HD49343NPHNP_15 Datasheet, PDF (18/23 Pages) Renesas Technology Corp – CDS/PGA & 12-bit A/D Converter

HD49343NP/HNP
Preliminary
Detailed Timing Specifications
Detailed Timing Specifications when CDS_in Mode is Used
Figure 14 shows the detailed timing specifications when the CDS_in input mode is used, and table 4 shows each timing
specification.
Black
level
Signal
level
CDS_in
(2) (1)
(3)
SP1
Vth
(5)
(4)
SP2
Vth
(6)
(7)
(8)
ADCLK
Vth
(9)
(10)
D0 to D11
Figure 14 Detailed Timing Chart when CDS_in Input Mode is Used
Table 4 Timing Specifications when the CDS_in Input Mode is Used
No.
Timing
Symbol
Min
Typ
Max
Unit
(1) Black-level signal fetch time
t_CDS1
—
(1.5)
—
ns
(2) SP1 low period
t_CDS2
Typ  0.8
1/4f_CLK
Typ  1.2 ns
(3) Signal-level fetch time
t_CDS3
—
(1.5)
—
ns
(4) SP2 low period
t_CDS4
Typ  0.8
1/4f_CLK
Typ  1.2 ns
(5) SP1 rising to SP2 rising time
t_CDS5
Typ  0.85
1/2f_CLK
Typ  1.00 ns
(6) SP1 rising to ADCLK rising inhibition time
t_CDS6
—
(5)
—
ns
(7), (8) ADCLK t_WH min./t_WL min.
t_{CDS7, 8}
11
—
—
ns
(9) ADCLK rising to digital output hold time
t_CHLD9
—
(7)
—
ns
(10) ADCLK rising to digital output delay time
t_COD10
—
(16)
—
ns
Notes: 1. The value specified on frequency of operation is the case where "t_CDS5" is being protected. Even if the
frequency used is in specification, when this time is short, it becomes equivalent to the operation of high
frequency. Moreover, please set up max of t_CDS5 as 1/2f_CLK.
2. SP1 at the time of single sampling mode needs to set it as the phase shifted 180° to SP2.
OBP Detailed Timing Specifications
Figure 15 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).
OB period *¹
CDS_in
N
N+1
N+5
N+12
OBP
OB pulse > 2 clock
Note: 1. Shifts ±1 clock cycle depending on the OBP input timing.
Figure 15 OBP Detailed Timing Specifications
N+13
R19DS0068EJ0200 Rev.2.00
Jul 06, 2012
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