ETC AK2127 Receiver/ demodulator for time code signals transmitted by the transmitter Datasheet

GSG 勁力
半導体
Gunter Semiconductor GmbH
AK2127
EDITION 09/00
Receiver/ Demodulator for time
code signals transmitted by the
transmitter DCF77( Germany) ,
MSF(UK), or WWVB(USA)
For inquiry please contact :
China
Tel: 0086-755-3200442
Fax: 0086-755-3355520
Hong Kong
Tel : 00852-26190748
Fax: 00852-24948080
e-mail
[email protected]
Technical Data
TFA2127
Edition 09/00
Radio Controlled Clock Receiver
Short Description
Features
The TFA2127 is a bipolar integrated straight through
receiver circuit in the frequency range of 50...80 kHz.
The integrated circuit is designed for radio controlled
clock application with high sensitivity.
• Supply voltage range 1.2 ... 3.5 V
• Very high sensitivity < 1 µV
• High selectivity by X-tal resonator
• Start/stop-function available
• Complementary output stages
• Minimum external components
Package
1. Die
Pad-layout
9
11 10
12
8
13
7
14
6
- die measures:
5
- bond-pad measures: 100 µm x 100 µm
4
- die height:
320 µm ± 15 µm
3
- width of scribe line:
80 µm
TFA 2127 X
15
16
Die dimensions
1.8 mm x 2.1 mm
17
18 19
1 2
1.35 ± 0.1
2. SOP 16
only for test purposes
6.0 ± 0.2
≤ 2.00
9.9 ± 0.1
0.15 -
0.15
≤ 0.7
≥ 0.3
16
1
09/00
0.42 +- 0.07
0.06
1.27
15
2
14
3
13
4
12
5
11
10
9
6
7
8
0.25
M
0.19 ±
0.06
+ 0.1
0.05
0...8°
3.9 ± 0.1
1
Pin Description
Pad-No.
Pin-No.
(SOP 16)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Symbol
Function
E3Q
A2
A1
AP1
AP2
E1
VCC2
PON
VCC1
OPD
OPU
GND1
KS
SR
CR
CD
AP3
GND3
GND2
Amplifier 3 input
Amplifier 2, non inverting output
Amplifier 2, inverting output
Bias control
Bias control
RF input, antenna
Supply voltage 2, internal band gap
Stand-by and Start / Stop-switch
Supply voltage 1
Output time code, pull-down
Output time code, pull-up
Ground (digital)
Comparator threshold
Clamping control input
AGC time constant
Low pass filter
Capacitor for bias stability
Ground (analog)
Ground (analog)
Block Diagram and Test Circuit
6.8nF
GND1
47nF
GND1
22nF
AP2
AP1
A1
A2
E3Q
AP3
CD
5
4
3
2
1
17
16
GND1
4.7µF
CR
15
14
E1
6
V1
SR
200k
∆V1
V2
-
CONTROL AMPLIFIER
V3
1p
UE1
VCC3
50
VCC1
TFA 2127
GND1
VCC2
100k
7
POWER SUPPLY
11
OPU
10
OPD
COMPARATOR
4.7µF
V3
V2
9
8
18
VCC1
PON
GND 3
V1, V2
19
GND 2
12
13
GND 1
KS
100k
V1
UE1: pot core AL1100 nH/w2 ; 2 x 25 windings with 0.2 CuL
2
09/00
TFA2127
Absolute Maximum Ratings
Parameter
Symbol
min.
max.
Unit
Supply voltage 1
VCC1
0
5.25
V
Supply voltage 2
VCC2
0
5.25
V
Output voltage OPD
VOPD
-0.3
VCC1
V
Output voltage OPU
VOPU
-0.3
5.25
V
Input voltage SR
VSR
0
VCC1
V
Input voltage PON
VPON
0
VCC1
V
Junction temperature
Tj
150
°C
Ambient temperature range
Tamb
+70
°C
-25
Recommended Operational Conditions
Parameter
Symbol
min.
max.
Unit
Supply voltage 1
VCC1
2.2
3.5
V
Supply voltage 2
VCC2
1.2
1.8
V
RF input voltage
ViE1
1
50000
µV
Reception frequency
f
50
80
KHz
09/00
TFA2127
3
Electrical Characteristics
Refering to the test circuit with generator signal
f = 77500 ± 5 Hz
pulse modulation of RF-signal from 100 % to 25 %
during modulation time t = 200 ms,
VCC1 = VCC2 = 1.4 V; VPON = 0 V; Ta = 25 °C,
unless specified otherwise
Parameter
Symbol
min.
typ.
max.
Unit
Supply voltage 1
VCC1
2.2
3.5
5.25
V
Supply voltage 2
VCC2
1.2
1.4
1.8
V
Supply current
(VCC1 = 3.5 V)
(VCC1 = 2.2 V)
ICC11
ICC12
400
400
540
530
690
690
µA
µA
Supply current
ICC2
300
500
640
µA
Supply current stand-by
(VPON = VCC1)
ICC10
0.03
1
µA
Input current stand-by switch
-IPON
14
20
µA
Input current on SR
-ISR
0.3
2
µA
Output pulse duration (OPU) 1)
ViE1 = 3 µV, 10 mV
tOL
180
190
220
ms
Output LOW-current (OPU)
ViE1 = 30 µV
IOL
100
200
Output LOW-voltage (OPU)
ViE1 = 30 µV; IOL = 15 µA
VOL
Output HIGH-current (OPD)
ViE1 = 30 µV
-IOH
100
330
µA
Output HIGH-voltage (OPD)
ViE1 = 30 µV; -IOH =15 µA
VOH
1.1
1.3
V
Sensitivity
ViE1
(min. RF input for tOL ≥ 180
1)
4
45
0.8
µA
200
1
mV
µV
ms)1)
Test in a special application circuit without socket.
09/00
TFA2127
Application Circuit With TFA2127 in SOP 16 for DCF-Receiver
OPU
47n
22n
4.7µ
OPD
100k
16
15
14
13
12
11
10
9
TFA 2127
1
2
3
4
5
100k
6
7
8
VS = 1.5 V
77.5 kHz
6.8n
4.7µ
FERRITE
ANTENNA
STAND BY *
100n
* Switch on ground: Start, Power on
Switch open or on VCC: Stop, Stand-by
Application Information
The PCB has to be designed for RF conditions. To achieve a high selectivity the parasitic parallel capacitance of
the X-tal resonator should be 1...1.5 pF.
For a trouble-free reception the capacitors on VCC2 and AP3 have to be arranged nearby the chip food prints.
The dimensioning of the antenna resonant resistance is a compromise between high signal voltage and low
antenna noise voltage.
Q factor of antenna should be high for attenuation of interference signals. In the application circuit is Rres < 100 k;
Q = 80.
Copying is generally permitted, indicating the source. However, our consent must be obtained in all cases. MEGAXESS reserves the
right to make changes in specifications at any time and without notice. The information and suggestions are given without obligation
and cannot give rise to any liability, they do not indicate the availability of the components mentioned. The information included
herein is believed to be accurate and reliable. However, MEGAXESS assumes no responsibility for its use; nor for any infringements
of patents or of other rights of third parties which may result from its use.
Megaxess GmbH Deutschland • POB 1370 • 15236 Frankfurt(Oder) • Germany
Phone +49 335 2005 • FAX +49 335 3251 • Internet http://www. megaxess.de
09/00
TFA2127
5
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