Sensors

10

Freescale Semiconductor, Inc.

MMA26xxNKW

2.8

Dynamic Electrical Characteristics - Signal Chain

Notes:

1. Parameters tested 100% at final test at -40

°C, 25°C, and 105°C.

2. Parameters tested 100% at probe.

3. Verified by characterization.

4. * Indicates critical characteristic.

5. Verified by qualification testing, not tested in production.

6. Parameters verified by pass/fail testing in production.

7. Functionality guaranteed by modeling, simulation and/or design verification. Circuit integrity assured through IDDQ and scan testing. Timing

is determined by internal system clock frequency.

8. Verified by user system level characterization, not tested in production, or at component level.

9. Verified by Simulation.

10.Measured at final test. Self-test activation occurs under control of the test program.

11.Thermal resistance between the die junction and the exposed pad; cold plate is attached to the exposed pad.

12.Maximum voltage characterized. Minimum voltage tested 100% at final test. Maximum voltage tested 100% to 24V at final test.

13.N/A.

14.Sensitivity, and overload capability specifications will be reduced when 80Hz filter is selected.

15.Filter cutoff frequencies are directly dependent upon the internal oscillator frequency.

16.Target values. Actual values to be determined during device characterization.

#

Characteristic

Symbol

Min

Typ

Max

Units

110

Internal Oscillator Frequency

*

3.80

4

4.20

MHz

(1)

111

Data Interpolation Latency

⎯

s(7)

112

113

114

115

116

117

DSP Low-Pass Filter

Cutoff frequency LPF0 (referenced to 0 Hz)

Filter Order LPF0

Cutoff frequency LPF1 (referenced to 0 Hz)

Filter Order LPF1

Cutoff frequency LPF2 (referenced to 0 Hz)

Filter Order LPF2

171

⎯

380

⎯

760

⎯

180

2

400

4

800

4

189

⎯

420

⎯

840

⎯

Hz

1

Hz

1

Hz

1

(7)

(7)

(7)

(7)

(7)

(7)

118

119

Sensing Element Rolloff Frequency (-3 db)

±25g, ±50g, ±62.5g, ±125g

±187g, ±312g

938

3952

⎯

⎯

2592

14370

Hz

Hz

(9)

(9)

120

121

Sensing Element Natural Frequency

±25g, ±50g, ±62.5g, ±125g

±187g, ±312g

12651

26000

⎯

⎯

13871

28700

Hz

Hz

(9)

(9)

122

123

Sensing Element Damping Ratio

±25g, ±50g, ±62.5g, ±125g

±187g, ±312g

2.760

1.260

⎯

⎯

6.770

3.602

⎯

⎯

(9)

(9)

124

125

Sensing Element Delay (@100 Hz)

±25g, ±50g, ±62.5g, ±125g

±187g, ±312g

63

13

⎯

⎯

170

40

μs

μs

(9)

(9)

126

Package Resonance Frequency

100

⎯⎯

kHz

(9)