ADC12DC105_14 datasheet(5/24 Pages) TI1

Part #	ADC12DC105

Description	Dual 12-Bit, 105 MSPS A/D Converter with CMOS Outputs

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Manufacturer	TI1 [Texas Instruments]

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VA

AGND

To Internal Circuitry

I/O

ADC12DC105

www.ti.com

SNAS469A – SEPTEMBER 2008 – REVISED OCTOBER 2008

Operating Ratings

(1) (2)

Operating Temperature

−40°C ≤ TA ≤ +85°C

Supply Voltage (VA)

+2.7V to +3.6V

Output Driver Supply (VDR)

+2.4V to VA

(DCS Enabled)

30/70 %

Clock Duty Cycle

(DCS Disabled)

45/55 %

VCM

1.4V to 1.6V

|AGND-DRGND|

≤100mV

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is guaranteed to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test

conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance

characteristics may degrade when the device is not operated under the listed test conditions. Operation of the device beyond the

maximum Operating Ratings is not recommended.

(2)

All voltages are measured with respect to GND = AGND = DRGND = 0V, unless otherwise specified.

Converter Electrical Characteristics

Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, VA = +3.3V, VDR = +2.5V, Internal VREF

= +1.2V, fCLK = 105 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) (3)

Units

Parameter

Test Conditions

Typical(4)

Limits

(Limits)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits (min)

1.1

LSB (max)

INL

Integral Non Linearity(5)

±0.5

-1.1

LSB (min)

0.55

LSB (max)

DNL

Differential Non Linearity

±0.2

-0.55

LSB (min)

PGE

Positive Gain Error

-0.1

±1

%FS (max)

NGE

Negative Gain Error

0.18

±1

%FS (max)

TC PGE

Positive Gain Error Tempco

−40°C ≤ TA ≤ +85°C

-3

ppm/°C

TC NGE

Negative Gain Error Tempco

−40°C ≤ TA ≤ +85°C

-7

ppm/°C

VOFF

Offset Error

0.01

±0.55

%FS (max)

TC VOFF

Offset Error Tempco

−40°C ≤ TA ≤ +85°C

-4

ppm/°C

Under Range Output Code

0

Over Range Output Code

4095

(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. 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)

When the input voltage at any pin exceeds the power supplies (that is, VIN < AGND, or VIN > VA), the current at that pin should be

limited to ±5 mA. The ±50 mA maximum package input current rating limits the number of pins that can safely exceed the power

supplies with an input current of ±5 mA to 10.

(4)

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

specifications are not guaranteed.

(5)

Integral Non Linearity is defined as the deviation of the analog value, expressed in LSBs, from the straight line that passes through

positive and negative full-scale.

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