pca8885 NXP Semiconductors, pca8885 Datasheet - Page 17

• Manufacturer Part Number: pca8885
• Description: Capacitive 8-channel Proximity Switch With Auto-calibration And Very Low Power Consumption
• Manufacturer: NXP Semiconductors

NXP Semiconductors
11. Power architecture
PCA8885
Objective data sheet
The circuit has an integrated voltage regulator, supplied by pin V
provides an internal V
If a stable and noise free external supply voltage with 2.5 V < V
in the system, V
this case V
consumption, the internal voltage regulator should be shut down by setting bit VROF
logic 1 (see
While the analog part of the circuit is powered from V
registers are powered from V
mode, and the register values are maintained when V
Figure 8
the operational range of the PCA8885. The analog part of the circuit and the switch logic
is powered from V
Therefore the I
maintained when V
Fig 7.
Fig 8.
V
V
V
DD(max)
lockin
DD(min)
illustrates the behavior of the integrated voltage regulator. The gray area covers
2.5 V < V
Connection of V
Integrated voltage regulator behavior
DD
Table 6 on page
and V
2
C interface remains accessible in sleep mode, and the register values are
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DD(INTREGD)
DD(ext)
DD(INTREGD)
DD(INTREGD)
DD(INTREGD)
Rev. 1 — 24 November 2011
DD(INTREGD)
< 3.3 V.
DD(ext)
ΔV
Capacitive 8-channel proximity switch with auto-calibration
DD(INTREGD)
can be provided from the external source (see
10).
DD
. The I
operational range of PCA8885
is powered off.
. Therefore the I
must both be connected to V
PCA8885
supply of nominally 2.8 V.
2
C interface and the registers are powered from V
V
DD
V
DD(INTREGD)
2
V
C interface remains accessible in sleep
DD(INTREGD)
DD(INTREGD)
DD(INTREGD)
013aaa577
V
DD(ext)
DD(ext)
V
DD(ext)
, the I
DD
DD
is powered off.
. To reduce the current
. The regulator
2
< 3.3 V is available
PCA8885
C interface and the
© NXP B.V. 2011. All rights reserved.
V
V
V
V
DD(max)
lockin
DD(INTREGD)
DD(min)
Figure
013aaa574
7). In
17 of 43
DD
.