Intersil Corporation HI1172 Datasheet
August 1997
HI1172
6-Bit, 20 MSPS,
Video A/D Converter (CMOS)
Features
• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-Bit
• Maximum Sampling Frequency . . . . . . . . . . . 20 MSPS
• Low Power Consumption at 20 MSPS (Typ)
(Reference Current Excluded) . . . . . . . . . . . . . . .40mW
• Built-In Sample and Hold Circuit
• Three-State TTL Compatible Output
• Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . 5V Single
• Low Input Capacitance . . . . . . . . . . . . . . . . . . . . . . . 4pF
• Reference Impedance . . . . . . . . . . . . . . . . . . 250Ω (Typ)
Applications
• Video Digitizing
• Wireless Communications
Pinout
(PDIP, SOIC)
TOP VIEW
Description
HI1172 is a 6-bit, CMOS A/D converter for video use. The
adoption of a 2-step parallel conversion achieves speeds of
20 MSPS minimum, 35 MSPS typical.
Ordering Information
PART
NUMBER
HI1172JCP -20 to 75 16 Ld PDIP E16.3A-S
HI1172JCB -20 to 75 16 Ld SOIC M16.2-S
HI1172
TEMP.
RANGE (oC) PACKAGE PKG. NO.
CLK
DV
D
D
D
D
D
D
SS
AV
1
0
2
1
3
2
4
3
5
4
6
5
7
8
16
SS
15
DV
DD
14
AV
DD
13
V
RB
12
V
IN
11
V
RT
10
AV
DD
9
DV
DD
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
4-1062
File Number 4102.1
Functional Block Diagram
HI1172
REFERENCE VOLTAGE
1
D0
2
CLK
D
D1
D2
D3
D4
D5
VSS
3
4
5
6
7
8
LOWER
DAT A
LATCHES
UPPER
DAT A
LATCHES
CLOCK GENERATOR
Typical Application Circuit
LOWER
ENCODER
(3-BIT)
LOWER
ENCODER
(3-BIT)
UPPER
ENCODER
(3-BIT)
LOWER
COMPARATORS WITH
S/H (3-BIT)
LOWER
COMPARATORS WITH
S/H (3-BIT)
UPPER
COMPARATORS WITH
S/H (3-BIT)
16
AV
SS
15
DV
DD
14
AV
DD
13
V
RB
12
V
IN
11
V
RT
10
AV
DD
9
DV
DD
+
-
V
IN
CLK
(LSB) D0
(MSB) D5
+5V
D1
D2
D3
D4
+
-
4-1063
V
RB
V
IN
V
RT
+
C1
0.1
+
-
C4
+
C2
0.1
C3
+5V
+5V
V
V
RT
RB
HI1172
Pin Descriptions
NUMBER SYMBOL EQUIVALENT CIRCUIT DESCRIPTION
1 to 6 D0 to D5 D0 (LSB) to D5 (MSB) Output.
D1
7 CLK Clock Input.
7
8DV
9, 15 DV
10, 14 AV
11 V
13 V
12 V
SS
DD
DD
RT
RB
11 13
IN
AV
DD
AV
AV
DV
DV
DD
SS
Digital GND.
Digital +5V.
Analog +5V.
Reference Voltage (Top).
DD
Reference Voltage (Bottom).
SS
Analog Input.
16 AV
SS
12
AV
SS
Analog GND.
4-1064
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