AD7879-1ACPZ-RL Analog Devices Inc, AD7879-1ACPZ-RL Datasheet - Page 16
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AD7879-1ACPZ-RL
Manufacturer Part Number
AD7879-1ACPZ-RL
Description
IC ADC 12BIT CTLR TOUCH 16LFCSP
Manufacturer
Analog Devices Inc
Type
Resistiver
Specifications of AD7879-1ACPZ-RL
Resolution (bits)
12 b
Data Interface
I²C, Serial
Touch Panel Interface
4-Wire
Number Of Inputs/keys
1 TSC
Data Rate/sampling Rate (sps, Bps)
105k
Voltage Reference
External
Voltage - Supply
1.6 V ~ 3.6 V
Current - Supply
10nA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-LFCSP
Voltage Supply Source
Single Supply
Sampling Rate (per Second)
105k
Sampling Rate
105kSPS
Supply Voltage Range - Analog
1.6V To 3.6V
Supply Current
480µA
Digital Ic Case Style
CSP
No. Of Pins
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
AD7879/AD7889
Temperature Calculations
If an explicit temperature reading in degrees Celsius is required,
calculate for the single-measurement method as follows:
1.
2.
3.
4.
5.
Calculate the scale factor of the ADC in degrees per LSB.
Degrees per LSB = ADC LSB size/−2.1 mV =
(V
Save the ADC output, D
T
Take the ADC reading, D
measured, T
Calculate the difference in degrees between T
∆T = (D
Add ∆T to T
CAL
CC
.
/4096)/−2.1 mV
AMB
− D
AMB
CAL
.
.
CAL
) × degrees per LSB
CAL
AMB
, at the calibration temperature,
, at the temperature to be
CAL
and T
AMB
Rev. C | Page 16 of 40
by
Example
Using V
The ADC output is 983 decimal at 25°C, equivalent to a diode
forward voltage of 0.6 V.
The ADC output at T
Degrees per LSB = (2.5/4096)/−2.1 × 10
∆T = (880 − 983) × −0.291 = 30°C
T
AMB
CC
= 25 + 30 = 55°C
= 2.5 V as reference,
AMB
is 880.
−3
= −0.291