SN10501D datasheet(13/23 Pages) TI

13 / 23 page

SN10501

SN10502

SN10503

SLOS408A − MARCH 2003 − REVISED DECEMBER 2003

www.ti.com

−

Ω

1.24 k

Ω

1.24 k

Ω

5 V

Input Range

= 1 V to 2.25 V

Output Range

= 2 V to 4.5 V

VO Range

= 0 V to 1.25V

µF

1.24

Ω

µF

Figure 40. AC-Coupled SAG Corrected Output

Single-Supply Video Amplifier

Many times the output of the video encoder or DAC does

not have the capability to output the 1-V to 2.25-V range,

but rather a 0-V to 1.25-V range. In this instance, the signal

must be ac-coupled to the amplifier input as shown in

Figure 41. Note that it does not matter what the voltage

output of the DAC is, but rather the voltage swing should

be kept less than 1.25 VPP.

−

Ω

1.24 k

Ω

1.24 k

Ω

5 V

DAC Output

Input Range

VO Range

= 0 V to 1.25V

470

µF

= 0 V to 1.25V

5 V

µF

4.64 k

Ω

2.26 k

Ω

Output Range

= 2 V to 4.5 V

= 1 V to 2.25V

Figure 41. AC-Coupled Input and Output

Single-Supply Video Amplifier

To have even more dynamic range at the output, the

dc-bias at the output should be centered around 2.5 V for

the 5-V system shown. But, to have a wide output range

the input must also have a wide range and should be

centered around 2.5 V. The best ways to accomplish this

is to either ac-couple the gain resistor or bias it at 2.5 V

utilizing a reference supply as shown in Figure 42 and

Figure 43.

−

Ω

1.24 k

Ω

1.24 k

Ω

5 V

DAC Output

Input Range

VO Range

= 0 V to 2V

470

µF

= 0 V to 2V

5 V

µF

3.01 k

Ω

3.01 k

Ω

Output Range

= 1.5 V to 3.5V

= 0.5 V to 4.5V

µF

Figure 42. AC-Coupled Wide Output Swing

Single-Supply Video Amplifier

−

Ω

1.24 k

Ω

1.24 k

Ω

5 V

DAC Output

Input Range

VO Range

= 0 V to 2V

470

µF

= 0 V to 2V

5 V

µF

3.01 k

Ω

3.01 k

Ω

Output Range

= 1.5 V to 3.5V

= 0.5 V to 4.5V

2.5 V

Figure 43. AC-Coupled Wide Output Swing

Single-Supply Video Amplifier Utilizing Voltage

Reference

Another configuration that can be beneficial is to utilize the

amplifier in an inverting configuration is shown in

Figure 44.

−

Ω

2.49 k

Ω

1.24 k

Ω

5 V

DAC Output

Input = 2.5 V

VO Range

= 0 V to 2V

470

µF

= 0 V to 2V

5 V

10 k

Ω

10 k

Ω

Output Range

= 0.5 V to 4.5V

µF

Figure 44. Inverting AC-Coupled Wide Output

Swing Single-Supply Video Amplifier

SN10501D Datasheet(PDF) 13 Page - Texas Instruments

SN10501D Datasheet(HTML) 13 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

Datasheet Download

Link URL