Rainbow Electronics MAX1209 User Manual

General Description

The MAX1209 is a 3.3V, 12-bit, 80Msps 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 single-ended or differential signals. The MAX1209 is optimized for low power, small size, and high dynamic performance. Excellent dynamic performance is maintained from baseband to input frequencies of 175MHz and beyond, making the MAX1209 ideal for intermediatefrequency (IF) sampling applications.

Powered from a single 3.0V to 3.6V supply, the MAX1209 consumes only 366mW while delivering a typical signal-to-noise (SNR) performance of 66.5dB at an input frequency of 175MHz. In addition to low operating power, the MAX1209 features a 3µW power-down mode to conserve power during idle periods.

A flexible reference structure allows the MAX1209 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 ±1.15V. The MAX1209 provides a common-mode reference to simplify design and reduce external component count in differential analog input circuits.

The MAX1209 supports both a single-ended and differential input clock drive. Wide variations in the clock duty cycle are compensated with the ADC’s internal duty-cycle equalizer (DCE).

ADC conversion results are available through a 12-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 MAX1209 to interface with various logic levels.

The MAX1209 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 Communication Receivers

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

Ultrasound and Medical Imaging

Portable Instrumentation

Low-Power Data Acquisition

Features

♦ Direct IF Sampling Up to 400MHz

♦ Excellent Dynamic Performance

68.0dB/66.5dB SNR at fIN= 70MHz/175MHz

85.1dBc/85.5dBc SFDR at f

IN

= 70MHz/175MHz

♦ 3.3V Low-Power Operation

366mW (Single-Ended Clock Mode) 393mW (Differential Clock Mode) 3µW (Power-Down Mode)

♦ Differential or Single-Ended Clock

♦ Fully Differential or Single-Ended Analog Input

♦ Adjustable Full-Scale Analog Input Range: ±0.35V

to ±1.15V

♦ Common-Mode Reference

♦ CMOS-Compatible Outputs in Two’s Complement

or Gray Code

♦ Data-Valid Indicator Simplifies Digital Design

♦ Data Out-of-Range Indicator

♦ Miniature, 40-Pin Thin QFN Package with Exposed

Paddle

♦ Evaluation Kit Available (Order MAX1211EVKIT)

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-1001; Rev 0; 8/04

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

Pin-Compatible Versions

Pin Configuration appears at end of data sheet.

PART

MAX1209ETL

PART

MAX12553 65 14 IF/Baseband

MAX1209 80 12 IF

MAX1211 65 12 IF

MAX1208 80 12 Baseband

MAX1207 65 12 Baseband

MAX1206 40 12 Baseband

TEMP

RANGE

-40°C to +85°C

SAMPLING

RATE (Msps)

PIN-PACKAGE

40 Thin QFN (6mm x 6mm x 0.8mm)

RESOLUTION

(BITS)

PKG

CODE

T4066-3

TARGET

APPLICATION

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +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

D11 Through D0, I.C. 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

DC ACCURACY (Note 2)

Resolution 12 Bits

Integral Nonlinearity INL fIN = 3MHz ±0.6 LSB

Differential Nonlinearity DNL

Offset Error V

Gain Error V

ANALOG INPUT (INP, INN)

Differential Input Voltage Range V

Common-Mode Input Voltage V

Input Capacitance (Figure 3)

CONVERSION RATE

Maximum Clock Frequency f

Minimum Clock Frequency 5 MHz

Data Latency Figure 6 8.5

DYNAMIC CHARACTERISTICS (differential inputs, Note 2)

Small-Signal Noise Floor SSNF Input at less than -35dBFS -68.8 dBFS

Signal-to-Noise and Distortion SINAD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

f

= 3MHz, no missing codes over

IN

temperature

= 2.048V ±0.17 ±0.91 %FS

REFIN

= 2.048V ±0.56 ±5.3 %FS

REFIN

DIFF

C

PAR

C

SAMPLE

CLK

Differential or single-ended inputs ±1.024 V

Fixed capacitance to ground 2

Switched capacitance 1.9

fIN = 70MHz at -0.5dBFS 68.0

fIN = 100MHz at -0.5dBFS 67.7Signal-to-Noise Ratio SNR

= 175MHz at -0.5dBFS (Note 6) 64.5 66.5

f

IN

fIN = 70MHz at -0.5dBFS 67.8

fIN = 100MHz at -0.5dBFS 67.6

= 175MHz at -0.5dBFS (Note 6) 64.3 66.4

f

IN

-0.77 ±0.35 LSB

/ 2 V

DD

80 MHz

pF

Clock

cycles

dB

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Spurious-Free Dynamic Range SFDR

Third Harmonic HD3

Intermodulation Distortion IMD

Third-Order Intermodulation IM3

Two-Tone Spurious-Free Dynamic Range

Full-Power Bandwidth FPBW Input at -0.5dBFS, -3dB roll-off 700 MHz

Aperture Delay t

Aperture Jitter t

Output Noise n

Overdrive Recovery Time ±10% beyond full scale 1

fIN = 70MHz at -0.5dBFS 85.1

fIN = 100MHz at -0.5dBFS 86.2

= 175MHz at -0.5dBFS (Note 6) 74.6 85.5

f

IN

dBc

fIN = 70MHz at -0.5dBFS -81.2

fIN = 100MHz at -0.5dBFS -82.3Total Harmonic Distortion THD

f

= 175MHz at -0.5dBFS -82.7 -73.9

IN

dBc

fIN = 70MHz at -0.5dBFS -86.5

fIN = 100MHz at -0.5dBFS -89.6Second Harmonic HD2

= 175MHz at -0.5dBFS -89

f

IN

dBc

fIN = 70MHz at -0.5dBFS -85.1

dBc

SFDR

AD

AJ

OUT

fIN = 100MHz at -0.5dBFS -86.5

= 175MHz at -0.5dBFS -88.6

f

IN

f

= 68.5MHz at -7dBFS,

TT

IN1

= 71.5MHz at -7dBFS

f

IN2

f

= 172.5MHz at -7dBFS,

IN1

= 177.5MHz at -7dBFS

f

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

f

= 71.5MHz at -7dBFS

IN2

f

= 172.5MHz at -7dBFS,

IN1

f

= 177.5MHz at -7dBFS

IN2

-82.4

-74.2

-86.4

-86.1

85.1

74.2

Figure 4 0.9 ns

Figure 4 <0.2 ps

INP = INN = COM 0.52 LSB

Clock

cycles

RMS

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

INTERNAL REFERENCE (REFIN = REFOUT; V

REFOUT Output Voltage V

COM Output Voltage V

Differential Reference Output Voltage

REFOUT Load Regulation 35 mV/mA

REFOUT Temperature Coefficient TC

REFOUT Short-Circuit Current

BUF F ERED EXTERNAL REF ERENCE (REF IN d ri ven extern al ly; V

REFIN Input Voltage V

REFP Output Voltage V

REFN Output Voltage V

COM Output Voltage V

Differential Reference Output Voltage

Differential Reference Temperature Coefficient

REFIN Input Resistance >50 MΩ

UNBUFFERED EXTERNAL REFERENCE (REFIN = GND; V

COM Input Voltage V

REFP Input Voltage V

REFN Input Voltage V

Differential Reference Input Voltage

REFP Sink Current I

REFN Source Current I

COM Sink Current I

REFP, REFN Capacitance 13 pF

COM Capacitance 6pF

CLOCK INPUTS (CLKP, CLKN)

Single-Ended Input High Threshold

Single-Ended Input Low Threshold

Differential Input Voltage Swing CLKTYP = high 1.4 V

Differential Input Common-Mode Voltage

, V

REFOUT

COM

V

REF

REFIN

REFP

REFN

COM

V

REF

REFP

V

DD

V

REF

, and V

REFN

/ 2 1.65 V

= V

REFP

- V

Short to VDD—sinking 0.24

Short to GND—sourcing 2.1

R EF IN

(V

/ 2) + (V

DD

(V

DD

V

/ 2 1.60 1.65 1.70 V

DD

V

= V

REF

/ 2) - (V

REFP

REFIN

- V

are generated internally)

COM

1.984 2.048 2.070 V

REFN

1.024 V

+50 ppm/°C

= 2.048V, V

R EF P

, V

R EF N

, an d V

are g en erated in tern ally)

C OM

2.048 V

/ 4) 2.162 V

/ 4) 1.138 V

REFN

0.971 1.024 1.069 V

mA

±25 ppm/°C

, V

COM

V

REF

REFP

REFN

COM

V

IH

V

REFN

, and V

REFP

V

/ 2 1.65 V

DD

- V

REFP

COM

- V

REFN

V

REF

V

REFP

V

REFN

COM

= V

REFP

- V

REFN

= 2.162V 1.1 mA

= 1.138V 1.1 mA

CLKTYP = GND, CLKN = GND

IL

CLKTYP = high V

are applied externally)

COM

0.8 x V

DD

0.512 V

-0.512 V

1.024 V

0.3 mA

0.2 x V

DD

/ 2 V

DD

V

P-P

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Resistance R

Input Capacitance C DIGITAL INPUTS (CLKTYP, G/T, PD)

Input High Threshold V

Input Low Threshold V

Input Leakage Current

Input Capacitance C

DIGITAL OUTPUTS (D11–D0, DAV, DOR)

Output Voltage Low V

Output Voltage High V

Tri-State Leakage Current I

D11–D0, DOR Tri-State Output Capacitance

DAV Tri-State Output Capacitance

POWER REQUIREMENTS

Analog Supply Voltage V

Digital Output Supply Voltage OV

Analog Supply Current I

CLK

DIN

OH

LEAK

C

OUT

C

DAV

DD

Figure 5 5 kΩ

IH

IL

OL

VIH = OV

V

D11–D0, DOR, I

DAV, I

D11–D0, DOR, I

DAV, I

DD

= 0 ±5

IL

SINK

= 600µA 0.2

SINK

SOURCE

= 600µA

SOURCE

(Note 3) ±5 µA

(Note 3) 3 pF

(Note 3) 6 pF

DD

Normal operating mode, f

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

IN

single-ended clock

VDD

Normal operating mode,

= 175MHz at -0.5dBFS,

f

IN

CLKTYP = OV

differential clock

DD,

Power-down mode clock idle, PD = OV

2pF

0.8 x

OV

DD

0.2 x

OV

±5

5pF

= 200µA 0.2

OV

-

= 200µA

0.2

OV

DD

-

0.2

3.0 3.3 3.6 V

V

1.7 2.0

DD

0.3V

111

119 132

DD

0.001

DD

+

V

µA

V

mA

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling 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. Note 3: During power-down, D11–D0, DOR, and DAV are high impedance. Note 4: Guaranteed by design and characterization. Note 5: Digital outputs settle to V

IH

or VIL.

Note 6: Due to test equipment jitter limitations at 175MHz, 0.15% of the spectrum on each side of the fundamental is excluded from

the spectral analysis.

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

Analog Power Dissipation P

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Digital Output Supply Current I

TIMING CHARACTERISTICS (Figure 6)

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

Normal operating mode, f

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

IN

single-ended clock

DISS

OVDD

CH

CL

DAV

t

SETUP

t

HOLD

WAKE

Normal operating mode,

= 175MHz at -0.5dBFS,

f

IN

CLKTYP = OV

Power-down mode clock idle, PD = OV

Normal operating mode, f

= 175MHz at -0.5dBFS, OVDD = 2.0V,

IN

≈ 5pF

C

L

Power-down mode clock idle, PD = OV

CL = 5pF (Note 5) 6.4 ns

CL = 5pF (Notes 4, 5) 7.7 ns

CL = 5pF (Notes 4, 5) 4.2 ns

V

= 2.048V 10 ms

REFIN

, differential clock

DD

366

mW

393 436

0.003

9.2 mA

0.9 µA

6.25 ns

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

_______________________________________________________________________________________ 7

Typical Operating Characteristics

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

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

SINGLE-TONE FFT PLOT

(8192-POINT DATA RECORD)

0

-10

-20

-30

-40

-50

-60

-70

AMPLITUDE (dBFS)

-80

-90

-100

-110 0 4 8 12162024 28323640

f

= 80.00352MHz SINAD = 67.872dB

CLK

f

= 69.99331395MHz THD = -82.119dBc

IN

A

= -0.506dBFS SFDR = 85.522dBc

IN

SNR = 68.039dB

HD2

FREQUENCY (MHz)

TWO-TONE FFT PLOT

(16,384-POINT DATA RECORD)

0

-10

-20

-30

-40

-50

f

- f

IN2

-60

-70

AMPLITUDE (dBFS)

-80

-90

-100

-110

IN1

0 4 8 12162024 28323640

f

= 80MHz A

CLK

f

= 172.4853516MHz SFDRTT = 74.205dBc

IN1

A

= -6.976dBFS IMD = -74.108dBc

IN1

f

= 177.4853516MHz IM3 = -85.923dBc

IN2

f

IN1

f

IN2

FREQUENCY (MHz)

IN2

HD3

f

IN2

+ f

IN1

= -7.017dBFS

HD4

MAX1209 toc01

MAX1209 toc04

SINGLE-TONE FFT PLOT

(4096-POINT DATA RECORD)

0

-10

-20

-30

-40

-50

-60

-70

AMPLITUDE (dBFS)

-80

-90

-100

-110 0 4 8 12162024 28323640

f

= 80.00352MHz SINAD = 66.010dB

CLK

f

= 175.078125MHz THD = -82.976dBc

IN

A

= -0.500dBFS SFDR = 84.718dBc

IN

SNR = 66.097dB

INTEGRAL NONLINEARITY

1.0

0.8

0.6

0.4

0.2

0

INL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0 0 1024 1536512 2048 2650 3072 3584 4096

HD4 HD2 HD3

FREQUENCY (MHz)

DIGITAL OUTPUT CODE

TWO-TONE FFT PLOT

(16,384-POINT DATA RECORD)

0

MAX1209 toc02

-10

-20

-30

-40

-50

-60

-70

AMPLITUDE (dBFS)

-80

-90

-100

-110 0 4 8 12162024 28323640

f

CLK

f

= 68.50098MHz SFDRTT = 85.065dBc

IN1

A

IN1

f

= 71.499MHz IM3 = -86.378dBc

IN2

f

IN1

f

IN2

f

+ 2 x f

IN1

IN2

2 x f

= -7.046dBFS

IN2

IN1

f

+ f

IN2

IN1

FREQUENCY (MHz)

= 80MHz A

= -7.049dBFS IMD = -82.255dBc

+ f

IN2

DIFFERENTIAL NONLINEARITY

1.0

0.8

MAX1209 toc05

0.6

0.4

0.2

0

DNL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0 0 1024 1536512 2048 2650 3072 3584 4096

DIGITAL OUTPUT CODE

MAX1209 toc03

MAX1209 toc06

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

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

SNR, SINAD (dB)

70

fIN ≈ 70MHz

69

68

67

66

65

64

63

62

0 100

SNR, SINAD vs. SAMPLING RATE

70

fIN ≈ 175MHz

69

68

67

66

65

SNR, SINAD (dB)

64

63

62

04020 60 80 100

SNR, SINAD

vs. SAMPLING RATE

f

(MHz)

CLK

806020 40

SNR SINAD

MAX1209 toc07

100

fIN ≈ 70MHz

95

90

85

80

75

SFDR, -THD (dBc)

70

65

60

0 100

SFDR, -THD

vs. SAMPLING RATE

f

(MHz)

CLK

SFDR, -THD vs. SAMPLING RATE

100

fIN ≈ 175MHz

95

MAX1209 toc10

90

85

80

75

SFDR, -THD (dBc)

70

SNR SINAD

f

(MHz)

CLK

65

60

04020 60 80 100

f

(MHz)

CLK

450

MAX1209 toc08

400

350

300

POWEER DISSIPATION (mW)

250

200

500

MAX1209 toc11

450

400

350

POWER DISSIPATION (mW)

300

250

806020 40

SFDR

-THD

SFDR

-THD

POWER DISSIPATION

vs. SAMPLING RATE

DIFFERENTIAL CLOCK

≈ 70MHz

f

IN

≈ 5pF

C

L

ANALOG + DIGITAL POWER ANALOG POWER

CLK

806020 40

(MHz)

0 120100

f

POWER DISSIPATION vs. SAMPLING RATE

DIFFERENTIAL CLOCK

≈ 175MHz

f

IN

≈ 5pF

C

L

ANALOG + DIGITAL POWER ANALOG POWER

04020 60 80 100

f

(MHz)

CLK

MAX1209 toc09

MAX1209 toc12

vs. ANALOG INPUT FREQUENCY

SNR, SINAD

70

f

≈ 80MHz

CLK

69

68

67

66

65

SNR, SINAD (dB)

64

63

62

0 50 100 150 200

ANALOG INPUT FREQUENCY (MHz)

SNR SINAD

MAX1209 toc13

vs. ANALOG INPUT FREQUENCY

95

f

CLK

90

85

80

SFDR, -THD (dBc)

75

70

0 50 100 150 200

SFDR, -THD

≈ 80MHz

ANALOG INPUT FREQUENCY (MHz)

SFDR

-THD

500

MAX1209 toc14

450

400

350

POWER DISSIPATION (mW)

300

POWER DISSIPATION

vs. ANALOG INPUT FREQUENCY

DIFFERENTIAL CLOCK

≈ 80MHz

f

CLK

≈ 5pF

C

L

0 50 100 150 200

ANALOG INPUT FREQUENCY (MHz)

ANALOG + DIGITAL POWER ANALOG POWER

MAX1209 toc15

MAX1209

12-Bit, 80Msps, 3.3V IF-Sampling ADC

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(V

DD

= 3.3V, OV

DD

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V

IN

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

G/T = low, f

CLK

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

SFDR, -THD

vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE

MAX1209 toc23

OVDD (V)

SFDR, -THD (dBc)

3.43.02.62.21.8

65

70

75

80

85

90

95

100

60

1.4 3.8

f

CLK

= 80.03584MHz

f

IN

= 32.11399MHz

SFDR

-THD

POWER DISSIPATION

vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE

MAX1209 toc24

OVDD (V)

SFDR, -THD (dBc)

3.43.02.62.21.8

250

225

300

350

400

450

500

550

200

1.4 3.8

DIFFERENTIAL CLOCK f

CLK

= 80.03584MHz

f

IN

= 32.11399MHz

C

L

≈ 5pF

ANALOG + DIGITAL POWER ANALOG POWER

SNR, SINAD

vs. ANALOG INPUT AMPLITUDE

70

f

= 79.95392MHz

CLK

65

= 175.00168MHz

f

IN

60

55

50

45

SNR, SINAD (dB)

40

35

30

25

-40 -30-35 -25 -15 -5-20 -10 0 ANALOG INPUT AMPLITUDE (dBFS)

SNR, SINAD

vs. ANALOG POWER-INPUT VOLTAGE

70

f

= 80.03584MHz

CLK

69

= 32.11399MHz

f

IN

68

67

66

65

64

SNR, SINAD (dB)

63

62

61

60

2.6 3.6 VDD (V)

vs. ANALOG INPUT AMPLITUDE

SFDR, -THD

470

450

MAX1209 toc17

430

410

390

POWER DISSIPATION (mW)

370

350

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

SNR SINAD

MAX1209 toc16

90

f

= 79.95392MHz

CLK

85

= 175.00168MHz

f

IN

80

75

70

65

60

SFDR, -THD (dBc)

55

50

45

40

-40 -30-35 -25 -15 -5-20 -10 0 ANALOG INPUT AMPLITUDE (dBFS)

SFDR

-THD

SFDR, -THD

vs. ANALOG POWER-INPUT VOLTAGE

100

f

= 80.03584MHz

CLK

= 32.11399MHz

f

95

MAX1209 toc19

SNR SINAD

3.43.23.02.8

IN

90

85

80

75

SFDR, -THD (dBc)

70

65

60

2.6 3.6 VDD (V)

3.43.23.02.8

SFDR

-THD

MAX1209 toc20

vs. ANALOG POWER-INPUT VOLTAGE

550

DIFFERENTIAL CLOCK f

CLK

500

f

IN

C

L

450

400

350

300

POWER DISSIPATION (mW)

250

200

2.6 3.6

POWER DISSIPATION

vs. ANALOG INPUT AMPLITUDE

DIFFERENTIAL CLOCK

= 79.95392MHz

f

CLK

= 175.0016MHz

f

IN

≈ 5pF

C

L

ANALOG + DIGITAL POWER ANALOG POWER

ANALOG INPUT AMPLITUDE (dBFS)

POWER DISSIPATION

= 80.03584MHz

= 32.11399MHz

≈

5pF

ANALOG + DIGITAL POWER ANALOG POWER

VDD (V)

MAX1209 toc18

MAX1209 toc21

3.43.23.02.8

vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE

SNR, SINAD

70

f

= 80.03584MHz

CLK

69

= 32.11399MHz

f

IN

68

67

66

65

64

SNR, SINAD (dB)

63

62

61

60

1.4 3.8

SNR SINAD

OVDD (V)

MAX1209 toc22

3.43.02.62.21.8