ADC12DC080_14 datasheet(8/27 Pages) TI1

Numer części	ADC12DC080

Szczegółowy opis	Dual 12-Bit, 80 MSPS A/D Converter with CMOS Outputs

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Producent	TI1 [Texas Instruments]

Strona internetowa	http://www.ti.com

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8 / 27 page

VA

AGND

To Internal Circuitry

I/O

ADC12DC080

SNAS405B – SEPTEMBER 2007 – REVISED NOVEMBER 2008

www.ti.com

Logic and Power Supply Electrical Characteristics

Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, VA = +3.0V, VDR = +2.5V, Internal VREF

= +1.2V, fCLK = 80 MHz, VCM = VCMO, CL = 5 pF/pin. Typical values are for TA = 25°C. Boldface limits apply for TMIN ≤ TA ≤

TMAX. All other limits apply for TA = 25°C

(1) (2)

Units

Symbol

Parameter

Conditions

Typical (3)

Limits

(Limits)

DIGITAL INPUT CHARACTERISTICS (CLK, PD_A,PD_B)

VIN(1)

Logical “1” Input Voltage

VD = 3.3V

2.0

V (min)

VIN(0)

Logical “0” Input Voltage

VD = 3.0V

0.8

V (max)

IIN(1)

Logical “1” Input Current

VIN = 3.3V

10

µA

IIN(0)

Logical “0” Input Current

VIN = 0V

−10

µA

CIN

Digital Input Capacitance

5

pF

DIGITAL OUTPUT CHARACTERISTICS (DA0-DA11,DB0-DB11,DRDY)

VOUT(1)

Logical “1” Output Voltage

IOUT = −0.5 mA , VDR = 2.4V

2.0

V (min)

VOUT(0)

Logical “0” Output Voltage

IOUT = 1.6 mA, VDR = 2.4V

0.4

V (max)

+ISC

Output Short Circuit Source Current

VOUT = 0V

−10

mA

−ISC

Output Short Circuit Sink Current

VOUT = VDR

10

mA

COUT

Digital Output Capacitance

5

pF

POWER SUPPLY CHARACTERISTICS

IA

Analog Supply Current

Full Operation

200

233

mA (max)

IDR

Digital Output Supply Current

Full Operation (4)

26

mA

Power Consumption

Excludes IDR

(4)

600

700

mW (max)

Power Down Power Consumption

PD_A=PD_B=VA

30

mW

(1)

The inputs are protected as shown below. Input voltage magnitudes above VA or below GND will not damage this device, provided

current is limited per Note 4 under Absolute Maximum Ratings. However, errors in the A/D conversion can occur if the input goes above

2.6V or below GND as described in the Operating Ratings section.

(2)

With a full scale differential input of 2VP-P , the 12-bit LSB is 488 µV.

(3)

Typical figures are at TA = 25°C and represent most likely parametric norms at the time of product characterization. The typical

specifications are not ensured.

(4)

IDR is the current consumed by the switching of the output drivers and is primarily determined by load capacitance on the output pins,

the supply voltage, VDR, and the rate at which the outputs are switching (which is signal dependent). IDR=VDR(C0 x f0 + C1 x f1 +....C11 x

f11) where VDR is the output driver power supply voltage, Cn is total capacitance on the output pin, and fn is the average frequency at

which that pin is toggling.

8

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