ZAMC4100 Datasheet, PDF (85/155 Pages) Integrated Device Technology – Actuator and Motor Controller

ZAMC4100 Datasheet
External temperature measurement
For a basic understanding of external temperature measurement for the diode-based sensor, the equation below
provides a temperature measurement result (unsigned) within RESCODE (other additional factors apply in final
applications; contact IDT for more details using the contact information on page 155):
RESCODE = 32 ∗T[K] ∗ ^{k ∗ ln(10)} ∗ ²¹⁰
q
V_REF [V]
RESCODE =
T[K]
0.1538 ∗V_REF[V]
Where: q = elementary charge (1.60217646 x 10^-19)
k = Boltzmann constant (1.3806503 x 10^-23)
Internal temperature measurement
The formula for temperature calculation in correspondence with the conversion unsigned result is
T[ °C]
=
⎜⎜⎝⎛
V_REF [V]
3072 ∗ S_VT
∗ 10³
[mV/ °C]
(512
+
RESCODE)_{⎟⎟⎠⎞}
−
⎜⎜⎝⎛
V_t27[V] ∗10³
S_VT [mV/ °C]
⎟⎟⎠⎞
+
27
Where the parameter S_VT is the voltage/temperature slope of the internal temperature sensor and V_t27 is the
output voltage at 27°C (both specified in Table 1.11).
3.12.5. ADC Configuration and ADC Status Register
ZAMC4100 ADC configurations define the conversion rate, result format (sign and justification) and continuous
conversion mode in the ADCCONF register. The mapping of bits in this register is described in Table 3.37 and the
purpose of the bits is described in the following sections.
The interrupt flags of the ADC module are allocated in the ADCSTAT register described in Table 3.39.
© 2016 Integrated Device Technology, Inc.
85
January 26, 2016