How we pay for things is about to change dramaticallyMay 29, 2015 · NFC: Theory of Operation ... • NFC performance relies on effective energy transfer for high quality data transmission

LitePoint NFC Test Solutions 2015/5/29

Commercial in Confidence 1

Pi Huang

电子支付时代来临电子支付时代来临电子支付时代来临电子支付时代来临: 您准备好测试您准备好测试您准备好测试您准备好测试

NFC了了了了吗吗吗吗？？？？

How we pay for things is about to

change dramatically



© 2014 LitePoint Corp. LitePoint Confidential Information

Apple Pay


Apple Pay Drives NFC Adoption

• 1 million users activated

Apple Pay in the first 72 hours

after launch

• Google Wallet has seen transaction

volumes jumping 50% and new users doubled 2 months after Apple Pay is

announced



NFC technology could virtually

eliminate

the need to carry cash or credit cards

However…


It must work every time




• A large third-party payment service in China, recently unveiled a

plan to launch smart phone based NFC subway ticketing service in

multiple Chinese cities

• The initial trial in the Beijing subway system was not pretty……

• 50% of the phones tested do not pass all the readers in the ~200

stations

A Real Case: 50% of Phones Failed!




Manufacturing test challenges


NFC: Theory of Operation

• NFC relies on the coupling of two highly tuned, low frequency, narrowband coils-The coils provide strong electromagnetic mutual induction

resonance, i.e. they become a tuned pair.

• Q factor is typically high to allow efficient transfer of energy, i.e. path loss between coils is minimized with high Q-Small variation in resonant circuitry can significantly affect Q,

therefore system performance.




NFC IC

C

LC

R

R• Insufficient drive

level from IC

• Drift in film thickness

changes coil’s resonant

frequency, Q factor, or

LRC seen by matching

components.

• Poor contact to PCB (coil

on battery or back cover)

• Bad/missing component(s)

• Wrong component(s)

• Component tolerance variation

• Bad solder joint(s)

• NFC performance relies on effective energy transfer for high quality data transmission.• Analog variations in any of these three areas will affect overall NFC performance.• Poor NFC performance will directly impact customer product satisfaction.

Integrated Circuit Matching Components Coil

Where Can Things Go Wrong with NFC

Potential Failure

Mechanisms:

Functional

Blocks:


Small Shifts Have Large Performance Impacts(5% variations in component tolerance values—shifts power and frequency)

Production Issues

• Wrong value components

• Wrong tolerance components

• Bad components

Performance Impact

• Higher power consumption

• Reduced operating range

Poor User Experience

• Financial transactions fail

• Denied entry to mass transit

• etc.

500 kHz shifton a 13 MHz signal

(4% shift)




High Failure Rate Found in Commercial Phones(Data taken from a sampling of NFC-enabled Smart Phones (NFC-A, Card Emulation mode), using IQnfc)

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

DUT-A1

DUT-A2

DUT-A3

DUT-A4

DUT-A5

DUT-A6

DUT-A7

DUT-A8

DUT-A9

DUT-B1

DUT-B2

DUT-B3

DUT-B4

DUT-B5

Failure Rate over 100 Runs

1st Pass Fail Rate

2nd Pass Fail Rate

Test Failure

Rate

Note: Devices with high failure rate re-run to confirm results


• You only know that a device has

passed or failed

Fully

Functioning

Marginally

Functioning

Failing

• Marginal devices get into

consumers’ hands

FailingMarginally

Functioning

Pass/Fail Testing Is a Poor Choice

Golden DUT

Pass/Fail



Here comes IQnfc…


IQnfc Brings Revolution to NFC Testing

Single integrated box supports physical layer

measurements of all key NFC standards, making it a powerful tool for lab & Manufacturing testing




LitePoint IQnfc

1. Tests all NFC

standards at physical

layer

3. Fast as or faster than

pass/fail testing

2. Quantitative

testing, not

pass/fail


IQnfc Solution Hardware at a Glance

Single-insertion testing

Universal coil covers all NFC

proximity standards, keeping test

time to under 5 seconds

Compatible with all key NFC chipsets:

Use of reduced signal stack eliminates

need for PC-based DUT drivers, and

enables system rollout in just a few hours

Everything Needed for Easy Setup:

Monitor, transceiver, and control cables included,

along with universal test head and test instrument

Built for the manufacturing floor

Rugged 1U design can handle demanding factory conditions to

maximize up-time and minimize maintenance




IQnfc Universal Test Head: many coils into 1

LitePoint UTH


IQnfc Solution GUI at a Glance

User friendly GUI for detailed RF parametric results- Frequency sweep mode- Initiator mode- Target mode




IQnfc Solution Software at a Glance

Test Plan Editor for fast setup

Fast and easy way to configure IQnfc

and set test limits

Intuitive, easy-to-use Interface

One-click operation minimizes need

for operator training…get up and running

in minutes


IQnfc Value Proposition in Production

Ensure quality for

greater product

differentiation

Monitor production shift

and detect issues earlyReduce chance of

product return/recall

Build brand loyalty




IQnfc Summary

• Enables manufacturers to monitor and manage their production lines to ensure product quality -Measure key performance parameters such as Resonant

frequency, Q, Field Strength, LMA

• High-throughput solution-Single insertion testing; 5 second typical test time-Less time than typically used for multi-insertion, pass/fail testing

• Deploys in minutes-Single universal coil covers all key

standards-Turn-key software solution

Documents

How we pay for things is about to change dramaticallyMay 29, 2015 · NFC: Theory of Operation ... • NFC performance relies on effective energy transfer for high quality data transmission