xe88lc05 ETC-unknow, xe88lc05 Datasheet - Page 30

• Manufacturer Part Number: xe88lc05
• Description: 16 10 Bit Data Acquisition Ultra Low-power Microcontroller
• Manufacturer: ETC-unknow

Data Acquisition Microcontroller
XE88LC05
8.12 Power Consumption
Table 8.8:
Figure 8.19:
Figure 8.20:
30
900
850
800
750
700
650
600
550
500
800
700
600
500
400
300
200
100
-50
2.5
-25
3.0
0
No PGAs, ADC only
Left figure below plots the variation of quiescent current consumption with supply voltage V
as well as the distribution between the 3 PGA stages and the ADC. As shown in the right figure,
quiescent current consumption is not greatly affected by sampling frequency. It can be seen
that the quiescent current varies by about 20% between 100kHz and 2MHz. Quiescent current
consumption vs. temperature is shown in the second set of figures, showing a relative increase
of nearly 40% between -45 and +85° C.
Typical quiescent current distributions in acquisition chain (n = 16 bits, f
Quiescent current versus supply voltage for different gains and clock speed (not using the
PGA and ADC low power modes)
Absolute and (b) relative change in quiescent current consumption vs. temperature
Supply Voltage - V
Temperature [°C]
3.5
PGA1 & 2 only
PGA1, 2 & 3
PGA1 only
V
V
25
Supply
DD
DD
= 5V
= 3V
4.0
50
DDA
4.5
[V]
75
ADC
250
190
5.0
100
125
5.5
PGA1
165
150
PGA2
130
120
-10
-15
-20
-25
800
750
700
650
600
550
500
20
15
10
-5
5
0
PGA3
-50
2.5
175
160
Sampling Frequency f
-25
3.0
TOTAL
Supply Voltage - V
720
620
0
3.5
Temperature [°C]
25
4.0
Unit
DDA
50
µA
µA
S
4.5
S
:
[V]
= 500kHz)
62.5kHz
500kHz
250kHz
75
5.0
100
D0109-40
5.5
125
DD
,