MAX1114 Datasheet, PDF (5/12 Pages) Maxim Integrated Products – 8-Bit, 150Msps Flash ADC

8-Bit, 150Msps Flash ADC
______________________________________________________________Pin Description
PIN
Ceramic SB
1, 4, 17, 25, 26, 38, 39
CERQUAD
3, 7, 12, 22, 27, 32
2, 19, 22, 24, 27, 28, 36,
37, 40, 42
28, 30
3
31
5, 16, 29, 31, 33, 35
2, 8, 9, 14, 16, 18, 20,
25, 26, 33
6, 15
7
8–13
14
18
—
20
21
—
23
1, 34
36
37–42
43
4
44
5
6
10
11
30, 34
15, 19
—
13
32
17
—
21
41
23
—
24
—
29
—
35
NAME
FUNCTION
VEE
N.C.
LINV
AGND
DGND
D0
D1–D6
D7
MINV
D8
CLK
CLK
VRBS
VRBF
VIN
VR1
VR2
VR3
VRTF
VRTS
DRINV
DREADY
Negative Analog Supply (nominally -5.2V)
No Connect. Not internally connected.
D0–D6 Output Conversion Control
Analog Ground
Digital Ground
Digital Data Output (LSB)
Digital Data Outputs
Digital Data Output (MSB)
D7 Output Conversion Control
Overrange Output
Inverse ECL Clock Input Pin
ECL Clock Input Pin
Reference Voltage Bottom, Sense
Reference Voltage Bottom, Force
Analog Input. Can be connected to the input
signal or used as a sense.
Reference Voltage Tap 1 (typically -1.5V)
Reference Voltage Tap 2 (typically -1V)
Reference Voltage Tap 3 (typically -0.5V)
Reference Voltage Top, Force
Reference Voltage Top, Sense
Data-Ready Inverse
Data-Ready Output
_______________Detailed Description
The MAX1114 is a 150Msps, monolithic, 8-bit parallel
flash analog-to-digital converter (ADC) with an analog
bandwidth of over 200MHz. A major advance over pre-
vious flash converters is the inclusion of 256 input pre-
amplifiers between the reference ladder and input
comparators. (See Functional Diagram.) This feature
not only reduces clock-transient kickback to the input
and reference ladder due to a low AC beta, but also
reduces the effect of the dynamic state of the input sig-
nal on the latching characteristics of the input compara-
tors. The preamplifiers act as buffers and stabilize the
input capacitance so it remains constant for varying
input voltages and frequencies, making the part easier
to drive than previous flash converters. The MAX1114
incorporates a special decoding scheme that reduces
metastable errors (sparkle codes or flyers) to a maxi-
mum of 1LSB.
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