HD49338F Renesas Electronics Corporation., HD49338F Datasheet - Page 11

• Manufacturer Part Number: HD49338F
• Description: Cds/pga & 12-bit A/d Converter
• Manufacturer: Renesas Electronics Corporation.

HD49338F/HF
7. Adjustment of Black-Level S/H Response Frequency Characteristics
Table 6
Table 7
Rev.2.00 May 20, 2005 page 9 of 22
8.
Note: Upper line
CR Time Constant (Typ)
(cutoff frequency conversion)
CR Time Constant (Typ)
(cutoff frequency conversion)
(Register setting)
The CR time constant that is used for sampling/hold (S/H) at the black level can be adjusted by changing the register
settings, as shown in table 6.
The SHAMP frequency characteristics can be adjusted by changing the register settings
and the C4 value of the external 31st pin.
The settings are shown in table 7.
Values other than those shown in the table 7 cannot be used.
Middle line
Lower line
LoPwr
"Lo"
"Hi"
SHSW CR Time Constant Setting
SHAMP Frequency Characteristics Setting
: SHAMP cutoff frequency (Typ)
: Standard value of C4 (maximum value is not defined)
: Minimum value of C4 (do not set below this value)
[0]
[0]
SHSW-fsel (Register setting)
2.20 nsec
(72 MHz)
SHSW-fsel (Register setting)
4.40 nsec
(36 MHz)
L
L
[0]
H
[1]
[1]
L
L
[2]
[2]
10000 pF
15000 pF
L
L
116 MHz
(270 pF)
(620 pF)
49 MHz
[3]
[3]
H
L
[0]
[0]
H
2.30 nsec
(69 MHz)
H
4.80 nsec
(33 MHz)
[1]
[1]
L
L
[2]
[2]
[1]
L
L
L
[3]
[3]
H
L
[0]
[0]
2.51 nsec
(63 MHz)
5.87 nsec
(27 MHz)
L
L
[1]
[1]
H
H
[2]
[2]
SHA-fsel (Register setting)
L
L
[3]
[3]
H
L
[0]
[0]
[0]
L
2.64 nsec
(60 MHz)
6.60 nsec
(24 MHz)
H
H
[1]
[1]
H
H
13000 pF
22000 pF
(300 pF)
(750 pF)
75 MHz
32 MHz
[2]
[2]
L
L
[3]
[3]
H
L
[0]
[0]
2.93 nsec
(54 MHz)
8.80 nsec
(18 MHz)
L
L
[1]
[1]
L
L
[1]
H
[2]
[2]
H
H
[3]
[3]
H
L
[0]
[0]
H
3.11 nsec
(51 MHz)
H
10.6 nsec
(15 MHz)
[1]
[1]
L
L
[2]
[2]
H
H
[3]
[3]
[0]
H
L
H
BLKC
[0]
[0]
3.52 nsec
(45 MHz)
17.6 nsec
(9 MHz)
L
L
31
18000 pF
27000 pF
(360 pF)
(820 pF)
56 MHz
24 MHz
[1]
[1]
H
H
C4
[2]
[2]
H
H
[3]
[3]
H
L
[0]
[0]
H
3.77 nsec
(42 MHz)
H
26.4 nsec
(6 MHz)
[1]
H
[1]
[1]
H
H
[2]
[2]
H
H
[3]
[3]
L
H