TH7804A Datasheet, PDF (8/11 Pages) ATMEL Corporation – Linear Charged Couple Device (CCD) Image Sensor 1024 Pixels

Table 6. Selection of Operating Modes
Option
Implementation
Remarks
Φ_ECHA (2) and Φ_ECHB (22) connected to V_DD
No Sampling
SΦ_ECHA (3) and SΦ_ECHB (21) unconnected
(1)
V_INH (19) connected to V_DD
Sampling by External Clocks
Sampling clocks connected to Φ_ECHA Φ_ECHB
SΦ_ECHA and SΦ_ECHB unconnected
V_INH (19) connected to V_DD
see Figure 5 for
sampling clock timing
(1)
Reset Control by External Clocks
Ext. Φ_RA on Φ_RA (4) input
Ext. Φ_RB on Φ_RB (18)
see Figure 4 for
reset clock timing
Note: 1. Drain supply current I_DD decreases from 10 mA to 8 mA typically when internal sampling clock is disabled.
Table 7. External Φ_RA, Φ_RB, Φ_ECHA, Φ_ECHB Clock Characteristics
Parameter
External Reset Clock
Sampling Clocks
Reset and Sampling Clock
Capacitance
Symbol
Φ_RA, Φ_RB
Φ_ECHA, Φ_ECHB
CΦ_RA, CΦ_RB
CΦ_ECHA, CΦ_ECHB
Logic
High
Low
Min.
12
0.0
Values
Typ.
12.5
0.4
10
Max.
13
0.6
15
Unit
V
V
pF
Insertion of a serial resistor (typically 100Ω) at the driver output avoids spurious negative transients.
8 TH7804A
1989A–IMAGE–05/02