EM357-RTR datasheet(187/240 Pages) ETC2

187 / 240 page

EM351 / EM357

10-12

120-035X-000D

Preliminary

Parameter

Min.

Typ.

Max.

Units

VREF load capacitance

External VREF voltage range

1.1

1.2

1.3

External VREF input impedance

MΩ

Minimum input voltage

Input buffer disabled

Input buffer enabled

0.1

Maximum input voltage

Input buffer disabled

Input buffer enabled

VREF

VDD_PADS - 0.1

Single-ended signal range

Input buffer disabled

Input buffer enabled

0.1

VREF

VDD_PADS – 0.1

Differential signal range

Input buffer disabled

Input buffer enabled

-VREF

-VDD_PADS + 0.1

+VREF

+VDD_PADS - 0.1

Common mode range

Input buffer disabled

Input buffer enabled

VDD_PADS/2

VREF

Input referred ADC offset

-10

Input Impedance

1 MHz sample clock

6 MHz sample clock

Not sampling

0.5

MΩ

Note:

The signal-ended ADC measurements are limited in their range and only guaranteed for accuracy within

the limits shown in this table. The ADC's internal design allows for measurements outside of this range (±200

mV) when the input buffer is disabled, but the accuracy of such measurements is not guaranteed. The

maximum input voltage is of more interest to the differential sampling where a differential measurement

might be small, but a common mode can push the actual input voltage on one of the signals towards the upper

voltage limit.

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