AFE5801 datasheet(11/46 Pages) TI

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G − Gain − dB

−6

−4

−2

G023

Low-Power Mode Enabled

Low-Power Mode Disabled

G − Gain − dB

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

G024

Low-Power Mode Disabled

Low-Power Mode Enabled

G − Gain − dB

−90

−85

−80

−75

−70

−65

−60

−10

Ain = −1dBFS

G003

fIN = 1MHz

fIN = 5MHz

fIN = 10MHz

G − Gain − dB

−90

−88

−86

−84

−82

−80

−78

−76

−74

−72

−70

−10

Ain = −6dBFS

G004

fIN = 5MHz

fIN = 1MHz

fIN = 10MHz

AFE5801

www.ti.com

SLOS591D – SEPTEMBER 2008 – REVISED MAY 2010

TYPICAL CHARACTERISTICS (continued)

All graphs are at 25°C, AVDD3 = 3.3V, AVDD18 = DVDD18 = 1.8V, –1dBFS analog input AC coupled with 0.1mF, internal

reference mode, maximum rated channel sampling frequency (65MSPS), LVCMOS (single-ended) clock, 50% duty cycle,

fIN = 2MHz, anti-aliasing filter set at 14MHz (3dB corner), output clamp disable and analog high-pass filter enabled. spacer

Figure 8. Input-Referred Noise for Low Gains

Figure 9. Input-Referred Noise for High Gains

Figure 10. HD2 Across Coarse Gain and Three fIN

Figure 11. HD2 Across Coarse Gain and Three fIN

(–1dBFS)(1)

(–6dBFS)(2)

(1)

For gains

≥5dB, the input amplitude is adjusted to give –1dBFS. At 5dB gain, input amplitude is 4dBm (corresponding to –1dBFS).

For gains less than 5dB, the input is kept constant at 4dBm.

(2)

For gains

≥0dB, the input amplitude is adjusted to give –6dBFS. At 0dB gain, input amplitude is 4dBm (corresponding to –6dBFS).

For gains less than 0dB, the input is kept constant at 4dBm.

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