SHTW2 datasheet(9/14 Pages) ETC2

9 / 14 page

www.sensirion.com

Version 2 – August 2016

9/14

6 Quality

6.1 Environmental Stability

Qualification of the SHTW2 is performed based on the

JEDEC JESD47 qualification test method.

6.2 Material Contents

The SHTW2 is RoHS and REACH compliant.

7 Package and Traceability

SHTW2 sensors are provided in a flip chip package with

an outline of 1.31 × 0.74 × 0.54 mm3 and 4 solder balls

with a pitch of 0.4 mm. The humidity sensor is centered on

the bottomside of the package. The top side of the

package is protected with a black epoxy layer. This is

called back side coating, because it is applied to the non-

functional (back) side of the chip.

For a proper measurement it is important that the humidity

sensor has good access to the ambient air and is not

obstructed by underfill or other material. Therefor the

SHTW2 must be assembled without underfill adhesive.

The SHTW2 package consists of silicon and lead-free

solder balls . To protect the product from mechanical

damage, any mechanical impact on the package shall be

avoided. Any vertical or lateral force onto the package

(e.g. during handling, assembly and in the application)

shall not exceed 2N.

The Moisture Sensitivity Level classification of the SHTW2

is MSL1, according to IPC/JEDEC J-STD-020.

All SHTW2 sensors are marked for easy identification and

traceability. The marking on the sensor consists of a 5-

digit, alphanumeric tracking code and a pin-1 indicator.

The pin-1 indicator is located in the top left corner. The

bottom side contains a pin-1 indicator shaped as a

teardrop around the solder ball of pin 1. See Figure 9 for

illustration.

Figure 9 Top side marking (left side): pin-1 indicator and 5-digit

alphanumeric tracking code. Bottom side marking (right side):

pin-1 indicator.

8 Ordering Information

The SHTW2 can be ordered in tape and reel packaging

with different reel sizes. The sensors are supplied in reels

with a diameter of 330 mm (7 inches), sealed into

antistatic ESD bags. A drawing of the packaging tape with

sensor orientation is shown in Figure 12

Quantity Packaging

Reel Diameter

Order Number

1’000

Tape & Reel 180 mm (7 inch) 1-101484-01

10’000

Tape & Reel 180 mm (7 inch) 1-101380-01

Table 14 SHTW2 ordering options.

humidity

sensor

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