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KAD/ADC/129/S2

2

1 Jun. 2021 | DST/V/081

CURTISSWRIGHT.COM 

© 2021Curtiss-Wright. All rights reserved. Specifications are subject to change without notice. 
All trademarks are the property of their respective owners.

Specifications 

All  values  provided  in  the  following  specification  tables  are  valid  within  the  operating  temperature  range  specified  under
“Environmental ratings” in the “General specifications” table. Module specifications are met for up to 97% of Full Scale Range
(FSR).

TABLE 1

General specifications

PARAMETER

MIN.

TYP.

MAX.

UNITS

CONDITION/DETAILS

Slots

–

–

1

–

Can be placed in any user-slot in any combination.

Mass

–

90

–

g

–

3.17

–

oz

Design metric is grams.

Height above chassis

For recommended clearance requirements see the 

CON/KAD/002/CP

 data sheet.

bare connector

–

–

11

mm

bare connector

–

–

0.43

in.

Design metric is millimeters.

Access rate

–

–

2

Msps

Maximum combined access rate for read and write.

Power consumption

+5V

100

–

180

mA

+7V

15

–

30

mA

Excludes current used by excitation.

-7V

10

–

25

mA

Excludes current used by excitation.

+12V

50

–

80

mA

-12V

40

–

70

mA

total power

1.75

–

3.09

W

Particular combinations of chassis and Acra KAM-500 
modules may have power or current limitations. For details, 
see 

TEC/NOT/016 - Power dissipation, TEC/NOT/049 - Power estimation

, 

and the relevant chassis data sheet.

Environmental ratings

See 

Environmental Qualification Handbook

.

operating temperature

-40

–

85

°C

Chassis base/side plate temperature.

storage temperature

-55

–

105

°C

TABLE 2

Differential ended analog inputs

PARAMETER

MIN.

TYP.

MAX.

UNITS

CONDITION/DETAILS

Inputs

–

–

4

–

Sampling rate

While the sampling rate can be set individually, each must 
have a power of two times any other (¼, ½ ...2, 4).

ANALOG[3:0]

2

–

100,000

sps

Input voltage

operating range (G

p 

= 1)

-10

–

10

V

Primary gain = 1.

operating range (G

p 

= 10)

-1

–

1

V

Primary gain = 10.

operating range (G

p 

= 100)

-100

–

100

mV

Primary gain = 100.

operating range (G

p 

= 1000)

-10

–

10

mV

Primary gain = 1000.

overvoltage protection

-40

–

40

V

Voltages outside of this range can damage input.

Содержание KAD/ADC/129/S2

Страница 1: ...ADC 129 S2 is a hard wired state machine that over samples all channels at a rate between 200ksps and 400ksps and digitally filters any noise above the user programmable cutoff frequency This is achieved using cascaded half band decimate by 2 x 15 tap Finite Impulse Response FIR filters followed by an 8th order Butterworth Infinite Impulse Response IIR filter with a default cutoff point set at a q...

Страница 2: ...and write Power consumption 5V 100 180 mA 7V 15 30 mA Excludes current used by excitation 7V 10 25 mA Excludes current used by excitation 12V 50 80 mA 12V 40 70 mA total power 1 75 3 09 W Particular combinations of chassis and Acra KAM 500 modules may have power or current limitations For details see TEC NOT 016 Power dissipation TEC NOT 049 Power estimation and the relevant chassis data sheet Env...

Страница 3: ...3kHz fin 10kHz fs 100kHz fc fs 4 0 35 0 8 FSR For 10kHz fin 15kHz fs 100kHz fc fs 4 Effective number of bits gain 1 10 12 13 5 bits fc 25kHz and secondary gain of 1 fc filter cutoff frequency gain 100 11 5 12 5 bits fc 25kHz and secondary gain of 1 gain 1000 9 10 5 bits fc 25kHz and secondary gain of 1 Crosstalk gain 1 10 100 100 90 dB fin 25kHz and secondary gain of 1 gain 1000 80 72 dB fin 25kHz...

Страница 4: ...D 300 kΩ Module powered on measured at 3kHz TABLE 3 Bipolar DC voltage excitation outputs PARAMETER MIN TYP MAX UNITS CONDITION DETAILS Outputs 4 Applied per channel Output voltage operating range 0 5 1 V Bi polar excitation 5V is 10V across the bridge resolution 1 8 mV Bi polar excitation 1 8mV is 3 6mV across the bridge compliance 30 mA Per channel short circuit current 125 mA short circuit dura...

Страница 5: ...s than 0 01 FSR 200 times lower than the error specified here drift 0 15 FSR Over temperature noise gain 1 0 5 mVrms As measured on analog input noise gain 10 0 05 mVrms As measured on analog input noise gain 100 1000 0 01 mVrms As measured on analog input Output resistance 34 8 kΩ 1 The balance line is permanently connected to ANALOG x input The line is intended for balancing strain gages so the ...

Страница 6: ... sampling rate Excitation Amplitude 0 to 5 1 0 2 Required excitation in V for the top of the bridge Excitation is bipolar so entering 5V means 10V across the bridge Balance Type CurrentShunt CurrentShunt Specifies the balance type to be carried out on the bridge Balance Applied 71e 6 to 71e 6 0 Shunt current in A applied to the bridge Balance BalanceThisTime True False False Specifies if balancing...

Страница 7: ...ANALOG SENSE 1 GAIN 1 10 100 1000 INST AMP AAAF DIGITAL FILTER LOOKUP TABLE 34 8K R ADJ VADJ DIGITAL ANALOG VREF EXC_V 1 STANDARD BUS INTERFACE AND LOGIC SENSE 1 51 7 8 11 10 9 12 EXC_V 2 ANALOG 2 ANALOG 2 KAD ADC 129 S2 ANALOG DIGITAL COUNTS UNITS DIGITAL ANALOG SENSE 2 GAIN 1 10 100 1000 INST AMP AAAF DIGITAL FILTER LOOKUP TABLE 34 8K RADJ VADJ DIGITAL ANALOG V REF EXC_V 2 STANDARD BUS INTERFACE...

Страница 8: ...put configuration for the KAD ADC 129 S2 With this configuration the differential input amplifier removes common mode voltage or common mode pickup noise on the input lines For potentiometer circuits where the negative input is tied to ground excitation drift can have a direct impact on the input signal either as a gain or an offset error Note that excitation can drift up to 0 3 on an FSR of 5 1V ...

Страница 9: ...onfiguration connecting the signal to ANALOG x ANALOG x must be connected to ground This data sheet shows an example potentiometer application which is not affected by this gain error Modules with RADJ connected externally might show this additional gain error offset but only if the balance adjust circuit is used and in the cases stated previously NOTE Gain error can be compensated at post process...

Страница 10: ...t than suppression of aliasing set the same cutoff point on all channels even if the sampling rates are different Sense lines Sense lines are used to eliminate error due to voltage drop across lead resistance Sense lines can not be left unconnected they should be connected as close as possible to the bridge If however the sense lines are connected close to the module that is far from the bridge an...

Страница 11: ... top of bridge 15 EXC_V 2 Bipolar DC voltage excitation outputs Excitation to bottom of bridge 16 ANALOG 2 Differential ended analog inputs Analog input connected to internal adjust 17 ANALOG 2 Differential ended analog inputs Analog input 18 SENSE 2 Bipolar DC voltage excitation outputs Sense line from bottom of bridge 19 SENSE 3 Bipolar DC voltage excitation outputs Sense line from top of bridge...

Страница 12: ...r from the 7V power line for excitation and therefore cannot be used with KAM CHS 04L KAM CHS 05F KAM CHS 03F or KAM CHS 02F Revision history Supporting software Related documentation PART NUMBER DESCRIPTION KAD ADC 129 S2 Full bridge ADC voltage excitation programmable analog gain sense lines 25kHz b w 4ch at 100ksps REVISION DIFFERENCES STATUS KAD ADC 129 S2 First release Recommended for new pro...

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