Model 1221 Low Noise Analog Accelerometer
62/'(5,1*ꢀ5(&200(1'$7,216ꢁ
Reflow using a hotplate is the preferred method for assembling the model 1221 surface mount accelerometer to your
Printed circuit board. Sn62 or Sn63 type solder is recommended. Hand soldering using a fine tipped soldering iron is
possible but difficult without a steady hand and some form of visual magnification due to the small size of the connections.
When using the hand solder iron method, it’s best to purchase the J-Leaded version (1221J) for easier visual inspection
of the finished solder joints.
Pre-Tinning of Accelerometer Leads is Recommended: To prevent gold migration embrittlement of the solder joints,
it is best to pre-tin the accelerometer leads. The solder bath method of pre-tinning is not recommended due to the high
degree of heat the interior of the device gets subjected to which may cause permanent shifts in the bias and scale factor.
Instead, we recommend tinning one lead at a time, to prevent excessive heating of the accelerometer, using a fine-tipped
solder iron and solder wire.
Hotplate Attach Method using Solder Paste or Solder Wire: Apply solder to the circuit board’s pads using Sn62 or Sn63
solder paste or pre-tin the pads using solder and a fine tipped soldering iron. If pre-tinning with an iron, apply flux to the
tinned pads prior to placing the components. Place the accelerometer in its proper position onto the pasted or tinned pads
then place the entire assembly onto a hotplate that has been pre-heated to 200°C. Leave on hotplate only long enough
for the solder to flow on all pads (DO NOT OVERHEAT!)
Solder Iron Attach Method using Solder Paste: Apply solder paste to the circuit board’s pads where the accelerometer
will be attached. Place the accelerometer in its proper position onto the pasted pads. Press gently on the top of the
accelerometer with an appropriate tool to keep it from moving and heat one of the corner pads, then an opposite corner
pad with the soldering iron. Make sure the accelerometer is positioned so all 20 of its connections are centered on the
board’s pads. Once the two opposite corner pads are soldered, the part is secure to the board and you can work your way
around soldering the remaining 18 connections. Allow the accelerometer to cool in between soldering each pin to prevent
overheating.
Solder Iron Attach Method using Solder Wire: Solder pre-tin two opposite corner pads on the circuit board where the
accelerometer will be attached. Place the accelerometer in its proper position onto the board. Press gently on the top of
the accelerometer and heat one of the corner pads that was tinned and the part will drop down through the solder and seat
on the board. Do the same at the opposite corner pad that was tinned. Make sure the accelerometer is positioned so all
20 of its connections are centered on the board’s pads. Once the two opposite corner pads are soldered, the part is secure
to the board and you can work your way around soldering the remaining 18 connections. Allow the accelerometer to cool
in between soldering each pin to prevent overheating.
LCC & JLCC Solder Contact Plating Information: The plating composition and thickness for the solder pads and
castellations on the “L” suffix (LCC) package are 100 to 225 micro-inches thick of gold (Au) over 80 to 350 micro-inches
thick of nickel (Ni) over a minimum of 5 micro-inches thick of moly-manganese or tungsten refractory material. The leads
for the “J” suffix (JLCC) package are made of CDA102 copper (Cu) have the same gold over nickel plating thicknesses
as for the LCC pads.
Recommended Solder Pad Pattern: The recommended solder pad size and shape for both the LCC and J-LCC
packages is shown in the diagram and table below. These dimensions are recommendations only and may or may not
be optimum for your particular soldering process.
DIM
A
inch
.230
.430
.100
.033
.050
.013
.120
mm
5.84
10.92
2.54
0.84
1.27
0.33
3.05
B
C
D
E
F
G
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Silicon Designs, Inc. 1445 NW Mall Street, Issaquah, WA 98027-5344
Phone: 425-391-8329
Fax: 425-391-0446
Aug 05
web site: www.silicondesigns.com
[page 6]
5秒后页面跳转
NTC热敏电阻与PTC热敏电阻的应用原理及应用范围
GTO与普通晶闸管相比为什么可以自关断？为什么普通晶闸管不能呢？从GTO原理、应用范围带你了解原因及推荐型号
LF353数据手册解读：特性、应用、封装、引脚说明、电气参数及替换型号推荐
A4950资料手册解读：特性、应用、封装、引脚功能、电气参数及代换型号
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
