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| 型号： | TDA8754HL/21/C1 |
| 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： | 20 X 20 MM, 1.40 MM HEIGHT, LEAD FREE, PLASTIC, MS-026, SOT486-1, LQFP-144 |
| 文件页数： | 17/57页 |
| 文件大小： | 259K |
| 代理商： | TDA8754HL/21/C1 |
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TDA8754_7
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 07 — 3 May 2007
24 of 57
NXP Semiconductors
TDA8754
Triple 8-bit video ADC up to 270 Msample/s
9.3 Offset registers (R, G and B)
The offset registers contain a 9-bit value which controls the clamp level for the RGB
channels. The 8 LSBs are in the offset registers and the 1 MSB is in the coarse gain
control register. The relationship between the programming code and the level of the
clamp code is given in Table 19. The reset value is: clamp code = 0 and ADC output = 0.
Table 17.
Offset registers (00h, 03h, 06h) bit allocation
Register
7
6
5
4
3
2
1
0
OFFSETR (00h)
OR7
OR6
OR5
OR4
OR3
OR2
OR1
OR0
OFFSETG (03h)
OG7
OG6
OG5
OG4
OG3
OG2
OG1
OG0
OFFSETB (06h)
OB7
OB6
OB5
OB4
OB3
OB2
OB1
OB0
Reset
00000000
Table 18.
Offset registers (00h, 03h, 06h) bit description
Bit
Symbol
Description
OFFSETR (address: 00h)
7 to 0
OR[7:0]
offset R channel; LSB in this register and MSB bit OR8 in register
COARSER
OFFSETG (address: 03h)
7 to 0
OG[7:0]
offset G channel; LSB in this register and MSB bit OG8 in register
COARSEG
OFFSETB (address: 06h)
7 to 0
OB[7:0]
offset B channel; LSB in this register and MSB bit OB8 in register
COARSEB
Table 19.
Coding for clamp level and ADC output
Value
OR8 OR7 OR6 OR5 OR5 OR3 OR2 OR1 OR0 Clamp
code
(decimal)
ADC output
(code transition)
OG8 OG7 OG6 OG5 OG4 OG3 OG2 OG1 OG0
OB8 OB7 OB6 OB5 OB4 OB3 OB2 OB1 OB0
1E9h
1
0
1
0
24
24/23
1EAh
1
0
1
0
1
23
23/22
::
:
1FFh
1
1/0
000h
0
0/1
001h
0
1
+1
1/2
::
:
03Fh
0
1
63
63/64
040h
0
1
0
64
64/65
::
:
078h
0
1
0
120
120/121
079h
0
1
0
1
121
121/122
::
:
080h
0
1
0
128
128/129
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| TDA8754HL27BE-S | 功能描述:视频模拟/数字化转换器集成电路 3X8 BIT VIDEO A/D-270 MSPS RoHS:否 制造商:Texas Instruments 输入信号类型:Differential 转换器数量:1 ADC 输入端数量:4 转换速率:3 Gbps 分辨率:8 bit 结构: 输入电压:3.3 V 接口类型:SPI 信噪比: 电压参考: 电源电压-最大:3.45 V 电源电压-最小:3.15 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:TCSP-48 封装:Reel |
| TDA8755 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:YUV 8-bit video low-power analog-to-digital interface |
| TDA8755T | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:YUV 8-bit video low-power analog-to-digital interface |
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