T4223B-MC ATMEL [ATMEL Corporation], T4223B-MC Datasheet

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T4223B-MC

Manufacturer Part Number
T4223B-MC
Description
Time-Code Receiver with A/D Converter
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
Time-Code Receiver with A/D Converter
Description
The U4223B is a bipolar integrated straight-through receiver circuit in the frequency range of 40 kHz to 80 kHz.
The device is designed for radio-controlled clock applications.
Features
D Very low power consumption
D Very high sensitivity
D High selectivity by using two crystal filters
D Power-down mode available
Block Diagram
Ordering and Package Information
Rev. A7, 06-Mar-01
U4223B-MFS
U4223B-MFSG3
T4223B-MF
T4223B-MC
Extended Type Number
GND
VCC
IN
1
3
2
SB
4
Power supply
Q1A Q1B Q2A Q2B
PON
5
amplifier
16
AGC
6
SSO20 plastic
SSO20 plastic
No
No
CLK D3
14
Figure 1. Block diagram
12
15
17
Package
Impulse
D2
circuit
ADC
18
D Only a few external components necessary
D 4-bit digital output
D AGC hold mode
D1
19
D0
20
REC
Rectifier &
7
integrator
Decoder
Taping according to IEC-286-3
Die on foil
Die on carrier
INT
8
11
13
10
9
Remarks
U4223B
FLB
FLA
DEC
SL
1 (18)

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T4223B-MC Summary of contents

Page 1

... Power supply GND 3 2 amplifier Q1A Q1B Q2A Q2B Ordering and Package Information Extended Type Number U4223B-MFS U4223B-MFSG3 T4223B-MF T4223B-MC Rev. A7, 06-Mar-01 D Only a few external components necessary D 4-bit digital output D AGC hold mode CLK ADC ...

Page 2

U4223B Pin Description 1 VCC GND SB 4 Q1A 5 U4223B Q1B 6 REC 7 INT 8 DEC 9 FLA 10 Figure 2. Pinning IN A ferrite antenna is connected between IN and VCC. For high sensitivity, ...

Page 3

Q1A, Q1B In order to achieve a high selectivity, a crystal is con- nected between the Pins Q1A and Q1B used with the serial resonant frequency of the time-code transmitter (e.g., 60 kHz WWVB, 77.5 kHz DCF or ...

Page 4

U4223B Q2A, Q2B According to Q1A/Q1B, a crystal is connected between the Pins Q2A and Q2B used with the serial resonant frequency of the time-code transmitter (e.g., 60 kHz WWVB, 77.5 kHz DCF or 40 kHz JG2AS). The ...

Page 5

V clk mV 100 Now, the time-code signal can be read Falling edge initiates time-code conversion Now, the AGC value can be read Rising edge initiates AGC signal conversion Figure 14. In order ...

Page 6

U4223B Temperature compensation of the resonant frequency is a must if the clock is used at different temperatures. Please ask your supplier of bar antenna material and of capacitors for specified values of the temperature coefficient. Furthermore, some critical parasitics ...

Page 7

Parameters ADC; D0, D1, D2, D3 Pins 17, 18, 19 and 20 Output voltage HIGH R LOAD LOW R LOAD Output current HIGH V TCO LOW V TCO Input current into DEC Falling slope of CLK (first bit) Input current ...

Page 8

U4223B Test Circuit (for Fundamental Function) Vd 300k 300k 1.657V Sd0 Sd1 Sd2 Vd0 Vd1 Vd2 D2 D1 CONVERTER D0 Ivcc 100k VCC STABILISATION Iin IN 1M GND Vcc 3V ~ Vin Vsb 8 (18) Ipon 300k 300k Sd3 Spon ...

Page 9

Rev. A7, 06-Mar-01 Î Î Î Field strength Î Î Î Time-code signal Î Î Î ...

Page 10

U4223B Application Circuit for DCF 77.5 kHz +V CC Ferrite 1 Antenna 77.5 kHz res U4223B 77.5 kHz 6 ...

Page 11

Application Circuit for JG2AS 40 kHz +V CC Ferrite 1 Antenna kHz res kHz 680 pF 8 220 ...

Page 12

... U4223B PAD Coordinates The T4223B is also available as die for “chip-on-board” mounting. DIE size: 2.26 x 2.09 mm 100 x 100 mm (contact window mm) PAD size: 300 mm " Thickness: SYMBOL X-Axis/mm IN1 128 IN 128 GND 354 SB 698 Q1A 1040 Q1B 1290 REC ...

Page 13

Information on the German Transmitter Station: DCF 77, Frequency 77.5 kHz, Transmitting power coding when required Example:19. seconds Start Bit Modulation The carrier amplitude is ...

Page 14

U4223B Information on the British Transmitter Station: MSF Frequency 60 kHz Transmitting power 50 kW Location: Teddington, Middlesex year Switch over to the next time frame 0 1 500 ms 500 ms Example ...

Page 15

Information on the US Transmitter Station: WWVB Frequency 60 kHz Transmitting power minutes hours Example: UTC 18. seconds minutes Frame-reference marker Modulation ...

Page 16

U4223B Information on the Japanese Transmitter Station: JG2AS Frequency 40 kHz Transmitting power minutes hours Example: 18. seconds Frame-reference marker (FRM) Position-identifier marker ...

Page 17

Package Information Package SSO20 Dimensions in mm 6.75 6.50 0.25 0.65 5. Rev. A7, 06-Mar-01 5.7 5.3 4.5 4.3 1.30 0.15 0.05 6.6 6.3 11 technical drawings according to DIN specifications 10 U4223B 0.15 13007 17 (18) ...

Page 18

U4223B Ozone Depleting Substances Policy Statement It is the policy of Atmel Germany GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating ...

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