AD8230YRZ Analog Devices Inc, AD8230YRZ Datasheet - Page 14

• Manufacturer Part Number: AD8230YRZ
• Description: IC AMP CHOPPER R-R PREC 8SOIC
• Manufacturer: Analog Devices Inc
• Type: Instrumentation Amplifierr

Specifications of AD8230YRZ

• Amplifier Type: Chopper (Zero-Drift)
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 2 V/µs
• Current - Input Bias: 150pA
• Voltage - Input Offset: 20µV
• Current - Supply: 3.2mA
• Current - Output / Channel: 15mA
• Voltage - Supply, Single/dual (±): 8 V ~ 16 V, ±4 V ~ 8 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 1
• Input Offset Voltage: 10µV
• Bandwidth: 2kHz
• Amplifier Output: Rail To Rail
• Cmrr: 120dB
• Supply Voltage Range: 8V To 16V, ± 4V To ± 18V
• Supply Current: 2.7mA
• Rohs Compliant: Yes
• Number Of Channels: 1
• Number Of Elements: 1
• Power Supply Requirement: Single/Dual
• Voltage Gain Db: 60dB
• Single Supply Voltage (typ): 9/12/15V
• Dual Supply Voltage (typ): ±5V
• Power Dissipation: 304mW
• Rail/rail I/o Type: Rail to Rail Input/Output
• Single Supply Voltage (min): 8V
• Single Supply Voltage (max): 16V
• Dual Supply Voltage (min): ±4V
• Dual Supply Voltage (max): ±8V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Gain Bandwidth Product: -
• Lead Free Status / Rohs Status: Compliant

AD8230
LAYOUT
The AD8230 has two reference pins: V
draws current to set the internal voltage references. In contrast,
V
output signal. As such, V
ground (or to a reference voltage). In addition, to maximize
CMR, the trace between V
be kept short.
APPLICATIONS
The AD8230 can be used in thermocouple applications, as
shown in Figure 3 and Figure 39. Figure 39 is an example of
such a circuit for use in an industrial environment. Series
resistors and low leakage diodes serve to clamp overload
voltages (see the Input Protection section for more information).
Figure 39. Type J Thermocouple with Overvoltage Protection and RFI Filter
REF
THERMOCOUPLE
2 does not draw current. It sets the common mode of the
TYPE J
100MΩ
100MΩ
REF
+V
–V
4.99kΩ
4.99kΩ
1 and V
S
S
REF
2 and the gain resistor, R
+V
+V
BAV199
BAV199
1µF
S
REF
S
–V
–V
2 should be star-connected to
0.1µF
S
S
4
5
REF
AD8230
3
+V
1 and V
2
6
S
–V
1
7
S
19.1kΩ
200Ω
REF
0.1µF
8
2. V
G
, should
REF
V
1
OUT
Rev. B | Page 14 of 16
An antialiasing filter reduces unwanted high frequency signals.
The matched 100 MΩ resistors serve to provide input bias
current to the input transistors and serve as an indicator as to
when the thermocouple connection is broken. Well-matched
1% 4.99 kΩ resistors are used to form the antialiasing filter. It is
good practice to match the source impedances to ensure high
CMR. The circuit is configured for a gain of 193, which
provides an overall temperature sensitivity of 10 mV/°C.
Measuring load cells in industrial environments can be a
challenge. Often, the load cell is located some distance away
from the instrumentation amplifier. The common-mode
potential can be several volts, exceeding the common-mode
input range of many 5 V auto-zero instrumentation amplifiers.
Fortunately, the wide common-mode input voltage range of the
AD8230 spans 16 V, relieving designers of having to worry
about the common-mode range.
Figure 40. Bridge Measurement with Filtered Output
350Ω
350Ω
+V
–V
S
S
350Ω
350Ω
0.1µF
4
5
AD8230
3
+V
2
6
S
–V
1
7
S
102kΩ
1kΩ
0.1µF
8
4kΩ
1µF
V
OUT