AM3351 datasheet(97/252 Pages) TI1

97 / 252 page

AM3359, AM3358, AM3357, AM3356, AM3354, AM3352, AM3351

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SPRS717J – OCTOBER 2011 – REVISED APRIL 2016

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Product Folder Links: AM3359 AM3358 AM3357 AM3356 AM3354 AM3352 AM3351

Specifications

Table 5-16. TSC_ADC Electrical Parameters (continued)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

Spurious free dynamic

range

Internal voltage reference:

VDDA_ADC = 1.8 V

External voltage reference:

VREFP – VREFN = 1.8 V

Input signal: 30-kHz sine wave at

–0.5-dB full scale

Signal-to-noise plus

distortion

Internal voltage reference:

VDDA_ADC = 1.8 V

External voltage reference:

VREFP – VREFN = 1.8 V

Input signal: 30-kHz sine wave at

–0.5-dB full scale

VREFP and VREFN input impedance

kΩ

Input impedance of

AIN[7:0](2)

ƒ = Input frequency

[1 / ((65.97 × 10–12) × ƒ)]

Sampling Dynamics

Conversion time

ADC

clock

cycles

Acquisition time

ADC

clock

cycles

Sampling rate

ADC clock = 3 MHz

200

kSPS

Channel-to-channel isolation

100

Touch Screen Switch Drivers

Pullup and pulldown switch ON resistance (Ron)

Pullup and pulldown switch

current leakage Ileak

Source impedance = 500 Ω

0.5

Drive current

Touch screen resistance

kΩ

Pen touch detect

kΩ

(1) VREFP and VREFN must be tied to ground if the internal voltage reference is used.

(2) This parameter is valid when the respective AIN terminal is configured to operate as a general-purpose ADC input.

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