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Электронный компонент: TDA8707H

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DATA SHEET
Product specification
Supersedes dat of March 1995
File under Integrated Circuits, IC02
1996 Feb 01
INTEGRATED CIRCUITS
TDA8707
Triple RGB 6-bit video
analog-to-digital interface
1996 Feb 01
2
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
FEATURES
Triple analog-to-digital converter (ADC)
6-bit resolution
Sampling rate up to 35 MHz
Power dissipation of 335 mW (typical)
Internal clamping function
TTL compatible digital inputs
-
40 to +85
C operating temperature
CMOS digital outputs.
APPLICATIONS
High-speed analog-to-digital conversion for video
signals
VGA signal treatment.
DESCRIPTION
The TDA8707 is a CMOS triple 6-bit video low-power
analog-to-digital converter (ADC) for RGB signals.
It converts the analog inputs into 6-bit binary coded digital
words at a sampling rate of 35 MHz. All analog signal
inputs are clamped.
Analog-to-digital converter
The TDA8707 implements 3 independent 6-bit
analog-to-digital converters in CMOS process. These
converters use a full-flash approach.
Clamping feature
An internal clamping circuit is provided in each of the
3 analog channels. The analog pins INR, ING and INB are
switched, through series capacitors, to on-chip clamping
levels during an active pulse on the clamp input CLP.
Clamping level in the R, G and B channels is Code 0.
Input buffers
Internal buffers are provided to drive the analog-to-digital
converter inputs. Their ratio can be adjusted externally at
1.5 or 2.0 with select input SLT.
QUICK REFERENCE DATA
Notes
1. The number of effective bits is measured with a clock frequency of 35 MHz. This value is given for a 4.43 MHz
frequency on the R, G and B channels.
2. The external resistor (value 15 k
) between V
DDA
and CLREF, fixing internal static currents, influences P
tot
.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
DDA
analog supply voltage
4.5
5.0
5.5
V
V
DDD
digital supply voltage
4.5
5.0
5.5
V
I
DDA
analog supply current
-
60
80
mA
I
DDD
digital supply current
f
clk
= 35 MHz
-
5
8
mA
INL
integral non-linearity
f
clk
= 35 MHz; ramp input;
T
amb
= 25
C
-
0.35
0.6
LSB
DNL
differential non-linearity
f
clk
= 35 MHz; ramp input;
T
amb
= 25
C
-
0.35
0.6
LSB
EB
effective bits
note 1
-
5.3
-
bits
f
clk
maximum clock conversion rate
35
-
-
MHz
P
tot
total power dissipation
f
clk
= 35 MHz; note 2
-
335
485
mW
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8707H
QFP44
plastic quad flat package; 44 leads; lead length 1.3 mm; body 10
10
1.75 mm SOT307-2
1996 Feb 01
3
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
MGA919
CLAMPING
CIRCUIT
6-BIT
ADC
6
38,
40-44
34
35
33
VDDA1
V
SSA1
BUFFER
CLAMPING
CIRCUIT
6-BIT
ADC
6
3-8
31
32
30
VDDA2
V
SSA2
BUFFER
CLAMPING
CIRCUIT
6-BIT
ADC
6
14-16,
18-20
28
29
27
VDDA3
V
SSA3
BUFFER
26
25
22
21
9
11
V
DDD1
V
SSD1
V
SSD2
V
DDD2
24
23
10
TDA8707
36
INR
ING
INB
CREFH
CREFL
SLT
B0 to B5
G0 to G5
R0 to R5
CLREF
CLP
CLK
1996 Feb 01
4
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
PINNING
SYMBOL
PIN
DESCRIPTION
n.c.
1
not connected
n.c.
2
not connected
G0
3
GREEN data output; bit 0 (LSB)
G1
4
GREEN data output; bit 1
G2
5
GREEN data output; bit 2
G3
6
GREEN data output; bit 3
G4
7
GREEN data output; bit 4
G5
8
GREEN data output; bit 5 (MSB)
V
SSD1
9
digital supply ground 1
CLK
10
clock input
V
DDD1
11
digital supply voltage 1
n.c.
12
not connected
n.c.
13
not connected
B0
14
BLUE data output; bit 0 (LSB)
B1
15
BLUE data output; bit 1
B2
16
BLUE data output; bit 2
n.c.
17
not connected
B3
18
BLUE data output; bit 3
B4
19
BLUE data output; bit 4
B5
20
BLUE data output; bit 5 (MSB)
V
SSD2
21
digital supply ground 2
V
DDD2
22
digital supply voltage 2
CLP
23
clamping input
CLREF
24
ADCs current reference level input
CREFL
25
converter reference LOW level input
CREFH
26
converter reference HIGH level input
V
DDA3
27
analog supply voltage 3
INB
28
BLUE analog input
V
SSA3
29
analog supply ground 3
V
DDA2
30
analog supply voltage 2
ING
31
GREEN analog input
V
SSA2
32
analog supply ground 2
V
DDA1
33
analog supply voltage 1
INR
34
RED analog input
V
SSA1
35
analog supply ground 1
SLT
36
select input buffer ratio
n.c.
37
not connected
R0
38
RED data output; bit 0 (LSB)
n.c.
39
not connected
R1
40
RED data output; bit 1
R2
41
RED data output; bit 2
R3
42
RED data output; bit 3
R4
43
RED data output; bit 4
R5
44
RED data output; bit 5 (MSB)
SYMBOL
PIN
DESCRIPTION
1996 Feb 01
5
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
DDA
analog supply voltage (pins 27, 30 and 33)
-
0.3
+6.5
V
V
DDD
digital supply voltage (pins 11 and 22)
-
0.3
+6.5
V
V
DD
supply voltage difference between V
DDA
and V
DDD
-
0.5
+0.5
V
V
I
input voltage (pins 28, 31 and 34)
referenced to V
SSA
-
V
DDA
V
V
i(p-p)
AC input voltage for switching
(pins 10 and 23; peak-to-peak value)
referenced to V
SSD
-
V
DDD
V
T
stg
storage temperature
-
55
+150
C
T
amb
operating ambient temperature
-
40
+85
C
T
j
junction temperature
-
+125
C
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
75
K/W
Fig.2 Pin configuration.
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
index
corner
TDA8707
VSSA2
CLK
CREFH
CREFL
CLREF
MGA920
VSSD1
VDDD1
CLP
R5
R4
R3
R2
R1
V
SSA1
INR
SLT
n.c.
R0
n.c.
G5
G4
G3
G2
G1
G0
n.c.
n.c.
VDDA1
ING
VDDA2
VSSA3
VDDA3
INB
V
SSD2
V
DDD2
n.c.
n.c.
B0
B1
B2
n.c.
B3
B4
B5
1996 Feb 01
6
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.
CHARACTERISTICS (see Tables 1 and 2)
V
DDA
= V
DDD
= 4.5 to 5.5 V; V
SSA
and V
SSD
short-circuited together; V
DDA
-
V
DDD
=
-
0.5 to +0.5 V;
T
amb
=
-
40 to +85
C; SLT = 0 V; CREFH = 2 V, CREFL = 0.5 V, C
L
= 15 pF; typical values measured at
V
DDA
= V
DDD
= 5 V; V
SSA
= V
SSD
= 0 V and T
amb
= 25
C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
V
DDA
analog supply voltage
note 1
4.5
5.0
5.5
V
V
DDD
digital supply voltage
note 1
4.5
5.0
5.5
V
I
DDA
analog supply current
note 1
-
60
80
mA
I
DDD
digital supply current
f
clk
= 35 MHz
-
5
8
mA
Inputs
D
IGITAL INPUTS
(
CLK
:
PIN
10
AND CLP
:
PIN
23)
V
IL
LOW level input voltage
0
-
0.8
V
V
IH
HIGH level input voltage
2.0
-
V
DDD
V
I
LI
input leakage current
-
10
-
+10
A
C
I
input capacitance
-
7
-
pF
C
LAMP AND REFERENCES
(
CLREF
:
PIN
24,
CREFL
:
PIN
25
AND CREFH
:
PIN
26)
A
CL
clamping accuracy
-
0.5
-
LSB
I
CL
input clamping current
-
200
-
+400
A
C
CL
external series clamping capacitor
10
22
-
nF
R
CLREF
external resistor on CLREF pin for
current reference of converter
note 2
12
15
-
k
V
REFH
converter reference voltage HIGH level
applied to CREFH pin
referenced to V
SSA
1.5
2.0
2.5
V
V
REFL
converter reference voltage LOW level
applied to CREFL pin
referenced to V
SSA
0.25
0.5
0.75
V
REF
reference voltage difference between
V
REFH
and V
REFL
note 3
-
1.5
-
V
Z
CREF
internal ladder impedance between
pins CREFH and CREFL
-
300
-
A
NALOG INPUTS
(
INR
:
PIN
34,
ING
:
PIN
31
AND INB
:
PIN
28)
V
I(p-p)
full-range input voltage (peak-to-peak
value)
SLT = logic 0;
gain = 1.5; note 4
-
1.0
-
V
SLT = logic 1;
gain = 2.0; note 4
-
0.75
-
V
I
I
input current
clamp off
-
5
100
nA
C
I
input capacitance
-
7
15
pF
1996 Feb 01
7
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
I
NPUT ISOLATION
ct
crosstalk between INR, ING and INB
-
-
-
40
dB
Outputs (R0 to R5: pins 38 and 40 to 44; G0 to G5: pins 3 to 8; B0 to B5: pins 14 to 16 and 18 to 20)
V
OL
LOW level output voltage
0
-
0.5
V
V
OH
HIGH level output voltage
4.0
-
V
DDD
V
Switching characteristics
C
LOCK INPUT
CLK (see Fig.3)
f
clk(max)
maximum clock frequency
35
-
-
MHz
t
CPH
clock pulse width HIGH
10
-
-
ns
t
CPL
clock pulse width LOW
12
-
-
ns
Analog signal processing (50% clock duty cycle) f
clk
= 35 MHz
L
INEARITY
INL
integral non-linearity
ramp input; T
amb
= 25
C
-
0.35
0.6
LSB
DNL
differential non-linearity
ramp input; T
amb
= 25
C
-
0.35
0.6
LSB
B
ANDWIDTH
(see Fig.5 and note 7)
B
-
3 dB analog bandwidth
-
9
-
MHz
t
STLH
analog input settling time LOW-to-HIGH full scale square wave
-
13
16
ns
t
STHL
analog input settling time HIGH-to-LOW full scale square wave
-
11
14
ns
H
ARMONICS
; note 6
f
1
fundamental harmonic
-
-
0
dB
f
all
harmonics, all components
-
-
37
-
dB
E
FFECTIVE BITS
EB
effective bits
f
i
= 4.43 MHz
-
5.3
-
bits
D
IFFERENTIAL GAIN
; note 5
G
diff
differential gain
PAL modulated ramp
-
3
-
%
D
IFFERENTIAL PHASE
; note 5
diff
differential phase
PAL modulated ramp
-
2
-
deg
Timing (see Figs 3 and 4)
t
dS
sampling delay time
-
3
-
ns
t
h
output hold time
6
-
-
ns
t
d
output delay time
note 8
-
-
16
ns
t
r
clock rise time
3
5
-
ns
t
f
clock fall time
3
5
-
ns
t
CLP
active clamping duration
3
4
-
s
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1996 Feb 01
8
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
Notes to the characteristics
1. V
DDA
and V
DDD
should be supplied from the same power supply and decoupled separately.
2. The analog supply current is directly proportional to the series resistance between V
DDA
and CLREF.
3. CREFH and CREFL are connected respectively to the top and bottom reference ladders of the 3 analog-to-digital
converters.
4. V
I(p-p)
= (V
REFL
-
V
REFH
)/buffer gain factor. See Table for gain factor selection. When clamping at code 0 is used,
active video signal amplitude V
ACT
should be:
5. Measurement carried out using video analyser VM700A, where the video analog signal is reconstructed through a
digital-to-analog converter.
6. V
I(p-p)
=
REF with f
i
= 4.43 MHz.
7. The analog input settling time is the minimum time required for the input signal to be stabilized after a sharp full-scale
input (square-wave signal) in order to sample the signal and obtain correct output data.
8. Output data acquisition: output data is available after the maximum delay time of t
d
.
Table 1
Typical output coding (V
REFH
= 2 V; V
REFL
= 0.5 V referenced to V
SSA
, SLT = logic 0; buffer ratio = 1.5;
T
amb
= 25
C)
Table 2
Mode selection
STEP
V
I(p-p)
BINARY OUTPUT BITS
D5
D4
D3
D2
D1
D0
-
<
0.333 =
0
0
0
0
0
0
0
0.349
0
0
0
0
0
0
1
0.364
0
0
0
0
0
1
.
.
.
.
.
.
.
62
1.317
1
1
1
1
1
0
63
1.333
1
1
1
1
1
1
-
>
1.333 =
1
1
1
1
1
1
SLT
BUFFER RATIO
TYPICAL V
I(p-p)
FULL SCALE
0
1.5
1
2.0
V
ACT
V
REFH
V
REFL
(
)
buffer gain factor
-----------------------------------------------
=
V
REFL
1.5
----------------
V
REFH
1.5
-----------------
V
REFH
V
REFL
1.5
----------------------------------------
V
REFH
V
REFL
2.0
----------------------------------------
1996 Feb 01
9
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
TIMING DIAGRAMS
Fig.3 Input timing.
handbook, full pagewidth
CLK
MLB759
1.4 V
DATA
D0 to D5
t d
CPH
t
CPL
t
2.4 V
0.4 V
1.4 V
DATA
N + 1
DATA
N
DATA
N - 1
DATA
N - 2
dS
t
sample N + 1
sample N
sample N + 2
IN R, G, B
t h
Fig.4 Clamp timing.
handbook, full pagewidth
MGA922
digital
output
level
63
0
time
black-level
clamping
CLP
t CLP
1996 Feb 01
10
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
Fig.5 Analog input settling-time diagram.
handbook, full pagewidth
MLD208
50 %
STLH
t
2 ns
code 0
code 64
I
50 %
0.5 ns
50 %
2 ns
STHL
t
50 %
0.5 ns
CLK
V
1996 Feb 01
11
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
INTERNAL CIRCUITRY
Fig.6 Internal circuitry.
MGA925
VDDD
VSSD
(a)
V DDA
(b)
(c)
(d)
VSSA
VSSA
VSSA VSSA
VDDD
VSSD
(a) Digital inputs; pins 10, 23 and 36.
(b) Analog inputs; pins 28, 31 and 34.
(c) Current reference; pin 24.
(d) Digital outputs; pins 3 to 8, 14 to 16, 18 to 20 and 40 to 44.
1996 Feb 01
12
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
APPLICATION INFORMATION
Fig.7 Application diagram.
Analog and digital supplies should be separated and decoupled.
Supplies are not connected internally; also applicable to grounds.
The internal reference currents are set by the series resistor between pin V
DDA
and CLREF.
The resistor value should be in the range of 12 k
and 15 k
.
It is recommended, if possible, to connect pins 1, 2, 12, 13, 17, 37 and 39 to V
SSD
.
handbook, full pagewidth
MGA926
15 k
R5
R4
R3
R2
R1
VSSA1 INR
SLT
n.c.
R0
n.c.
CLK
VSSD1
VDDD1
G5
G4
G3
G2
G1
G0
n.c.
n.c.
VSSA2
CREFH
CREFL
CLREF
CLP
VDDA1
ING
VDDA2
VSSA3
VDDA3
INB
VSSD2 V DDD2
n.c.
n.c.
B0
B1
B2
n.c.
B3
B4
B5
22 nF
BLUE
33
32
31
30
29
28
27
26
25
24
23
2 V
0.5 V
22 nF
GREEN
100 nF
100 nF
100 nF
34
RED
22 nF
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
7
8
9
10
11
100
nF
22
21
20
19
18
17
16
15
14
13
12
5 V
100
nF
5 V
TDA8707
2.2 nF
1996 Feb 01
13
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
PACKAGE OUTLINE
UNIT
A
1
A
2
A
3
b
p
c
E
(1)
e
H
E
L
L
p
Q
Z
y
w
v
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
mm
0.25
0.05
1.85
1.65
0.25
0.40
0.20
0.25
0.14
10.1
9.9
0.8
1.3
12.9
12.3
0.85
0.75
1.2
0.8
10
0
o
o
0.15
0.1
0.15
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
0.95
0.55
SOT307-2
92-11-17
95-02-04
D
(1)
(1)
(1)
10.1
9.9
H
D
12.9
12.3
E
Z
1.2
0.8
D
e
E
B
11
c
E
H
D
ZD
A
Z E
e
v
M
A
X
1
44
34
33
23
22
12
y
A
1
A
L
p
Q
detail X
L
(A )
3
A
2
pin 1 index
D
H
v
M
B
b
p
b
p
w
M
w
M
0
2.5
5 mm
scale
QFP44: plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm
SOT307-2
A
max.
2.10
1996 Feb 01
14
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
"IC Package Databook" (order code 9398 652 90011).
Reflow soldering
Reflow soldering techniques are suitable for all QFP
packages.
The choice of heating method may be influenced by larger
plastic QFP packages (44 leads, or more). If infrared or
vapour phase heating is used and the large packages are
not absolutely dry (less than 0.1% moisture content by
weight), vaporization of the small amount of moisture in
them can cause cracking of the plastic body. For more
information, refer to the Drypack chapter in our
"Quality
Reference Handbook" (order code 9397 750 00192).
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250
C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45
C.
Wave soldering
Wave soldering is not recommended for QFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
If wave soldering cannot be avoided, the following
conditions must be observed:
A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
The footprint must be at an angle of 45
to the board
direction and must incorporate solder thieves
downstream and at the side corners.
Even with these conditions, do not consider wave
soldering the following packages: QFP52 (SOT379-1),
QFP100 (SOT317-1), QFP100 (SOT317-2),
QFP100 (SOT382-1) or QFP160 (SOT322-1).
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260
C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150
C within
6 seconds. Typical dwell time is 4 seconds at 250
C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Repairing soldered joints
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300
C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320
C.
1996 Feb 01
15
Philips Semiconductors
Product specification
Triple RGB 6-bit video analog-to-digital
interface
TDA8707
DEFINITIONS
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
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SCDS47
Philips Electronics N.V. 1996
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other industrial or intellectual property rights.
Printed in The Netherlands
537021/1100/03/pp16
Date of release: 1996 Feb 01
Document order number:
9397 750 00605