ADC12D040

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SNAS171E – JUNE 2002 – REVISED MARCH 2013

Converter Electrical Characteristics

Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA VD +5V, VDR +3.0V, PD

= 0V, INT/EXT = VD, VREF = +2.0V,OEA, OEB = 0V, fCLK = 40 MHz, tr = tf = 3 ns, CL = 20 pF/pin. Boldface limits apply for TJ

= TMIN to TMAX: all other limits TJ = 25°C

(1) (2)

Typical

Limits

Units

Symbol

Parameter

Conditions

(3)

(3)

(Limits)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits (min)

INL

Integral Non Linearity(4)

±0.7

±2.0

LSB (max)

DNL

Differential Non Linearity

±0.4

±1.0

LSB (max)

Positive Error

0.51

+2.8/

−1.9

%FS

GE

Gain Error

Negative Error

0.68

+4/

−2.7

%FS

External Reference

15

ppm/ºC

TC GE

Gain Error Tempco

Internal Reference

100

ppm/ºC

VOFF

Offset Error (VIN+ = VIN−)

−0.1

±1.2

%FS (max)

External Reference

3

ppm/ºC

TC VOFF

Offset Error Tempco

Internal Reference

3

ppm/ºC

Under Range Output Code

0

0

Over Range Output Code

4095

4095

DYNAMIC CONVERTER CHARACTERISTICS

FPBW

Full Power Bandwidth

0 dBFS Input, Output at

−3 dB

100

MHz

fIN = 1 MHz, VIN = −0.5 dBFS

69

dB

SNR

Signal-to-Noise Ratio

fIN = 10 MHz, VIN = −0.5 dBFS

68

66.5

dB (min)

fIN = 1 MHz, VIN = −0.5 dBFS

69

dB

SINAD

Signal-to-Noise and Distortion

fIN = 10 MHz, VIN = −0.5 dBFS

68

65.6

dB (min)

fIN = 1 MHz, VIN = −0.5 dBFS

11.1

Bits

ENOB

Effective Number of Bits

fIN = 10 MHz, VIN = −0.5 dBFS

10.9

10.6

Bits (min)

fIN = 1 MHz, VIN = −0.5 dBFS

−80

dB

THD

Total Harmonic Distortion

fIN = 10 MHz, VIN = −0.5 dBFS

−78

−69

dB (max)

fIN = 1 MHz, VIN = −0.5 dBFS

−84

dB

H2

Second Harmonic

fIN = 10 MHz, VIN = −0.5 dBFS

−80

−73

dB (max)

fIN = 1 MHz, VIN = −0.5 dBFS

−84

dB

H3

Third Harmonic

fIN = 10 MHz, VIN = −0.5 dBFS

−82

−69.5

dB (max)

fIN = 1 MHz, VIN = −0.5 dBFS

84

dB

SFDR

Spurious Free Dynamic Range

fIN = 10 MHz, VIN = −0.5 dBFS

80

69.5

dB (min)

fIN = 9.6 MHz and 10.2 MHz, each = −6.0

IMD

Intermodulation Distortion

−80

dBFS

dBFS

INTER-CHANNEL CHARACTERISTICS

Channel—Channel Offset Match

±0.02

%FS

Channel—Channel Gain Error Match

±0.05

%FS

10 MHz Tested Channel. 15 MHz Other

Crosstalk

−80

dB

Channel

(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, see Note 4 in the Absolute Maximum Ratings table. 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 (see Figure 2).

(2)

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

(3)

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

Outgoing Quality Level).

(4)

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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