ADS5400IPZP datasheet(42/48 Pages) TI

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SINAD + 10log10

N ) PD

THD + 10log10

ADS5400

SLAS611B – OCT 2009 – REVISED MARCH 2010

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Signal-to-Noise and Distortion (SINAD)

SINAD is the ratio of the power of the fundamental (PS) to the power of all the other spectral components

including noise (PN) and distortion (PD), but excluding dc.

(5)

SINAD is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the

reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s

full-scale range.

Temperature Drift

Temperature drift (with respect to gain error and offset error) specifies the change from the value at the nominal

temperature to the value at TMIN or TMAX. It is computed as the maximum variation the parameters over the whole

temperature range divided by TMIN – TMAX.

Total Harmonic Distortion (THD)

THD is the ratio of the power of the fundamental (PS) to the power of the first five harmonics (PD).

(6)

THD is typically given in units of dBc (dB to carrier).

Two-Tone Intermodulation Distortion (IMD3)

IMD3 is the ratio of the power of the fundamental (at frequencies f1, f2) to the power of the worst spectral

component at either frequency 2f1 – f2 or 2f2 – f1). IMD3 is given in units of either dBc (dB to carrier) when the

absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the

fundamental is extrapolated to the converter’s full-scale range.

SPACER

REVISION HISTORY

Changes from Original (October 2009) to Revision A

Page

•

Changed the FEATURES list ................................................................................................................................................ 1

•

Changed Abs Max, Recommended Op Conditions, and Electrical Specs values. ............................................................... 2

•

Changed the description of the ANALOG INPUT entry in the Rec Op Condition table From: Differential input range

To: Full-scale differential input range .................................................................................................................................... 3

•

Changed the Rec Op table, VCM - TYP value From: 2.5V To AVDD5/2 ............................................................................... 3

•

Changed the description of the ANALOG INPUT entry in the Elect Char table From: Differential input range To:

Full-scale differential input range .......................................................................................................................................... 3

•

Changed the Elect Char table, VCM - TYP value From: 2.5V To AVDD5/2 .......................................................................... 3

•

Changed the Timing Diagrams illustrations .......................................................................................................................... 9

•

Changed Figure 1 ................................................................................................................................................................. 9

•

Changed Figure 2 ............................................................................................................................................................... 10

•

Changed Figure 3 ............................................................................................................................................................... 11

•

Changed Figure 4 ............................................................................................................................................................... 12

•

Changed Figure 5 ............................................................................................................................................................... 13

•

Deleted text "Internal pull-down resistor" from the SCLK, SDIO, and SDO pins in the Pin Functions table ...................... 15

•

Changed the SDENB pin text From: "Internal pull-up resistor" To: "Internal 100k

Ω pull-up resisto" in the Pin

Functions table .................................................................................................................................................................... 15

•

Added Note to the Pin Functions table - This pin contains an internal ~40k

Ω pull-down resistor, to ground. ................... 15

•

Changed Table 8 BIT <7:3>, Title and description ............................................................................................................. 20

•

Changed Table 9 BIT <0>, Default setting description, and BIT <7:2> description ........................................................... 20

•

Changed Table 10 BIT <0>, Default setting description ..................................................................................................... 21

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