AD8278ARMZ-RL Analog Devices Inc, AD8278ARMZ-RL Datasheet - Page 18

• Manufacturer Part Number: AD8278ARMZ-RL
• Description: SingleG=0/5.2 LowPowerWideInputRange
• Manufacturer: Analog Devices Inc

Specifications of AD8278ARMZ-RL

• Amplifier Type: Differential
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 1.4 V/µs
• Gain Bandwidth Product: 1MHz
• Voltage - Input Offset: 50µV
• Current - Supply: 200µA
• Current - Output / Channel: 15mA
• Voltage - Supply, Single/dual (±): 2 V ~ 36 V, ±2 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Current - Input Bias: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8278
APPLICATIONS INFORMATION
CONFIGURATIONS
The AD8278 can be configured in several ways, as a difference
amplifier or a single-ended amplifier (see Figure 48 to Figure 54).
All of these configurations have excellent gain accuracy and
gain drift because they rely on the internal matched resistors.
Note that Figure 50 shows the AD8278 as a difference amplifier
with a midsupply reference voltage at the noninverting input.
This allows the AD8278 to be used as a level shifter, which is
appropriate in single-supply applications that are referenced
to midsupply. Table 9 lists several single-ended amplifier
configurations that are not illustrated.
Table 9. Difference and Single-Ended Amplifier Configurations
Amplifier Configuration
Difference Amplifier
Difference Amplifier
Single-Ended Inverting Amplifier
Single-Ended Inverting Amplifier
Single-Ended Non Inverting Amplifier
Single-Ended Non Inverting Amplifier
Single-Ended Non Inverting Amplifier
Single-Ended Non Inverting Amplifier
Single-Ended Non Inverting Amplifier
Single-Ended Non Inverting Amplifier
Figure 50. Difference Amplifier, Gain = ½, Referenced to Midsupply
V
–IN
+IN
OUT
Figure 48. Difference Amplifier, Gain = ½
Figure 49. Difference Amplifier, Gain = 2
V
V
–IN
+IN
–IN
+IN
= ½(V
OUT
OUT
2
3
40kΩ
40kΩ
= ½(V
= 2(V
IN+
2
3
5
1
40kΩ
40kΩ
20kΩ
20kΩ
− V
IN+
IN+
IN−
− V
− V
) + V
20kΩ
20kΩ
IN−
IN−
)
REF
)
20kΩ
20kΩ
40kΩ
40kΩ
5
6
1
V
REF
5
6
1
2
6
3
OUT
= MIDSUPPLY
OUT
OUT
Signal Gain
+½
+2
−½
−2
+3⁄2
+3
+½
+1
+1
+2
Rev. 0 | Page 18 of 24
Pin 1 (REF)
GND
IN+
GND
GND
IN
IN
GND
IN
GND
IN
Figure 51. Difference Amplifier, Gain = 2, Referenced to Midsupply
Pin 2 (VIN−)
IN−
OUT
OUT
GND
OUT
IN
GND
GND
OUT
OUT
V
+IN
–IN
OUT
Figure 53. Noninverting Amplifier, Gain = 1.5
Figure 54. Noninverting Amplifier, Gain = 2
Figure 52. Inverting Amplifier, Gain = −½
V
IN
V
= 2(V
IN
V
OUT
OUT
IN
5
1
OUT
20kΩ
20kΩ
1
= 1.5V
= 2V
IN+
2
3
= –½V
5
1
2
1
3
40kΩ
40kΩ
20kΩ
− V
20kΩ
20kΩ
IN
40kΩ
40kΩ
20kΩ
IN
IN−
IN
Pin 3 (VIN+)
IN+
GND
GND
GND
IN
IN
IN
GND
IN
GND
) + V
40kΩ
40kΩ
REF
20kΩ
40kΩ
40kΩ
20kΩ
2
6
3
V
REF
5
6
6
3
5
6
2
OUT
= MIDSUPPLY
OUT
OUT
OUT
Pin 5 (SENSE)
OUT
IN−
OUT
IN
OUT
GND
OUT
OUT
GND
GND