INTEGRATED CIRCUITS
DATA SHEET
TDA8790
8-bit, 40 Msps 2.7 to 5.5 V universal
analog-to-digital converter
Product specification
Supersedes data of 1995 May 08
File under Integrated Circuits, IC02
1996 Feb 21
Philips Semiconductors
Product specification
8-bit, 40 Msps 2.7 to 5.5 V universal
analog-to-digital converter
FEATURES
•
8-bit resolution
•
Operation between 2.7 and 5.5 V
•
Sampling rate up to 40 MHz
•
DC sampling allowed
•
High signal-to-noise ratio over a large analog input
frequency range (7.3 effective bits at 4.43 MHz
full-scale input at f
clk
= 40 MHz)
•
CMOS/TTL compatible digital inputs and outputs
•
External reference voltage regulator
•
Power dissipation only 30 mW (typical)
•
Low analog input capacitance, no buffer amplifier
required
•
Sleep mode (4 mW)
•
No sample-and-hold circuit required.
QUICK REFERENCE DATA
SYMBOL
V
DDA
V
DDD
V
DDO
∆V
DD
PARAMETER
analog supply voltage
digital supply voltage
output stages supply voltage
supply voltage difference
V
DDA
−
V
DDD
V
DDD
−
V
DDO
I
DDA
I
DDD
I
DDO
INL
DNL
f
clk(max)
P
tot
analog supply current
digital supply current
output stages supply current
integral non-linearity
differential non-linearity
maximum clock frequency
total power dissipation
V
DDA
= V
DDD
= V
DDO
= 3.3 V
f
clk
= 40 MHz; C
L
= 20 pF;
ramp input
f
clk
= 40 MHz; ramp input
f
clk
= 40 MHz; ramp input
−0.2
−0.2
−
−
−
−
−
40
−
−
−
4
5
1
±0.5
±0.25
−
30
CONDITIONS
MIN.
2.7
2.7
2.5
TYP.
3.3
3.3
3.3
APPLICATIONS
TDA8790
High-speed analog-to-digital conversion for:
•
Video data digitizing
•
Camera
•
Camcorder
•
Radio communication.
GENERAL DESCRIPTION
The TDA8790 is an 8-bit universal analog-to-digital
converter (ADC) for video and general purpose
applications. It converts the analog input signal from
2.7 to 5.5 V into 8-bit binary-coded digital words at a
maximum sampling rate of 40 MHz. All digital inputs and
outputs are CMOS/TTL compatible. A sleep mode allows
reduction of the device power consumption down to 4 mW.
MAX.
5.5
5.5
5.5
+0.2
+2.25
6
8
2
±0.75
±0.5
−
53
UNIT
V
V
V
V
V
mA
mA
mA
LSB
LSB
MHz
mW
ORDERING INFORMATION
TYPE
NUMBER
TDA8790M
PACKAGE
NAME
SSOP20
DESCRIPTION
plastic shrink small outline package; 20 leads; body width 4.4 mm
VERSION
SOT266-1
1996 Feb 21
2
Philips Semiconductors
Product specification
8-bit, 40 Msps 2.7 to 5.5 V universal
analog-to-digital converter
BLOCK DIAGRAM
TDA8790
handbook, full pagewidth
V DDA
5
CLK
1
VDDD
3
CLOCK DRIVER
V RT 10
2
TDA8790
SLEEP
19 D7
RLAD
analog
voltage input
VI
9
ANALOG -TO - DIGITAL
CONVERTER
LATCHES
CMOS
OUTPUTS
18 D6
17 D5
16 D4
15 D3
14 D2
13 D1
12 D0
VRB 7
20
LSB
VDDO
data outputs
MSB
V RM 8
6
VSSA
analog
ground
11
VSSO
output
ground
4
VSSD1
MBE502
digital
ground
Fig.1 Block diagram.
1996 Feb 21
3
Philips Semiconductors
Product specification
8-bit, 40 Msps 2.7 to 5.5 V universal
analog-to-digital converter
PINNING
SYMBOL
CLK
SLEEP
V
DDD
V
SSD
V
DDA
V
SSA
V
RB
V
RM
V
I
V
RT
V
SSO
D0
D1
D2
D3
D4
D5
D6
D7
V
DDO
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
clock input
sleep mode input
digital supply voltage (2.7 to 5.5 V)
digital ground
analog supply voltage (2.7 to 5.5 V)
analog ground
reference voltage BOTTOM input
reference voltage MIDDLE
analog input voltage
reference voltage TOP input
digital output ground
data output; bit 0 (LSB)
data output; bit 1
data output; bit 2
data output; bit 3
data output; bit 4
data output; bit 5
data output; bit 6
data output; bit 7 (MSB)
positive supply voltage for output
stage (2.7 to 5.5 V)
Fig.2 Pin configuration.
CLK
SLEEP
VDDD
VSSD
VDDA
VSSA
VRB
VRM
VI
1
2
3
4
5
TDA8790
DESCRIPTION
20 VDDO
19 D7
18 D6
17 D5
16 D4
TDA8790
6
7
8
9
15 D3
14 D2
13 D1
12 D0
11 VSSO
MBE501
VRT 10
1996 Feb 21
4
Philips Semiconductors
Product specification
8-bit, 40 Msps 2.7 to 5.5 V universal
analog-to-digital converter
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
DDA
V
DDD
V
DDO
∆V
DD
PARAMETER
analog supply voltage
digital supply voltage
output stages supply voltage
supply voltage difference
V
DDA
−
V
DDD
V
DDA
−
V
DDO
V
DDD
−
V
DDO
V
I
V
clk(p-p)
I
O
T
stg
T
amb
T
j
Note
input voltage
AC input voltage for switching
(peak-to-peak value)
output current
storage temperature
operating ambient temperature
junction temperature
referenced to V
SSA
referenced to V
SSD
−1.0
−1.0
−1.0
−0.3
−
−
−55
−20
−
+4.0
+4.0
+4.0
+7.0
V
DDD
10
+150
+75
+150
CONDITIONS
note 1
note 1
note 1
MIN.
−0.3
−0.3
−0.3
TDA8790
MAX.
+7.0
+7.0
+7.0
V
V
V
V
V
V
V
V
UNIT
mA
°C
°C
°C
1. The supply voltages V
DDA
, V
DDD
and V
DDO
may have any value between
−0.3
V and +7.0 V provided that the supply
voltage
∆V
DD
remains as indicated.
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.
THERMAL CHARACTERISTICS
SYMBOL
R
th j-a
PARAMETER
thermal resistance from junction to ambient in free air
VALUE
120
UNIT
K/W
1996 Feb 21
5
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