SN10501DBVR datasheet(13/32 Pages) NSC

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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

−

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

APPLICATION CIRCUITS

Active Filtering With the SN1050x

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

49.9

Ω

Ω Source

1.3 k

Ω

4.7 pF

5 V

−5 V

33 pF

1.3 k

Ω

52.3

Ω

Driving Capacitive Loads

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

SN10501

SN10502

SN10503

www.ti.com .................................................................................................................................................. SLOS408B – MARCH 2003 – REVISED JANUARY 2009

Figure 41. AC-Coupled Input and Output

Figure 44. Inverting AC-Coupled Wide Output

Single-Supply Video Amplifier

Swing Single-Supply Video Amplifier

To further increase dynamic range at the output, the

output dc bias should be centered around 2.5 V for

the 5-V system shown. However, a wide output range

requires a wide input range, and should be centered

around 2.5 V. The best ways to accomplish this are

High-frequency active filtering with the SN1050x is

to ac-couple the gain resistor or bias it at 2.5 V with a

achievable due to the amplifier's high slew rate, wide

reference

supply

shown

Figure

and

bandwidth,

and

voltage

feedback

architecture.

Figure 43.

Several options are available for high-pass, low-pass,

bandpass, and bandstop filters of varying orders. A

simple two-pole, low-pass filter is presented in

Figure 45 as an example, with two poles at 25 MHz.

Figure 42. AC-Coupled Wide Output Swing

Single-Supply Video Amplifier

Figure 45. A Two-Pole Active Filter With Two

Poles Between 90 MHz and 100 MHz

A demanding, yet very common application for an op

amp is capacitive loading. Often, this load is the input

of an A/D converter, including additional external

capacitance, sometimes recommended to improve

A/D linearity. A high-speed, high open-loop gain

Figure 43. AC-Coupled Wide Output Swing

amplifier like the SN1050x can be very susceptible to

Single-Supply Video Amplifier Using Voltage

decreased stability and closed-loop response peaking

Reference

when a capacitive load is placed directly on the

output pin. When the amplifier's open-loop output

resistance is considered, the capacitance introduces

Another beneficial configuration is to use the amplifier

an additional pole in the signal path that can

in an inverting configuration as shown in Figure 44.

decrease the phase margin. When the primary

considerations

are

frequency-response

flatness,

pulse response fidelity, or distortion, the simplest and

most effective solution is to isolate the capacitive load

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