Vicom Systems FC-FC3 Instrukcja Użytkownika Pobierz pdf (Strona 22)

CONFIDENTIAL [AK8999A/AW/AD]

MS1600-E-00 2014/05

- 22 -

7.2.6.2) Sensitivity Temperature Drift Adjustment Circuit

VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note

Parameter Symbol Conditions Min. Typ. Max.

Units

Description

Measurement in test mode after offset voltage and span voltage adjustment

order

coeff.

Adj. range

DS1+ ESTP/N[8] = 0h

ESTP/N[7:0] = 8Bh

+2500

ppm/C

DS1- ESTP/N[8] = 1h

ESTP/N[7:0] = DEh

-4000

ppm/C

Adj. step DS stp 18

ppm/



Note) Design reference value; no production test performed.

7.2.7) LPF, S/H & Buffer

VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note

Parameter Symbol Conditions Min. Typ. Max.

Units

Description

Measurement in test mode after offset voltage and span voltage adjustment

LPF cufoff

frequency

Fc1

40 60 80

kHz

S/H&Buffer gain SHG 1.935 2.222 2.523 times

S/H&Buffer out

pre-adj. error

SHerr

-65 65

BUF gain adj.

width

Bufg

1.000 1.111 1.222

times

VOUT output

voltage range

Vbuf+ Load resistance

9.5kΩ

(to VDD or VSS)

0.98

*VDD

Vbuf- 0.02

*VDD

BUF feedback

resistor value

Rbuf

102 146 190



7.2.8) Level shift

VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note

Parameter Symbol Conditions Min. Typ. Max.

Units

Description

Measurement in test mode after offset voltage and span voltage adjustment

Output reference

Voltage

adj. width

(Level shift)

Vlv+

Max

ELV[8] = 1h

ELV[7:0]

FFh

1.00

*VDD

V Note1)

Vlv-

Min

ELV[8] = 0h

ELV[7:0]

FFh

0.00

*VDD

V Note1)

Adj. step

Vlstp 0.002

*VDD

Note1) It is limited from 0.02*VDD to 0.98*VDD by the VOUT output range (Vbuf+, Vbuf-).

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