Datasheet

0 5 10 15 20 25 30 35 40

100

(dB)

INPUT FREQUENCY (MHz)

SFDR (dBc)

SNR (dBFs)

LMH6552

SNOSAX9H –APRIL 2007–REVISED MARCH 2013

www.ti.com

Figure 53. LMH6552/ADC14DS105 SFDR and SNR Performance vs. Frequency

The amplifier and ADC should be located as close as possible. Both devices require that the filter components

be in close proximity to them. The amplifier needs to have minimal parasitic loading on the output traces and the

ADC is sensitive to high frequency noise that may couple in on its input lines. Some high performance ADCs

have an input stage that has a bandwidth of several times its sample rate. The sampling process results in all

input signals presented to the input stage mixing down into the first Nyquist zone (DC to Fs/2).

The LMH6552 is capable of driving a variety of Texas Instruments Analog-to-Digital Converters. This is shown in

TABLE 3. DIFFERENTIAL INPUT ADC's COMPATIBLE WITH LMH6552 DRIVER, which offers a list of possible

signal path ADC and amplifier combinations. The use of the LMH6552 to drive an ADC is determined by the

application and the desired sampling process (Nyquist operation, sub-sampling or over-sampling). See

application note AN-236 for more details on the sampling processes and application note AN-1393 'Using High

Speed Differential Amplifiers to Drive ADCs. For more information regarding a particular ADC, refer to the

particular ADC datasheet for details.

TABLE 3. DIFFERENTIAL INPUT ADC's COMPATIBLE WITH LMH6552 DRIVER

Product Number Max Sampling Rate (MSPS) Resolution Channels

ADC1173 15 8 SINGLE

ADC1175 20 8 SINGLE

ADC08351 42 8 SINGLE

ADC1175-50 50 8 SINGLE

ADC08060 60 8 SINGLE

ADC08L060 60 8 SINGLE

ADC08100 100 8 SINGLE

ADC08200 200 8 SINGLE

ADC08500 500 8 SINGLE

ADC081000 1000 8 SINGLE

ADC08D1000 1000 8 DUAL

ADC10321 20 10 SINGLE

ADC10D020 20 10 DUAL

ADC10030 27 10 SINGLE

ADC10040 40 10 DUAL

ADC10065 65 10 SINGLE

ADC10DL065 65 10 DUAL

ADC10080 80 10 SINGLE

ADC11DL066 66 11 DUAL

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