EC5602

High Slew Rate Rail-to-Rail Dual Operational Amplifiers

Page 9 of 12

6A27N Rev. F002

1

The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total power

supply voltage, plus the power in the IC due to the loads, or:

When sourcing, and

When sinking.

Where:

each other.

Package

Θja

(℃/W)

Θjc

(℃/W)

MSOP-8

201

78

SOP-8(EXPOSED PAD)

60

16

TSSOP-8

230

69

Driving Capacitive Loads

The EC5602 is designed to drive a wide range of capacitive loads. In addition, the output current handling capability of

the device allows for good slewing characteristics even with large capacitive loads. The combination of these features

make the EC5602 ideally for applications such as TFT LCD panel grayscale reference voltage buffers, ADC input

amplifiers, etc.

As load capacitance increases, however, the -3dB bandwidth of the device will decrease and the peaking increase.

less peaking is desired in these applications, a small series resistor (usually between 5Ω

series with the output. However, this will obviously reduce the gain slightly. Another method of reducing peaking is to

add a "snubber" circuit at the output. A snubber is a shunt load consisting of a resistor in series with a capacitor. Values

of

performance while does not draw any DC load current or reduce the gain.

Power Supply Bypassing and Printed Circuit Board Layout

With high phase margin, the EC5602 performs stable gain at high frequency. Like any high-frequency device, good

layout of the printed circuit board usually comes with optimum performance. Ground plane construction is highly

recommended, lead lengths should be as short as possible and the power supply pins must be well bypassed to

then be connected in parallel, placed in the region of the amplifier. One 4.7µF capacitor may be used for multiple

devices. This same capacitor combination should be placed at each supply pin to ground if split supplies are to be

used.