Datasheet

Detailed Description
The MAX1098/MAX1099 are low-power, serial-output,
multichannel ADCs with temperature-sensing capability
for thermostatic, process-control, and monitoring applica-
tions. An algorithmic switched-capacitor converter with
T/H circuitry for both positive and negative inputs sup-
ports fully differential 10-bit conversions from an internal
temperature sensor, two external temperature sensors,
or voltage sources in a variety of channel configurations.
Microprocessor (μP) control is made easy through a flex-
ible 3-wire serial interface.
Figure 1 shows a simplified functional diagram of the
MAX1098/MAX1099 internal architecture. In temperature-
sensing mode, the multiplexer (mux) steers bias currents
through internal or external diodes while the ADC com-
putes their temperature in relation to changes in forward
voltage. Channels not used for temperature measurement
can be configured to measure other system voltages.
Figure 1. MAX1098/MAX1099 Functional Diagram
INPUT
REGISTER
DIODE
BIAS
CONTROL
CONTROL
LOGIC
INPUT
MUX
OUTPUT
REGISTER
CLOCK
ADC
SHIELD
OUTPUT
T/H
T/H
IN
+
IN
-
V
DD
GND
DOUT
CS
SCLK
DIN
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
V
DD
/4
SHO REF
REF
MAX1098/MAX1099
MAX1098/MAX1099 10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
www.maximintegrated.com
Maxim Integrated │ 11