SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER

Rev F3, Page 18/32

OPERATING MODES

In order to calibrate iC-MSB, compensate for the input

signals and test iC-MSB the mode of operation must be

changed. The output function changes according to the

various operating modes; the line drivers and protection

against reverse polarity facility are only active in normal

mode.

MODE(3:0)

Addr. 0x02; bit 3:0

BYP

Addr. 0x0D; bit 5

Code

Operating Mode

Pin PS

Pin NS

Pin PC

Pin NC

Pin PZ

Pin NZ

Pin ERR

0x00

Normal operation

PS

NS

PC

NC

PZ

NZ

ERR

0x01

Calibration 1

TANA0(2)

VREFI0

VREFI12

IBN

PZI

NZI

ERR

0x02

Calibration 2, BYP = 0

Calibration 2, BYP = 1*

PCH1

X4

NCH1

X6

PCH2

X3

NCH2

X5

VDC1

X1

VDC2

X2

—

0x03

iC-Haus Test 1

VPAH

VPD

—

CGUCK

IPF

V05

IERR

0x04

iC-Haus Test 2

PS_out

NS_out

PC_out

NC_out

PZ_out

NZ_out

IERR

0x05

iC-Haus Test 3

PS_out

NS_out

PC_out

NC_out

PZ_out

NZ_out

ERR

0x06

iC-Haus Test 4, BYP = 0

iC-Haus Test 4, BYP = 1*

TANA12(0)

X4

TANA12(1)

X6

TANA12(2)

X3

TANA12(3)

X5

TANA12(4)

X1

TANA12(5)

X2

IERR

0x07

Calibration 3

VTs

VTth

—

—

—

—

ERR

0x08

Saturation low

SCL, SDA and ERR low

0x09

—

—

—

—

—

—

—

—

0x0A

iC-Haus Test 5

TP

CLK6

—

—

—

—

—

0x0B

—

—

—

—

—

—

—

—

0x0C

—

—

—

—

—

—

—

—

0x0D

—

—

—

—

—

—

—

—

0x0E

IDDQ-Test

All PU/PD resistors, oscillator and supply voltage deactivated

0x0F

—

—

—

—

—

—

—

—

Notes

Analog calibration signals are output via approx. 5 kΩ source impedance (see Elec. Char. No.507).

For accuracy of calibration the signal frequency should not exceed 2 kHz (see Elec. Char. No.508).

* Bypass function: inputs (without voltage divider) to outputs, approx. 7 kΩ source impedance (see Elec. Char. No.509).

Table 13: Selection of Operating Modes

Calibration Op. Modes

In Calibration Mode 1 the user can measure the BIAS

current (IBN), input amplifier reference potential VREFI

and the analog signals from channel 0 following signal

conditioning (PCH0 and NCH0).

In Calibration Mode 2 the conditioned signals from

channels 1 and 2 are output (PCH1, NCH1, PCH2

and NCH2). In addition the intermediate potentials of

the compensating circuits are also available for CH1

(VDC1) and CH2 (VDC2).

In Calibration Mode 3 the internal temperature monitor-

ing signals are provided.

Special Device Test Functions

IDDQ-Test, Saturation Low, Saturation High, and Test

1 to 5 are test modes for iC-Haus device tests. With

an activated bypass (BYP = 1), mode iC-Haus Test 4

permits the direct feedthrough of X1 - X6 input signals

to the output pins; in this instance the output impedance

is high-ohmic. Furthermore, if the input voltage divider

is selected (by RINx = 1- -1), it reduces the signal ampli-

tudes to approx. 7/8.

Signal Filter

iC-MSB has a noise limiting signal filter to filter the con-

ditioned analog signals. This can be activated using

ENF.

ENF

Adr 0x0E, bit 7

Code

Function

0

Noise limiter deactivated

1

Noise limiter activated

Table 14: Signal Filtering