OPA353NASLASH3K datasheet(8/33 Pages) TI2

8 / 33 page

OPA353, 2353, 4353

APPLICATIONS INFORMATION

OPA353 series op amps are fabricated on a state-of-the-art

0.6 micron CMOS process. They are unity-gain stable and

suitable for a wide range of general purpose applications.

Rail-to-rail input/output make them ideal for driving sam-

pling A/D converters. They are well suited for controlling

the output power in cell phones. These applications often

require high speed and low noise. In addition, the OPA353

series offers a low cost solution for general purpose and

consumer video applications (75

Ω drive capability).

Excellent ac performance makes the OPA353 series well

suited for audio applications. Their bandwidth, slew rate,

low noise (5nV/

√Hz), low THD (0.0006%), and small pack-

age options are ideal for these applications. The class AB

output stage is capable of driving 600

Ω loads connected to

any point between V+ and ground.

Rail-to-rail input and output swing significantly increases

dynamic range, especially in low voltage supply applica-

tions. Figure 1 shows the input and output waveforms for

the OPA353 in unity-gain configuration. Operation is

from a single +5V supply with a 1k

Ω load connected to

VS /2. The input is a 5Vp-p sinusoid. Output voltage is

approximately 4.95Vp-p.

Power supply pins should be bypassed with 0.01

µF ceramic

capacitors.

OPERATING VOLTAGE

OPA353 series op amps are fully specified from +2.7V to

+5.5V. However, supply voltage may range from +2.5V to

+5.5V. Parameters are guaranteed over the specified supply

range—a unique feature of the OPA353 series. In addition,

many specifications apply from –40

°C to +85°C. Most

behavior remains virtually unchanged throughout the full

operating voltage range. Parameters which vary signifi-

cantly with operating voltages or temperature are shown in

the typical performance curves.

RAIL-TO-RAIL INPUT

The guaranteed input common-mode voltage range of the

OPA353 series extends 100mV beyond the supply rails. This

is achieved with a complementary input stage—an

N-channel input differential pair in parallel with a P-channel

differential pair (see Figure 2). The N-channel pair is active

for input voltages close to the positive rail, typically

(V+) – 1.8V to 100mV above the positive supply, while the

P-channel pair is on for inputs from 100mV below the

negative supply to approximately (V+) – 1.8V. There is a

small transition region, typically (V+) – 2V to (V+) – 1.6V, in

which both pairs are on. This 400mV transition region can

vary

±400mV with process variation. Thus, the transition

region (both input stages on) can range from (V+) – 2.4V to

(V+) – 2.0V on the low end, up to (V+) – 1.6V to (V+) – 1.2V

on the high end.

FIGURE 2. Simplified Schematic.

BIAS1

BIAS2

IN+

IN–

Class AB

Control

Circuitry

V–

(Ground)

V+

Reference

Current

VS = +5, G = +1, RL = 1kΩ

VIN

FIGURE 1. Rail-to-Rail Input and Output.

VOUT

OPA353NA/3K bảng dữ liệu(PDF) 8 Page - Texas Instruments

OPA353NA/3K bảng dữ liệu(HTML) 8 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

bảng dữ liệu tải về

Link URL