G
Figure 13. Noninverting Input Configuration for
Gain > 1 V/V
In this circuit, the gain equation is as follows:
V
O
=
(1
+ R
F
/R
G
)
×
V
SIG
where:
V
O
= Output Voltage (V)
V
SIG
= Input Signal Voltage (V)
R
F
= Feedback Resistor Value (
)
R
G
= Gain Resistor Value (
)
T he values for resistors R
F
and R
G
are subject to the following
constraints:
T he total impedance of the gain network should be less than
10 k
.
T he current drawn in R
F
is less than 1 mA at
±
10 V. Note that
for each mA drawn by the feedback resistor, the isolated
power supply drive capability decreases by 1 mA.
Amplifier gain is set by the feedback (R
F
) and gain resistor
(R
G
).
It is recommended that R
F
is bypassed with a 47 pF capacitor as
shown.
Note: T he 2 k
input resistor (R
IN
) in series with the input
signal source and the IN+ terminal in Figures 12 and 13 is rec-
ommended to limit the current at the input terminals of the to
5.0 mA when the AD215 is not powered.
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