Rainbow-electronics MAX1122 User Manual

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General Description
The MAX1122 is a monolithic 10-bit, 170Msps 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 170Msps while consuming only 460mW.
At 170Msps and an input frequency of 100MHz, the
MAX1122 achieves a spurious-free dynamic range
(SFDR) of 72dBc. Its excellent signal-to-noise ratio
(SNR) of 57.5dB at 10MHz remains flat (within 1dB) for
input tones up to 500MHz. This makes the MAX1122
ideal for wideband applications such as digital predis-
tortion in cellular base-station transceiver systems.
The MAX1122 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 340MHz. 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 MAX1122 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 speed versions of the
MAX1122, refer to the MAX1123 (210Msps) and the
MAX1124 (250Msps) data sheets. For a higher speed,
pin-compatible 8-bit version of the MAX1122, 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
170Msps Conversion Rate
SNR = 57.1dB/56.5dB at f
IN
= 100MHz/500MHz
SFDR = 72dBc/63.5dBc at f
IN
= 100MHz/500MHz
NPR = 53.7dB at f
NOTCH
= 28.8MHz
Single 1.8V Supply
460mW Power Dissipation at 170Msps
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)
MAX1122
1.8V, 10-Bit, 170Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
________________________________________________________________ Maxim Integrated Products 1
5859606162 5455565763
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
5253
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
656667
AGND
AGND
AV
CC
68
T/B
2322212019 2726252418 2928 323130
D0N
D0P
3433
49
50
D6N
D5P
51 D6P
11
10
9
8
7
6
5
4
3
2
16
15
14
13
12
1
CLKDIV 17
MAX1122
EP
Pin Configuration
Ordering Information
19-3027; 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
MAX1122EGK -40°C to +85°C 68 QFN-EP*
*EP = Exposed paddle.
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1 2 3 4 5 6 ... 16 17

Summary of Contents

Page 1 - Ordering Information

General DescriptionThe MAX1122 is a monolithic 10-bit, 170Msps analog-to-digital converter (ADC) optimized for outstandingdynamic performance at high

Page 2 - ELECTRICAL CHARACTERISTICS

MAX1122Detailed Description—Theory of OperationThe MAX1122 uses a fully differential, pipelined archi-tecture that allows for high-speed conversion, o

Page 3

Analog Inputs (INP, INN)INP and INN are the fully differential inputs of theMAX1122. Differential inputs usually feature good rejec-tion of even-order

Page 4

MAX1122dynamic performance. The clock signal source must bea high-quality, low phase noise to avoid any degrada-tion in the noise performance of the A

Page 5

Digital Outputs (D0P/N–D9P/N, DCLKP/N,ORP/N) and Control Input T/BThe digital outputs D0P/N–D9P/N, DCLKP/N, andORP/N are LVDS compatible, and data onD

Page 6

MAX1122predetermined resistor value between REFADJ andREFIO increases the full-scale range of the data con-verter. Figure 6 shows the two possible con

Page 7 - PROPAGATION DELAY (ns)

networks of ferrite beads and capacitors to their corre-sponding grounds (AGND, OGND).To achieve optimum performance, provide each supplywith a separa

Page 8 - Pin Description

MAX1122Static Parameter DefinitionsIntegral Nonlinearity (INL)Integral nonlinearity is the deviation of the values on anactual transfer function from

Page 9 - Pin Description (continued)

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband ApplicationsMaxim cannot assume responsibility for use of any c

Page 10 - Detailed Description—Theory

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications2 _________________________________________________

Page 11 - Clock Inputs (CLKP, CLKN)

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications___________________________________________________

Page 12 - System Timing Requirements

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications4 _________________________________________________

Page 13 - Applications Information

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications___________________________________________________

Page 14 - Layout Considerations

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications6 _________________________________________________

Page 15

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications___________________________________________________

Page 16 - Lower Resolution Versions

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications8 _________________________________________________

Page 17 - Package Information

MAX11221.8V, 10-Bit, 170Msps Analog-to-Digital Converterwith LVDS Outputs for Wideband Applications___________________________________________________

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