Data Sheet

ADXL356/ADXL357/ADXL357B

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

analog.com

Rev. C | 13 of 52

Figure 6. ADXL356 Pin Configuration

Table 9. ADXL356 Pin Function Descriptions

Pin No.

Mnemonic

Description

1

RANGE

Range Selection Pin. Set this pin to ground to select the ±10 g range, or set this pin to VDDIO to select the ±20 g or ±40 g range. This

pin is model dependent (see the Ordering Guide section).

2

ST1

Self Test Pin 1. This pin enables self test mode. This pin must be forced low when not in self test mode.

3

ST2

Self Test Pin 2. This pin activates electromechanical self test actuation. This pin must be forced low when not in self test mode.

4

TEMP

Temperature Sensor Output.

5

VDDIO

Digital Interface Supply Voltage.

6

VSSIO

Digital Ground.

7

STBY

Standby or Measurement Mode Selection Pin. Set this pin to ground to enter standby mode, or set this pin to VDDIO to enter

measurement mode.

8

V1P8DIG

Digital Supply. This pin requires a decoupling capacitor. If VSUPPLY connects to VSS, supply the voltage to this pin externally.

9

VSS

Analog Ground.

10

V1P8ANA

Analog Supply. This pin requires a decoupling capacitor. If VSUPPLY connects to VSS, supply the voltage to this pin externally.

11

VSUPPLY

Supply Voltage. When VSUPPLY equals 2.25 V to 3.6 V, VSUPPLY enables the internal LDO regulators to generate V1P8DIG and V1P8ANA.

For VSUPPLY = VSS, V1P8DIG and V1P8ANA are externally supplied.

12

XOUT

X-Axis Output.

13

YOUT

Y-Axis Output.

14

ZOUT

Z-Axis Output.

Figure 7. ADXL357 and ADXL357B Pin Configuration (SPI/I2C)

Table 10. ADXL357 and ADXL357B Pin Function Descriptions

Pin No.

Mnemonic

Description

1

CS /SCL

Chip Select for SPI ( CS ).

Serial Communications Clock for I2C (SCL).

2

SCLK/VSSIO

Serial Communications Clock for SPI (SCLK).

I2C Mode Enable (VSSIO). Connect this pin to Pin 6 (VSSIO) to enable I2C mode.

3

MOSI/SDA

Main Output, Subordinate Input for SPI (MOSI).

Serial Data for I2C (SDA).

4

MISO/ASEL

Main Input, Subordinate Output for SPI (MISO).

Alternate I2C Address Select for I2C (ASEL).