TI-THS7327.pdf资源-CSDN文库

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TI-THS7327是一款高性能的3通道视频缓冲器，专为专业视频系统设计。该器件由新型互补硅锗（SiGe）BiCom-III工艺制造，具有2.7伏至5伏的单电源供电能力，适用于CVBS、S-Video、SD/ED/HD Y'P'BP'R、G'B'R'和R'G'B'等不同视频格式。THS7327的主要特性包括： 1. **rail-to-rail输出**：输出电压可以在电源轨的0.1伏范围内摆动，确保了高效率的信号传输。 2. **3个视频放大器**：每个通道都配备了一个视频放大器，支持AC或DC输出耦合，适应不同类型的视频信号处理需求。 3. **可选低通滤波器**：在ADC缓冲器上集成了5阶巴特沃斯低通滤波器，可选择9MHz、16MHz、35MHz和75MHz四种截止频率，以及旁路模式。这些滤波器能够有效地防止信号混叠，并针对不同视频标准优化性能。 4. **2:1输入多路复用器**：允许用户选择两个输入中的一个进行信号处理，增强了系统的灵活性。 5. **HV同步路径**：具有可调的施密特触发器，可以处理HV同步信号，确保同步信号的稳定传输。 6. **I2C控制**：所有功能可通过I2C接口进行编程，简化了系统集成和配置。 7. **可选输入偏置模式**：包括AC耦合带同步尖峰钳位、AC耦合无偏置以及DC耦合带偏移移位，以适应不同的输入信号特性。 8. **监视器直通功能**：此功能可以直接通过输入信号，不加任何过滤，保持信号的原始特性。 9. **高带宽和快速上升时间**：500MHz的带宽和1300 V/μs的上升时间，确保了高速信号的准确处理。 10. **SAG校正**：6dB增益带有SAG校正能力，有助于补偿视频信号的幅度损失。 11. **高输出阻抗的禁用状态**：在禁用状态下，输出阻抗高，减少对系统其他部分的影响。 12. **低功耗**：设计考虑了低功耗，适合便携式或节能应用。 THS7327广泛应用于投影仪、专业视频系统，如LCD、DLP和LCOS显示器的输入缓冲。其滤波器频率选择性使得它能够适应从标清到高清再到超高清的各种分辨率信号，如SDTV、EDTV、HDTV以及各种计算机显示标准。RoHS兼容的TQFP封装使其易于在电路板上安装和集成。总体来说，TI-THS7327是视频处理领域的一个强大工具，能够提供高保真、灵活的视频信号处理解决方案。

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3.3V

2:1

Input1

0.1 Fm

75 W

In A

InB

Input2

75 W

ADC

9/16/35/

75MHz

LPF

Sync

TIP

Clamp

+Offset

Bypass

AC-

BIAS

1kW 878 W

675 W

150 W

Out

SAG

47 Fm

33 Fm

75 W

Monitor

Output

SDA

SCL

Disable

= OPEN

THS7327

www.ti.com

SLOS502C –SEPTEMBER 2006–REVISED OCTOBER 2011

3-Channel RGBHV Video Buffer with I

C Control, Selectable Filters, Monitor Pass-Thru,

2:1 Input MUX, and Selectable Input Bias Modes

Check for Samples: THS7327

FEATURES

• Rail-to-Rail Output:

– Output Swings Within 0.1 V From the Rails

2345

• 3-Video Amplifiers for CVBS, S-Video,

Which Allows AC or DC Output Coupling

SD/ED/HD Y'P'

, G'B'R', and R'G'B' Video

• RoHS TQFP Package

• HV Sync Paths With Adj. Schmitt Trigger

• 2:1 Input MUX

APPLICATIONS

• I

C™ Control of All Functions

• Projectors

• Integrated Low-Pass Filters on ADC Buffers

• Professional Video Systems

– 5

Order Butterworth Characteristics

• LCD/DLP/LOCS Input Buffering

– Selectable Corner Frequencies of 9-MHz,

16-MHz, 35-MHz, and 75-MHz with Bypass

DESCRIPTION

(500-MHz)

Fabricated using the new complementary

• Selectable Input Bias Modes:

silicon-germanium (SiGe) BiCom-III process, the

– AC-Coupled with Sync-Tip Clamp

THS7327 is a low-power, single-supply 2.7-V to 5-V,

3-channel integrated video buffer with H and V Sync

– AC-Coupled with Bias

signal paths. It incorporates a selectable 5th order

– DC-Coupled with Offset Shift

Butterworth anti-aliasing filter on each channel. The

– DC-Coupled

9-MHz is a perfect choice for SDTV video including

composite, S-Video™, and 480i/576i. The 16-MHz

• Monitor Pass-Thru Function:

filter is ideal for EDTV 480p/576p and VGA signals.

– Passes the Input Signal With no Filtering

The 35-MHz filter is useful for HDTV 720p/1080i and

– 500-MHz BW and 1300 V/μs Slew Rate

SVGA signals. The 75-MHz filter is ideal for HDTV

– 6-dB Gain With SAG Correction Capable 1080p and XGA/SXGA signals. For UXGA/QXGA

R’G’B’ signals, the filter can be bypassed allowing a

– High Output Impedance in Disable State

500-MHz bandwidth, 1150-V/μs amplifier to buffer the

• 2.7-V to 5-V Single Supply Operation

signal.

• Low 330 mW at 3.3-V Power Consumption

• Disable Function Reduces Current to < 1 μA

Figure 1. 3.3 V Single-Supply AC-Input/AC-Video Output System w/SAG Correction

(1 of 3 Channels Shown)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2PowerPAD is a trademark of Texas Instruments.

3S-Video is a trademark of its respective owner.

C is a trademark of Philips Electronics.

5All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

THS7327

SLOS502C –SEPTEMBER 2006– REVISED OCTOBER 2011

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

DESCRIPTION (CONTINUED)

Each channel of the THS7327 is individually I

C configurable for all functions including controlling the 2:1 input

MUX. Its rail-to-rail output stage allows for both ac and dc coupling applications. The monitor pass-thru path

allows for passing the input signal, with no filtering, on to other systems. This path has a 6-dB Gain, 500-MHz

bandwidth, 1300V/μs slew rate, SAG correction capability, and a high output impedance while disabled to add to

the flexibility of the THS7327.

As part of the THS7327 flexibility, the input can be selected for ac or dc coupled inputs. The ac-coupled modes

include a sync-tip clamp option for CVBS/Y’/G’B’R’ with sync or a fixed bias for the C’/P’

/P’

/R’G’B’ channels

without sync. The dc input options include a dc input or a dc+Offset shift to allow for a full sync dynamic range at

the output with 0-V input.

The THS7327 is available in a RoHS-compliant TQFP package.

PACKAGING/ORDERING INFORMATION

(1)

PACKAGED DEVICES PACKAGE TYPE TRANSPORT MEDIA, QUANTITY

THS7327PHP Tray, 250

HTQFP-48 PowerPAD™

THS7327PHPR Tape and reel, 1000

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

ABSOLUTE MAXIMUM RATINGS

(1)

Over operating free-air temperature range (unless otherwise noted).

THS7327 UNIT

Supply voltage, GND to V

or GND to V

5.5 V

Input voltage –0.4 to V

or V

Output current ±100 mA

Continuous power dissipation See Dissipation Rating Table

Maximum junction temperature, any condition

(2)

+150 °C

Maximum junction temperature, continuous operation, long term reliability

(3)

+125 °C

stg

Storage temperature range –65 to +150 °C

HBM 1500 V

ESD ratings CDM 1500 V

MM 100 V

(1) Stresses above those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied Exposure to absolute maximum rated conditions for extended periods may degrade device reliability.

(2) The absolute maximum junction temperature under any condition is limited by the constraints of the silicon process.

(3) The absolute maximum junction temperature for continuous operation is limited by the package constraints. Operation above this

temperature may result in reduced reliability and/or lifetime of the device.

THS7327

SLOS502C –SEPTEMBER 2006– REVISED OCTOBER 2011

www.ti.com

ELECTRICAL CHARACTERISTICS, V

= V

= 3.3 V

= 150 Ω || 5 pF to GND for monitor output, 19 kΩ || 8 pF load to GND for ADC buffer, ADC buffer filter = 9 MHz, and SAG

pin shorted to monitor output pin (unless otherwise noted).

TYP OVER TEMPERATURE

PARAMETER TEST CONDITIONS

0°C to –40°C to MIN/MAX/

+25°C +25°C UNITS

+70°C +85°C TYP

AC PERFORMANCE

Filter select = 9 MHz

(1)

9 7/10.4 6.9/10.5 6.8/10.5 MHz Min/Max

Filter select = 16 MHz

(1)

16 13.1/9.6 12.9/19.7 12.8/19.7 MHz Min/Max

Buffer output

Filter select = 35 MHz

(1)

35 28/40.5 27.8/41.3 27.7/41.3 MHz Min/Max

Small-signal bandwidth

= 0.2 V

(–3 dB)

Filter select = 75 MHz

(1)

75 61/86.8 60.5/90.3 60.4/90.3 MHz Min/Max

Filter select = bypass 500 MHz Typ

Monitor output 450 MHz Typ

Filter select = 9 MHz 9 MHz Typ

Filter select = 16 MHz 16 MHz Typ

Buffer output

Filter select = 35 MHz 35 MHz Typ

Large-signal bandwidth

= 1 V

(–3 dB)

Filter select = 75 MHz 75 MHz Typ

Filter select = bypass 500 MHz Typ

Monitor output V

= 2 V

300 MHz Typ

Buffer output Filter select = bypass: V

= 1 V

1050 V/μs Typ

Slew rate

Monitor output V

= 2 V

1050 V/μs Typ

Filter select = 9 MHz 56 ns Typ

Filter select = 16 MHz 31 ns Typ

Buffer output Filter select = 35 MHz 16 ns Typ

Group delay at 100 kHz

Filter select = 75 MHz 8 ns Typ

Filter select = bypass 1.3 ns Typ

Monitor output 1.3 ns Typ

Filter select = 9 MHz: at 5.1 MHz 10.5 ns Typ

Filter select = 16 MHz: at 11 MHz 7.2 ns Typ

Group delay variation

Buffer output

with respect to 100 kHz

Filter select = 35 MHz: at 27 MHz 4 ns Typ

Filter select = 75 MHz: at 54 MHz 2 ns Typ

Filter select = 9 MHz: at 5.75 MHz 0.4 –0.3/1.5 –0.35/1.55 –0.4/1.6 dB Min/Max

Filter select = 9 MHz: at 27 MHz 39 31 30.5 30 dB Min

Filter select = 16 MHz: at 11 MHz 0.5 –0.3/1.5 –0.35/1.55 –0.4/1.6 dB Min/Max

Filter select = 16 MHz: at 54 MHz 40 32 31.5 31 dB Min

Attenuation with respect

Buffer output

to 100 kHz

Filter select = 35 MHz: at 27 MHz 1 –0.3/2.7 -0.35/2.75 –0.4/2.8 dB Min/Max

Filter select = 35 MHz: at 74 MHz 27 19 18.5 18 dB Min

Filter select = 75 MHz: at 54 MHz 0.6 –0.3/1.8 –0.4/1.9 –0.45/2 dB Min/Max

Filter select = 75 MHz: at 148 MHz 25 17 16.5 16 dB Min

Buffer output Filter select = 9 MHz: NTSC/PAL 0.3/0.45 % Typ

Differential gain

Monitor output NTSC/PAL 0.07/0.08 % Typ

Buffer output Filter select = 9 MHz: NTSC/PAL 0.45/0.5 ° Typ

Differential phase

Monitor output NTSC/PAL 0.07/0.08 ° Typ

Filter select = 9 MHz –61 dB Typ

Filter select = 16 MHz –60 dB Typ

Buffer output

Total harmonic

Filter select = 35 MHz –57 dB Typ

= 1 V

distortion

Filter select = 75 MHz –55 dB Typ

f = 1 MHz

Filter select = bypass –60 dB Typ

Monitor output V

= 2 V

–60 dB Typ

Filter select = 9 MHz 80 dB Typ

Filter select = 16 MHz 77 dB Typ

Buffer output Filter select = 35 MHz 75 dB Typ

Signal to noise ratio

(unified weighting)

Filter select = 75 MHz 73 dB Typ

Filter select = bypass

(2)

66 dB Typ

Monitor output See

(2)

71 dB Typ

(1) Min/Max values listed are specified by design only.

(2) Bandwidth up to 100-MHz, no weighting, tilt null.

THS7327

www.ti.com

SLOS502C –SEPTEMBER 2006–REVISED OCTOBER 2011

ELECTRICAL CHARACTERISTICS, V

= V

= 3.3 V (continued)

= 150 Ω || 5 pF to GND for monitor output, 19 kΩ || 8 pF load to GND for ADC buffer, ADC buffer filter = 9 MHz, and SAG

pin shorted to monitor output pin (unless otherwise noted).

TYP OVER TEMPERATURE

PARAMETER TEST CONDITIONS

0°C to –40°C to MIN/MAX/

+25°C +25°C UNITS

+70°C +85°C TYP

AC PERFORMANCE (continued)

Filter select = 9 MHz: at 5 MHz –58 dB Typ

Filter select = 16 MHz: at 10 MHz –65 dB Typ

Buffer output Filter select = 35 MHz: at 27 MHz –58 dB Typ

Channel-to-channel

crosstalk

Filter select = 75 MHz: at 60 MHz –58 dB Typ

Filter select = bypass: at 100 MHz –47 dB Typ

Monitor output F = 100 MHz –35 dB Typ

Filter select = 9 MHz: at 5.5 MHz 65 dB Typ

Filter select = 16 MHz: at 11 MHz 65 dB Typ

Buffer output

MUX isolation Filter select = 35 MHz: at 27 MHz 65 dB Typ

Filter select = bypass: at 60 MHz 65 dB Typ

Monitor output f = 100 MHz 66 dB Typ

Buffer output f = 100 kHz; V

= 1 V

0 dB Typ

Gain

Monitor output f = 100 kHz; V

= 2 V

6 5.8/6.25 5.75/6.3 5.75/6.35 dB Min/Max

Buffer output 6 ns Typ

Settling time V

= 1 V

; 0.5% Settling

Monitor output 6 ns Typ

Buffer output f = 10 MHz 2 Ω Typ

Output impedance

Monitor output f = 10 MHz 0.4 Ω Typ

DC PERFORMANCE

Buffer output Bias = dc, filter = 16 MHz 65 130 135 135 mV Max

Output offset voltage

Monitor output Bias = dc 20 90 95 95 mV Max

Buffer output Bias = dc 20 μV/°C Typ

Average offset voltage

drift

Monitor output Bias = dc 20 μV/°C Typ

Bias = dc + shift, V

= 0 V 340 260/430 250/440 240/450 mV Min/Max

Buffer output

Bias = ac-bias 1.1 0.95/1.25 0.9/1.3 0.9/1.3 V Min/Max

Bias output voltage

Bias = dc + Shift, V

= 0 V 230 160/350 155/370 150/375 mV Min/Max

Monitor output

Bias = ac-bias 1.7 1.55/1.85 1.5/1.9 1.5/1.9 V Min/Max

Buffer output 345 260/500 255/505 250/510 mV Min/Max

Sync tip clamp voltage Bias = ac STC, clamp voltage

Monitor output 305 210/400 205/405 200/410 mV Min/Max

Input bias current Bias = dc – implies Ib out of the pin –1.4 –3 –3.5 –3.5 μA Max

Average bias current drift Bias = dc 10 nA/°C Typ

Bias = ac STC, low bias 2.3 0.9/3.5 0.8/3.7 0.7/3.8 μA Min/Max

Sync tip clamp bias current Bias = ac STC, mid bias 5.9 4.2/8 4/8.2 3.9/8.3 μA Min/Max

Bias = ac STC, high bias 8.2 6.1/10.8 6/1 5.9/11.1 μA Min/Max

INPUT CHARACTERISTICS

Input voltage range Bias = dc 0/1.8 V Typ

Bias = ac-bias mode 25 kΩ Typ

Input resistance

Bias = dc, dc + shift, ac STC 3 MΩ Typ

Input capacitance 1.5 pF Typ

OUTPUT CHARACTERISTICS – MONITOR OUTPUT

= 150 Ω to 1.65 V 3.15 2.9 2.8 2.8 V Min

= 150 Ω to GND 3.05 2.85 2.75 2.75 V Min

High output voltage swing

= 75 Ω to 1.65 V 3.05 V Min

= 75 Ω to GND 2.9 V Min

= 150 Ω to 1.65 V 0.15 0.25 0.28 0.29 V Min

= 150 Ω to GND 0.1 0.18 0.21 0.22 V Min

Low output voltage swing

= 75 Ω to 1.65 V 0.25 V Min

= 75 Ω to GND 0.08 V Min

Sourcing R

= 10 Ω to 1.65 V 80 50 47 45 mA Min

Output current

Sinking R

= 10 Ω to 1.65 V 75 50 47 45 mA Min

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