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