THS7360 datasheet(22/43 Pages) TI

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THS7360

SLOS674 – JUNE 2010

www.ti.com

APPLICATION INFORMATION

•

All

outputs

can

drive

two

video

lines

with

The THS7360 is targeted for six-channel video output

dc-coupling or traditional ac-coupling

applications that require three standard-definition

•

Flow-through configuration using a TSSOP-20

(SD) video output buffers and three selectable filter

package that complies with the latest lead-free

(SF) output buffers. Although it can be used for

(RoHS-compatible)

and

green

manufacturing

numerous

other

applications,

the

needs

and

requirements

requirements of the video signal are the most

important design parameters of the THS7360. Built

OPERATING VOLTAGE

the

revolutionary,

complementary

Silicon

Germanium (SiGe) BiCom3X process, the THS7360

The THS7360 is designed to operate from 2.7 V to

incorporates many features not typically found in

5 V over the –40°C to +85°C temperature range. The

integrated video parts while consuming very low

impact on performance over the entire temperature

power. The THS7360 includes the following features:

range is negligible as a result of the implementation

•

Single-supply 2.7-V to 5-V operation with low total

of thin film resistors and high-quality, low-temperature

quiescent current of 24.5 mA at 3.3 V and

coefficient capacitors. The design of the THS7360

25.5 mA at 5 V

allows

operation

down

2.6

but

recommended to use at least a 3-V supply to ensure

•

Disable mode allows for shutting down individual

that no issues arise with headroom or clipping with

SD/SF blocks of amplifiers to save system power

100% color-saturated CVBS signals. If only 75% color

in power-sensitive applications

saturated CVBS is supported, then the output voltage

•

Input configuration accepts dc + level shift, ac

requirements are reduced to 2 VPP on the output,

sync-tip clamp, or ac-bias

allowing a 2.7-V supply to be utilized without issues.

–

AC-biasing is allowed with the use of external

A 0.1-mF to 0.01-mF capacitor should be placed as

pull-up resistors to the positive power supply

close as possible to the power-supply pins. Failure to

•

Sixth-order, low-pass filter for DAC reconstruction

do so may result in the THS7360 outputs ringing or

or ADC image rejection:

oscillating. Additionally, a large capacitor (such as

–

9.5 MHz for NTSC, PAL, SECAM, composite

22 mF to 100 mF) should be placed on the

video

(CVBS),

S-Video

Y’/C’,

480i/576i,

power-supply

line

minimize

interference

with

Y’/P’B/P’R, and G’B’R’ (R’G’B’) signals

50-/60-Hz line frequencies.

–

Selectable

9.2-MHz/17-MHz/35-MHz/70-MHz

for

480i/576i,

480p/576p,

INPUT VOLTAGE

720p/1080i/1080p24/1080p30,

1080p60

The THS7360 input range allows for an input signal

Y’/P’ B/P’R or G’B’R’ signals; also allows up to

range from –0.2 V to approximately (VS+ – 1.5 V).

QXGA (1600 × 1200 at 60 Hz) R'G'B' video

However, because of the internal fixed gain of

•

Individually-controlled Bypass mode bypasses the

5.6 V/V (+15 dB) on the SD channels or 4.5 V/V

low-pass filters for each SD/SF block of amplifiers

(+13.1dB) and the internal input level shift of 120 mV

–

bypass

mode

features

60-MHz

and

(typical), the output is generally the limiting factor for

150-V/ms performance

the allowable linear input range. For example, with a

–

bypass

mode

features

280-MHz

and

5-V supply, the linear input range is from –0.2 V to

800-V/ms performance

3.5 V. However, because of the gain and level shift,

•

Individually-controlled Disable mode shuts down

the linear output range limits the allowable linear

all amplifiers in each SD/SF block to reduce

input range to approximately –0.08 V to 0.8 V.

quiescent current to 0.1 mA

•

Internally-fixed gain of 5.6-V/V (+15-dB) for SD

channels or 4.5-V/V (+13.1-dB) for SF channels

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