AD8279ARZ Analog Devices Inc, AD8279ARZ Datasheet - Page 18

• Manufacturer Part Number: AD8279ARZ
• Description: IC AMP DIFF LP 14SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD8279ARZ

• Amplifier Type: Differential
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 1.4 V/µs
• Gain Bandwidth Product: 1MHz
• Voltage - Input Offset: 50µV
• Current - Supply: 300µA
• 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: 14-SOIC (3.9mm Width), 14-SOL
• No. Of Amplifiers: 2
• Input Offset Voltage: 500µV
• Bandwidth: 1MHz
• Supply Voltage Range: 2V To 36V
• Supply Current: 200µA
• Amplifier Case Style: SOIC
• No. Of Pins: 14
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Current - Input Bias: -

AD8278/AD8279
APPLICATIONS INFORMATION
CONFIGURATIONS
The AD8278 and AD8279 can be configured in several ways
(see Figure 51 to Figure 57). These configurations have excellent
gain accuracy and gain drift because they rely on the internal
matched resistors. Note that Figure 53 shows the AD8278 and
AD8279 as difference amplifiers with a midsupply reference
voltage at the noninverting input. This allows the AD8278 and
AD8279 to be used as a level shifter, which is appropriate in
single-supply applications that are referenced to midsupply.
Table 10 lists several single-ended amplifier configurations
that are not illustrated.
Table 10. AD8278 Difference and Single-Ended Amplifier Configurations
Amplifier Configuration
Difference Amplifier
Difference Amplifier
Single-Ended Inverting Amplifier
Single-Ended Inverting Amplifier
Single-Ended Noninverting Amplifier
Single-Ended Noninverting Amplifier
Single-Ended Noninverting Amplifier
Single-Ended Noninverting Amplifier
Single-Ended Noninverting Amplifier
Single-Ended Noninverting Amplifier
Figure 53. Difference Amplifier, Gain = ½, Referenced to Midsupply
V
–IN
+IN
OUT
Figure 51. Difference Amplifier, Gain = ½
Figure 52. Difference Amplifier, Gain = 2
V
V
–IN
+IN
–IN
+IN
= ½ (V
OUT
OUT
2
3
40kΩ
40kΩ
= ½ (V
= 2(V
2
3
5
1
IN+
AD8278
40kΩ
40kΩ
20kΩ
20kΩ
− V
IN+
IN+
AD8278
AD8278
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. C | Page 18 of 24
Pin 1 (REF)
GND
IN+
GND
GND
IN
IN
GND
IN
GND
IN
Figure 54. Difference Amplifier, Gain = 2, Referenced to Midsupply
Pin 2 (VIN−)
IN−
OUT
IN
OUT
GND
OUT
GND
GND
OUT
OUT
V
+IN
–IN
OUT
Figure 56. Noninverting Amplifier, Gain = 1.5
Figure 57. Noninverting Amplifier, Gain = 2
Figure 55. Inverting Amplifier, Gain = −½
V
IN
V
= 2 (V
IN
V
OUT
OUT
IN
5
1
OUT
20kΩ
20kΩ
1
= 1.5V
= 2V
2
3
IN+
= –½V
5
1
2
1
3
AD8278
40kΩ
40kΩ
20kΩ
20kΩ
20kΩ
− V
IN
40kΩ
40kΩ
20kΩ
IN
IN
IN−
AD8278
Pin 3 (VIN+)
IN+
GND
GND
GND
IN
IN
IN
GND
IN
GND
) + V
AD8278
40kΩ
40kΩ
AD8278
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