AD7468BRT-R datasheet(13/28 Pages) AD

13 / 28 page

AD7466/AD7467/AD7468

Rev. C | Page 13 of 28

TYPICAL PERFORMANCE CHARACTERISTICS

DYNAMIC PERFORMANCE CURVES

Figure 6, Figure 7, and Figure 8 show typical FFT plots for the

AD7466, AD7467, and AD7468, respectively, at a 100 kSPS

sample rate and a 30 kHz input tone.

Figure 9 shows the signal-to-noise and distortion ratio

performance vs. input frequency for various supply voltages

while sampling at 100 kSPS with an SCLK frequency of 3.4 MHz

for the AD7466.

Figure 10 shows the signal-to-noise ratio (SNR) performance

vs. input frequency for various supply voltages while sampling

at 100 kSPS with an SCLK frequency of 3.4 MHz for the

AD7466.

Figure 11 shows the total harmonic distortion (THD) vs. analog

input signal frequency for various supply voltages while sam-

pling at 100 kSPS with an SCLK frequency of 3.4 MHz for

the AD7466.

Figure 12 shows the THD vs. analog input frequency for

different source impedances with a supply voltage of 2.7 V, an

SCLK frequency of 3.4 MHz, and sampling at a rate of 100 kSPS

for the AD7466 (see the Analog Input section).

DC ACCURACY CURVES

Figure 13 and Figure 14 show typical INL and DNL perform-

ance for the AD7466.

POWER REQUIREMENT CURVES

Figure 15 shows the supply current vs. supply voltage for the

AD7466 at −40°C, +25°C, and +85°C, with SCLK frequency of

3.4 MHz and a sampling rate of 100 kSPS.

Figure 16 shows the maximum current vs. supply voltage for the

AD7466 with different SCLK frequencies.

Figure 17 shows the shutdown current vs. supply voltage.

Figure 18 shows the power consumption vs. throughput rate for

the AD7466 with an SCLK of 3.4 MHz and different supply

voltages. See the Power Consumption section for more details.

–15

–35

–55

–75

–95

–115

FREQUENCY (kHz)

8192 POINT FFT

VDD = 1.8V

fSAMPLE = 100kSPS

fIN = 30kHz

SINAD = 70.82dB

THD = –84.18dB

SFDR = –85.48dB

Figure 6. AD7466 Dynamic Performance at 100 kSPS

–5

–25

–45

–65

–85

–105

FREQUENCY (kHz)

8192 POINT FFT

VDD = 1.8V

fSAMPLE = 100kSPS

fIN = 30kHz

SINAD = 61.51dB

THD = –80.61dB

SFDR = –82.10dB

Figure 7. AD7467 Dynamic Performance at 100 kSPS

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