19-3029; Rev 1; 2/04
1.8V, 10-Bit, 250Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
General Description
Features
The MAX1124 is a monolithic 10-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.
♦ 250Msps Conversion Rate
♦ SNR = 56.8dB/55.5dB at f = 100MHz/500MHz
IN
♦ SFDR = 71dBc/63.8dBc at f = 100MHz/500MHz
IN
♦ NPR = 54.8dB at f
= 28.8MHz
NOTCH
At 250Msps and an input frequency of 100MHz, the
MAX1124 achieves a spurious-free dynamic range
(SFDR) of 71dBc. Its excellent signal-to-noise ratio
(SNR) of 57.1dB at 10MHz remains flat (within 1dB) for
input tones up to 500MHz. This makes the MAX1124
ideal for wideband applications such as digital predis-
tortion in cellular base-station transceiver systems.
♦ 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)
The MAX1124 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.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1124EGK
-40°C to +85°C
68 QFN-EP*
*EP = Exposed paddle.
The MAX1124 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.
Pin Configuration
For pin-compatible, lower speed versions of the
MAX1124, refer to the MAX1122 (170Msps) and the
MAX1123 (210Msps) data sheets. For a pin-compatible
8-bit version of the MAX1124, refer to the MAX1121
data sheet.
TOP VIEW
68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
AV
1
2
3
4
5
6
7
8
9
51 D6P
50 D6N
49 D5P
48 D5N
47 D4P
46 D4N
45 OGND
Applications
Wireless and Wired Broadband Communication
Cable-Head End Systems
CC
EP
AGND
REFIO
REFADJ
AGND
AV
CC
Digital Predistortion Receivers
AGND
INP
Communications Test Equipment
44 OV
CC
INN
43 DCLKP
42 DCLKN
MAX1124
Radar and Satellite Subsystems Antenna Array
Processing
AGND 10
AV
AV
AV
AV
11
12
13
14
41 OV
CC
CC
CC
CC
CC
40 D3P
39 D3N
38 D2P
37 D2N
36 D1P
35 D1N
AGND 15
AGND 16
CLKDIV 17
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
________________________________________________________________ Maxim Integrated Products
1
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.