ADC08D1500EVAL datasheet(9/33 Pages) NSC

Part #	ADC08D1500EVAL

Description	High Performance, Low Power, Dual 8-Bit, 1.5 GSPS A/D Converter

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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Converter Electrical Characteristics (Continued)

NOTE: This product is currently in development and the parameters specified in this section are DESIGN TARGETS.

The specifications in this section cannot be guaranteed until device characterization has taken place. The following

specifications apply after calibration for V

A =VDR = +1.9VDC, OutV = 1.9V, VIN FSR (a.c. coupled) = differential 870mVP-P,CL

= 10 pF, Differential, a.c. coupled Sinewave Input Clock, f

CLK = 1.5 GHz at 0.5VP-P with 50% duty cycle, VBG = Floating, Non-

Extended Control Mode, SDR Mode, R

EXT = 3300

Ω ±0.1%, Analog Signal Source Impedance = 100Ω Differential. Boldface

limits apply for T

A =TMIN to TMAX. All other limits TA = 25˚C, unless otherwise noted. (Notes 6, 7)

Symbol

Parameter

Conditions

Typical

(Note 8)

Limits

(Note 8)

Units

(Limits)

ANALOG INPUT AND REFERENCE CHARACTERISTICS

V

IN

Full Scale Analog Differential

Input Range

FSR pin 14 Low

650

570

mV

P-P (min)

730

mV

P-P (max)

FSR pin 14 High

870

790

mV

P-P (min)

950

mV

P-P (max)

V

CMI

Analog Input Common Mode

Voltage

V

CMO

V

CMO −50

V

CMO +50

mV (min)

mV (max)

C

IN

Analog Input Capacitance,

Normal operation (Notes 10,

11)

Differential

0.02

pF

Each input pin to ground

1.6

pF

Analog Input Capacitance, DES

Mode (Notes 10, 11)

Differential

0.08

pF

Each input pin to ground

2.2

pF

R

IN

Differential Input Resistance

100

94

Ω (min)

106

Ω (max)

ANALOG OUTPUT CHARACTERISTICS

V

CMO

Common Mode Output Voltage

1.26

0.95

1.45

V (min)

V (max)

V

CMO_LVL

V

CMO input threshold to set DC

Coupling mode

V

A = 1.8V

0.60

V

A = 2.0V

0.66

V

TC V

CMO

Common Mode Output Voltage

Temperature Coefficient

T

A = −40˚C to +85˚C

118

ppm/˚C

C

LOAD

V

CMO

Maximum V

CMO load

Capacitance

80

pF

V

BG

Bandgap Reference Output

Voltage

I

BG = ±100 µA

1.26

1.20

1.33

V (min)

V (max)

TC V

BG

Bandgap Reference Voltage

Temperature Coefficient

T

A = −40˚C to +85˚C,

I

BG = ±100 µA

28

ppm/˚C

C

LOAD

V

BG

Maximum Bandgap Reference

load Capacitance

80

pF

TEMPERATURE DIODE CHARACTERISTICS

∆V

BE

Temperature Diode Voltage

192 µA vs. 12 µA,

T

J = 25˚C

71.23

mV

192 µA vs. 12 µA,

T

J = 85˚C

85.54

mV

CHANNEL-TO-CHANNEL CHARACTERISTICS

Offset Match

1

LSB

Positive Full-Scale Match

Zero offset selected in Control

Register

1

LSB

Negative Full-Scale Match

Zero offset selected in Control

Register

1

LSB

Phase Matching (I,Q)

F

IN = 1.0 GHz

< 1

Degree

X-TALK

Crosstalk from I (Agressor) to Q

(Victim) Channel

Aggressor = 867 MHz F.S.

Victim = 100 MHz F.S.

-71

dB

X-TALK

Crosstalk from Q (Agressor) to I

(Victim) Channel

Aggressor = 867 MHz F.S.

Victim = 100 MHz F.S.

-71

dB

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