AD204JN Analog Devices Inc, AD204JN Datasheet - Page 9

• Manufacturer Part Number: AD204JN
• Description: IC, ISOLATION AMPLIFIER, 5KHZ, DIP-10
• Manufacturer: Analog Devices Inc
• Type: Isolation Amplifierr

Specifications of AD204JN

• No. Of Amplifiers: 1
• Isolation Voltage: 750Vrms
• Gain Non-linearity Max: 0.05%
• Amplifier Case Style: DIP
• No. Of Pins: 10
• Input Offset Voltage: 15mV
• Bandwidth: 5kHz
• Rohs Status: RoHS non-compliant
• Amplifier Type: Isolation
• Number Of Circuits: 4
• Gain Bandwidth Product: 5kHz
• Current - Input Bias: 30pA
• Voltage - Input Offset: 15000µV
• Current - Output / Channel: 2mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 38-DIP (0.500", 12.70mm), 11 Leads
• Number Of Channels: 1
• Number Of Elements: 1
• Common Mode Rejection Ratio: 130dB
• Voltage Gain Db: 40dB
• Input Resistance: 2000MOhm
• Input Bias Current: 30pA
• Rail/rail I/o Type: No
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 11
• Package Type: PDIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Output Type: -
• Voltage - Supply, Single/dual (±): -
• -3db Bandwidth: -
• Slew Rate: -
• Lead Free Status / Rohs Status: Not Compliant

Synchronization. Since AD204s operate from a common
clock, synchronization is inherent. AD202s will normally not
interact to produce beat frequencies even when mounted on
0.25-inch centers. Interaction may occur in rare situations where
a large number of long, unshielded input cables are bundled
together and channel gains are high. In such cases, shielded
cable may be required or AD204s can be used.
APPLICATIONS EXAMPLES
Low Level Sensor Inputs. In applications where the output of
low level sensors such as thermocouples must be isolated, a low
drift input amplifier can be used with an AD204, as shown in
REV. D
GRID
0.1”
100pF
1
3
5
R
CHANNEL 0
F
HI
LO
HI
Figure 16b.
LO
R
39k
G
2
4
6
1
3
5
R
CHANNEL 1
F
+
OPEN INPUT
DETECTION
HI
OPTIONAL
Figure 17. Input Amplifier and Filter for Sensor Signals
220M
1 F
LO
R
G
2
4
6
AD OP-07
100pF
49.9k
R
470k
1 F
G
0.038 F
+
0.15 F
–9–
470k
1 F
Figure 17. A three-pole active filter is included in the design to
get normal-mode rejection of frequencies above a few Hz and to
provide enhanced common-mode rejection at 60 Hz. If offset
adjustment is needed, it is best done at the trim pins of the OP07
itself; gain adjustment can be done at the feedback resistor.
Note that the isolated supply current is large enough to mandate
the use of 1 mF supply bypass capacitors. This circuit can be
used with an AD202 if a low power op amp is used instead of
the OP07.
Process Current Input with Offset. Figure 18 shows an
isolator receiver that translates a 4-20 mA process current
signal into a 0 V to 10 V output. A 1 V to 5 V signal appears at
the isolator’s output, and a –1 V reference applied to output LO
provides the necessary level shift (in multichannel applications,
the reference can be shared by all channels). This technique is
often useful for getting offset with a follower-type output buffer.
The circuit as shown requires a source compliance of at least
5 V, but if necessary that can be reduced by using a lower value
of current-sampling resistor and configuring the input amplifier
for a small gain.
(NOTE: Circuit figures shown on this page are for SIP-style packages. Refer to
Page 3 for proper DIP package pinout.)
4–20mA
+
Figure 18. Process Current Input Isolator with Offset
–7.5V
+7.5V
250
AD204
ADDITIONAL
CHANNELS
CLK
–1V TO
V
O
AD202
AD204
–
+
CLK RET
= V
OR
I
(
237
1 +
+
–
50k
1V
TO
5V
R
G
AD202/AD204
AD589
1k
)
–15V
6.8k
+15V
–15V
10k
15k
0V
TO
10V
+
–