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ADC12D1800RF

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SNAS518I –JULY 2011–REVISED JANUARY 2014

3.5 Converter Electrical Characteristics

Dynamic Converter Characteristics

(1)

ADC12D1800RF

Units

Symbol Parameter Conditions

(Limits)

Typ Lim

Bandwidth Non-DES Mode, DESCLKIQ Mode

-3 dB

(2)

2.7 GHz

-6 dB 3.1 GHz

-9 dB 3.5 GHz

-12 dB 4.0 GHz

DESI Mode, DESQ Mode

-3 dB

(2)

1.2 GHz

-6 dB 2.3 GHz

-9 dB 2.7 GHz

-12 dB 3.0 GHz

DESIQ Mode

-3 dB

(2)

1.75 GHz

-6 dB 2.7 GHz

Gain Flatness Non-DES Mode

D.C. to Fs/2 ±0.4 dB

D.C. to Fs ±1.1 dB

D.C. to 3Fs/2 ±1.7 dB

D.C. to 2Fs ±5.7 dB

DESI, DESQ Mode

D.C. to Fs/2 ±2.7 dB

D.C. to Fs ±9.2 dB

DESIQ Mode

D.C. to Fs/2 ±1.6 dB

DESCLKIQ Mode

D.C. to Fs/2 ±1.2 dB

CER Code Error Rate Error/Sam

-18

ple

IMD

3rd order Intermodulation DES Mode

Distortion

= 2670 MHz ± 2.5MHz -75 dBFS

@ -13 dBFS

-62 dBc

= 2070 MHz ± 2.5MHz -85 dBFS

@ -13 dBFS

-72 dBc

= 2670 MHz ± 2.5MHz -80 dBFS

@ -16 dBFS

-64 dBc

= 2070 MHz ± 2.5MHz -83 dBFS

@ -16 dBFS

-67 dBc

Noise Floor Density 50Ω single-ended termination, DES -155.0 dBm/Hz

Mode

-154.0 dBFS/Hz

(1) This parameter is specified by design and/or characterization and is not tested in production.

(2) The -3 dB point is the traditional Full-Power Bandwidth (FPBW) specification. Although the insertion loss is approximately half the power

at this frequency, the dynamic performance of the ADC does not necessarily begin to degrade to a level below which it may be

effectively used in an application. The ADC may be used at input frequencies above the -3 dB FPBW point, for example, into the 3rd

Nyquist zone. Depending on system requirements, it is only necessary to compensate for the insertion loss.

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