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HI1179 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer HI1179
Beschreibung Video A/D Converter
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 14 Seiten
HI1179 Datasheet, Funktion
HI1179
August 1997
8-Bit, 35 MSPS, Video A/D Converter
Features
Description
• Resolution 8-Bit . . . . . . . . . . . . . . . . . . ±0.5 LSB (DNL)
• ENOB at fIN = 1MHz . . . . . . . . . . . . . . . . . . . . . . 7.6 Bits
• Maximum Sampling Frequency . . . . . . . . . . . 35 MSPS
• Low Power Consumption 80mW (at 35 MSPS Typ)
(Reference Current Excluded)
• Built-In Input Clamp Function (DC Restore)
• No Sample/Hold Required
• Internal Voltage Reference
• Input CMOS Compatible
• Three-State TTL Compatible Output
• Single Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . +5V
• Low Input Capacitance (Typ) . . . . . . . . . . . . . . . . . 8pF
• Reference Impedance (Typ) . . . . . . . . . . . . . . . . . 330
• Direct Replacement for Sony CXD1179
Applications
The HI1179 is an 8-bit CMOS analog-to-digital converter for
video use that features a sync clamp function. The adoption
of a 2-step parallel method realizes low power consumption
and a maximum conversion speed of 35 MSPS, allowing up
to 8x over sampling of NTSC and PAL signals.
The HI1179 is available in the Industrial temperature range
and is supplied in 32 lead Plastic Metric Quad Flatpack
(MQFP) package. For lower sampling rates, refer to the
HI1176 data sheet.
Ordering Information
PART
NUMBER
TEMP. RANGE
(oC)
PACKAGE PKG. NO.
HI1179JCQ
-40 to 85
32 Ld MQFP Q32.7x7-S
HI1179-EV
25 Evaluation Board
• Desktop Video
www.DataSheet4U.com • Multimedia
• Video Digitizing
• Image Scanners
• Low Cost High Speed Data Acquisition Systems
Pinout
HI1179 (MQFP)
TOP VIEW
(LSB) D0
D1
D2
D3
D4
D5
D6
(MSB) D7
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 10 11 12 13 14 15 16
VRB
AVSS
AVSS
VIN
AVDD
AVDD
VRT
VRTS
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
4-1110
File Number 3666.3






HI1179 Datasheet, Funktion
HI1179
Timing Diagrams (Continued)
7V (tPZL, tPLZ)
OPEN
S1 (tPZH, tPHZ)
FROM OUTPUT
UNDER TEST
R1
500
CL
15pF
R2
500
TEST
POINT
OE
DATA
OUTPUT
WAVEFORM 1
DATA
OUTPUT
WAVEFORM 2
1.4V
tPZL
tPZH
1.4V
1.4V
tPLZ
tPHZ
4V
0V
3.5V
VOL
0.3V
0.3V
VOH
0V
FIGURE 14A. THREE-STATE LOAD CIRCUIT
FIGURE 14B. THREE-STATE OUTPUT ENABLE/DISABLE
TIMES
Typical Performance Curves fC = 35 MSPS, TA = 25oC, Unless Otherwise Specified
8.0
fC = 35 MSPS
-30
fC = 35 MSPS
7.5 -40
SECOND HARMONIC
7.0 -50
THIRD HARMONIC
6.5 -60
6.0
1
5 7.5 10
fIN (MHz)
FIGURE 15. ENOB vs INPUT FREQUENCY
15
-70
1
5 7.5 10
fIN (MHz)
15
FIGURE 16. HARMONICS vs INPUT FREQUENCY
8.5
8.0
fIN = 1MHz
7.5
fIN = 5MHz
7.0
fIN = 10MHz
6.5
6.0
5.5
20
27 35
CLOCK FREQUENCY (MHz)
FIGURE 17. ENOB vs CLOCK FREQUENCY
40
-30
fC = 35 MSPS
-35
-40
fIN = 10MHz
-45
-50
-55
fIN = 5MHz
fIN = 1MHz
-60
0
25 50
TEMPERATURE (oC)
FIGURE 18. THD vs TEMPERATURE
75
4-1115

6 Page









HI1179 pdf, datenblatt
Test Circuits (Continued)
HI1179
2.6V
0.6V
VDD
VRT
VIN
VRB
CLK
OE
GND
IOL
VOL +
-
2.6V
0.6V
VDD
VRT
VIN
VRB
CLK
OE
GND
IOH
VOH
+
-
FIGURE 25A.
FIGURE 25B.
FIGURE 25. DIGITAL OUTPUT CURRENT TEST CIRCUIT
Typical Application Circuits
CLOCK IN
74ACO4
CLAMP
PULSE IN
LATCH
CK
Q
+5V (ANALOG)
0.01µF
VIDEO IN
HA5020
+-
1k
1k
10µF 75
+
10pF
0.1µF
0.01µF
+5V (ANALOG)
+ 5V (DIGITAL)
0.1µF
16 15 14 13 12 11 10 9
17 8
18 7
19 6
20 5
21 4
22 3
23 2
24 1
25 26 27 28 29 30 31 32
D7
D6
D5
D4
D3
D2
D1
D0
20K VREF
GND (ANALOG)
0.01µF
GND (DIGITAL)
FIGURE 26. INPUT CLAMP APPLICATION (INTERNAL REFERENCE USED)
4-1121

12 Page





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