CAV444 Datasheet, PDF (11/12 Pages) Analog Devices – C/V transmitter IC with adjustable output voltage for capacitive input signals

CAV444 – C/V transmitter IC
with adjustable output voltage
for capacitive input signals
APPLICATIONS
Example applications are generated by dimensioning the circuit in Figure 5 with the help of the
calibration program Kali_CAV444.xls [1]
BLOCK DIAGRAM AND PINOUT
PIN NAME DESCRIPTION
1
RCM Current setting for the measurement oscillator
2
RCW Current setting for the f/V converter
3
VB
Bias voltage Æ V_CC
4
GAIN Gain setting
5
VOUT Output voltage
6
VREF Reference voltage 2.5 V
7
VTEMP Temperature sensor output
8
N.C.
Not connected
9
N.C.
Not connected
10 GND IC ground
11 VCC Supply voltage
12 CM
Measurement capacitor/measurement oscillator
capacitor
13 CF2
Lowpass capacitor 2, corner frequency 2
14 RA
Stabilizing resistor for f/V converter
15 CF1
Lowpass capacitor 1, corner frequency 1
16 CW
f/V converter capacitor
Table 4: CAV444 Pin out
RCM
1
RCW
2
VB
3
GAIN 4
VOUT 5
VREF 6
VTEMP 7
N.C.
8
16 CW
15 CF1
14 RA
13 CF2
12 CM
11 VCC
10 GND
9 N.C.
Figure 10: CAV444 Pin out
DELIVERY
CAV444 is available as:
• An SO16 (n); see data sheets: package
• For sample batches CAV444 can be supplied on a DIL16 SO16 adapter (CAV444Adapt)
Package dimensions: see http://www.analogmicro.de/products/analogmicro.de.en.package.pdf
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Phone: [phone]
Fax: [phone]
Internet: http://www.analogmicro.de
Email: [e-mail]
Mai 2010 - Rev 1.1 - Page 11/12