CAV414 datasheet(3/6 Pages) AME

3 / 6 page

Converter IC for Capacitive Signals

CAV414

analog microelectronics

January 2001

3/6

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Voltage Reference VM

Voltage

1.90

2.15

VM vs. Temperature

dVM /dTTamb = –40...+85°C

ppm/°C

Current

IVM

Source

µA

IVM

Sink

-5

µA

Load Capacitance

CVM

100

120

Instrumentation Amplifier Input Stage

Internal Gain

GIA

4.9

5.1

Differential Range

VIN

400

Common Mode Input Range

CMIR

VCC < 9V, ICV < 2mA

1.5

VCC - 3

CMIR

VCC ≥ 9V, ICV < 2mA

1.5

6.0

Common Mode Rejection Ratio

CMRR

Power Supply Rejection Ratio

PSRR

IOUT ≤ 1mA

Offset Voltage

VOS

1.5

6mV

VOS vs. Temperature

dVOS /dT

µV/°C

Output Stage

Adjustable Gain

GOP

Input Range

VCC < 11V

VCC - 5

VCC ≥ 11V

Power Supply Rejection Ratio

PSRR

IOUT ≤ 1mA

Offset Voltage

VOS

0.5

2mV

VOS vs. Temperature

dVOS /dT

µV/°C

Input Bias Current

IB vs. Temperature

dIB /dT

720

pA/°C

Output Voltage Range

VOUT

VCC < 19V

VCC - 5

VOUT

VCC ≥ 19V

014

Output Current Limitation

ILIM

VCC ≥ 10V

Output Current

IOUT

ILIM

Load Resistance

Ω

Load Capacitance

500

Protection Functions

Protection Against Reverse Polarity

Ground vs. VCC vs. VOUT

Note:

The oscillator capacity has to be chosen in the following way: COSC = 1.6 ⋅ CX1

The capacitor range of CX1 and CX2 can be extended whereby the system performance is reduced and the electrical

limits are exceeded.

Currents flowing into the IC, are negative.

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