Electro-optical performance, Th7804a – Rainbow Electronics TH7804A User Manual
Page 5
5
TH7804A
1989A–IMAGE–05/02
Note:
1. Transients under 0.0V in the clock pulses will lead to charge injection, causing a localized increase in the dark signal. If such
spurious negative transients are present, they can be suppressed by inserting a serial resistor of appropriate value (typically
20 to 100
Ω) in the corresponding driver output.
Notes:
1. V
OS
= average video output voltage.
2. Fs = 2 F
Φ
T
. The minimum clock frequency is limited by the increase in dark signal.
Electro-optical
Performance
General measurement conditions: T
C
= 25°C; T
i
= 1 ms; F
Φ
T = 2.5 MHz (F
DATA
= 5 MHz)
Light source: tungsten filament lamp (2854 K) + B6 38 filter (2 mm thick), F/3.5 aperture.
The filter limits the spectrum to 700 nm; in these conditions 1µJ/cm
2
corresponds to 3.5
lux.s.
Operating conditions (see Figure 1).
First and last pixels, as well as reference elements, are excluded from the specification.
Measurements taken on each output in succession.
Table 3. Drive Clock Characteristics (see Figure 2)
Parameter
Symbol
Logic
Value
Unit
Remark
Min.
Typ.
Max.
Transfer Clock
Φ
P
,
Φ
T
High
11
13
14
V
Register Transport Clock
Low
0.0
0.4
0.6
Register Transport Clock
Capacitance
C
Φ
T
400
700
pF
Transfer Clock Capacitance
C
Φ
P
130
200
pF
Table 4. Static and Dynamic Electrical Characteristics
Parameter
Symbol
Value
Logic
Remark
Min.
Typ.
Max.
DC Output Level
V
REF
8
10
12
V
Output Impedance
Z
S
500
Ω
Register Single-stage Transfer
Efficiency
CTE
99.992
99.998
%
V
OS
= 1V
Max. Data Output Frequency
F
S max
12
20
MHz
Input Current On Pins: 2, 9, 10,
11, 12, 15, 16, 17, 18, 22
I
e
2
µA
V
IN
= 15V
All other pins: 0V
Peak Current Sink on
Φ
T
Clock
(I
Φ
T
)
P
250
mA
t
RISE
= 15 ns
Peak Current Sink on
Φ
P
Clock
(I
Φ
P
)
P
80
mA
t
RISE
= 15 ns
Output Amplifier + Internal Logic
Supply Current
I
DD
17
mA
V
INH
= 0V
V
DD
= 15V
Static Power Dissipation
P
D
255
300
mW
V
INH
= 0V
V
DD
= 15V