AS1710A AMSCO [austriamicrosystems AG], AS1710A Datasheet - Page 12

• Manufacturer Part Number: AS1710A
• Description: High-Output-Drive, 10MHz, 10V/?s, Rail-to-Rail I/O Op Amps with Shutdown
• Manufacturer: AMSCO [austriamicrosystems AG]

AS1710/AS1712
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Driving Capacitive Loads
The AS1710/AS1712 amplifiers have a high tolerance for capacitive loads, and are stable with capacitive loads up to
100pF.
Figure 26
Figure 26. Capacitive-Load Driving Circuit
Note: Resistor R
Power-Up
The AS1710/AS1712 typically settle within 5µs after power-up.
Shutdown
When SHDNN (not included in B versions) is pulled low, supply current drops to 0.5µA (per amplifier, V
amplifiers are disabled, and their outputs are driven to V
down, any pullup resistor on the output causes a current drain from the supply.
Note: Pulling SHDNN high enables the amplifier. In the AS1712 the amplifiers shutdown in pairs.
When exiting shutdown, there is a 6µs delay before the amplifier output becomes active.
Power Supplies and Layout
The AS1710/AS1712 can operate from a single 2.7 to 5.5V supply or from dual ±1.35 to ±2.5V supplies. Good design
improves device performance by decreasing the amount of stray capacitance at the op amp inputs/outputs.
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For single-supply operation, bypass the power supply with a 0.1µF ceramic capacitor.
For dual-supply operation, bypass each supply to ground.
Decrease stray capacitance by placing external components close to the op amp pins, minimizing trace and lead
lengths.
put.
shows a typical non-inverting capacitive-load driving circuit in the unity-gain configuration.
ISO
improves the circuit’s phase margin by isolating the load capacitor from the AS1710/AS1712 out-
–
+
AS1710
Revision 1.04
SS
. Because the outputs are actively driven to V
R
ISO
C
F
DD
SS
= 2.7V), the
in shut-
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