ADMCF341BR datasheet(2/36 Pages) AD

Part #	ADMCF341BR

Description	DashDSP??28-Lead Flash Mixed-Signal DSP with Enhanced Analog Front End

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ADMCF341–SPECIFICATIONS

ANALOG-TO-DIGITAL CONVERTER

Parameter

Min

Typ

Max

Unit

Conditions/Comments

Signal Input

0.3

3.5

V

VAUX0, VAUX1, VAUX2

Resolution

1

12

Bits

Linearity Error

2

3

4

Bits

Zero Offset

3

–32

0

+7

mV

Comparator Delay

600

ns

ADC High Level Input Current

2

+10

mAVIN = 3.5 V

ADC Low Level Input Current

2

–10

mAVIN = 0.0 V

NOTES

1Resolution varies with PWM switching frequency (double update mode) 78.1 kHz = 8 bits, 4.9 kHz = 12 bits.

22.44KHz sample frequency, VAUX0, VAUX1, VAUX2.

3Extrapolated point outside of operating range. 2.44KHz sample frequency.

Specifications subject to change without notice.

ISENSE AMPLIFIER–TRIP

Parameter

Min

Typ

Max

Unit

Conditions/Comments

ISENSE Signal Operating Range

–400

+400

mV

ISENSE Signal Input Range

–800

+800

mV

ISENSE Gain

–2.6

–2.51

–2.34

%

VIN = –400 mV to +400 mV

ISENSE Gain Channel Matching

5.5

%

VIN = –400 mV to +400 mV

ISENSE Gain Stability

1

0.8

%

VIN = –400 mV to +400 mV

ISENSE Linearity

2

89

Bits

ISENSE Internal Offset Voltage

2

1.68

1.87

2.1

V

ISENSE Internal Offset Stability

2

2.1

%

ISENSE Signal-to-Noise Ratio (SNRD)

3

51

dB

ISENSE Signal-to-Noise Ratio Less Distortion

54

dB

(SNR)3

–40

dB

ISENSE Total Harmonic Distortion

3

–53

dB

ISENSE Input Current

–130

+10

mAVIN = –400 mV to +400 mV

ISENSE Input Resistance

11.5

k

W

TRIP Threshold Low

–690

–430

mV

TRIP Threshold High

+430

+690

mV

TRIP Minimum Pulsewidth4

5

ms

NOTES

1Variation of gain with V

DD and temperature.

2V

IN = –400 mV to +400 mV.

3f

IN = 1 kHz sine wave, VIN = –400 mV to +400 mV, fS = 4 kHz.

4High or low trip threshold.

CURRENT SOURCE1

Parameter

Min

Typ

Max

Unit

Conditions/Comments

Programming Resolution

3

Bits

Tuned Current

2

91

100

109

mA

NOTES

1For ADC calibration.

20.3 V to 3.5 V I

CONST voltage.

(VDD = 5%, GND = 0 V. TA = –40 C to +85 C. CLKIN = 10 MHz, unless

otherwise noted.)

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