Rainbow Electronics MAX1211 - Manual

General Description
The MAX1211 is a 3.3V, 12-bit analog-to-digital convert-
er (ADC) featuring a fully differential wideband track-
and-hold (T/H) input, driving the internal quantizer. The
MAX1211 is optimized for low power, small size, and
high dynamic performance in intermediate frequency
(IF) sampling applications. This ADC operates from a
single 3.0V to 3.6V supply, consuming only 340mW
while delivering a typical signal-to-noise ratio (SNR) per-
formance of 66.8dB at a 175MHz input frequency. The
T/H-driven input stage accepts single-ended or differen-
tial inputs. In addition to low operating power, the
MAX1211 features a 0.15mW power-down mode to con-
serve power during idle periods.
A flexible reference structure allows the MAX1211 to
use its internal precision bandgap reference or accept
an externally applied reference. A common-mode refer-
ence is provided to simplify design and reduce external
component count in differential analog input circuits.
The MAX1211 supports both a single-ended and differ-
ential input clock drive. Wide variations in the clock
duty cycle are compensated with the ADC’s internal
duty-cycle equalizer.
The MAX1211 features parallel, CMOS-compatible out-
puts. The digital output format is pin selectable to be
either two’s complement or Gray code. A data-valid indi-
cator eliminates external components that are normally
required for reliable digital interfacing. A separate power
input for the digital outputs accepts a voltage from 1.7V
to 3.6V for flexible interfacing with various logic levels.
The MAX1211 is available in a 6mm x 6mm x 0.8mm, 40-
pin thin QFN package with exposed paddle (EP), and is
specified for the extended industrial (-40°C to +85°C)
temperature range.
Applications
IF and Baseband Communication Receivers
Cellular, LMDS, Point-to-Point Microwave,
MMDS, HFC, WLAN
Ultrasound and Medical Imaging
Portable Instrumentation
Low-Power Data Acquisition
Features
♦
Direct IF Sampling Up to 400MHz
♦ 700MHz Input Bandwidth
♦
Excellent Dynamic Performance
66.8dB SNR at f IN = 175MHz
79.7dBc SFDR at f
IN
= 175MHz
♦
3.3V Low-Power Operation
314mW (Single-Ended Clock Mode)
340mW (Differential Clock Mode)
♦ Differential or Single-Ended Clock
♦ Accepts 20% to 80% Clock Duty Cycle
♦
Fully Differential or Single-Ended Analog Input
♦ Adjustable Full-Scale Analog Input Range
♦
Common-Mode Reference
♦ Power-Down Mode
♦
CMOS-Compatible Outputs in Two’s Complement
or Gray Code
♦
Data-Valid Indicator Simplifies Digital Interface
♦ Out-of-Range Indicator
♦
Miniature, 40-Pin Thin QFN Package with Exposed
Paddle
♦ Evaluation Kit Available (Order MAX1211EVKIT)
MAX1211
65Msps, 12-Bit, IF Sampling ADC
________________________________________________________________ Maxim Integrated Products 1
D0
D1
EXPOSED PADDLE (GND)
D3
D4
D7
D8
D9
D5
D6
D2 COM
GND
INP
INN
GND
DCE
CLKN
CLKP
REFN
REFP 1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16 17 18 19 20
40 39 38 37 36 35 34 33 32 31
30
29
28
27
26
25
24
23
22
21
V
DD
GND OV
DD
D11 D10 V
DD
V
DD
V
DD
CLKTYP
REFIN REFOUT PD V
DD
GND OV
DD
DAV I.C. I.C. G/T
THIN QFN
6mm × 6mm × 0.8mm
MAX1211
DOR
TOP VIEW
Pin Configuration
Ordering Information
19-2922; Rev 1; 5/04
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.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX1211ETL -40°C to +85°C 40 Thin QFN (6mm x 6mm)