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PDF MAX1211 Data sheet ( Hoja de datos )
| Número de pieza | MAX1211 | |
| Descripción | IF Sampling ADC | |
| Fabricantes | Maxim Integrated | |
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19-2922; Rev 1; 5/04
EVAALVUAAILTAIOBNLEKIT
65Msps, 12-Bit, IF Sampling ADC
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 fIN = 175MHz
79.7dBc SFDR at fIN = 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)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1211ETL -40°C to +85°C 40 Thin QFN (6mm x 6mm)
Pin Configuration
TOP VIEW
REFP 1
REFN 2
COM 3
GND 4
INP 5
INN 6
GND 7
DCE 8
CLKN 9
CLKP 10
MAX1211
EXPOSED PADDLE (GND)
30 D0
29 D1
28 D2
27 D3
26 D4
25 D5
24 D6
23 D7
22 D8
21 D9
THIN QFN
6mm × 6mm × 0.8mm
________________________________________________________________ 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.
1 page  
65Msps, 12-Bit, IF Sampling ADC
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), CREFOUT = 0.1µF, CL ≈ 5pF at digital outputs, VIN = -
0.5dBFS, CLKTYP = high, DCE = high, PD = low, G/T = low, fCLK = 65MHz (50% duty cycle), CREFP = CREFN = 0.1µF, 1µF in parallel with
10µF between REFP and REFN, CCOM = 0.1µF in parallel with 2.2µF to GND, TA = -40°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
DIGITAL OUTPUTS (D0–D11, DAV, DOR)
Output-Voltage Low
VOL
CONDITIONS
D0–D11, DOR, ISINK = 200µA
DAV, ISINK = 600µA
Output-Voltage High
VOH
D0–D11, DOR, ISOURCE = 200µA
DAV, ISOURCE = 600µA
Tri-State Leakage Current
D11–D0, DOR Tri-State Output
Capacitance
DAV Tri-State Output
Capacitance
POWER REQUIREMENTS
Analog Supply Voltage
ILEAK
COUT
(Note 4)
(Note 4)
CDAV (Note 4)
VDD
Digital Output Supply Voltage
OVDD
Normal operating mode,
fIN = 175MHz at -0.5dBFS,
CLKTYP = GND, single-ended clock
MIN TYP MAX UNITS
OVDD
- 0.2
OVDD
- 0.2
0.2
V
0.2
V
±5 µA
3 pF
6 pF
3.0 3.3 3.6
V
1.7 2.0 VDD
V
+ 0.3V
95
Analog Supply Current
IVDD
Normal operating mode,
fIN = 175MHz at -0.5dBFS,
CLKTYP = OVDD, differential clock
Power-down mode; clock idle,
PD = OVDD
Normal operating mode,
fIN = 175MHz at -0.5dBFS,
CLKTYP = GND, single-ended clock
103 115
mA
0.045
314
Analog Power Dissipation
Digital Output Supply Current
PDISS
IOVDD
Normal operating mode,
fIN = 175MHz at -0.5dBFS,
CLKTYP = OVDD, differential clock
Power-down mode, clock idle,
PD = OVDD
Normal operating mode,
fIN = 175MHz at -0.5dBFS,
OVDD = 2.0V, CL ≈ 5pF
Power-down mode; clock idle,
PD = OVDD
mW
340 379
0.15
9.2 mA
6 µA
_______________________________________________________________________________________ 5
5 Page 
65Msps, 12-Bit, IF Sampling ADC
Typical Operating Characteristics (continued)
(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), CREFOUT = 0.1µF, CL ≈ 5pF at digital outputs, differential
input at -0.5dBFS, DCE = high, CLKTYP = high, PD = low, G/T = low, fCLK ≈ 65MHz (50% duty cycle), CREFP = CREFN = 0.1µF to GND,
1µF in parallel with 10µF between REFP and REFN, CCOM = 0.1µF in parallel with 2.2µF to GND, TA = +25°C, unless otherwise noted.)
SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
70
69
68
67
66
65
64
63
62
61
60
0
50 100 150 200
ANALOG INPUT FREQUENCY (MHz)
250
SIGNAL-TO-NOISE + DISTORTION
vs. ANALOG INPUT FREQUENCY
70
69
68
67
66
65
64
63
62
61
60
0
50 100 150 200
ANALOG INPUT FREQUENCY (MHz)
250
TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
-40
-50
-60
-70
-80
-90
-100
0
50 100 150 200
ANALOG INPUT FREQUENCY (MHz)
250
SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
100
90
80
70
60
50
40
0
50 100 150 200
ANALOG INPUT FREQUENCY (MHz)
250
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX1211.PDF ] | |
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