HD49338F Renesas Electronics Corporation., HD49338F Datasheet - Page 13

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

HD49338F/HF
Detailed Timing Specifications
Detailed Timing Specifications when CDSIN Input Mode is Used
Figure 3 shows the detailed timing specifications when the CDSIN input mode is used, and table 8 shows each timing
specification.
Table 8
No.
(1)
(2)
(3)
(4)
(5)
(6)
(7), (8)
(9)
(10)
Note:
OBP Detailed Timing Specifications
Figure 4 shows the OBP detailed timing specifications.
The OB period is from the fifth to the twelfth clock cycle after the OB pulse is input. The average of the black signal
level is taken for eight input cycles during the OB period and becomes the clamp level (DC standard).
Rev.2.00 May 20, 2005 page 11 of 22
1. SPBLK and SPSIG polarities when serial data Spinv bit is set to low.
Timing
Black-level signal fetch time
SPBLK low period *
Signal-level fetch time
SPSIG low period *
SPBLK rising to SPSIG rising time *
SPBLK rising to ADCLK rising inhibition time *
ADCLK t
ADCLK rising to digital output hold time
ADCLK rising to digital output delay time
Timing Specifications when the CDSIN Input Mode is Used
CDSIN
OBP
Note:
WH
min./t
1. Shifts 1 clock cycle depending on the OBP input timing.
Note:
Figure 3 Detailed Timing Chart when CDSIN Input Mode is Used
1. When serial data Spinv bit is set to low. (When the Spinv bit is set to high, the polarities
WL
CDSIN
SPBLK
SPSIG
ADCLK
D0 to D11
of the SPBLK and the SPSIG are inverted.)
1
1
min.
N
OB pulse > 2 clock cycles
When serial data OBPinv bit is set to low
(When the OBPinv is set to high, the polarity of the OBP is inverted.)
Figure 4 OBP Detailed Timing Specifications
N+1
1
(2)
Black
level
(7)
(1)
This edge is used, when OBP pulse-width period is clamp-on.
OB period *
(5)
(6)
1
Signal
level
(4)
Symbol
t
t
t
t
t
t
t
t
t
CDS1
CDS2
CDS3
CDS4
CDS5
CDS6
CDS7, 8
CHLD9
COD10
(8)
N+5
(3)
1
Min
—
Typ × 0.8
—
Typ × 0.8
Typ × 0.85
1
11
3
—
(9)
(10)
N+12
(1.5)
1/4f
(1.5)
1/4f
1/2f
5
—
7
Typ
16
Vth
Vth
Vth
CLK
CLK
CLK
× 0.90
N+13
Max
—
Typ × 1.2
—
Typ × 1.2
Typ × 1.00
9
—
—
24
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns