AD8205YRZ Analog Devices Inc, AD8205YRZ Datasheet - Page 9

• Manufacturer Part Number: AD8205YRZ
• Description: IC AMP DIFF 8SOIC
• Manufacturer: Analog Devices Inc
• Type: Differential Ampr

Specifications of AD8205YRZ

• Amplifier Type: Differential
• Number Of Circuits: 1
• Slew Rate: 0.5 V/µs
• -3db Bandwidth: 50kHz
• Voltage - Input Offset: 2000µV
• Current - Supply: 2mA
• Voltage - Supply, Single/dual (±): 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Channels: 1
• Number Of Elements: 1
• Power Supply Requirement: Single
• Common Mode Rejection Ratio: 76dB
• Voltage Gain Db: 33.98dB
• Input Resistance: 0.4@5V@-40C TOMohm
• Input Offset Voltage: 2@5VmV
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Rejection Ratio: 70dB
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC
• No. Of Amplifiers: 1
• Bandwidth: 50kHz
• Supply Voltage Range: 4.5V To 5.5V
• Supply Current: 2mA
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Current - Output / Channel: -
• Gain Bandwidth Product: -
• Current - Input Bias: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

OUTPUT OFFSET ADJUSTMENT
The output of the AD8205 can be adjusted for unidirectional or
bidirectional operation.
UNIDIRECTIONAL OPERATION
Unidirectional operation allows the AD8205 to measure
currents through a resistive shunt in one direction. The basic
modes for unidirectional operation are ground referenced
output mode and V+ referenced output mode.
In the case of unidirectional operation, the output could be set
at the negative rail (near ground) or at the positive rail (near
V+) when the differential input is 0 V. The output moves to the
opposite rail when a correct polarity differential input voltage is
applied. In this case, full scale is approximately 100 mV. The
required polarity of the differential input depends on the output
voltage setting. If the output is set at the positive rail, the input
polarity needs to be negative to move the output down. If the
output is set at ground, the polarity is positive to move the
output up.
GROUND REFERENCED OUTPUT
When using the AD8205 in this mode, both reference inputs are
tied to ground, which causes the output to sit at the negative rail
when there are zero differential volts at the input (see Figure 14).
Table 4. V+ = 5 V
V
0 V
100 mV
IN
(Referred to −IN)
NC = NO CONNECT
+IN
–IN
NC
AD8205
Figure 14. Ground Referenced Output
GND
V+
V
V
OUT
REF
REF
V
0.05 V
4.8 V
1
2
O
Rev. B | Page 9 of 12
V+ REFERENCED OUTPUT
This mode is set when both reference pins are tied to the
positive supply. It is typically used when the diagnostic scheme
requires detection of the amplifier and the wiring before power
is applied to the load (see Figure 15).
Table 5. V+ = 5 V
V
0 V
100 mV
BIDIRECTIONAL OPERATION
Bidirectional operation allows the AD8205 to measure currents
through a resistive shunt in two directions.
In this case, the output is set anywhere within the output range.
Typically, it is set at half-scale for equal range in both directions.
In some cases, however, it is set at a voltage other than half-scale
when the bidirectional current is nonsymmetrical.
Table 6. V+ = 5 V, V
V
+40 mV
−40 mV
Adjusting the output is accomplished by applying voltage(s) to
the reference inputs.
V
internal offset node. There is no operational difference between
the pins.
IN
IN
REF
(Referred to −IN)
(Referred to −IN)
1 and V
REF
NC = NO CONNECT
2 are tied to internal resistors that connect to an
+IN
–IN
NC
AD8205
Figure 15. V+ Referenced Output
O
= 2.5 with V
GND
V
4.5 V
0.5 V
O
V+
IN
= 0 V
V
V
OUT
REF
REF
V
4.8 V
0.05 V
1
2
O
AD8205