Pin Function Grouping

flux

Grouped the ADXL335BCPZ pins by function with no duplicate pin assignments: Power = VS pins, Ground/Common = COM pins, Analog Outputs = XOUT/YOUT/ZOUT, Control = ST, No Connect = NC pins, and Exposed Pad kept separate because it is not internally connected. Full grouping is in the ADXL335BCPZ Pin Function Groups project file.
adrian95

adrian95

Add those function groups to the symbol pin organization.

flux

I've made a plan, and started work on it.

Started implementing a plan

#Goal

- Add the previously determined ADXL335BCPZ datasheet-based function groups (Power, Ground/Common, Analog Outputs, Control, No Connect, Exposed Pad) to the part symbol pin organization, ensuring that each pin is assigned to exactly one group and no pin is duplicated.

#Implementation plan

1. Review the ADXL335BCPZ published part project to inspect all terminal elements and their pin properties.

1. Identify and list the pins as per datasheet mappings: VS (Power), COM (Ground/Common), XOUT, YOUT, ZOUT (Analog Outputs), ST (Control), NC (No Connect), and any Exposed Pad if present.

2. Update the symbol pin organization by assigning functional groups:

1. Set the VS pin to group "Power".

2. Set the COM pin to group "Ground/Common".

3. Set the XOUT, YOUT, and ZOUT pins to group "Analog Outputs".

4. Set the ST pin to group "Control".

5. Set the NC pin to group "No Connect".

6. Ensure the Exposed Pad pin (if present) is maintained separately from internal connections.

3. Verify that every terminal is assigned exactly one group and that there are no duplicate assignments across the groups.

1. Perform a review of the symbol properties in the project.

2. Confirm that each functional group is exclusive and accurately reflects the datasheet functions.

#Success criteria

- All pins from the ADXL335BCPZ part are assigned to exactly one corresponding group.

- No pin is duplicated in more than one group.

- The symbol pin organization matches the datasheet-based functional groups as specified.

Task completed.

0:37

Thought for 9 sec — Planning project organization
Accessing knowledge.
Read schematic.
Read schematic.

Set Pin Group to "Power" on VS_1 and VS_2, Set Section to "Power" on VS_1 and VS_2, and 10 more changes

Set VS_1's Pin Group to "Power"

Set VS_1's Section to "Power"

Set VS_2's Pin Group to "Power"

Set VS_2's Section to "Power"

Set COM_1's Pin Group to "Ground/Common"

Set COM_1's Section to "Ground/Common"

Set COM_2's Pin Group to "Ground/Common"

Set COM_2's Section to "Ground/Common"

Set COM_3's Pin Group to "Ground/Common"

Set COM_3's Section to "Ground/Common"

Set COM_4's Pin Group to "Ground/Common"

Set COM_4's Section to "Ground/Common"

Set XOUT's Pin Group to "Analog Outputs"

Set XOUT's Section to "Analog Outputs"

Set YOUT's Pin Group to "Analog Outputs"

Set YOUT's Section to "Analog Outputs"

Set ZOUT's Pin Group to "Analog Outputs"

Set ZOUT's Section to "Analog Outputs"

Set ST's Pin Group to "Control"

Set ST's Section to "Control"

Set NC_1's Pin Group to "No Connect"

Set NC_1's Section to "No Connect"

Set NC_2's Pin Group to "No Connect"

Set NC_2's Section to "No Connect"

Set NC_3's Pin Group to "No Connect"

Set NC_3's Section to "No Connect"

Set NC_4's Pin Group to "No Connect"

Set NC_4's Section to "No Connect"

Set NC_5's Pin Group to "No Connect"

Set NC_5's Section to "No Connect"

Set NC_6's Pin Group to "No Connect"

Set NC_6's Section to "No Connect"

Set EP's Pin Group to "Exposed Pad"

Set EP's Section to "Exposed Pad"

flux

Updated the ADXL335BCPZ symbol pin organization: VS pins are Power, COM pins are Ground/Common, XOUT/YOUT/ZOUT are Analog Outputs, ST is Control, NC pins are No Connect, and EP is Exposed Pad. Verified all 17 terminals now have exactly one matching Pin Group/Section assignment with no duplicated pins across groups.
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ADXL335BCPZ Pin Function Groups
Source reviewed: ADXL335 datasheet, “Pin Configuration and Function Descriptions” for the 16-lead LFCSP package.
Grouping rule used: each physical pin is assigned to exactly one functional group, so no pin is duplicated across groups.

Table

Group / SectionPinsPin namesSuggested Flux Pin TypeSuggested Pin GroupNotes
Power14, 15VS, VSPower InPowerSupply voltage pins. These are the main supply pins.
Ground / Common3, 5, 6, 7COM, COM, COM, COMGroundGroundCommon/return pins. Treat all COM pins as ground/common.
Analog Outputs8, 10, 12ZOUT, YOUT, XOUTOutputOutputAcceleration analog voltage outputs for Z, Y, and X axes.
Control / Self-Test2STInputControlSelf-test input pin.
No Connect1, 4, 9, 11, 13, 16NC, NC, NC, NC, NC, NCNot ConnectedNCNo-connect pins. Datasheet notes NC pins are not internally connected; they can be tied to COM unless otherwise noted.
Exposed PadEPExposed PadNot Connected or Ground*Exposed PadDatasheet notes the exposed pad is not internally connected, but should be soldered for mechanical integrity. If Flux requires a terminal for it, keep it in its own group so it is not mixed with electrical COM pins.
*For Flux pin typing, I would prefer Not Connected for the exposed pad because it is not internally connected electrically. If your part workflow wants all soldered pads represented as mechanical/ground-like terminals, label it clearly as Exposed Pad rather than grouping it with COM.
Per-pin assignment list

Table

PinNameSectionPin GroupPin TypeShort description
1NCNo ConnectNCNot ConnectedNo connect
2STControlControlInputSelf-test input
3COMGroundGroundGroundCommon ground
4NCNo ConnectNCNot ConnectedNo connect
5COMGroundGroundGroundCommon ground
6COMGroundGroundGroundCommon ground
7COMGroundGroundGroundCommon ground
8ZOUTAnalog OutputsOutputOutputZ-axis output
9NCNo ConnectNCNot ConnectedNo connect
10YOUTAnalog OutputsOutputOutputY-axis output
11NCNo ConnectNCNot ConnectedNo connect
12XOUTAnalog OutputsOutputOutputX-axis output
13NCNo ConnectNCNot ConnectedNo connect
14VSPowerPowerPower InSupply voltage
15VSPowerPowerPower InSupply voltage
16NCNo ConnectNCNot ConnectedNo connect
EPExposed PadExposed PadExposed PadNot ConnectedMechanical pad
Rationale
  • VS pins belong together as Power.
  • COM pins belong together as Ground / Common.
  • XOUT, YOUT, and ZOUT are the three accelerometer analog signal outputs, so they belong together as Analog Outputs.
  • ST is a unique control input, so it gets its own Control / Self-Test group.
  • NC pins are explicitly no-connect pins, so they get a No Connect group.
  • The exposed pad is not internally connected, so it should not be grouped with COM electrically, even though it is soldered for mechanical integrity.

    Recommended functional groups

    Per-pin assignment list

    Rationale

Documents

    ADXL335BCPZ Pin Function Groups

Assets

stp

ADXL335BCPZ.stp

3D_ADXL335BCPZ3D Model
kicad_mod

ADXL335BCPZ.kicad_mod

FP_ADXL335BCPZFootprint
image-removebg-preview.png

image-removebg-preview.png

image-removebg-previewThumbnail

ADXL335BCPZ

ADXL335BCPZ thumbnail
Accelerometer X, Y, Z Axis ±3g 1.6kHz (X,Y), 550Hz (Z) 16-LFCSP-LQ (4x4)
The ADXL335BCPZ is a small, thin, low-power, complete 3-axis accelerometer with signal-conditioned voltage outputs. It measures acceleration with a minimum full-scale range of ±3 g. The device outputs analog voltages proportional to acceleration in each of the three orthogonal axes (X, Y, and Z).
The accelerometer is designed for low power consumption and high resolution, making it suitable for mobile devices, tilt sensing, motion detection, and vibration monitoring. It operates over a wide temperature range and requires minimal external components, enabling easy integration into compact systems.
Functional Overview
The ADXL335 uses a capacitive sensing structure to detect acceleration. Changes in acceleration result in differential capacitance changes, which are converted into voltage outputs through an internal signal conditioning circuit. Each axis provides an independent analog output that can be directly interfaced with ADC inputs of microcontrollers or other processing units.
Bandwidth for each axis can be adjusted using external capacitors, allowing flexibility depending on application requirements.
Electrical Characteristics
Supply Voltage Range: 1.8 V to 3.6 V
Supply Current: Typical: 350 µA
Measurement Range: ±3 g
Sensitivity (Typical): 300 mV/g
Zero-g Bias Level: Approximately mid-supply voltage
Bandwidth: User-selectable via external capacitors Typical range: X, Y axes: up to 1600 Hz Z axis: up to 550 Hz
Output Characteristics
Output Type: Analog voltage (ratiometric to supply voltage)
Number of Axes: Three (X, Y, Z)
Output Noise: Low noise suitable for precision motion sensing
Cross-Axis Sensitivity: Typically ±1%
Mechanical Characteristics
Package Type: 16-lead LFCSP (Lead Frame Chip Scale Package)
Dimensions: Approximately 4 mm × 4 mm × 1.45 mm
Mounting: Surface mount
Environmental Specifications
Operating Temperature Range: −40°C to +85°C
Shock Survivability: Up to 10,000 g
Interface Requirements
External Components: Requires capacitors for bandwidth setting (one per axis)
Output Interface: Direct analog output compatible with ADC inputs
Applications
Mobile devices and handheld electronics Tilt and orientation sensing Vibration monitoring systems Gaming and motion input devices Industrial instrumentation Wearable electronics
Key Features
Low power consumption Compact form factor High resolution analog outputs User-adjustable bandwidth Wide operating temperature range Simple integration with minimal external components
#commonpartslibrary #sensor #transducer #motionsensor #accelerometer

Properties

Accelerometer

Analog Devices Inc.

ADXL335BCPZ

analog.com/media/en/technical-documentation/data-sheets/ADXL335.pdf

AC

creativecommons.org/licenses/by/4.0/

parametric-v1

Pricing & Availability

Distributor

Qty 1

Controls