MAXIM MAX12528 Technical data

General Description

The MAX12528 is a dual 80Msps, 12-bit analog-to-digi­tal 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 frequen­cy (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-to­noise ratio (SNR) performance at a 175MHz input fre­quency. The T/H input stages accept single-ended or
differential inputs up to 400MHz. In addition to low oper­ating power, the MAX12528 features a 330µW power­down 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 refer­ence to be shared between the two ADCs. The refer­ence 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 differ­ential input clock. User-selectable divide-by-two (DIV2)
and divide-by-four (DIV4) modes allow for design flexibil­ity 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 out­puts accepts a 1.7V to 3.6V voltage for flexible interfac­ing 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 f

IN

= 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)

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3643; Rev 0; 4/05

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

Pin Configuration appears at end of data sheet.

*EP = Exposed paddle.

Selector Guide

PART

SAMPLING RATE

(Msps)

RESOLUTION

(Bits)

MAX12528 80 12

MAX12557 65 14

MAX12527 65 12

PART TEMP RANGE PIN-PACKAGE

MAX12528ETK -40°C to +85°C

68 Thin QFN-EP*

PKG

CODE

T6800-2

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VDDto GND ................................................................-0.3V to +3.6V

OV

DD

to GND............-0.3V to the lower of (VDD+ 0.3V) and +3.6V

INAP, INAN to GND ...-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

INBP, INBN to GND ...-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

CLKP, CLKN to

GND ........................-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

REFIN, REFOUT

to GND ..................-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

REFAP, REFAN,

COMA to GND ......-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

REFBP, REFBN,

COMB to GND ......-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

DIFFCLK/SECLK, G/T, PD, SHREF, DIV2,

DIV4 to GND .........-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

D0A–D11A, D0B–D11B, DAV,

DORA, DORB to GND..............................-0.3V to (OV

DD

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)
68-Pin Thin QFN 10mm x 10mm x 0.8mm

(derate 70mW/°C above +70°C) ....................................4000mW

Thermal Resistance θjc........................................................0.4°C/W

Operating Temperature Range................................-40°C to +85°C

Junction Temperature ...........................................................+150°C

Storage Temperature Range .................................-65°C to +150°C

Lead Temperature (soldering, 10s)......................................+300°C

DC ACCURACY

Resolution 12 Bits

Integral Nonlinearity INL fIN = 3MHz ±0.6 ±1.6 LSB

Differential Nonlinearity DNL fIN = 3MHz, no missing codes ±0.3 ±0.85 LSB
Offset Error ±0.1 ±0.7 %FSR

Gain Error ±0.5 ±4.3 %FSR

ANALOG INPUT (INAP, INAN, INBP, INBN)

Differential Input Voltage Range V

Common-Mode Input Voltage V

Analog Input Resistance R

Analog Input Capacitance

CONVERSION RATE

Maximum Clock Frequency f

Minimum Clock Frequency 5 MHz

Data Latency Figure 5 8

DYNAMIC CHARACTERISTICS

Small-Signal Noise Floor SSNF Input at -35dBFS 71.0 72.1 dBFS

Signal-to-Noise Ratio SNR

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIFF

C

PAR

C

SAMPLE

CLK

IN

Differential or single-ended inputs ±1.024 V

Each input (Figure 3) 2 kΩ

Fixed capacitance to ground,
each input (Figure 3)

Switched capacitance,
each input (Figure 3)

fIN = 3MHz at -0.5dBFS 69.3 71.2

fIN = 40MHz at -0.5dBFS 70.7

fIN = 70MHz at -0.5dBFS 70.7

f

= 175MHz at -0.5dBFS 67.1 69.8

IN

/ 2 V

DD

2

4.5

80 MHz

pF

Clock

Cycles

dB

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Signal-to-Noise Plus Distortion SINAD

Spurious-Free Dynamic Range SFDR

Total Harmonic Distortion THD

Second Harmonic HD2

Third Harmonic HD3

Two-Tone Intermodulation
Distortion (Note 2)

3rd-Order Intermodulation
Distortion

Two-Tone Spurious-Free
Dynamic Range

Full-Power Bandwidth FPBW Input at -0.2dBFS, -3dB rolloff 750 MHz

Aperture Delay t

Aperture Jitter t

Output Noise n

fIN = 3MHz at -0.5dBFS 68.9 70.8

fIN = 40MHz at -0.5dBFS 70.2

fIN = 70MHz at -0.5dBFS 69.6

= 175MHz at -0.5dBFS 64.6 67.7

f

IN

fIN = 3MHz at -0.5dBFS 74.7 85.6

fIN = 40MHz at -0.5dBFS 81.8

fIN = 70MHz at -0.5dBFS 78.2

f

= 175MHz at -0.5dBFS 67.2 72.9

IN

fIN = 3MHz at -0.5dBFS -84.2 -73.3

fIN = 40MHz at -0.5dBFS -79.3

fIN = 70MHz at -0.5dBFS -75.8

f

= 175MHz at -0.5dBFS -71.9 -66.4

IN

fIN = 3MHz at -0.5dBFS -87.2

fIN = 40MHz at -0.5dBFS -85.2

fIN = 70MHz at -0.5dBFS -85

= 175MHz at -0.5dBFS -81.5

f

IN

fIN = 3MHz at -0.5dBFS -92.1

fIN = 40MHz at -0.5dBFS -85.5

fIN = 70MHz at -0.5dBFS -78.2

= 175MHz at -0.5dBFS -72.9

f

IN

f

= 68.5MHz at -7dBFS

IN1

f

= 71.5MHz at -7dBFS

TTIMD

IM3

SFDR

AD

AJ

OUT

IN2

f

= 172.5MHz at -7dBFS

IN1

f

= 177.5MHz at -7dBFS

IN2

f

= 68.5MHz at -7dBFS

IN1

f

= 71.5MHz at -7dBFS

IN2

f

= 172.5MHz at -7dBFS

IN1

f

= 177.5MHz at -7dBFS

IN2

f

= 68.5MHz at -7dBFS

IN1

= 71.5MHz at -7dBFS

f

IN2

TT

f

= 172.5MHz at -7dBFS

IN1

= 177.5MHz at -7dBFS

f

IN2

Figure 5 1.2 ns

INAP = INAN = COMA
INBP = INBN = COMB

-77.5

-72.8

-78.6

-74.3

78.6

74.3

<0.15 ps

0.3 LSB

dB

dBc

dBc

dBc

dBc

dBc

dBc

dBc

RMS

RMS

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Overdrive Recovery Time ±10% beyond full scale 1

INTERCHANNEL CHARACTERISTICS

Crosstalk Rejection

Gain Matching ±0.01 ±0.1 dB

Offset Matching ±0.01 %FSR

INTERNAL REFERENCE (REFOUT)

REFOUT Output Voltage V

REFOUT Load Regulation -1mA < I

REFOUT Temperature Coefficient TC

REFOUT Short-Circuit Current

BUFFERED REFERENCE MODE (REFIN is driven by REFOUT or an external 2.048V single-ended reference source;
V

REFAP/VREFAN/VCOMA

REFIN Input Voltage V

REFIN Input Resistance R

COM_ Output Voltage

REF_P Output Voltage

REF_N Output Voltage

Differential Reference Voltage

Differential Reference
Temperature Coefficient

UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V
externally, V

COMA

= V

REF_P Input Voltage

REF_N Input Voltage

COM_ Input Voltage V

Differential Reference Voltage

REFOUT

REF

f

or f

INA

INB

f

or f

INA

INB

REFOUT

= 70MHz at -0.5dBFS 90

= 175MHz at -0.5dBFS 85

< +1mA 35 mV/mA

Short to VDD—sinking 0.24

Short to GND—sourcing 2.1

and V

COMB

REFBP/VREFBN/VCOMB

REFIN

REFIN

V

COMA

V

COMB

V

REFAP

V

REFBP

V

REFAN

V

REFBN

V

REFA

V

REFB

TC

REF

= VDD / 2)

V

REFAP

V

REFBP

V

REFAN

V

REFBN

COM

V

REFA

V

REFB

are generated internally)

VDD / 2 1.60 1.65 1.70 V

VDD / 2 + (V

VDD / 2 - (V

V

= V

REFA

V

= V

REFB

V

- V

REF_P

V

- V

REF_N

x 3/8) 2.418 V

REFIN

x 3/8) 0.882 V

REFIN

- V

REFAP

REFBP

COM

COM

REFAN

- V

REFBN

REFAP/VREFAN/VCOMA

and V

VDD / 2 1.65 V

V

REF_

= V

REF_P

- V

REF_N

= V

x 3/4 1.536 V

REFIN

1.995 2.048 2.075 V

65 ppm/°C

2.048 V

>50 MΩ

1.440 1.536 1.590 V

30 ppm/°C

REFBP/VREFBN/VCOMB

are applied

+0.768 V

-0.768 V

Clock

cycle

dB

mA

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

REF_P Sink Current

REF_N Source Current

COM_ Sink Current

REF_P, REF_N Capacitance

COM_ Capacitance C

CLOCK INPUTS (CLKP, CLKN)

Single-Ended Input High
Threshold
Single-Ended Input Low
Threshold

Minimum Differential Clock Input
Voltage Swing

Differential Input Common-Mode
Voltage

CLK_ Input Resistance R

CLK_ Input Capacitance C

DIGITAL INPUTS (DIFFCLK/SECLK, G/T, PD, DIV2, DIV4)

Input High Threshold V

Input Low Threshold V

Input Leakage Current

Digital Input Capacitance C

DIGITAL OUTPUTS (D0A–D11A, D0B–D11B, DORA, DORB, DAV)

Output-Voltage Low V

Output-Voltage High V

Three-State Leakage Current
(Note 3)

I

REFAP

I

REFBP

I

REFAN

I

REFBN

I

COMA

I

COMB

C

REF_P

C

REF_N

COM_

V

V

CLK

CLK

,

IH

IL

IH

IL

V

= 2.418V 1.2 mA

REF_P

V

= 0.882V 0.85 mA

REF_N

V

= 1.65V 0.85 mA

COM_

DIFFCLK/SECLK = GND, CLKN = GND

DIFFCLK/SECLK = GND, CLKN = GND

DIFFCLK/SECLK = OV

DIFFCLK/SECLK = OV

DD

DD

Each input (Figure 4) 5 kΩ

Each input 2 pF

OVDD applied to input ±5

Input connected to ground ±5

DIN

D0A–D11A, D0B–D11B, DORA, DORB:
I

= 200µA

SINK

DAV: I

D0A–D11A, D0B–D11B, DORA, DORB:
I

SOURCE

DAV: I

= 600µA 0.2

SINK

OV

= 200µA

SOURCE

= 600µA

OV

OVDD applied to input ±5

Input connected to ground ±5

OH

I

LEAK

OL

0.8 x
V

DD

0.8 x

OV

DD

0.2

DD

0.2

13 pF

6pF

0.2 V

V

DD

DD

5pF

-

-

0.2 x
V

DD

/ 2 V

0.2 x

OV

DD

0.2

V

V

P-P

V

V

µA

V

V

µA

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

D 0A–D 11A, D O RA,
D 0B–D 11B and D ORB Thr ee- S tate
O utp ut C ap aci tance

DAV Three-State Output
Capacitance

POWER REQUIREMENTS

Analog Supply Voltage V

Digital Output Supply Voltage OV

Analog Supply Current I

Analog Power Dissipation P

Digital Output Supply Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

C

OUT

C

DAV

DD

VDD

VDD

OVDD

DD

( N ote 3) 3 pF

(Note 3) 6 pF

Normal operating mode
f

= 175MHz at -0.5dBFS,

IN

single-ended clock
(DIFFCLK/SECLK = GND)

Normal operating mode

= 175MHz at -0.5dBFS,

f

IN

differential clock
(DIFFCLK/SECLK = OV

Power-down mode (PD = OVDD)
clock idle

Normal operating mode
f

= 175MHz at -0.5dBFS,

IN

single-ended clock
(DIFFCLK/SECLK = GND)

Normal operating mode

= 175MHz at -0.5dBFS,

f

IN

differential clock
(DIFFCLK/SECLK = OV

Power-down mode (PD = OVDD)
clock idle

Normal operating mode

= 175MHz at -0.5dBFS

f

IN

Power-down mode (PD = OVDD)
clock idle

DD

DD

)

)

3.15 3.30 3.60 V

1.70 2.0 V

220

230 250

0.1

726

760 825

0.330

20.7

0.004

DD

V

mA

mW

mA

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

_______________________________________________________________________________________ 7

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈ 10pF at digital outputs, AIN= -0.5dBFS (differen­tial), DIFFCLK/SECLK = OV

DD

, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f

CLK

= 80MHz, TA= -40°C to

+85°C, unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 1)

Note 1: Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
Note 2: Two-tone intermodulation distortion measured with respect to a single-carrier amplitude, and not the peak-to-average input

power of both input tones.

Note 3: During power-down, D0A–D11A, D0B–D11B, DORA, DORB, and DAV are high impedance.
Note 4: Guaranteed by design and characterization.

Typical Operating Characteristics

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), CL≈ 5pF at digital outputs, AIN= -0.5dBFS,
DIFFCLK/SECLK = OVDD, PD = GND, G/T = GND, f

CLK

= 80MHz (50% duty cycle), TA= +25°C, unless otherwise noted.)

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dBFS)

30 35 402515 20105

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-120
0

FFT PLOT (16,384-POINT DATA RECORD)

MAX12528 toc01

f

CLK

= 80MHz

f

IN

= 2.99926758MHz

A

IN

= -0.46dBFS
SNR = 70.9dB
SINAD = 70.7dB
THD = -84dBc
SFDR = 85.5dBc
HD2 = -86dBc
HD3 = -101dBc

f

IN

HD2

HD3

FFT PLOT (32,768-POINT DATA RECORD)

MAX12528 toc02

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dBFS)

30 35 402515 20105

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-120
0

f

CLK

= 80MHz

f

IN

= 39.5092773MHz

A

IN

= -0.482dBFS
SNR = 71.1dB
SINAD = 70.5dB
THD = -79.1dBc
SFDR = 82.7dBc
HD2 = -87.6dBc
HD3 = -82.7dBc

f

IN

HD2

HD3

FFT PLOT (32,768-POINT DATA RECORD)

MAX12528 toc03

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dBFS)

30 35 402515 20105

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-120
0

f

CLK

= 80MHz

f

IN

= 69.8999023MHz

A

IN

= -0.437dBFS
SNR = 71dB
SINAD = 69.2dB
THD = -73.9dBc
SFDR = 74.6dBc
HD2 = -94.6dBc
HD3 = -74.6dBc

HD3

HD2

f

IN

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TIMING CHARACTERISTICS (Figure 5)

Clock Pulse-Width High t

Clock Pulse-Width Low t

Data-Valid Delay t

Data Setup Time Before Rising
Edge of DAV

Data Hold Time After Rising Edge
of DAV

Wake-Up Time from Power-Down t

CH

CL

DAV

t

SETUP

t

HOLD

WAKE

(Note 4) 5.0 ns

(Note 4) 5.5 ns

V

= 2.048V 10 ms

REFIN

6.2 ns

6.2 ns

5.3 ns

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), CL≈ 5pF at digital outputs, AIN= -0.5dBFS,
DIFFCLK/SECLK = OV

DD

, PD = GND, G/T = GND, f

CLK

= 80MHz (50% duty cycle), TA= +25°C, unless otherwise noted.)

FFT PLOT (32,768-POINT DATA RECORD)

0

-10

-20

-30

-40

-50

-60

-70

AMPLITUDE (dBFS)

-80

-90

-100

-110

-120

f

IN

0

ANALOG INPUT FREQUENCY (MHz)

f

= 80MHz

CLK

= 174.9780273MHz

f

IN

= -0.468dBFS

A

IN

SNR = 69.5dB
SINAD = 67.9dB
THD = -73.1dBc
SFDR = 75dBc
HD2 = -79.3dBc
HD3 = -75dBc

HD2

30 35 402515 20105

MAX12528 toc04

HD3

AMPLITUDE (dBFS)

0

-20

-40

-60

-80

-100

-120

TWO-TONE IMD PLOT

(16,384-POINT DATA RECORD)

f

CLK

f

IN1

f

IN2

A

2f

+ f

IN2

A
IM3 = -92.3dBc
IMD = -89.1dBc

IN1

f

IN1

0

f

IN2

ANALOG INPUT FREQUENCY (MHz)

= 65.00352MHz
= 68.49889MHz
= 71.49832MHz

= -6.96dBFS

IN1

= -7.02dBFS

IN2

(16,384-POINT DATA RECORD)

0

f

= 65.00352MHz

CLK

= 172.50293MHz

f

IN1

-20

= -6.99dBFS

A

MAX12528 toc05

30252015105

IN1

= 177.40198MHz

f

IN2

= -7.01dBFS

A

IN2

-40

IM3 = -88.9dBc
IMD = -82.2dBc

-60

f

AMPLITUDE (dBFS)

-100

-120

IN2

-80

0

ANALOG INPUT FREQUENCY (MHz)

- f

TWO-TONE IMD PLOT

f

IN2

IN1

f

IN1

f

MAX12528 toc06

+ f

IN1

IN2

30252015105

INTEGRAL NONLINEARITY

vs. DIGITAL OUTPUT CODE

1.0

f

= 80MHz

CLK

0.8

= 2.1655273MHz

f

0.6

0.4

0.2

0

INL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0

IN

3072 3584 409625601536 204810245120

DIGITAL OUTPUT CODE

MAX12528 toc07

DNL (LSB)

-THD, SFDR vs. ANALOG INPUT FREQUENCY
= 80MHz, AIN = -0.5dBFS)

(f

CLK

90

85

80

75

70

65

-THD, SFDR (dBc)

60

55

50

0400

SFDR

-THD

fIN (MHz)

MAX12528 toc10

350300200 250100 15050

DIFFERENTIAL NONLINEARITY

vs. DIGITAL OUTPUT CODE

1.0

f

= 80MHz

CLK

0.8

= 2.1655273MHz

f

IN

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

SNR, SINAD vs. ANALOG INPUT AMPLITUDE

(f

75

65

55

45

SNR, SINAD (dB)

35

25

15

CLK

-55 0

3072 3584 409625601536 204810245120

DIGITAL OUTPUT CODE

= 80MHz, fIN = 70MHz)

SNR

AIN (dBFS)

SINAD

-5-10-15-20-25-30-35-40-45-50

MAX12528 toc08

MAX12528 toc11

SNR, SINAD vs. ANALOG INPUT FREQUENCY

= 80MHz, AIN = -0.5dBFS)

(f

CLK

72

70

68

66

64

62

60

58

SNR, SINAD (dB)

56

54

52

50

0 400

fIN (MHz)

SINAD

-THD, SFDR vs. ANALOG INPUT AMPLITUDE
= 80MHz, fIN = 70MHz)

(f

90

80

70

60

50

-THD, SFDR (dB)
40

30

20

CLK

SFDR

-THD

-55 0
AIN (dBFS)

SNR

MAX12528 toc09

350300200 250100 15050

MAX12528 toc12

-5-10-15-20-25-30-35-40-45-50

MAX12528

Dual, 80Msps, 12-Bit, IF/Baseband ADC

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(VDD= 3.3V, OVDD= 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), CL≈ 5pF at digital outputs, AIN= -0.5dBFS,
DIFFCLK/SECLK = OV

DD

, PD = GND, G/T = GND, f

CLK

= 80MHz (50% duty cycle), TA= +25°C, unless otherwise noted.)

SNR, SINAD vs. ANALOG INPUT AMPLITUDE

75

65

55

45

SNR, SINAD (dB)

35

25

15

-55 0

= 80MHz, fIN = 175MHz)

(f

CLK

SNR

SINAD

AIN (dBFS)

-THD, SFDR vs. CLOCK SPEED
= 70MHz, AIN = -0.5dBFS)

(f

90

85

80

75

70

65

-THD, SFDR (dBc)
60

55

50

IN

SFDR

-THD

10 80

f

(MHz)

CLK

SNR, SINAD vs. ANALOG SUPPLY VOLTAGE

= 70MHz)

(f

75

70

65

60

SNR, SINAD (dB)

55

50

3.0 3.6

IN

SNR

SINAD

VDD (V)

MAX12528 toc13

-THD, SFDR (dBc)

-5-10-15-20-25-30-35-40-45-50

MAX12528 toc16

SNR, SINAD (dB)

706050403020

MAX12528 toc19

-THD, SFDR (dBc)

3.53.43.33.23.1

-THD, SFDR vs. ANALOG INPUT AMPLITUDE

90

80

70

60

50

40

30

20

-55 0

= 80MHz, fIN = 175MHz)

(f

CLK

SFDR

-THD

AIN (dBFS)

-5-10-15-20-25-30-35-40-45-50

SNR, SINAD vs. CLOCK SPEED

75

70

65

60

55

50

10 80

f

CLK

SNR

SINAD

706050403020

(MHz)

= 175MHz, AIN = -0.5dBFS)

(f

IN

-THD, SFDR vs. ANALOG SUPPLY VOLTAGE
= 70MHz)

(f

90

85

80

75

70

65

60

55

50

3.0 3.6

IN

SFDR

-THD

3.53.43.33.23.1

VDD (V)

MAX12528 toc14

SNR, SINAD (dB)

MAX12528 toc17

-THD, SFDR (dBc)

MAX12528 toc20

SNR, SINAD (dB)

SNR, SINAD vs. CLOCK SPEED

= 70MHz, AIN = -0.5dBFS)

(f

75

70

65

60

55

50

IN

SNR

SINAD

10 80

-THD, SFDR vs. CLOCK SPEED
= 175MHz, AIN = -0.5dBFS)

(f

IN

90

85

80

75

70

65

60

55

50

10 80

SNR, SINAD vs. ANALOG SUPPLY VOLTAGE

75

70

65

60

55

50

3.0 3.6

SFDR

-THD

(f

f

(MHz)

CLK

f

(MHz)

CLK

= 175MHz)

IN

SNR

SINAD

VDD (V)

706050403020

706050403020

3.53.43.33.23.1

MAX12528 toc15

MAX12528 toc18

MAX12528 toc21