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PDF CXA1843Q Data sheet ( Hoja de datos )
| Número de pieza | CXA1843Q | |
| Descripción | High-Speed Sample-and-Hold IC | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXA1843Q
High-Speed Sample-and-Hold IC
For the availability of this product, please contact the sales office.
Description
The CXA1843Q is a bipolar IC designed to sample-
and-hold video and various other signals with high
32 pin QFP (PIastic)
speed. It is ideal for video and other signal
conversions.
Features
• Maximum operating rate = 33MHz (min.)
• Low power consumption: 320mW
• S/H clock pulse generator circuit
• Built-in clock pulse generator for A/D converter
Applications
When used in combination of the CXA1844Q, the
CXA1843Q achieves A/D conversion.
Structure
Bipolar silicon monolithic IC
Block Diagram and Pin Configuration
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage VCC
7V
VEE –7 V
• Input voltage
(VIN pin)
VIN VEE to AVCC + 0.3 V
(REFIN pin) VREFIN +1 to AVCC + 0.3 V
(CLKIN pin) VCLK GND – 0.5 to DVCC + 0.3 V
(REX 2, 3, 4 pins) VREX2, 3, 4 GND to GND + 4 V
• Reference voltage
(REFFB pin) VREFFB
VEE to +3
V
(REFOUT pin) VREFOUT VEE to AVCC + 0.3 V
• Output current
(REFFOUT pin) IREFOUT
–1 to +1
mA
(SHOUT pin) ISHOUT
–12 to +12
mA
(CLKOUT pin) IADC
–1.5 to +1.5 mA
• Storage temperature
Tstg
–65 to +150
°C
• Allowable power dissipation
PD 1.1 W
NC 25
DVEE1 26
REX3 27
REX4 28
DVEE2 29
24 23 22 21 20 19 18 17
A/D CONVERTER
PULSE
GENERATOR
SAMPLE HOLD
PULSE
GENERATOR
REF DC 16 NC
SHIFT
15 REFFB
14 REFOUT
13 AVEE3
12 AVCC3
DVCC3 30
CLK IN 31
NC 32
SAMPLE
HOLD
11 SHOUT
10 AVEE2
9 NC
12 3456 78
Operating Conditions
• Supply voltage VCC
VEE
• Operating temperature
Topr
4.75 to 5.25
–4.75 to –5.25
–20 to +75
V
V
°C
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E92855B7Y
1 page  
CXA1843Q
Electrical Characteristics
(Ta = 25°C, VCC = 5V, VEE = –5V)
Item Symbol
Conditions
Min. Typ. Max. Unit
Maximun operating rate FC
33 MHz
Current consumption
ICC
IEE
32 41 50 mA
–28 –23 –18 mA
S/H Amplifier Block
VIN input current
IVIN VIN = –1V
1 20 50 µA
VIN input voltage range VIN
FIN = 1kHz, distortion factor ≤ –55dB –2.2
0.2 V
Droop
HMDR VIN = –2V to 0V
–20 20
80 mV/µs
Feed through
HMTH FIN = 16.5MHz (2Vp-p)
–40 –50 –70 dB
S/H output offset voltage VOFFSET VIN = –1V, FCLK = 33MHz
55 90 120 mV
S/H output gain
Gsh
FIN = 1kHz (2Vp-p),
FCLK = 33MHz
–0.5 0.3
0.5 dB
S/H output frequency
response
Fsh
20Log (VO (16.5MHz)/VO (200kHz)),
Sampling time = 14ns
–1
0.2
1 dB
S/H output slew rate
SR
CL = 50pF
140 160 200 V/µs
Reference Amplifier Block
REFIN input current
IREFIN
VREFIN = 2.5V
0 1 10 µA
REFFB output voltage VREFFB VREFIN = 2.5V
–2.2 –2.0 –1.8 V
Digital I/O Block
CLKIN input current
ICLKL
ICLKH
VCLKIN = 0V
VCLKIN = 5V
–10 –6
00
0 µA
1 µA
CLKIN input voltage
VCLKL
VCLKH
0.8 V
2.0 V
CLKIN clock width
TPWH
TPWL
9 ns
9 ns
A/D clock low level
VADCL
VCC – 1.52 VCC – 1.40 V
A/D clock high level
VADCH
VCC – 0.90 VCC – 0.78
V
–5–
5 Page 
T2 vs. REX2
40
35
30
25
20
15
10
0 123
REX2 [kΩ]
For normal use. REX = 21.6kΩ
A/D clock width Tpwh (T2-T1) variation vs. VCC
(VCC = 5.0V typ.)
1
CXA1843Q
A/D clock width Tpwh (T2-T1) variation vs. Ta
(Ta = 25°C typ.)
1
0.5
0
–0.5
–1
–25
0 25
Ta [°C]
50
75
A/D clock width Tpwh (T2-T1) variation vs. VEE
(VEE = –5.0V typ.)
1
0.5 0.5
00
–0.5 –0.5
–1
4.75
5
VCC [V]
5.25
S/H output delay (tdr, tdf) vs. REX3
(taqr, taqf) vs. REX4
45
40
taqf
taqr
35
30
tdr
25
tdf
20
15
2
1.1
34
2
For normal use, REX3 = 2.7kΩ
REX4 = 1.5kΩ
5 REX3 [kΩ]
2.8 REX4 [kΩ]
– 11 –
–1
–5.25
–5
VEE [V]
–4.75
S/H output delay variation vs. Ta
(Ta = 25°C typ.)
1.5
1
0.5
0
–0.5
–1
–1.5
–25
0 25
Ta [°C]
50
75
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet CXA1843Q.PDF ] | |
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