SHT21_15 Datasheet, PDF (11/14 Pages) List of Unclassifed Manufacturers – Humidity and Temperature Sensor IC

Datasheet SHT21
frame at diced edge is not covered with respective
protective coating. The total weight of the sensor is 25mg.
8.2 Filter Cap and Sockets
For SHT2x a filter cap SF2 will is available. It is designed
for fast response times and compact size. Please find the
datasheet on Sensirion’s web page.
For testing of SHT2x sensors sockets, such as from
Plastronics, part number 10LQ50S13030 are
recommended (see e.g. www.locknest.com).
8.3 Traceability Information
All SHT2x are laser marked with an alphanumeric, five-
digit code on the sensor – see Figure 19.
The marking on the sensor consists of two lines with five
digits each. The first line denotes the sensor type
(SHT21). The first digit of the second line defines the
output mode (D = digital, Sensibus and I²C, P = PWM, S =
SDM). The second digit defines the manufacturing year (0
= 2010, 1 = 2011, etc.). The last three digits represent an
alphanumeric tracking code. That code can be decoded by
Sensirion only and allows for tracking on batch level
through production, calibration and testing – and will be
provided upon justified request.
SHT21
D0AC4
Figure 19 Laser marking on SHT21. For details see text.
Reels are also labeled, as displayed in Figure 20 and
Figure 21, and give additional traceability information.
Lot No.:
Quantity:
RoHS:
Lot No.
XXO-NN-YRRRTTTTT
RRRR
Compliant
Figure 20: First label on reel: XX = Sensor Type (21 for SHT21),
O = Output mode (D = Digital, P = PWM, S = SDM), NN =
product revision no., Y = last digit of year, RRR = number of
sensors on reel divided by 10 (200 for 2000 units), TTTTT =
Traceability Code.
Device Type: 1-100PPP-NN
Description:
Humidity & Temperature Sensor
SHTxx
Part Order No. 1-100PPP-NN or Customer Number
Date of Delivery: DD.MM.YYYY
Order Code: 46CCCC / 0
Figure 21: Second label on reel: For Device Type and Part
Order Number (See Packaging Information on page 2), Delivery
Date (also Date Code) is date of packaging of sensors (DD =
day, MM = month, YYYY = year), CCCC = Sensirion order
number.
8.4 Shipping Package
SHT2x are provided in tape & reel shipment packaging,
sealed into antistatic ESD bags. Standard packaging sizes
are 400, 1500 and 5000 units per reel. For SHT21, each
reel contains 440mm (55 pockets) header tape and
200mm (25 pockets) trailer tape.
The drawing of the packaging tapes with sensor
orientation is shown in Figure 22. The reels are provided in
sealed antistatic bags.
8.0
2.0
Ø1.5 MIN
0.3
4.0
Ø1.5 MIN
R0.3 MAX
1.3
3.3
0.25
R0.25
Figure 22 Sketch of packaging tape and sensor orientation.
Header tape is to the right and trailer tape to the left on this
sketch.
9 Compatibility to SHT1x / 7x protocol
SHT2x sensors may be run by communicating with the
Sensirion specific communication protocol used for SHT1x
and SHT7x. In case such protocol is applied please refer
to the communication chapter of datasheet SHT1x or
SHT7x. Please note that reserved status bits of user
register must not be changed.
Please understand that with the SHT1x/7x communication
protocol only functions described in respective datasheets
can be used with the exception of the OTP Reload
function that is not set to default on SHT2x. As an
alternative to OTP Reload the soft reset may be used.
www.sensirion.com
Version 4 – May 2014
11/14