MAX11135_V1 Datasheet, PDF (17/40 Pages) Maxim Integrated Products – 500ksps, Low-Power, Serial 12-/10-/8-Bit,4-/8-/16-Channel ADCs

MAX11135–MAX11143
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
Functional Diagram
VDD OVDD
REF+ REF-
AIN0
AIN1
AIN15
I/P
MUX
OSCILLATOR
REF+ REF-
ADC DOUT
CS SCLK
MAX11135–MAX11143
CONTROL LOGIC
AND
SEQUENCER
CS
SCLK
DIN
DOUT
CNVST
EOC
Detailed Description
The MAX11135–MAX11143 are 12-/10-/8-bit with external
reference and industry-leading 1.5MHz, full linear band-
width, high-speed, low-power, serial output successive-
approximation register (SAR) analog-to-digital converters
(ADC). These devices feature scan mode, internal aver-
aging to increase SNR, and AutoShutdown.
The external clock mode features the SampleSet technol-
ogy, a user-programmable analog input channel sequenc-
er. The user may define and load a unique sequencing
pattern into the ADC allowing both high- and low-frequen-
cy inputs to be converted without interface activity. This
feature frees the controlling unit for other tasks while lower-
ing overall system noise and power consumption.
The MAX11135–MAX11143 includes internal clock. The
internal clock mode features an integrated FIFO, allowing
data to be sampled at high speed and then held for read-
out at any time or at a lower clock rate. Internal averaging
is also supported in this mode improving SNR for noisy
input signals. All input channels are configurable for sin-
gle-ended, fully differential or pseudo-differential inputs
in unipolar or bipolar mode. The MAX11135–MAX11143
operate from a 2.35V to 3.6V supply and consume only
4.2mW at 500ksps.
The MAX11135–MAX11143 include AutoShutdown, fast
wake-up, and a high-speed 3-wire serial interface. The
devices feature full power-down mode for optimal power
management.
Data is converted from analog voltage sources in a
variety of channel and data-acquisition configurations.
Microprocessor (FP) control is made easy through a 3-wire
SPI-/QSPI-/MICROWIRE-compatible serial interface.
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