MC33690 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC33690

Standalone Tag Reader Circuit

Freescale Semiconductor 

Tag Reader

15 Tag Reader

Typical values reflect average measurements at 6V ≤ VSUP ≤ 16V, VSS = 0V, TJ = –40°C to +125°C, unless otherwise noted

Table 9. Tag Reader Specifications

Parameter

Symbol

Test Conditions

and Comments

Min Typ Max Unit Type

Demodulator (pin RD)

2.0 Input Voltage Range

2.2 Input Modulation Frequency

2.3 Demodulator Sensitivity

2.31 Demodulator Sensitivity

2.4 Demodulation Delay

2.5 After Write Pulse Settling Time

2.6 Recovery Time after wake-up or

reset from clock stable to

demodulator valid output

VINRD

—

3

4

5

V—

FMOD

—

0.5

4

8 kHz —

VSENSE1

6.5V ≤ VSUP ≤ 16V

—

5

15 mV —

Sensitivity is measured in the

following application

conditions: IANTENNA = 50mA

peak, VRD = 4V peak,

CEXT = 10nF, and square wave

modulation FMOD = FTD1/32.

See Figure 12

VSENSE2

6V ≤ VSUP < 6.5V

—

7

30 mV —

The sensitivity is measured in

the following application

conditions:

IANTENNA = 50mA peak,

VRD = 4V peak, CEXT = 10nF,

and square wave modulation

FMOD = FTD1/32

See Figure 12

tDemod

Configuration C

—

7.5

10

μs —

Not including the delay due to

the slew rate of the K output for

configurations A and B

See figure 12

tSettling1

—

—

tSettling2 Clock stable condition implies —

VXTAL1 meets the specification

(see page 15).

394 400 μs —

646 700 μs —

Drivers (pins TD1, TD2)

Output Carrier Frequency to Crystal

3.5 Frequency Ratio

RFTD/FXT

AL

3.0 Turn on/off Delay

ton/off

3.1 Driver1/2 Low Side Out. Resistance RTDL

3.2 Driver1/2 High Side Out. Resistance RTDH

—

—

ILOAD = 150mA DC

ILOAD = -150mA DC

—

64

— ——

—

— 250 ns —

—

2.4

4

Ω—

—

2.1

4

Ω—

MC33690 Standalone Tag Reader Circuit, Rev. 5

16

Freescale Semiconductor

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