4-1
Semiconductor
[ /Title (HI1826)
/Subject (6-Bit, 140 MSPS, Flash A/D Converter)
/Author ()
/Keywords (Harris Semiconductor, RGB, Video, Flat
Panel, LCD)
/Creator ()
/DOCINFO pdfmark
[ /PageMode /UseOutlines
/DOCVIEW pdfmark
October 1998
HI1826
6-Bit, 140 MSPS, Flash A/D Converter
Features
Ultra-High Speed Operation with Maximum
Conversion Rate. . . . . . . . . . . . . . . . . . . . . . . 140 MSPS
Low Input Capacitance . . . . . . . . . . . . . . . . . . . . . . . 7pF
Wide Analog Input Bandwidth (Min) . . . . . . . . 200MHz
Low Power Consumption . . . . . . . . . . . . . . . . . .225mW
Low Error Rate
Applications
RGB Graphics Processing
Digital Data Storage Read Channels
Digital Communications
Description
HI1826 is a 6-bit, 140 MSPS, flash A/D converter IC capable
of digitizing analog signals at the maximum rate of 140
MSPS. The digital input/output level is compatible with the
ECL 100K/10KH/10K.
Pinout
HI1826
(MQFP)
TOP VIEW
Ordering Information
PART
NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG. NO.
HI1826JCQ
-20 to 75
32 Ld MQFP
Q32.7x7-S
A
GND
AV
EE
NC
INV
DV
EE
D5 (MSB)
D4
D3
A
GND
AV
EE
CLKN
CLKP
DV
EE
D0 (LSB)
D1
D2
DGND1
DGND2
NC
NC
NC
NC
DGND2
DGND1
V
RTS
V
RT
AGND
NC
V
IN
AGND
V
RB
V
RBS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
17
18
19
20
21
22
23
24
32 31 30 29 28 27 26 25
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
Harris Corporation 1998
File Number
4107.2
NOT RECOMMENDED FOR NEW DESIGNS
See HI3086
4-2
Block Diagram
18
17
20
24
23
8
7
19
12
15
11
10
9
32
31
30
27
28
13
COMPARATOR ARRAY
ENCODER LOGIC
EXOR ARRAY
OUTPUT BUFFER
6
6
CLK DRIVER
V
RB
V
RBS
V
IN
V
RTS
V
RT
DGND1
DGND2
AGND
DV
EE
AV
EE
INV
CLKP
CLKN
D0
(LSB)
D1
D2
D3
D4
D5
(MSB)
REFERENCE RESISTANCE
HI1826
4-3
Pin Descriptions
PIN NO.
SYMBOL
I/O
TYPICAL
VOLTAGE
LEVEL
EQUIVALENT CIRCUIT
DESCRIPTION
16, 19,
22, 25
AGND
-
0V
Analog GND. Used as GND for input
buffers and latches of comparators.
Separated from DGND1 and DGND2.
15, 26
AV
EE
-
-5.2V
Analog V
EE
. Typical voltage is -5.2V.
Connected internally with DV
EE
.
(Resistance is 4 to 6
.) Connect to
AGND through a ceramic chip capacitor
of 0.1
F or more just near the pin.
28
CLKP
I
ECL
CLK Input.
27
CLKN
CLK Complementary Input. When left
open, voltage goes to ECL threshold
potential (-1.3V). Although only CLKP
input can be used for operation with
CLKN input open, complementary input
is recommended in order to attain high
speed and stable operation.
1, 8
DGND1
-
0V
Digital GND for Internal Circuits.
2, 7
DGND2
-
0V
Digital GND for Output Transistors.
12, 29
DV
EE
-
-5.2V
Digital V
EE
. Connected internally with
AV
EE
. (Resistance is 4 to 6
.) Connect
to DGND through a ceramic chip
capacitor of 0.1
F or more just near the
pin.
30
D0
O
ECL
LSB of Data Output. External pull-down
resistor is required.
31
D1
Data Output. External pull-down resistors
are required.
32
D2
9
D3
10
D4
11
D5
MSB of Data Output. External pull-down
resistor is required.
DGND1
CLKP
CLKN
DV
EE
R
R
R
R
R
R
DV
EE
Di
DGND2
HI1826
4-4
13
INV
I
ECL
Output polarity inversion input for D0
(LSB) to D5 (MSB). (Refer to the output
code table.) When left open, Low levels
maintained.
20
V
IN
I
V
RT
to V
RB
Analog Input.
18
V
RB
I
-2V
Reference Voltage (Bottom) Force;
typical voltage is -2V. Connect to AGND
through a ceramic chip capacitor of
0.1
F or more and a tantalum capacitor
of 10
F or more just near the pin.
17
V
RBS
Reference Voltage (Bottom) Sense.
23
V
RT
I
0V
Reference Voltage (Top) Force; typical
voltage is 0V. When applying a voltage
other than AGND to this pin, connect to
AGND through a ceramic chip capacitor of
0.1
F for more and a tantalum capacitor of
10
F or more just near the pin.
24
V
RTS
Reference Voltage (Top) Sense.
3, 4
5, 6
14, 21
NC
-
-
Not Connected. Although not connected
in the IC, it is recommended that these
pins should be connected to AGND or
DGND on printed circuit board.
Pin Descriptions
(Continued)
PIN NO.
SYMBOL
I/O
TYPICAL
VOLTAGE
LEVEL
EQUIVALENT CIRCUIT
DESCRIPTION
DGND1
INV
-1.3V
R
R
R
R
DV
EE
AV
EE
V
IN
AGND
V
RT
V
RTS
V
RBS
V
RB
R
R
R
R
R
R
R
R
R3
R1
COMPARATOR 2
COMPARATOR 1
COMPARATOR 30
COMPARATOR 31
COMPARATOR 32
COMPARATOR 33
COMPARATOR 63
HI1826
4-5
Absolute Maximum Ratings
T
A
= 25
o
C
Thermal Information
Supply Voltage (AV
EE
) . . . . . . . . . . . . . . . . . . . . . . . . . . -7V to 0.5V
Reference Voltage (V
RT
, V
RB
) . . . . . . . . . . . . . . . . . . . -1.5V to 0.5V
| V
RT
- V
RB
| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V
Analog Input Voltage (V
IN
) . . . . . . . . . . . . . . . . . . . . . . -2.7V to 0.5V
Digital Input Voltage (CLKP, CLKN, INV) . . . . . . . . . . . . -4V to 0.5V
| CLKP - CLKN | . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V
Digital Output Current (I
D0
to I
D5
) . . . . . . . . . . . . . . . -30mA to 0mA
Operating Conditions
Temperature Range (T
A
) . . . . . . . . . . . . . . . . . . . . . . -20
o
C to 75
o
C
Supply Voltage
AV
EE
, DV
EE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5.5V to -4.95V
AV
EE
, DV
EE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.05V to 0.05V
AGND, DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.05V to 0.05V
Reference Voltage
V
RT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.1V to 0.1V
V
RB
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.2V to -1.8V
Analog Input Voltage (V
IN
) . . . . . . . . . . . . . . . . . . . . . . . V
RB
to V
RT
Clock Pulse Width
t
PW1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0ns
t
PW0
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0ns
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . .
122
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . .-65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
(Lead Tips Only)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
V
DD
= +5V, V
RB
= 1.0V, V
RT
= 2.0V, T
A
= 25
o
C
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Resolution
n
6
6
6
bits
DC CHARACTERISTICS
Integral Linearity Error
E
IL
f
C
= 140MHz
-0.25
-
+0.25
LSB
Differential Linearity Error
E
DL
f
C
= 140MHz
-0.25
-
+0.25
LSB
ANALOG INPUT
Analog Input Capacitance
C
IN
V
IN
= -1V + 0.07V
RMS
-
7
18
pF
Analog Input Resistance
R
IN
300
-
-
k
Input Bias Current
I
IN
V
IN
= -1V
-
-
400
A
REFERENCE INPUT
Reference Resistance
R
REF
-
200
-
Offset Voltage
V
RT
E
OT
-
-
20
mV
V
RB
E
OB
-
-
20
mV
DIGITAL INPUT
Logic High Level
V
IH
-1.13
-
-0.65
V
Logic Low Level
V
IL
-2.1
-
-1.5
V
Logic High Current
I
IH
Apply -0.8V to Input
0
-
50
A
Logic Low Current
I
IL
Apply -1.6V to Input
-50
-
50
A
Input Capacitance
-
7
pF
SWITCHING CHARACTERISTICS
Maximum Conversion Frequency
f
C
Error rate 1E-9 TPS (Note 1)
140
-
-
MSPS
Aperture Jitter
t
AJ
-
10
-
ps
HI1826
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