MAX1121 Maxim Integrated Products, MAX1121 Datasheet
MAX1121
Manufacturer Part Number
MAX1121
Description
250Msps Analog-to-Digital Converter
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1121.pdf
(17 pages)
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The MAX1121 is a monolithic 8-bit, 250Msps analog-to-
digital converter (ADC) optimized for outstanding
dynamic performance at high IF frequencies up to
500MHz. The product operates with conversion rates of
up to 250Msps while consuming only 477mW.
At 250Msps and an input frequency of 100MHz, the
MAX1121 achieves a spurious-free dynamic range
(SFDR) of 68dBc. Its excellent signal-to-noise ratio
(SNR) of 48.9dB at 10MHz remains flat (within 0.5dB)
for input tones up to 500MHz. This makes the MAX1121
ideal for wideband applications such as digital predis-
tortion in cellular base-station transceiver systems.
The MAX1121 requires a single 1.8V supply. The ana-
log input is designed for either differential or single-
ended operation and can be AC- or DC-coupled. The
ADC also features a selectable on-chip divide-by-2
clock circuit, which allows the user to apply clock fre-
quencies as high as 500MHz. This helps to reduce the
phase noise of the input clock source. A differential
LVDS sampling clock is recommended for best perfor-
mance. The converter’s digital outputs are LVDS com-
patible, and the data format can be selected to be
either two’s complement or offset binary.
The MAX1121 is available in a 68-pin QFN with
exposed paddle (EP) and is specified over the industri-
al (-40°C to +85°C) temperature range.
For pin-compatible, higher resolution versions of the
MAX1121, refer to the MAX1122 (170Msps), the
MAX1123 (210Msps), and the MAX1124 (250Msps)
data sheets.
19-3077; Rev 1; 2/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1.8V, 8-Bit, 250Msps Analog-to-Digital Converter
Wireless and Wired Broadband Communication
Digital Oscilloscopes
Digital Predistortion Receivers
Communications Test Equipment
Radar and Satellite Subsystems Antenna Array
Processing
Instrumentation
with LVDS Outputs for Wideband Applications
________________________________________________________________ Maxim Integrated Products
General Description
Applications
*EP = Exposed paddle.
REFADJ
CLKDIV
MAX1121EGK
AGND
REFIO
AGND
AGND
AGND
AGND
AGND
AV
AV
AV
AV
AV
AV
250Msps Conversion Rate
SNR = 48.8dB/48.7dB at f
SFDR = 68dBc/63.8dBc at f
Single 1.8V Supply
477mW Power Dissipation at 250Msps
On-Chip Track-and-Hold and Internal Reference
On-Chip Selectable Divide-by-2 Clock Input
LVDS Digital Outputs with Data Clock Output
Evaluation Kit Available (Order MAX1124EVKIT)
INP
INN
CC
CC
CC
CC
CC
CC
TOP VIEW
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
PART
68
18
67
19
EP
20
66
65
21
64
22
63
23
-40 C to +85 C
TEMP RANGE
Ordering Information
62
24
MAX1121
61
25
26
60
Pin Configuration
IN
27
59
IN
= 100MHz/500MHz
28
58
= 100MHz/500MHz
29
57
www.DataSheet4U.com
30
56
31
55
PIN-PACKAGE
68 QFN-EP*
32
54
Features
53
33
52
34
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
D4P
D4N
D3P
D3N
D2P
D2N
OGND
OV
DCLKP
DCLKN
OV
D1P
D1N
D0P
D0N
N.C.
N.C.
CC
CC
1
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