XE8802MI035LF Semtech, XE8802MI035LF Datasheet - Page 128

• Manufacturer Part Number: XE8802MI035LF
• Description: IC DAS 16BIT FLASH 8K 100-LQFP
• Manufacturer: Semtech

Specifications of XE8802MI035LF

• Applications: Sensing Machine
• Core Processor: RISC
• Program Memory Type: FLASH (22 kB)
• Controller Series: XE8000
• Ram Size: 1K x 8
• Interface: SPI, UART
• Number Of I /o: 36
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• For Use With: XE8000MP - PROG BOARD AND PROSTART2 CARD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

to remain within the ADC input range.
17.7.8
During low-speed operation, the bias current in the PGAs and ADC can be programmed to save power using the
control words IB_AMP_PGA[1:0] and IB_AMP_ADC[1:0] (see Table 17-26). If the system is idle, the PGAs and
ADC can even be disabled, thus, reducing power consumption to its minimum. This can considerably improve
battery lifetime.
17.8 Specifications and Measured Curves
This section presents measurement results for the acquisition chain. A summary table with circuit specifications
and measured curves are given.
17.8.1
Unless otherwise specified, the measurement conditions are the following:
© Semtech 2006
V
IN
Power Saving Modes
Default Settings
,
ADC
≤
Temperature T
V
RC frequency f
Offsets GDOff
Power operation: normal (IB_AMP_ADC[1:0] = IB_AMP_PGA[1:0] = '11')
Resolution:
Table 17-26. ADC & PGA power saving modes and maximum sampling frequency
DD
1
2
⋅
= +5V, GND = 0V, V
(
V
REFP
IB_AMP_ADC
[1:0]
−
V
00
01
10
11
x
REFN
2
A
RC
= GDOff
for n = 12 bits: OSR = 32 and N
= +25°C
)
= 2MHz, sampling frequency f
⋅
OSR
o
OSR
IB_AMP_PGA
3
+
for n = 16 bits: OSR = 512 and N
[1:0]
REF
= 0
1
00
01
10
11
XE8802 Sensing Machine Data Acquisition MCU
x
= +5V, V
(V)
1/4⋅I
1/2⋅I
3/4⋅I
Current
IN
ADC
Bias
I
ADC
17-16
= 0V
x
ADC
ADC
ADC
with ZoomingADC™ and LCD driver
Current
1/4⋅I
1/2⋅I
3/4⋅I
PGA
Bias
I
ELCONV
S
PGA
x
= 500kHz
PGA
PGA
PGA
= 4
Max. f
(Eq. 20)
[kHz]
62.5
62.5
125
250
500
125
250
500
ELCONV
S
= 2
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