XE8805 SEMTECH [Semtech Corporation], XE8805 Datasheet - Page 15

• Manufacturer Part Number: XE8805
• Description: Data Acquisition MCU
• Manufacturer: SEMTECH [Semtech Corporation]

Figure 2-4. Operation range of the different circuit blocks
2.4 Current consumption
The tables below give the current consumption for the circuit in different configurations. The figures are indicative
only and may change as a function of the actual software implemented in the circuit.
Table 2-5 gives the current consumption for the flash version of the circuit. The peripherals are disabled. The
parallel ports A and B are configured in input with pull up, the parallel port C is configured as an output. Their pins
are not connected externally. The pin RESET is connected to VSS and the pin VPP/TEST is connected to VBAT.
The inputs of the acquisition chain are connected to VSS.
Table 2-5. Typical current consumption of the XE8805 version (8k instructions flash memory)
Operation mode
High speed CPU
Low power CPU
Low power time
keeping
Fast
time keeping
Immediate wake-
up time keeping
VLD static current
16 bit resolution
data acquisition
12 bit , gain 100,
data acquisition
1. PGA disabled, ADC enabled, 16 bit resolution
2. PGA 1 disabled, PGA 2 and 3 enabled, ADC enabled, 12 bit resolution
For more information concerning the current consumption of the zoomingADC
consumption in the acquisition chain documentation which shows the current consumption of this block as a
function of temperature and voltage and for different configurations of the PGA and ADC.
The power consumption of the ROM version of the circuit is identical if it is configured as shown in Figure 2-2. In
the high speed configuration, the current consumption will increase proportional with VBAT.
© Semtech 2006
wake-up
0
32 kIPS
1 MIPS
HALT
HALT
HALT
HALT
HALT
CPU
2.15
CPU
parallel and serial ports
RC and crystal oscillator
VLD
Counters and PWM
DAS (without amplifier)
2.4
100 kHz
1 MHz
Ready
2 MHz
2 MHz
RC
acquisition chain
voltage multiplier
DAB
Off
Off
32 kHz
32 kHz
32kHz
Xtal
Off
Off
Off
Off
Consumption
3.3
2-5
310 µA
190 µA
460 µA
1.0 µA
1.7 µA
1.4 µA
10 µA
15 µA
VBAT (V)
comments
2.4V<>5.5V, 27°C
2.4V <>5.5V, 27°C
2.4V <>5.5V, 27°C
2.4V <>5.5V, 27°C
2.4V <>5.5V, 27°C
2.4V <>5.5V, 27°C
3.0V, 27°C
3.0V, 27°C
TM
, see the chapter power
Note
1
2
XE8805/05A
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