Analog Input Bandwidth

The MAX11600–MAX11605 feature input tracking cir-

cuitry with a 2MHz small signal bandwidth. The 2MHz

input bandwidth makes it possible to digitize high-

speed transient events and measure periodic signals

with bandwidths exceeding the ADC’s sampling rate by

using undersampling techniques. To avoid high-fre-

quency signals being aliased into the frequency band

of interest, anti-alias filtering is recommended.

Analog Input Range and Protection

Internal protection diodes clamp the analog input to

ing damage to the device. For accurate conversions,

the inputs must not go more than 50mV below GND or

than 50mV, the input current should be limited to 2mA.

2.7V to 3.6V and 4.5V to 5.5V, Low-Power,

4-/8-/12-Channel 2-Wire Serial 8-Bit ADCs

10

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ANALOG

INPUT

MUX

AIN1

AIN11/REF

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

AIN8

AIN9

AIN10

AIN0

SCL

SDA

INPUT SHIFT REGISTER

SETUP REGISTER

CONFIGURATION REGISTER

CONTROL

LOGIC

REFERENCE

4.096V (MAX11604)

2.048V (MAX11605)

INTERNAL

OSCILLATOR

OUTPUT SHIFT

REGISTER AND

12-BYTE RAM

THE MAX11600/MAX11601/MAX11604/MAX11605

USE THE SAME PIN FOR AIN_ AND REF, WHILE THE

MAX11602/MAX11603 USE DIFFERENT PINS.

SEE THE PIN DESCRIPTION SECTION.

REF

T/H

8-BIT

ADC

GND

MAX11604

MAX11605

Figure 3. MAX11604/MAX11605 Simplified Functional Diagram

AIN0

AIN1

AIN2

AIN3/REF

GND

ANALOG INPUT MUX

CAPACITIVE

DAC

REF

MAX11600

MAX11601

Figure 4. Equivalent Input Circuit