MAX1209 datasheet(4/28 Pages) MAXIM

Part #	MAX1209

Description	14-Bit, 95Msps, 3.3V ADC

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Manufacturer	MAXIM [Maxim Integrated Products]

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14-Bit, 95Msps, 3.3V ADC

4

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.3V, OVDD = 1.8V, GND = 0, REFIN = REFOUT (internal reference), VIN = -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, fCLK = 95MHz (50% duty cycle, 1.4VP-P square wave), 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; VREFP, VREFN, and VCOM are generated internally)

REFOUT Output Voltage

VREFOUT

1.980

2.048

2.066

V

COM Output Voltage

VCOM

VDD / 2

1.65

V

Differential-Reference Output

Voltage

VREF

VREF = VREFP - VREFN = VREFIN x 3/4

1.536

V

REFOUT Load Regulation

-1.0mA < IREFOUT < +0.1mA

35

mV/mA

REFOUT Temperature Coefficient

TCREF

+50

ppm/°C

Short to VDD—sinking

0.24

REFOUT Short-Circuit Current

Short to GND—sourcing

2.1

mA

BUFFERED EXTERNAL REFERENCE (REFIN driven externally; VREFIN = 2.048V, VREFP, VREFN, and VCOM are generated internally)

REFIN Input Voltage

VREFIN

2.048

V

REFP Output Voltage

VREFP

(VDD / 2) + (VREFIN x 3/8)

2.418

V

REFN Output Voltage

VREFN

(VDD / 2) - (VREFIN x 3/8)

0.882

V

COM Output Voltage

VCOM

VDD / 2

1.60

1.65

1.70

V

Differential-Reference Output

Voltage

VREF

VREF = VREFP - VREN = VREFIN x 3/4

1.454

1.604

V

Differential-Reference

Temperature Coefficient

±25

ppm/°C

REFIN Input Resistance

>50

M

Ω

UNBUFFERED EXTERNAL REFERENCE (REFIN = GND; VREFP, VREFN, and VCOM are applied externally)

COM Input Voltage

VCOM

VDD / 2

1.65

V

REFP Input Voltage

VREFP - VCOM

0.768

V

REFN Input Voltage

VREFN - VCOM

-0.768

V

Differential-Reference Input

Voltage

VREF

VREF = VREFP - VREFN = VREFIN x 3/4

1.536

V

REFP Sink Current

IREFP

VREFP = 2.418V

1.4

mA

REFN Source Current

IREFN

VREFN = 0.882V

1.0

mA

COM Sink Current

ICOM

VCOM = 1.650V

1.0

mA

REFP, REFN Capacitance

13

pF

COM Capacitance

6pF

CLOCK INPUTS (CLKP, CLKN)

Single-Ended Input High

Threshold

VIH

CLKTYP = GND, CLKN = GND

0.8 x

VDD

V

Single-Ended Input Low

Threshold

VIL

CLKTYP = GND, CLKN = GND

0.2 x

VDD

V

Minimum Differential Input

Voltage Swing

CLKTYP = high

0.2

VP-P

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