cxa1843q Sony Electronics, cxa1843q Datasheet - Page 14

• Manufacturer Part Number: cxa1843q
• Description: High-speed Sample-and-hold Ic
• Manufacturer: Sony Electronics

2. Analog input (CON1, CON2) and offset adjustment (VR1)
[V
When the amplitude of an analog input signal supplied to the sample-and-hold is 1Vp-p and its input range is
within 1.0V to –0.9V, the board is able to amplify its amplitude by two times using the operation amplifier. The
S1 selector should be short-circuited at side A and opened at side B, and the analog input is added from
CON1. In this case, offset adjustment is required at the VR1, so that the dynamic range of the analog input
signal can be set to a value between 0V to –2V by monitoring the V
[DIR IN. Input] (CON2)
When the input supplied to the sample-and-hold is a recurring signal (sine wave, etc.) without offset, it is
added using the AC coupled input from CON2 by connecting a 10k
to side B of the S1 selector. In this case, offset adjustment is required at the VR1, so that the dynamic range
of the analog input signal can be set to a value between 0V to –2V by monitoring the V
3. Clock input (CON4)
4. Digital output (CON5)
Connection and Setting for S/H + A/D Evaluation Board
1. Power supply voltage (CON6)
V
DIR. IN input (CON2)
IN
IN
Input] (CON1)
input (CON1)
TTL compatible
Use in the 30 to 70% CLK duty range
(CON4 is terminated to DGND at 50 on the board.)
TTL compatible
C-MOS (ACT series) output
Item
Vcc
V
EE
Item
+4.75
–5.25
Min.
(CON1 and CON2 are terminated to AGND at 50 on the board.)
–0.9
–2.0
Min.
Typ.
+5.0
–5.0
Typ.
0
+5.25
–4.75
Max.
– 14 –
Max.
1.0
2.0
Unit
V
V
Amplitude
Typical current
1.0
2.0
IN
–400
pin.
220
resistor to side A and a 0.1µF capacitor
Unit
V
V
10k
short
Unit
mA
mA
A
S1 setting
IN
pin.
0.1µF
open
B
CXA1843Q