xe8805a Semtech Corporation, xe8805a Datasheet - Page 13
xe8805a
Manufacturer Part Number
xe8805a
Description
Xe8805a Sensing Machine With 16 + 10 Bit Zoomingadc? And Buffered Dac, Low-power Microcontroller Based Sensor Interface Ic
Manufacturer
Semtech Corporation
Datasheet
1.XE8805A.pdf
(156 pages)
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Part Number:
xe8805aMI028LF
Manufacturer:
SEMTECH/美国升特
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Table 2-4. Operating range of the Flash memory
Retention time at 85°C
Retention time at 55°C
Number of programming cycles
2.3 Supply configurations
2.3.1
The flash version of the circuit can be run from a supply between 2.4V and 5.5V (Figure 2-1). The capacitor on
VREG has to be connected at all times (value in Table 2-2) to guarantee proper operation of the device. The
capacitor on VMULT is only required if the circuit is to be operated below 3V.
Figure 2-1. Supply configuration for the flash circuit.
2.3.2
For the ROM version, two possible operating modes exist: with and without voltage regulator. Using the voltage
regulator, low power consumption will be obtained even with supply voltages above 2.4V. Without the voltage
regulator (i.e. VREG short-circuited to VBAT), a higher speed can be obtained.
2.3.2.1
In this case, the internal voltage regulator is used in order to maintain low power consumption independent from
the supply voltage. The capacitor on VREG has to be connected at all times (value in Table 2-3) to guarantee
proper operation of the device. The capacitor on VMULT has to be connected only when VBAT<3V.
© Semtech 2006
1.
2.
Valid only if programmed using a programming tool that is qualified
Circuits can be programmed more than 10 times but after that, the retention time is no longer guaranteed.
All qualification tests have been done after 10 cycles.
Flash circuit
ROM circuit
Low power operation
VMULT
VBAT
VREG
VSS
C
vmult
C
vreg
2-3
Min.
2.4V – 5.5V
100
10
10
Max.
years
years
Note
1
1
2
XE8805/05A
www.semtech.com
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