AD8319ACPZ-R2 datasheet(16/19 Pages) AD

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AD8319

Data Sheet

Rev. D | Page 16 of 19

OPERATION BEYOND 8 GHz

The AD8319 is specified for operation up to 8 GHz, but it provides

useful measurement accuracy over a reduced dynamic range of

up to 10 GHz. Figure 35 shows the performance of the AD8319

over temperature at 10 GHz when the device is configured as

shown in Figure 22. Dynamic range is reduced at this frequency,

but the AD8319 does provide 30 dB of measurement range within

±3 dB of linearity error.

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

–40

–35

–30

–25

–20

–15

–10

–5

PIN (dBm)

–5

–4

–3

–2

–1

Figure 35. VOUT and Log Conformance Error vs. Input Amplitude at 10 GHz,

Multiple Devices, RTADJ = Open, CLPF = 1000 pF

Implementing an impedance match for frequencies beyond

8 GHz can improve the sensitivity of the AD8319 and

measurement range.

Operation beyond 10 GHz is possible, but part-to-part

variation, most notably in the intercept, becomes significant.

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