MC34940 datasheet(7/9 Pages) FREESCALE

tên linh kiện	MC34940

Giải thích chi tiết về linh kiện	Electric Field Imaging Device

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MC34940

Sensors

Freescale Semiconductor

7

BASIC CONNECTIONS

Pin Descriptions

Figure 6 Pin Descriptions

Figure 7 Simplified Application Diagram

Table 5. Electrode Selection

Terminal/SIGNAL

C

B

A

No electrodes selected

0

E1

0

1

E2

0

1

0

E3

0

1

E4

1

0

E5

1

0

1

E6

1

0

E7

1

N/C

E7

E6

E5

E4

E3

E2

E1

TEST

GND

SHIELD

AGND

DGND

N/C

SHIELDEN

C

B

A

LEVEL

LPCAP

ROSC

VDDCAP

VPWR

VCCCAP

Table 6. Pin Description

Number

Pin Name

Definition

1

DGND

Connected to the ground return

2, 24

N/C

These pins should be left open.

3

SHIELDEN

Used to enable the shield signal

4,5,6

C, B, A

Controls electrode or reference activity

7

LEVEL

This is the detected, amplified, and

offset representation of the signal

voltage on the selected electrode

8

LPCAP

A capacitor on this pin forms a low pass

filter with the internal series resistance

from the detector to this pin

9

ROSC

A resistor from this pin to circuit ground

determines the operating frequency of

the oscillator

10

VDDCAP

A 47

µF capacitor is connected to this

pin to filter the internal analog regulated

supply

11

VPWR

12 V power applied to this pin will be

converted to the internal regulated

voltages needed to operate the part

12

VCCCAP

A 47

µF capacitor is connected to this

pin to filter the internal digital regulated

supply

13

AGND

Connected to the ground return of the

analog circuitry

14

SHIELD

Connects to cable shields to cancel

cable capacitance.

15

GND

Main IC ground

16

TEST

Connect to circuit ground

17-23

E1–E7

Electrode pins

MC34940

Field Electrodes

(E1 through E7)

MCU

SHIELDEN

AGND

TEST

ROSC

GND

VDDCAP

E1

E7

SHIELD

VPWR

Analog In

Electrode Select

Shield Enable

LPCAP

LEVEL

A, B, C

VCCCAP

3

+12V

39k

10nF

47uF

Số phần tương tự - MC34940

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
NXP Semiconductors	MC34903	4Mb / 16P	System Basis Chip with CAN High Speed and LIN Interface Rev. 4.0, 10/2013
	MC34903CP3EK/R2	4Mb / 16P	System Basis Chip with CAN High Speed and LIN Interface Rev. 4.0, 10/2013
	MC34903CP5EK/R2	4Mb / 16P	System Basis Chip with CAN High Speed and LIN Interface Rev. 4.0, 10/2013
	MC34903CS3EK/R2	4Mb / 16P	System Basis Chip with CAN High Speed and LIN Interface Rev. 4.0, 10/2013
	MC34903CS5EK/R2	4Mb / 16P	System Basis Chip with CAN High Speed and LIN Interface Rev. 4.0, 10/2013

More results

Mô tả tương tự - MC34940

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Freescale Semiconductor...	MC33794	390Kb / 18P	Electric Field Imaging Device
Motorola, Inc	MC33794	491Kb / 20P	Electric Field Imaging Device
NXP Semiconductors	MC33941	269Kb / 11P	Electric Field Imaging Device Rev. 4
NXP Semiconductors	MC33794	461Kb / 18P	Electric Field Imaging Device Rev 9, 11/2006
Freescale Semiconductor...	MC33941	321Kb / 11P	Electric Field Imaging Device
Freescale Semiconductor...	MC33941	229Kb / 11P	Electric Field Imaging Device
Vaisala	EFM550	1Mb / 2P	Thunderstorm Electric Field Mill EFM550
DATEL, Inc.	ADCDS-1403EX-C	101Kb / 1P	Electronic Imaging
	ADS-CCD1201-C883	101Kb / 1P	Electronic Imaging
	ADS-CCD1201G883	102Kb / 1P	Electronic Imaging

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