MAXIM MAX12555 User Manual

General Description

The MAX12555 is a 3.3V, 14-bit, 95Msps analog-to-digital
converter (ADC) featuring a fully differential wideband
track-and-hold (T/H) input amplifier, driving a low-noise
internal quantizer. The analog input stage accepts single­ended or differential signals. The MAX12555 is optimized
for high dynamic performance, low power, and small
size. Excellent dynamic performance is maintained from
baseband to input frequencies of 175MHz and beyond,
making the MAX12555 ideal for intermediate­frequency (IF) sampling applications.

Powered from a single 3.3V supply, the MAX12555 con­sumes only 497mW while delivering a typical 72dB sig­nal-to-noise ratio (SNR) performance at a 175MHz input
frequency. In addition to low operating power, the
MAX12555 features a 300µW power-down mode to
conserve power during idle periods.

A flexible reference structure allows the MAX12555 to use
the internal 2.048V bandgap reference or accept an
externally applied reference. The reference structure
allows the full-scale analog input range to be adjusted
from ±0.35V to ±1.10V. The MAX12555 provides a com­mon-mode reference to simplify design and reduce exter­nal component count in differential analog input circuits.

The MAX12555 supports either a single-ended or differ­ential input clock. Wide variations in the clock duty
cycle are compensated with the ADC’s internal duty­cycle equalizer (DCE).

ADC conversion results are available through a 14-bit,
parallel, CMOS-compatible output bus. The digital out­put format is pin selectable to be either two’s comple­ment or Gray code. A data-valid indicator eliminates
external components that are normally required for reli­able digital interfacing. A separate digital power input
accepts a wide 1.7V to 3.6V supply, allowing the
MAX12555 to interface with various logic levels.

The MAX12555 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.

See the Pin-Compatible Versions table for a complete
family of 14-bit and 12-bit high-speed ADCs.

Applications

IF and Baseband Communication Receivers

Cellular, Point-to-Point Microwave, HFC, WLAN

Medical Imaging Including Positron Emission

Tomography (PET)

Video Imaging

Portable Instrumentation

Low-Power Data Acquisition

Features

♦ Direct IF Sampling Up to 400MHz

♦ Excellent Dynamic Performance

74dB/72dB SNR at fIN= 3MHz/175MHz

87.4dBc/76.2dBc SFDR at fIN= 3MHz/175MHz

♦ Low Noise Floor: 74.6dBFS

♦ 3.3V Low-Power Operation

465mW (Single-Ended Clock Mode)
497mW (Differential Clock Mode)
300µW (Power-Down Mode)

♦ Fully Differential or Single-Ended Analog Input

♦ Adjustable Full-Scale Analog Input Range

±0.35V to ±1.10V

♦ Common-Mode Reference

♦ CMOS-Compatible Outputs in Two’s Complement

or Gray Code

♦ Data-Valid Indicator Simplifies Digital Interface

♦ Data Out-of-Range Indicator

♦ Miniature, 6mm x 6mm x 0.8mm 40-Pin Thin QFN

Package with Exposed Paddle

♦ Evaluation Kit Available (Order MAX12555EVKIT)

MAX12555

14-Bit, 95Msps, 3.3V ADC

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3447; Rev 1; 2/05

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

PART*

PKG CODE

MAX12555ETL 40 Thin QFN T4066-3

MAX12555ETL+ 40 Thin QFN T4066-3

Pin-Compatible Versions

PART

SAMPLING

RATE

(Msps)

RESOLUTION

(BITS)

TARGET

APPLICATION

MAX12555

95 14

IF/Baseband

MAX12554

80 14

IF/Baseband

MAX12553

65 14

IF/Baseband

MAX19538

95 12

IF/Baseband

MAX1209

80 12 IF

MAX1211

65 12 IF

MAX1208

80 12 Baseband

MAX1207

65 12 Baseband

MAX1206

40 12 Baseband

Pin Configuration appears at end of data sheet.

+Denotes lead-free package.
*All devices specified over the -40°C to +85°C operating range.

PIN-PACKAGE

MAX12555

14-Bit, 95Msps, 3.3V ADC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/

T = low, f

CLK

= 95MHz (50% duty cycle, 1.4V

P-P

square wave), 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

INP, INN to GND ...-0.3V to the lower of (V

DD

+ 0.3V) and +3.6V

REFIN, REFOUT, REFP, REFN, COM

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

DD

+ 0.3V) and +3.6V

CLKP, CLKN, CLKTYP, G/T, DCE,

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

DD

+ 0.3V) and +3.6V

D13–D0, DAV, DOR to GND....................-0.3V to (OV

DD

+ 0.3V)

Continuous Power Dissipation (TA= +70°C)

40-Pin Thin QFN 6mm x 6mm x 0.8mm

(derated 26.3mW/°C above +70°C)........................2105.3mW

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DC ACCURACY (Note 2)

Resolution 14 Bits

Integral Nonlinearity INL fIN = 3MHz

LSB

Differential Nonlinearity DNL fIN = 3MHz

LSB

Offset Error V

REFIN

= 2.048V

%FS

Gain Error V

REFIN

= 2.048V

%FS

ANALOG INPUT (INP, INN)

Differential Input Voltage Range V

DIFF

Differential or single-ended inputs

V

Common-Mode Input Voltage

V

C

PAR

Fixed capacitance to ground 2

Input Capacitance
(Figure 3)

Switched capacitance 4.5

pF

CONVERSION RATE

Maximum Clock Frequency f

CLK

95

MHz

Minimum Clock Frequency 5

MHz

Data Latency Figure 6 8.0

Clock

cycles

DYNAMIC CHARACTERISTICS (Differential Inputs) (Note 2)

Small-Signal Noise Floor SSNF Input at less than -35dBFS

dBFS

fIN = 3MHz at -0.5dBFS (Notes 3, 4)

74

fIN = 47.5MHz at -0.5dBFS 73.6

fIN = 70MHz at -0.5dBFS (Notes 3, 4)

73.4

Signal-to-Noise Ratio SNR

f

IN

= 175MHz at -0.5dBFS (Notes 3, 4)

72

dB

fIN = 3MHz at -0.5dBFS (Notes 3, 4)

73.6

fIN = 47.5MHz at -0.5dBFS 73.2

fIN = 70MHz at -0.5dBFS (Notes 3, 4)

72.1

Signal-to-Noise and Distortion SINAD

f

IN

= 175MHz at -0.5dBFS (Notes 3, 4)

70.3

dB

±1.6

±0.65

±0.1 ±0.78

±0.35 ±5.3

C

SAMPLE

69.8

69.6

68.7

68.7

68.3

65.3

±1.024

V

DD

-74.6

/ 2

MAX12555

14-Bit, 95Msps, 3.3V ADC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

= 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = -40°C to +85°C, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 1)

PARAMETER

CONDITIONS

UNITS

fIN = 3MHz at -0.5dBFS (Notes 3, 4)

87.4

fIN = 47.5MHz at -0.5dBFS 86

fIN = 70MHz at -0.5dBFS (Notes 3, 4)

79

Spurious-Free Dynamic Range SFDR

f

IN

= 175MHz at -0.5dBFS (Notes 3, 4)

76.2

dBc

fIN = 3MHz at -0.5dBFS -84

fIN = 47.5MHz at -0.5dBFS

fIN = 70MHz at -0.5dBFS (Notes 3, 4)

Total Harmonic Distortion THD

f

IN

= 175MHz at -0.5dBFS (Notes 3, 4)

dBc

fIN = 3MHz at -0.5dBFS

fIN = 47.5MHz at -0.5dBFS -90

fIN = 70MHz at -0.5dBFS

Second Harmonic HD2

f

IN

= 175MHz at -0.5dBFS

dBc

fIN = 3MHz at -0.5dBFS -90

fIN = 47.5MHz at -0.5dBFS

fIN = 70MHz at -0.5dBFS

Third Harmonic HD3

f

IN

= 175MHz at -0.5dBFS

dBc

f

IN1

= 68.5MHz at -7dBFS

f

IN2

= 71.5MHz at -7dBFS

-79

Intermodulation Distortion IMD

f

IN1

= 172.5MHz at -7dBFS

f

IN2

= 177.5MHz at -7dBFS

-75

dBc

f

IN1

= 68.5MHz at -7dBFS

f

IN2

= 71.5MHz at -7dBFS

-80

Third-Order Intermodulation IM3

f

IN1

= 172.5MHz at -7dBFS

f

IN2

= 177.5MHz at -7dBFS

-76

dBc

f

IN1

= 68.5MHz at -7dBFS

f

IN2

= 71.5MHz at -7dBFS

80

Two-Tone Spurious-Free
Dynamic Range

f

IN1

= 172.5MHz at -7dBFS

f

IN2

= 177.5MHz at -7dBFS

76

dBc

Aperture Delay t

AD

Figure 4 1.2 ns

Aperture Jitter t

AJ

Figure 4 <0.2

ps

RMS

Output Noise n

OUT

INP = INN = COM 1.07

LSB

RMS

Overdrive Recovery Time ±10% beyond full scale 1

Clock

cycles

SYMBOL

SFDR

TT

MIN TYP MAX

74.5

73.3

67.8

-83.2

-77.8 -72.4

-75.5 -67.2

-88.1

-92.5

-84.2

-88.9

-79.2

-76.5

-73.7

MAX12555

14-Bit, 95Msps, 3.3V ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

= 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = -40°C to +85°C, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 1)

PARAMETER

CONDITIONS

UNITS

INTERNAL REFERENCE (REFIN = REFOUT; V

REFP

, V

REFN

, and V

COM

are generated internally)

REFOUT Output Voltage

V

COM Output Voltage V

COM

V

DD

/ 2

V

Differential-Reference Output
Voltage

V

REF

V

REF

= V

REFP

- V

REFN

= V

REFIN

x 3/4

V

REFOUT Load Regulation -1.0mA < I

REFOUT

< +0.1mA 35

mV/mA

REFOUT Temperature Coefficient

TC

REF

ppm/°C

Short to VDD—sinking

REFOUT Short-Circuit Current

Short to GND—sourcing 2.1

mA

B U F F ER ED EXT ER N A L R EF ER EN C E ( R EF IN d r i v e n e x t e r n a l ly ; V

R EF IN

= 2.0 4 8 V, V

R EF P

, V

R EF N

, a n d V

C OM

a r e g e n e r a t e d in t e r n a lly )

REFIN Input Voltage V

REFIN

V

REFP Output Voltage V

REFP

(V

DD

/ 2) + (V

REFIN

x 3/8)

V

REFN Output Voltage V

REFN

(V

DD

/ 2) - (V

REFIN

x 3/8)

V

COM Output Voltage V

COM

V

DD

/ 2

V

Differential-Reference Output
Voltage

V

REF

V

REF

= V

REFP

- V

REN

= V

REFIN

x 3/4

V

Differential-Reference
Temperature Coefficient

ppm/°C

REFIN Input Resistance

MΩ

U N B U F F ER ED EXT ER N A L R EF ER EN C E ( R EF IN = G N D ; V

R EF P

, V

R EF N

, a n d V

C OM

a r e a p p l ie d e x t e r n a l ly )

COM Input Voltage V

COM

VDD / 2

V

REFP Input Voltage V

REFP

- V

COM

V

REFN Input Voltage V

REFN

- V

COM

V

Differential-Reference Input
Voltage

V

REF

V

REF

= V

REFP

- V

REFN

= V

REFIN

x 3/4

V

REFP Sink Current I

REFP

V

REFP

= 2.418V 1.4 mA

REFN Source Current I

REFN

V

REFN

= 0.882V 1.0 mA

COM Sink Current I

COM

V

COM

= 1.650V 1.0 mA

REFP, REFN Capacitance 13 pF

COM Capacitance 6pF

CLOCK INPUTS (CLKP, CLKN)

Single-Ended Input High
Threshold

V

IH

CLKTYP = GND, CLKN = GND

0.8 x
V

Single-Ended Input Low
Threshold

V

IL

CLKTYP = GND, CLKN = GND

0.2 x
V

Minimum Differential Input
Voltage Swing

CLKTYP = high 0.2

V

P-P

SYMBOL

MIN TYP MAX

V

REFOUT

1.980 2.048 2.066

1.65

1.60 1.65 1.70

1.454 1.604

1.536

+50

0.24

2.048

2.418

0.882

±25

>50

1.65

0.768

-0.768

1.536

V

DD

V

DD

MAX12555

14-Bit, 95Msps, 3.3V ADC

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

= 95MHz (50% duty cycle, 1.4V

P-P

square wave), 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

Differential Input Common-Mode
Voltage

CLKTYP = high

V

Input Resistance R

CLK

Figure 5 5 kΩ

Input Capacitance C

CLK

2pF

DIGITAL INPUTS (CLKTYP, DCE, G/T, PD)

Input High Threshold V

IH

0.8 x
V

Input Low Threshold V

IL

0.2 x
V

VIH = OV

DD

±5

Input Leakage Current

V

IL

= 0 ±5

µA

Input Capacitance C

DIN

5pF

DIGITAL OUTPUTS (D13–D0, DAV, DOR)

D13–D0, DOR, I

SINK

= 200µA 0.2

Output-Voltage Low V

OL

DAV, I

SINK

= 600µA 0.2

V

D13–D0, DOR, I

SOURCE

= 200µA

0.2

Output-Voltage High V

OH

DAV, I

SOURCE

= 600µA

OV

DD

-

0.2

V

Tri-State Leakage Current I

LEAK

(Note 5) ±5 µA

D13–D0, DOR Tri-State Output
Capacitance

C

OUT

(Note 5) 3 pF

DAV Tri-State Output
Capacitance

C

DAV

(Note 5) 6 pF

POWER REQUIREMENTS

Analog Supply Voltage V

DD

3.3

V

Digital Output Supply Voltage OV

DD

1.7 1.8

V

Normal operating mode,

single-ended clock

Normal operating mode,
f

IN

= 175MHz at -0.5dBFS,

CLKTYP = OV

DD,

differential clock

165

Analog Supply Current I

VDD

Power-down mode clock idle, PD = OV

DD

0.1

mA

OV

DD

V

/ 2

DD

OVDD -

OV

DD

3.15

fIN = 175MHz at -0.5dBFS, CLKTYP = GND,

141

150.6

3.60

VDD +

0.3V

MAX12555

14-Bit, 95Msps, 3.3V ADC

6 _______________________________________________________________________________________

Note 1: Specifications ≥+25°C guaranteed by production test; <+25°C guaranteed by design and characterization.

Note 2: See definitions in the Parameter Definitions section at the end of this data sheet.
Note 3: Specifications guaranteed by design and characterization. Devices tested for performance during production test.
Note 4: Due to test-equipment-jitter limitations at 175MHz, 0.06% of the spectrum on each side of the fundamental is excluded from

the spectral analysis.

Note 5: During power-down, D13–D0, DOR, and DAV are high impedance.
Note 6: Digital outputs settle to V

IH

or VIL.

Note 7: Guaranteed by design and characterization.

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

= 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = -40°C to +85°C, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 1)

PARAMETER

CONDITIONS

UNITS

Normal operating mode,

single-ended clock

Normal operating mode,
f

IN

= 175MHz at -0.5dBFS,

CLKTYP = OV

DD

, differential clock

545

Analog Power Dissipation P

DISS

Power-down mode clock idle, PD = OV

DD

0.3

mW

Normal operating mode,
f

IN

= 175MHz at -0.5dBFS, OVDD = 1.8V,

C

L

≈ 5pF

mA

Digital Output Supply Current I

OVDD

Power-down mode clock idle, PD = OV

DD

8µA

TIMING CHARACTERISTICS (Figure 6)

Clock Pulse-Width High t

CH

5.2 ns

Clock Pulse-Width Low t

CL

5.2 ns

Data-Valid Delay t

DAV

CL = 5pF (Note 6) 5.2 ns

Data Setup Time Before Rising
Edge of DAV

t

SETUP

CL = 5pF (Notes 6, 7) 5.5 ns

Data Hold Time After Rising Edge
of DAV

t

HOLD

CL = 5pF (Notes 6, 7) 4.0 ns

Wake-Up Time from Power-Down

t

WAKE

V

REFIN

= 2.048V 10 ms

SYMBOL

MIN TYP MAX

fIN = 175MHz at -0.5dBFS, CLKTYP = GND,

465

497

10.2

MAX12555

14-Bit, 95Msps, 3.3V ADC

_______________________________________________________________________________________ 7

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc01

f

CLK

= 95MHz

f

IN

= 3.00354004MHz

A

IN

= -0.5dBFS
SNR = 73.82dB
SINAD = 73.31dB
THD = -82.8dBc
SFDR = 86.3dBc

010152052530354045

HD2

HD3 HD5 HD7 HD9

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc02

f

CLK

= 95MHz

f

IN

= 47.30285645MHz

A

IN

= -0.5dBFS
SNR = 73.13dB
SINAD = 72.74dB
THD = -83.4dBc
SFDR = 85.1dBc

010152052530354045

HD2

HD5

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc03

f

CLK

= 95MHz

f

IN

= 70.00915527MHz

A

IN

= -0.5dBFS
SNR = 73.12dB
SINAD = 71.50dB
THD = -76.6dBc
SFDR = 77.8dBc

010152052530354045

HD7

HD5 HD2

HD3

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc04

f

CLK

= 95MHz

f

IN

= 174.8895264MHz

A

IN

= -0.5dBFS
SNR = 71.29dB
SINAD = 68.98dB
THD = -72.8dBc
SFDR = 74.4dBc

010152052530354045

HD2

HD5

HD3

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc05

f

CLK

= 95MHz

f

IN

= 225.010376MHz

A

IN

= -0.5dBFS
SNR = 70.67dB
SINAD = 67.70dB
THD = -70.7dBc
SFDR = 72.5dBc

010152052530354045

HD3

HD5

HD9

HD7

HD2

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

TWO-TONE FFT PLOT

(16,384-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc06

f

CLK

= 95MHz

f

IN1

= 68.49579MHz
A

IN1

= -6.9dBFS

f

IN2

= 71.49933MHz
A

IN2

= -7.0dBFS

SFDR

TT

= 77.9dBc
IMD = -76.4dBc
IM3 = -77.5dBc

010152052530354045

f

IN1

f

IN2

f

IN1

+ f

IN2

2 x f

IN1

+ 3 x f

IN2

2 x f

IN2

+ f

IN1

2 x f

IN1

+ f

IN2

-110

-100

-20

-80

-90

-70

-60

-40

-10

-50

-30

0

TWO-TONE FFT PLOT

(16,384-POINT DATA RECORD)

FREQUENCY (MHz)

AMPLITUDE (dBFS)

MAX12555 toc07

f

CLK

= 95MHz

f

IN1

= 172.4949MHz

A

IN1

= -7.0dBFS

f

IN2

= 177.493MHz

A

IN2

= -7.0dBFS

SFDR

TT

= 74.6dBc
IMD = -73.6dBc
IM3 = -74.7dBc

010152052530354045

f

IN1

f

IN2

f

IN1

+ f

IN2

2 x f

IN1

+ f

IN2

2 x f

IN2

+ f

IN1

-3

-1

-2

1

0

2

3

0 81924096 12288 16384

INTEGRAL NONLINEARITY

MAX12555 toc08

DIGITAL OUTPUT CODE

INL (LSB)

-1.0

-0.4

-0.8

0.4

0

0.8

-0.6

0.2

-0.2

0.6

1.0

0 81924096 12288 16384

DIFFERENTIAL NONLINEARITY

MAX12555 toc09

DIGITAL OUTPUT CODE

DNL (LSB)

Typical Operating Characteristics

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

≈ 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = +25°C, unless otherwise noted.)

MAX12555

14-Bit, 95Msps, 3.3V ADC

8 _______________________________________________________________________________________

60

62

64

66

68

70

72

74

76

25 45 65 85 105 125

SNR, SINAD

vs. SAMPLING RATE

MAX12555 toc10

f

CLK

(MHz)

SNR, SINAD (dB)

fIN = 70MHz

SNR
SINAD

60

65

70

75

80

85

90

95

100

25 45 65 85 105 125

SFDR, -THD

vs. SAMPLING RATE

MAX12555 toc11

f

CLK

(MHz)

SFDR, -THD (dBc)

fIN = 70MHz

SFDR

-THD

200

250

300

350

400

450

500

550

600

25 45 65 85 105 125

POWER DISSIPATION

vs. SAMPLING RATE

MAX12555 toc12

f

CLK

(MHz)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
f

IN

= 70MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

60

62

64

66

68

70

72

74

76

25 45 65 85 105 125

SNR, SINAD

vs. SAMPLING RATE

MAX12555 toc13

f

CLK

(MHz)

SNR, SINAD (dB)

fIN = 175MHz

SNR
SINAD

60

65

70

75

80

85

90

95

100

25 45 65 85 105 125

SFDR, -THD

vs. SAMPLING RATE

MAX12555 toc14

f

CLK

(MHz)

SFDR, -THD (dBc)

fIN = 175MHz

SFDR

-THD

200

250

300

350

400

450

500

550

600

25 45 65 85 105 125

POWER DISSIPATION

vs. SAMPLING RATE

MAX12555 toc15

f

CLK

(MHz)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
f

IN

= 175MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

60

62

64

66

68

70

72

74

76

0 100 200 30050 150 250 350 400

SNR, SINAD

vs. ANALOG INPUT FREQUENCY

MAX12555 toc16

ANALOG INPUT FREQUENCY (MHz)

SNR, SINAD (dB)

SNR
SINAD

60

65

70

75

80

85

90

95

100

0 50 150 250100 200 300 350 400

SFDR, -THD

vs. ANALOG INPUT FREQUENCY

MAX12555 toc17

ANALOG INPUT FREQUENCY (MHz)

SFDR, -THD (dBc)

SFDR

-THD

200

250

300

350

400

450

500

550

600

0 50 150 250100 200 300 350 400

POWER DISSIPATION

vs. ANALOG INPUT FREQUENCY

MAX12555 toc18

ANALOG INPUT FREQUENCY (MHz)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

Typical Operating Characteristics (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

≈ 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = +25°C, unless otherwise noted.)

MAX12555

14-Bit, 95Msps, 3.3V ADC

_______________________________________________________________________________________ 9

25

30

35

40

45

50

60

70

55

65

75

-40 -30 -20 -10-35 -25 -15 -5 0

SNR, SINAD

vs. ANALOG INPUT AMPLITUDE

MAX12555 toc19

ANALOG INPUT AMPLITUDE (dBFS)

SNR, SINAD (dB)

SNR
SINAD

fIN = 175MHz

50

55

60

65

70

75

80

85

90

-40 -35 -25 -15-30 -20 -10 -5 0

SFDR, -THD

vs. ANALOG INPUT AMPLITUDE

MAX12555 toc20

ANALOG INPUT AMPLITUDE (dBFS)

SFDR, -THD (dBc)

SFDR

-THD

fIN = 175MHz

200

250

300

350

400

450

500

550

600

-40 -35 -25 -15-30 -20 -10 -5 0

POWER DISSIPATION

vs. ANALOG INPUT AMPLITUDE

MAX12555 toc21

ANALOG INPUT AMPLITUDE (dBFS)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
f

IN

= 175MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

64

66

65

67

69

68

70

71

73

72

74

2.8 3.0 3.2 3.4 3.6

SNR, SINAD

vs. ANALOG SUPPLY VOLTAGE

MAX12555 toc22

AVDD (V)

SNR, SINAD (dB)

SNR
SINAD

fIN = 175MHz

60

65

70

75

80

85

95

90

100

2.8 3.0 3.2 3.4 3.6

SFDR, -THD

vs. ANALOG SUPPLY VOLTAGE

MAX12555 toc23

AVDD (V)

SFDR, -THD (dBc)

SFDR

-THD

fIN = 175MHz

300

350

400

450

500

550

650

600

700

2.8 3.0 3.2 3.4 3.6

POWER DISSIPATION

vs. ANALOG SUPPLY VOLTAGE

MAX12555 toc24

AVDD (V)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
f

IN

= 175MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

60

62

64

66

68

70

74

72

76

1.4 2.2 3.01.8 2.6 3.4 3.8

SNR, SINAD

vs. DIGITAL SUPPLY VOLTAGE

MAX12555 toc25

OVDD (V)

SNR, SINAD (dB)

SNR
SINAD

fIN = 175MHz

60

65

70

75

80

85

95

90

100

1.4 2.2 3.01.8 2.6 3.4 3.8

SFDR, -THD

vs. DIGITAL SUPPLY VOLTAGE

MAX12555 toc26

OVDD (V)

SFDR, -THD (dBc)

SFDR

-THD

fIN = 175MHz

200

250

300

350

400

450

550

500

600

1.4 2.2 3.01.8 2.6 3.4 3.8

POWER DISSIPATION

vs. DIGITAL SUPPLY VOLTAGE

MAX12555 toc27

OVDD (V)

POWER DISSIPATION (mW)

DIFFERENTIAL CLOCK
f

IN

= 175MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER
ANALOG POWER

Typical Operating Characteristics (continued)

(V

DD

= 3.3V, OV

DD

= 1.8V, GND = 0, REFIN = REFOUT (internal reference), V

IN

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

≈ 95MHz (50% duty cycle, 1.4V

P-P

square wave), TA = +25°C, unless otherwise noted.)