Rainbow Electronics MAX1123 User Manual
General description, Applications, Features
General Description
The MAX1123 is a monolithic 10-bit, 210Msps 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 210Msps while consuming only 460mW.
At 210Msps and an input frequency of 100MHz, the
MAX1123 achieves a spurious-free dynamic range
(SFDR) of 74.5dBc. Its excellent signal-to-noise ratio
(SNR) of 57.4dB at 10MHz remains flat (within 1.5dB)
for input tones up to 500MHz. This makes the MAX1123
ideal for wideband applications such as digital predis-
tortion in cellular base-station transceiver systems.
The MAX1123 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 420MHz. 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 MAX1123 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, lower and higher speed versions of
the MAX1123, refer to the MAX1122 (170Msps) and the
MAX1124 (250Msps) data sheets. For a higher speed,
pin-compatible 8-bit version of the MAX1123, refer to
the MAX1121 data sheet.
Applications
Wireless and Wired Broadband Communication
Cable-Head End Systems
Digital Predistortion Receivers
Communications Test Equipment
Radar and Satellite Subsystems Antenna Array
Processing
Features
♦ 210Msps Conversion Rate
♦ SNR = 57.4dB/56dB at f
IN
= 100MHz/500MHz
♦ SFDR = 74.5dBc/62.6dBc at f
IN
= 100MHz/500MHz
♦ NPR = 53.6dB at f
NOTCH
= 28.8MHz
♦ Single 1.8V Supply
♦ 460mW Power Dissipation at 210Msps
♦ 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)
MAX1123
1.8V, 10-Bit, 210Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
________________________________________________________________
Maxim Integrated Products
1
58
59
60
61
62
54
55
56
57
63
38
39
40
41
42
43
44
45
46
47
AV
CC
AGND
AV
CC
TOP VIEW
AV
CC
OGND
OV
CC
ORP
ORN
D9P
D9N
D8P
D8N
52
53
D7P
D7N
AGND
AGND
AV
CC
CLKN
CLKP
AV
CC
AGND
OV
CC
OGND
N.C.
OV
CC
N.C.
N.C.
N.C.
D4P
D4N
OGND
OV
CC
DCLKP
DCLKN
OV
CC
D3P
D3N
D2P
35
36
37
D2N
D1P
D1N
AGND
INN
INP
AGND
AV
CC
AGND
AGND
AV
CC
AV
CC
AV
CC
AGND
REFADJ
REFIO
AGND
48
D5N
AV
CC
64
AGND
65
66
67
AGND
AGND
AV
CC
68
T/B
23
22
21
20
19
27
26
25
24
18
29
28
32
31
30
D0N
D0P
34
33
49
50
D6N
D5P
51
D6P
11
10
9
8
7
6
5
4
3
2
16
15
14
13
12
1
CLKDIV 17
MAX1123
EP
Pin Configuration
Ordering Information
19-3028; 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.
PART
TEMP RANGE
PIN-PACKAGE
MAX1123EGK
-40
°
C to +85
°
C
68 QFN-EP*
*EP = Exposed paddle.