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What is MAX12528?

This electronic component, produced by the manufacturer "Maxim Integrated Products", performs the same function as "Dual 80Msps 12-Bit IF/Baseband ADC".


MAX12528 Datasheet PDF - Maxim Integrated Products

Part Number MAX12528
Description Dual 80Msps 12-Bit IF/Baseband ADC
Manufacturers Maxim Integrated Products 
Logo Maxim Integrated Products Logo 


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19-3643; Rev 0; 4/05
EVAALVUAAILTAIOBNLEKIT
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Dual, 80Msps, 12-Bit, IF/Baseband ADC
General Description
The MAX12528 is a dual 80Msps, 12-bit analog-to-digi-
tal converter (ADC) featuring fully differential wideband
track-and-hold (T/H) inputs, driving internal quantizers.
The MAX12528 is optimized for low power, small size,
and high dynamic performance in intermediate frequen-
cy (IF) and baseband sampling applications. This dual
ADC operates from a single 3.3V supply, consuming
only 726mW while delivering a typical 69.8dB signal-to-
noise ratio (SNR) performance at a 175MHz input fre-
quency. The T/H input stages accept single-ended or
differential inputs up to 400MHz. In addition to low oper-
ating power, the MAX12528 features a 330µW power-
down mode to conserve power during idle periods.
A flexible reference structure allows the MAX12528 to
use the internal 2.048V bandgap reference or accept
an externally applied reference and allows the refer-
ence to be shared between the two ADCs. The refer-
ence structure allows the full-scale analog input range
to be adjusted from ±0.35V to ±1.15V. The MAX12528
provides a common-mode reference to simplify design
and reduce external component count in differential
analog input circuits.
The MAX12528 supports either a single-ended or differ-
ential input clock. User-selectable divide-by-two (DIV2)
and divide-by-four (DIV4) modes allow for design flexibil-
ity and help eliminate the negative effects of clock jitter.
Wide variations in the clock duty cycle are compensated
with the ADC’s internal duty-cycle equalizer (DCE).
The MAX12528 features two parallel, 12-bit-wide,
CMOS-compatible outputs. The digital output format is
pin-selectable to be either two’s complement or Gray
code. A separate power-supply input for the digital out-
puts accepts a 1.7V to 3.6V voltage for flexible interfac-
ing with various logic levels. The MAX12528 is available
in a 10mm x 10mm x 0.8mm, 68-pin thin QFN package
with exposed paddle (EP), and is specified for the
extended (-40°C to +85°C) temperature range.
Applications
IF and Baseband Communication Receivers
Cellular, LMDS, Point-to-Point Microwave,
MMDS, HFC, WLAN
I/Q Receivers
Medical Imaging
Portable Instrumentation
Digital Set-Top Boxes
Low-Power Data Acquisition
Features
Direct IF Sampling Up to 400MHz
Excellent Dynamic Performance
70.7dB/69.8dB SNR at fIN = 70MHz/175MHz
78.2dBc/72.9dBc SFDR at fIN = 70MHz/175MHz
3.3V Low-Power Operation
760mW (Differential Clock Mode)
726mW (Single-Ended Clock Mode)
Fully Differential or Single-Ended Analog Input
Adjustable Differential Analog Input Voltage
750MHz Input Bandwidth
Internal, External, or Shared Reference
Differential or Single-Ended Clock
Accepts 25% to 75% Clock Duty Cycle
User-Selectable DIV2 and DIV4 Clock Modes
Power-Down Mode
CMOS Outputs in Two’s Complement or Gray
Code
Out-of-Range and Data-Valid Indicators
Compact, 68-Pin Thin QFN Package (10mm x
10mm x 0.8mm)
Evaluation Kit Available (Order MAX12528EVKIT)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX12528ETK -40°C to +85°C 68 Thin QFN-EP*
*EP = Exposed paddle.
PKG
CODE
T6800-2
PART
MAX12528
MAX12557
MAX12527
Selector Guide
SAMPLING RATE
(Msps)
80
65
65
RESOLUTION
(Bits)
12
14
12
Pin Configuration appears at end of data sheet.
________________________________________________________________ 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.

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MAX12528 equivalent
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Dual, 80Msps, 12-Bit, IF/Baseband ADC
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL 10pF at digital outputs, AIN = -0.5dBFS (differen-
tial), DIFFCLK/SECLK = OVDD, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, fCLK = 80MHz, TA = -40°C to
+85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
REF_P Sink Current
REF_N Source Current
COM_ Sink Current
REF_P, REF_N Capacitance
COM_ Capacitance
CLOCK INPUTS (CLKP, CLKN)
Single-Ended Input High
Threshold
Single-Ended Input Low
Threshold
Minimum Differential Clock Input
Voltage Swing
SYMBOL
CONDITIONS
IREFAP
IREFBP
VREF_P = 2.418V
IREFAN
IREFBN
VREF_N = 0.882V
ICOMA
ICOMB
VCOM_ = 1.65V
CREF_P,
CREF_N
CCOM_
VIH DIFFCLK/SECLK = GND, CLKN = GND
VIL DIFFCLK/SECLK = GND, CLKN = GND
DIFFCLK/SECLK = OVDD
Differential Input Common-Mode
Voltage
DIFFCLK/SECLK = OVDD
CLK_ Input Resistance
RCLK Each input (Figure 4)
CLK_ Input Capacitance
CCLK Each input
DIGITAL INPUTS (DIFFCLK/SECLK, G/T, PD, DIV2, DIV4)
Input High Threshold
VIH
Input Low Threshold
VIL
Input Leakage Current
OVDD applied to input
Input connected to ground
Digital Input Capacitance
CDIN
DIGITAL OUTPUTS (D0A–D11A, D0B–D11B, DORA, DORB, DAV)
Output-Voltage Low
D0A–D11A, D0B–D11B, DORA, DORB:
VOL ISINK = 200µA
DAV: ISINK = 600µA
Output-Voltage High
VOH
D0A–D11A, D0B–D11B, DORA, DORB:
ISOURCE = 200µA
DAV: ISOURCE = 600µA
Three-State Leakage Current
(Note 3)
ILEAK
OVDD applied to input
Input connected to ground
MIN TYP MAX UNITS
1.2 mA
0.85 mA
0.85 mA
13 pF
6 pF
0.8 x
VDD
0.2 x
VDD
V
V
0.2 VP-P
VDD / 2
5
2
V
k
pF
0.8 x
OVDD
0.2 x
OVDD
±5
±5
V
V
µA
5 pF
OVDD -
0.2
OVDD -
0.2
±5
±5
0.2
0.2
V
V
µA
_______________________________________________________________________________________ 5


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