XE8805AMI000 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

XE8805AMI000

Sensing Machine Data Acquisition MCU with Zooming ADC and DACs

Semtech Corporation 

XE8805/05A

Table 2-4. Operating range of the Flash memory

Retention time at 85°C

Retention time at 55°C

Number of programming cycles

Min. Max.

10

100

10

years

years

Note

1

1

2

1. Valid only if programmed using a programming tool that is qualified

2. 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.

2.3 Supply configurations

2.3.1

Flash circuit

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.

VBAT

VREG

VMULT

VSS

Cvmult

Cvreg

2.4V – 5.5V

Figure 2-1. Supply configuration for the flash circuit.

2.3.2

ROM circuit

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 Low power operation

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

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2-3

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