FEDL610Q435-䋰2
LAPIS Semiconductor
ML610Q435/ML610Q436
31/35
AC CHARACTERISTICS (RC Oscillation A/D Converter)
(V
DD
= 1.3 to 3.6V, AV
DD
= 2.2 to 3.6V, V
SS
= AV
SS
= 0V, Ta = 20 to +70qC, unless otherwise specified)
Rating
Parameter Symbol Condition
Min. Typ. Max.
Unit
Resistors for oscillation
RS0, RS1,
RT0,
RT0-1,RT1
CS0, CT0, CS1 t 740pF 1 k:
f
OSC1
Resistor for oscillation = 1k: 209.4 330.6 435.1 kHz
f
OSC2
Resistor for oscillation = 10k: 41.29 55.27 64.16 kHz
Oscillation frequency
VDD = 1.5V
f
OSC3
Resistor for oscillation = 100k: 4.71 5.97 7.06 kHz
Kf1 RT0, RT0-1, RT1 = 1kHz 5.567 5.982 6.225
Kf2 RT0, RT0-1, RT1 = 10kHz 0.99 1 1.01
RS to RT oscillation frequency
ratio
*1
VDD = 1.5V
Kf3 RT0, RT0-1, RT1 = 100kHz 0.104 0.108 0.118
f
OSC1
Resistor for oscillation = 1k: 407.3 486.7 594.6 kHz
f
OSC2
Resistor for oscillation = 10k: 49.76 59.28 72.76 kHz
Oscillation frequency
VDD = 3.0V
f
OSC3
Resistor for oscillation = 100k: 5.04 5.993 7.04 kHz
Kf1 RT0, RT0-1, RT1 = 1kHz 8.006 8.210 8.416
Kf2 RT0, RT0-1, RT1 = 10kHz 0.99 1 1.01
RS to RT oscillation frequency
ratio
*1
VDD = 3.0V
Kf3 RT0, RT0-1, RT1 = 100kHz 0.100 0.108 0.115
*1: Kfx is the ratio of the oscillation frequency by the sensor resistor to the oscillation frequency by the reference resistor on the same
conditions.
f
OSCX
(RT0CS0 oscillation) f
OSCX
(RT0-1CS0 oscillation) f
OSCX
(RT1CS1 oscillation)
Kfx =
f
OSCX
(RS0CS0 oscillation) , f
OSCX
(RS0CS0 oscillation) , f
OSCX
(RS1CS1 oscillation)
(x = 1, 2, 3)
Note:
- Please have the shortest layout for the common node (wiring patterns which are connected to the external capacitors, resistors
and IN0/IN1 pin), including CVR0/CVR1. Especially, do not have long wire between IN0/IN1 and RS0/RS1. The coupling
capacitance on the wires may occur incorrect A/D conversion. Also, please do not have signals which may be a source of noise
around the node.
- When RT0/RT1 (Thermistor and etc.) requires long wiring due to the restricted placement, please have VSS(GND) trace next to
the signal.
- Please make wiring to components (capacitor, resisteor and etc.) necessory for objective measurement. Wiring to reserved
components may affect to the A/D conversion operation by noise the components itself may have.
V
DD
AV
DD
V
REF
V
DDL
V
DDX
C
L1
C
L0
C
X
V
SS
AV
SS
C
V
RT0, RT0-1, RT1: 1k: /10k:/100k:
RS0, RS1: 10k:
CS0, CT0, CS1: 560pF
CVR0, CVR1: 820pF
RCM
Frequency measurement
(f
OSCX
)
Input pins
VIH
VIL
*1: Input logic circuit to
determine the specified
measuring conditions.
(*1)
CS0
RT0
IN1 CS1 RS1 RT1
CS0
RS0
RS0
RCT0
T0-1
CT0
RT0
CS1
RS1
RT1
IN0
CVR0 CVR1
