XE88LC01MI000 ETC1 [List of Unclassifed Manufacturers], XE88LC01MI000 Datasheet - Page 30

• Manufacturer Part Number: XE88LC01MI000
• Description: Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

8.12 Power Consumption
Table 8.8:
30
Figure 8.18:
Figure 8.19:
V
V
Supply
DD
DD
= 5V
= 3V
800
700
600
500
400
300
200
100
2.5
-0.1
-0.2
-0.3
-0.4
0.2
0.1
0.0
-50
3.0
ADC
250
190
No PGAs, ADC only
Offset error is defined as the output code error for a zero volt input (ideally, output code = 0).
The measured offset errors vs. temperature curves for different PGA gains are depicted in the
right figure below. The output offset error, expressed in (LSB), is normalized to 25°C.
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
-25
Gain and offset error vs temperature for several gains, normalized to 25°C, offset cancellation
disabled. When the offset cancellation is enabled, the offset remains below the LSB in all
temperature situations.
Quiescent current versus supply voltage for different gains and clock speed (not using the PGA and
ADC low power modes)
Supply Voltage - V
3.5
PGA1 & 2 only
PGA1, 2 & 3
PGA1 only
Temperature [°C]
PGA1
0
165
150
4.0
25
DDA
4.5
[V]
PGA2
130
120
50
5.0
75
5.5
1
5
20
100
PGA3
175
160
100
TOTAL
720
620
800
750
700
650
600
550
500
Unit
2.5
µA
µA
100
-20
-40
80
60
40
20
0
-50
Sampling Frequency f
3.0
-25
Supply Voltage - V
3.5
Temperature [°C]
0
4.0
Data Sheet XE88LC01
Data Acquisition Microcontroller
S
= 500kHz)
25
DDA
S
4.5
:
[V]
62.5kHz
500kHz
250kHz
50
5.0
75
5.5
D0202-60
1
5
20
100
100
DD
,