AD9806KST | |
|---|---|
| Manufacturer Part Number | AD9806KST |
| Description | IC CCD SIGNAL PROC 10BIT 48-LQFP |
| Manufacturer | Analog Devices Inc |
| Type | CCD Signal Processor, 10-Bit |
| AD9806KST datasheets |
|
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Warranty: 60 days
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Specifications of AD9806KST | |||
|---|---|---|---|
| Rohs Status | RoHS non-compliant | Input Type | Logic |
| Output Type | Logic | Interface | 3-Wire Serial |
| Mounting Type | Surface Mount | Package / Case | 48-LQFP |
| Analog Front End Type | CCD | Analog Front End Category | Video |
| Interface Type | Serial (3-Wire) | Input Voltage Range | 0.5V |
| Operating Supply Voltage (min) | 2.7V | Operating Supply Voltage (typ) | 3.3V |
| Operating Supply Voltage (max) | 3.6V | Resolution | 10b |
| Number Of Adc's | 1 | Power Supply Type | Analog/Digital |
| Operating Temp Range | -20C to 85C | Operating Temperature Classification | Commercial |
| Mounting | Surface Mount | Pin Count | 48 |
| Package Type | LQFP | Number Of Channels | 1 |
| Current - Supply | - | ||
PrevNext
APPLICATION INFORMATION
Grounding and Decoupling Recommendations
As shown in Figure 10, a single ground plane is recommended
for the AD9806. This ground plane should be as continuous as
possible, particularly around Pins 25 through 37. This will ensure
that all analog decoupling capacitors provide the lowest possible
impedance path between the power and bypass pins and their
respective ground pins. All decoupling capacitors should be
located as close as possible to the package pins. A single clean
power supply is recommended for the AD9806, but a separate
digital driver supply may be used for DRVDD (Pin 12). DRVDD
should always be decoupled to DRVSS (Pin 13), which should
be connected to the analog ground plane. The advantages of
using a separate digital driver supply include using a lower volt-
age (2.7 V) to match levels with a 2.7 V ASIC, reducing digital
power dissipation, and reducing potential noise coupling.
Using the AD9806 in AD9803 Sockets
The AD9806 may be easily used in existing AD9803 designs
without any circuit modifications. Most of the pin assignments
are the same for both ICs. Table I outlines the differences. The
circuit of Figure 10 shows the necessary connections for the
AD9806 when used in an existing AD9803 socket. If the two
auxiliary DACs are not used, then Pins 39 and 40 (DAC1 and
DAC2) may be grounded. If the AUX or ADC modes are needed,
then the input signal should be connected to either AUXIN or
ADCIN through a 0.1 µF capacitor, in the same way that
CCDIN is used with the input signal.
DIGITAL
OUTPUT
DATA
V
DD
NC = NO CONNECT
Pin
No.
AD9803
1
NC
15
ACLP
24
NC
25
CCDBYP2
27
PIN
28
CCDBYP2
29
PGABYP1
30
PGABYP2
35
AUXCONT
38
VTRBYP
Using the AD9806 in New Designs
Figure 11 shows the recommended circuit for using the AD9806
in new designs. Three external decoupling capacitors have been
removed from the circuit shown in Figure 9, one from Pin 29,
one from Pin 38, and one from between Pins 47 and 48. Note
that the decoupling capacitors for Pins 47 (VRB) and 48 (VRT)
must be increased to 1.0 µF when used in this configuration.
V
DD
0.1 F
0.1 F
1.0 F
0.1 F
48 47 46 45 44
43 42 41 40
39 38 37
NC
1
D0 (LSB)
2
D1
3
4
D2
5
D3
6
D4
AD9806
7
D5
D6
8
D7
9
D8
10
D9 (MSB)
11
12
DRVDD
13 14 15 16 17 18 19 20 21 22 23 24
0.1 F
V
DD
0.1 F
AD9806
Table I. AD9806/AD9803 Pin Differences
AD9806
Circuit Connection
NC
Ground
NC
Ground
NC
Ground
Decoupled with 0.1 µF
CLPOUT
to Ground
NC
Shorted to Pin 26
Decoupled with 0.1 µF
CLPREF
to Ground
Decoupled with 0.1 µF
NC
to Ground
NC
Shorted to Pin 29
AUXMID
Ground, or decoupled
with 0.1 µF to Ground
Decoupled with 0.1 µF
NC
to Ground
SDATA
SCK
SL
VOUT2
VOUT1
0.1 F
0.1 F
V
DD
ADCIN
36
AUXMID
35
AUXIN
34
0.1 F
ACVDD
33
0.1 F
CLPBYP
32
ACVSS
31
NC
30
0.1 F
NC
29
CLPREF
28
0.1 F
NC
27
CCD
DIN
26
SIGNAL
INPUT
0.1 F
CLPOUT
25
0.1 F
CLPDM
SHD
SHP
CLPOB
PBLK
ADCCLK
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