AM3359_14 datasheet(98/236 Pages) TI1

98 / 236 page

AM3359, AM3358, AM3357

AM3356, AM3354, AM3352

SPRS717F – OCTOBER 2011 – REVISED APRIL 2013

www.ti.com

Table 3-17. TSC_ADC Electrical Parameters (continued)

PARAMETER

CONDITION

MIN

NOM

MAX

UNIT

Internal Voltage Reference:

VDDA_ADC = 1.8V

Spurious Free Dynamic

External Voltage Reference:

Range

VREFP - VREFN = 1.8V

Input Signal: 30 kHz sine wave at

-0.5 dB Full Scale

Internal Voltage Reference:

VDDA_ADC = 1.8V

Signal-to-Noise Plus

External Voltage Reference:

Distortion

VREFP - VREFN = 1.8V

Input Signal: 30 kHz sine wave at

-0.5 dB Full Scale

VREFP and VREFN Input Impedance

Input Impedance of

f = input frequency

[1/((65.97 x 10-12) x f)]

AIN[7:0](2)

Sampling Dynamics

ADC

Conversion Time

Clock

Cycles

ADC

Acquisition Time

Clock

Cycles

Sampling Rate

ADC Clock = 3 MHz

200

kSPS

Channel-to-Channel Isolation

100

Touchscreen Switch Drivers

Pull-Up and Pull-Down Switch ON Resistance (Ron)

Pull-Up and Pull-Down

Switch Current Leakage

Source impedance = 500

0.5

Ileak

Drive Current

Touchscreen Resistance

Pen Touch Detect

(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.

Device Operating Conditions

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Product Folder Links: AM3359 AM3358 AM3357 AM3356 AM3354 AM3352

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