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| 型号： | TDA8757AHL/21 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | ADC |
| 英文描述： | 3-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP144 |
| 封装： | PLASTIC, HLQFP-144 |
| 文件页数： | 4/37页 |
| 文件大小： | 908K |
| 代理商： | TDA8757AHL/21 |
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Philips Semiconductors
TDA8757A
Triple 8-bit ADC 205 Msps
Preliminary data
Rev. 01 — 22 March 2002
12 of 37
9397 750 09549
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
If this function is not used, pin INSOG should be connected to the analog power
supply. In this event pin SOGO is at LOW-level TTL.
8.2 Clamps
Three independent parallel clamping circuits are used to clamp the video input
signals on several black levels. The clamping levels may be set from
63.5 to +64 LSBs (RGB) and from +120 to +136 LSBs in steps of 1
2 LSB (YUV).
They are controlled by changing the values in three 8-bit registers: OFFSETR,
OFFSETG and OFFSETB (see Table 5). Each clamp must be able to correct an
offset from
±100 mV to ±10 mV within 300 ns, and correct the total offset in 10 lines.
The clamping is done using the following principle: On the incoming of a TTL positive
going pulse supplied on pin CLP, three external capacitors are loaded independently
by the device in order to change the voltage level of each analog RGB input. The
capacitors are connected to pins CLPR, CLPG and CLPB.
Fig 5.
Sync level diagram.
blank level
150 mV comparison level
set by I2C-bus bit Slevel = 0
blank level
80 mV comparison level
set by I2C-bus bit Slevel = 1
150 mV
to
300 mV
to
600 mV
005aaa009
Fig 6.
Clamp denition.
video signal
CLP
Clamp
=
+128
Clamp
=
+64
Clamp
=
63.5
Clamp
= 0
0
constant level
255
constant level
FCE698
clamp
programming
ADC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8757HL | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Triple 8-bit ADC 170 Msps |
| TDA8758 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:YC 8-bit low-power analog-to-digital video interface |
| TDA8758G | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:YC 8-bit low-power analog-to-digital video interface |
| TDA8759HV/8/C1 | 功能描述:模数转换器 - ADC 3X8-BITS VIDEO ADC 110MSPS RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TDA8759HV/8/C1,551 | 功能描述:模数转换器 - ADC 3X8-BITS VIDEO RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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