AGND

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I/O

ADC12C170

SNAS374D – DECEMBER 2006 – REVISED APRIL 2009

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Converter Electrical Characteristics

25°C

(1) (2) (3)

Typical

Units

Symbol

Parameter

Conditions

Limits

(4)

(Limits)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits (min)

2.95

LSB (max)

INL

Full Scale Input

±0.85

-3.29

LSB (min)

1.3

LSB (max)

DNL

Differential Non Linearity

Full Scale Input

±0.54

-0.92

LSB (min)

3.38

%FS (max)

PGE

Positive Gain Error

+0.85

-2.10

%FS (min)

3.00

%FS (max)

NGE

Negative Gain Error

-0.31

-3.57

%FS (min)

TC GE

Gain Error Tempco

+8.0

ppm/°C

0.89

%FS (max)

−0.13

-1.14

%FS (min)

Offset Error Tempco

+0.5

ppm/°C

Under Range Output Code

0

0

Over Range Output Code

4095

4095

REFERENCE AND ANALOG INPUT CHARACTERISTICS

Common Mode Input Voltage

1.5

V

Reference Ladder Midpoint Output

Output load = 1 mA

1.5

V

Voltage

(CLK LOW)

6

pF

(6)

V

(CLK HIGH)

9

pF

1.00

V

Reference Input Resistance

9

k

Ω

(1)

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)

(3)

(4)

specifications are not ensured.

(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.

(6)

The input capacitance is the sum of the package/pin capacitance and the sample and hold circuit capacitance.

(7)

Optimum performance will be obtained by keeping the reference input in the 0.9V to 1.1V range. The LM4051CIM3-ADJ (SOT-23

package) is recommended for external reference applications.

6

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