ADC12L066 datasheet(8/29 Pages) TI1

Part #	ADC12L066

Description	12-Bit, 20 MSPS, 185 mW A/D Converter with Internal Sample-and-Hold

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Manufacturer	TI1 [Texas Instruments]

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ADC12020

SNAS186B – APRIL 2003 – REVISED MARCH 2013

www.ti.com

AC ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA = VD = +5V, VDR =

+3.0V, PD = 0V, VREF = +2.0V, fCLK = 20 MHz, tr = tf = 3 ns, CL = 25 pF/pin. Boldface limits apply for TJ = TMIN to TMAX: all

other limits TA = TJ = 25°C

(1) (2) (3) (4)

Units

Symbol

Parameter

Conditions

Typical (5)

Limits (5)

(Limits)

fCLK1

Maximum Clock Frequency

20

30

MHz (min)

fCLK2

Minimum Clock Frequency

100

kHz

tCH

Clock High Time

20

ns (min)

tCL

Clock Low Time

20

ns (min)

tCONV

Conversion Latency

6

Clock Cycles

VDR = 2.5V

11

16.8

ns (max)

tOD

Data Output Delay after Rising CLK Edge

VDR = 3.0V

11

16.8

ns (max)

tAD

Aperture Delay

1.2

ns

tAJ

Aperture Jitter

2

ps rms

tDIS

Data outputs into TRI-STATE™ Mode

4

ns

tEN

Data Outputs Active after TRI-STATE™

4

ns

tPD

Power Down Mode Exit Cycle

0.1µF capacitors on pins 30, 31, 32

500

ns

(1)

7The inputs are protected as shown below. Input voltage magnitudes above VA or below GND will not damage this device, provided

current is limited per ABSOLUTE MAXIMUM RATINGS (3). However, errors in the A/D conversion can occur if the input goes above VA

or below GND by more than 100 mV. As an example, if VA is 4.75V, the full-scale input voltage must be ≤4.85V to ensure accurate

conversions.

(2)

To ensure accuracy, it is required that |VA–VD| ≤ 100 mV and separate bypass capacitors are used at each power supply pin.

(3)

With the test condition for VREF = +2.0V (4VP-P differential input), the 12-bit LSB is 977 µV.

(4)

Timing specifications are tested at TTL logic levels, VIL = 0.4V for a falling edge and VIH = 2.4V for a rising edge.

(5)

Typical figures are at TA = TJ = 25°C, and represent most likely parametric norms. Test limits are specific to TI's AOQL (Average

Outgoing Quality Level).

8

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