ADC12DS080

SNAS443A – MARCH 2008 – REVISED MARCH 2013

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Dynamic Converter Electrical Characteristics

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

Parameter

Test Conditions

Typical(3)

Limits

(Limits)(4)

DYNAMIC CONVERTER CHARACTERISTICS, AIN= -1dBFS

FPBW

Full Power Bandwidth

-1 dBFS Input,

−3 dB Corner

1.0

GHz

fIN = 10 MHz

71

dBFS

SNR

Signal-to-Noise Ratio

fIN = 70 MHz

70.5

dBFS

fIN = 170 MHz

70

68.5

dBFS

fIN = 10 MHz

88

dBFS

SFDR

Spurious Free Dynamic Range

fIN = 70 MHz

85

dBFS

fIN = 170 MHz

81

76.5

dBFS

fIN = 10 MHz

11.5

Bits

ENOB

Effective Number of Bits

fIN = 70 MHz

11.4

Bits

fIN = 170 MHz

11.3

10.9

Bits

fIN = 10 MHz

−86

dBFS

THD

Total Harmonic Disortion

fIN = 70 MHz

−85

dBFS

fIN = 170 MHz

−80

-75

dBFS

fIN = 10 MHz

−90

dBFS

H2

Second Harmonic Distortion

fIN = 70 MHz

−88

dBFS

fIN = 170 MHz

−83

-76.5

dBFS

fIN = 10 MHz

−88

dBFS

H3

Third Harmonic Distortion

fIN = 70 MHz

−85

dBFS

fIN = 170 MHz

−81

-76.5

dBFS

fIN = 10 MHz

70.8

dBFS

SINAD

Signal-to-Noise and Distortion Ratio

fIN = 70 MHz

70.3

dBFS

fIN = 170 MHz

69.6

67.6

dBFS

fIN=19.5 and 20.5MHz,

IMD

Intermodulation Distortion

-84

dBFS

each -7dBFS

(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. 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. See Figure 2.

(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)

This parameter is specified in units of dBFS - indicating the value that would be attained with a full-scale input signal.

8

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