AD8052AR Analog Devices Inc, AD8052AR Datasheet - Page 17

• Manufacturer Part Number: AD8052AR
• Description: IC OPAMP VF R-R DUAL LDIST 8SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD8052AR

• Slew Rate: 170 V/µs
• Mounting Type: Surface Mount
• Rohs Status: RoHS non-compliant
• Amplifier Type: Voltage Feedback
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• -3db Bandwidth: 110MHz
• Current - Input Bias: 1.4µA
• Voltage - Input Offset: 1800µV
• Current - Supply: 4.8mA
• Current - Output / Channel: 45mA
• Voltage - Supply, Single/dual (±): 3 V ~ 12 V, ±1.5 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 2
• Bandwidth: 110MHz
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Settling Time: 50ns
• Operating Temperature Max: 85°C
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATION INFORMATION
OVERDRIVE RECOVERY
Overdrive of an amplifier occurs when the output and/or input
range is exceeded. The amplifier must recover from this over-
drive condition. As shown in Figure 41, the AD8051/AD8052/
AD8054 recover within 60 ns from negative overdrive and
within 45 ns from positive overdrive.
DRIVING CAPACITIVE LOADS
Consider the AD8051/AD8052 in a closed-loop gain of +1 with
+V
and Figure 43 show their frequency and time domain responses,
respectively, to a small-signal excitation. The capacitive load
drive of the AD8051/AD8052/AD8054 can be increased by
adding a low value resistor in series with the load. Figure 44
and Figure 45 show the effect of a series resistor on the capaci-
tive drive for varying voltage gains. As the closed-loop gain is
increased, the larger phase margin allows for larger capacitive
loads with less peaking. Adding a series resistor with lower
closed-loop gains accomplishes the same effect. For large
capacitive loads, the frequency response of the amplifier is
dominated by the roll-off of the series resistor and the load
capacitance.
Figure 42. AD8051/AD8052 Closed-Loop Frequency Response; C
S
= 5 V and a load of 2 kΩ in parallel with 50 pF. Figure 42
–10
–12
–2
–4
–6
–8
8
6
4
2
0
0.1
V
G = +1
R
C
V
S
OUT
L
L
= 5V
= 2kΩ
= 50pF
V/DIV AS SHOWN
= 200mV p-p
INPUT 1V/DIV
Figure 41. Overdrive Recovery
1
FREQUENCY (MHz)
OUTPUT 2V/DIV
10
100ns
100
V
G = +5
R
R
S
F
L
= ±5V
= 2kΩ
= 2kΩ
500
L
= 50 pF
Rev. J | Page 17 of 24
Figure 44. AD8051/AD8052 Capacitive Load Drive vs. Closed-Loop Gain
10000
1000
1000
Figure 45. AD8054 Capacitive Load Drive vs. Closed-Loop Gain
100
2.60
2.55
2.50
2.45
2.40
Figure 43. AD8051/AD8052 200 mV Step Response; C
100
10
10
1
1
1
V
≤ 30%
OVERSHOOT
V
≤ 30%
OVERSHOOT
S
S
= 5V
= 5V
50mV
2
2
R
S
100mV
100mV
AD8051/AD8052/AD8054
STEP
= 10Ω
STEP
V
V
IN
3
IN
3
A
A
CL
R
CL
S
50Ω
R
50Ω
(V/V)
R
= 3Ω
G
(V/V)
G
R
4
S
4
R
= 0Ω
R
F
R
F
S
= 0Ω
R
100ns
R
S
S
V
G = +1
R
C
5
S
L
L
5
= 5V
= 2kΩ
= 50pF
C
C
L
L
L
= 50 pF
V
V
OUT
OUT
6
6