TI-THS7347：低功耗视频缓冲器带I2C控制与特性

需积分: 10 140 浏览量更新于2024-06-28 4 收藏 833KB PDF 举报

TI-THS7347是一款专为视频信号处理设计的高性能集成器件，它是一款3通道RGBHV视频缓冲器，具备I2C控制功能，适用于各种视频应用领域，包括但不限于CVBS（复合视频），S-Video，EDTV，HDTV以及专业视频系统。该器件的特点如下： 1. **电压兼容性**：THS7347工作在宽广的电源电压范围，从2.7V到5V，确保了设备在多种电源条件下都能稳定运行。 2. **功耗优化**：作为一款低功耗器件，它采用了革命性的互补金属氧化物半导体-锗（SiGe）BiCom3工艺，这使得它在提供高效能的同时，降低了能耗。 3. **高速性能**：拥有500 MHz的带宽和高达1200 V/μs的上升沿/下降沿斜率，确保了信号在高速传输时的准确性和完整性。 4. **I2C控制**：通过I2C接口，用户可以方便地控制每个通道的功能，提供了极大的灵活性和扩展性。 5. **输入多路复用**：2:1 输入Mux功能允许用户同时连接两个输入信号源，并灵活选择其中一个作为输出，提高了信号的选择性和系统效率。 6. **同步信号路径**：THS7347内含H和V同步信号路径，支持调整性的施密特触发，适应不同显示设备对同步信号的要求。 7. **模拟与数字转换器（ADC）支持**：内置的Unity-Gain Buffer Path有助于ADC的信号缓冲，保证了数字信号的准确处理。 8. **视频监控特性**：包括Monitor Pass-Through功能，允许从主输入到监视输出的直接信号传递，便于实时监测和调试。 9. **保护机制**：如Clamp、DC X1和DC +Offset等，确保了信号在极端条件下的稳健性和可靠性。 10. **接口选项**：带有SDA和SCL接口，用于I2C通信，同时还有Disable引脚和=OPEN功能，便于外部控制和状态指示。 11. **产品版本信息**：SLOS531B-MAY2007-REVISION OCTOBER2011，说明这是该产品的某个版本更新记录。 TI-THS7347是一款适用于多种视频应用的专业级视频缓冲器，集成了先进的I2C控制技术，为系统设计者提供了高性能、低功耗和易用性的解决方案。

THS7347

SLOS531B –MAY 2007– REVISED OCTOBER 2011

www.ti.com

ELECTRICAL CHARACTERISTICS, V

= V

= 5 V

= 150Ω || 5pF to GND for Monitor Output, 19kΩ || 8pF Load to GND for Buffer Output, SAG pin shorted to Monitor Output

Pin, unless otherwise noted.

TYP OVER TEMPERATURE

0°C to –40°C to MIN/MAX/

PARAMETER TEST CONDITIONS +25°C +25°C +70°C +85°C UNIT TYP

AC PERFORMANCE

Buffer output 550 MHz Typ

Small-signal

= 0.2 V

bandwidth (–3 dB)

Monitor output 500 MHz Typ

Buffer output 450 MHz Typ

–1 dB flatness V

= 0.2 V

Monitor output 400 MHz Typ

Buffer output V

= 1 V

525 MHz Typ

Large-signal

bandwidth (–3 dB)

Monitor output V

= 2 V

325 MHz Typ

Buffer output V

= 1 V

1200 V/μs Typ

Slew rate

Monitor output V

= 2 V

1350 V/μs Typ

Buffer output 1.15 ns Typ

Group delay at

100 kHz

Monitor output 1.15 ns Typ

Buffer output 0.05/0.05 % Typ

Differential gain NTSC/PAL

Monitor output 0.1/0.1 % Typ

Buffer output 0.05/0.05 degrees Typ

Differential phase NTSC/PAL

Monitor output 0.05/0.05 degrees Typ

Buffer output V

= 1 V

–71 dB Typ

Total harmonic

distortion f = 1 MHz

Monitor output V

= 2 V

–67 dB Typ

Buffer output 63 dB Typ

Signal-to-noise ratio No weighting, up to 100 MHz

Monitor output 65 dB Typ

Buffer output –40 dB Typ

Channel-to-channel

f = 100 MHz

crosstalk

Monitor output –36 dB Typ

Buffer output 64 dB Typ

MUX Isolation f = 100 MHz

Monitor output 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 0.3 Ω Typ

Output impedance f = 10 MHz

Monitor output 0.4 Ω Typ

DC PERFORMANCE

Buffer output 15 ±80 ±85 ±85 mV Max

Output offset voltage Bias = dc

Monitor output 20 ±120 ±125 ±125 mV Max

Buffer output 20 μV/°C Typ

Average offset

Bias = dc

voltage drift

Monitor output 20 μV/°C Typ

Bias = dc + shift, V

= 0 V 265 185/370 175/380 170/385 mV Min/Max

Buffer output

Bias = ac 1.5 1.3/1.65 1.25/1.7 1.25/1.7 V Min/Max

Bias output voltage

Bias = dc + shift, V

= 0 V 235 145/345 135/355 130/360 mV Min/Max

Monitor output

Bias = ac 2.65 2.5/2.8 2.45/2.85 2.45/2.85 V Min/Max

Buffer output 295 205/410 200/415 195/420 mV Min/Max

Sync tip clamp

Bias = ac STC, clamp voltage

voltage

Monitor output 300 200/400 195/405 190/410 mV Min/Max

Input bias current Bias = dc; (–) implies I

out of the pin –1.4 –3.0 –3.5 –3.5 μA Max

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

Bias = ac STC, low bias 2.4 0.9/3.9 0.8/4.0 0.7/4.1 μA Min/Max

Sync tip clamp bias current Bias = ac STC, mid bias 6.2 3.9/8.4 3.8/8.6 3.7/8.7 μA Min/Max

Bias = ac STC, high bias 8.6 6/11.2 5.8/11.4 5.7/11.5 μA Min/Max

THS7347

www.ti.com

SLOS531B –MAY 2007– REVISED OCTOBER 2011

ELECTRICAL CHARACTERISTICS, V

= V

= 5 V (continued)

= 150Ω || 5pF to GND for Monitor Output, 19kΩ || 8pF Load to GND for Buffer Output, SAG pin shorted to Monitor Output

Pin, unless otherwise noted.

TYP OVER TEMPERATURE

0°C to –40°C to MIN/MAX/

PARAMETER TEST CONDITIONS +25°C +25°C +70°C +85°C UNIT TYP

INPUT CHARACTERISTICS

Input voltage range Bias = dc 0 to 3.4 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 2.5 V 4.8 4.65 4.6 4.6 V Min

= 150 Ω to GND 4.7 4.55 4.5 4.5 V Min

High output voltage swing

= 75 Ω to 2.5 V 4.7 V Typ

= 75 Ω to GND 4.6 V Typ

= 150 Ω to 2.5 V 0.2 0.25 0.28 0.30 V Max

= 150 Ω to GND 0.1 0.19 0.23 0.24 V Max

Low output voltage swing

= 75 Ω to 2.5 V 0.24 V Typ

= 75 Ω to GND 0.085 V Typ

Sourcing 110 85 80 75 mA Min

Output current R

= 10 Ω to 2.5 V

Sinking 110 85 80 75 mA Min

OUTPUT CHARACTERISTICS: BUFFER OUTPUT

High output voltage swing

3.4 3.1 3.0 3.0 V Min

(Limited by input range and G = 0 dB)

Load = 19 kΩ ∥ 8 pF to 2.5 V

Low output voltage swing

0.05 0.12 0.13 0.14 V Max

(Limited by input range and G = 0 dB)

Sourcing R

= 10 Ω to GND 110 85 80 75 mA Min

Output current

Sinking R

= 10 Ω to 2.5 V 110 85 80 75 mA Min

POWER SUPPLY: ANALOG

Maximum operating voltage V

5.0 5.5 5.5 5.5 V Max

Minimum operating voltage V

5.0 2.7 2.7 2.7 V Min

Maximum quiescent current V

, dc + shift mode, V

= 100 mV 90 112 115 117 mA Max

Minimum quiescent current V

, dc + shift mode, V

= 100 mV 90 68 65 63 mA Min

Power supply rejection (+PSRR) Buffer Output 46 dB Typ

POWER SUPPLY: DIGITAL

Maximum operating voltage V

5.0 5.5 5.5 5.5 V Max

Minimum operating voltage V

5.0 2.7 2.7 2.7 V Min

Maximum quiescent current V

, V

= 0 V 1 2 3 3 mA Max

Minimum quiescent current V

, V

= 0 V 1 0.5 0.4 0.4 mA Min

DIGITAL CHARACTERISTICS

(1)

High level input voltage V

3.5 V Typ

Low level input voltage V

1.5 V Typ

DISABLE CHARACTERISTICS: ALL CHANNELS DISABLED

Quiescent current All channels disabled 1 μA Typ

Turn-on time delay (t

) 5 μs Typ

Time for l

to reach 50% of final value

after I

C control is initiated

Turn-on time delay (t

OFF

) 2 μs Typ

(1) Standard CMOS logic.

剩余31页未读，继续阅读

不觉明了

粉丝: 3888
资源: 5759

TI-THS7347：低功耗视频缓冲器带I2C控制与特性

TI-THS8135.pdf

TI-THS8200.pdf

TI-THS3215.pdf

TI-THS8136.pdf

TI-THS6032.pdf

TI-THS6182.pdf

TI-THS7374.pdf

TI-THS6226.pdf

TI-THS7327.pdf

TI-THS7373.pdf

最新资源