Datasheet ADS1015

VDD
GND
AIN0
VDD
GND
AIN1
VDD
GND
AIN2
VDD
GND
AIN3
AIN
P
AIN
N
GND
ADS1015
Copyright © 2016, Texas Instruments Incorporated
11
ADS1013 , ADS1014 , ADS1015
www.ti.com SBAS473E –MAY 2009–REVISED JANUARY 2018
Product Folder Links: ADS1013 ADS1014 ADS1015
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8.3 Feature Description
8.3.1 Multiplexer
The ADS1015 contains an input multiplexer (MUX), as shown in Figure 10. Either four single-ended or two
differential signals can be measured. Additionally, AIN0 and AIN1 may be measured differentially to AIN3. The
multiplexer is configured by bits MUX[2:0] in the Config register. When single-ended signals are measured, the
negative input of the ADC is internally connected to GND by a switch within the multiplexer.
Figure 10. Input Multiplexer
The ADS1013 and ADS1014 do not have an input multiplexer and can measure either one differential signal or
one single-ended signal. For single-ended measurements, connect the AIN1 pin to GND externally. In
subsequent sections of this data sheet, AIN
P
refers to AIN0 and AIN
N
refers to AIN1 for the ADS1013 and
ADS1014.
Electrostatic discharge (ESD) diodes connected to VDD and GND protect the ADS101x analog inputs. Keep the
absolute voltage of any input within the range shown in Equation 1 to prevent the ESD diodes from turning on.
GND – 0.3 V < V
(AINX)
< VDD + 0.3 V (1)
If the voltages on the input pins can potentially violate these conditions, use external Schottky diodes and series
resistors to limit the input current to safe values (see the Absolute Maximum Ratings table).