RO2156D RO2156D-1 RO2156D-2 ® • • • • Ideal for European 868.95 MHz Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) Pb The RO2156D is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 868.95 MHz. This SAW is designed specifically for remote-control and wireless security transmitters operating under ETSI-ETS 300 220 in Europe and under FTZ 17 TR 2100 in Germany. 868.95 MHz SAW Resonator Absolute Maximum Ratings Rating Value Units Input Power Level 10 dBm DC Voltage 12 VDC -40 to +85 °C 260 °C Storage Temperature Soldering Temperature (10 seconds / 5 cycles max.) SM3838-6 Case 3.8 X 3.8 Electrical Characteristics Characteristic Sym Frequency at +25°C Nominal Frequency Notes RO2156D fC RO2156D-1 2,3,4,5 RO2156D-2 Tolerance from 868.95 MHz Minimum Typical 869.025 868.875 869.175 868.850 869.050 -75 +225 RO2156D RO2156D-2 Frequency Aging Unloaded Q IL QU 50 Ω Loaded Q QL Turnover Temperature TO Turnover Frequency fO Frequency Temperature Coefficient FTC Absolute Value during the First Year |fA| 2,5,6 5,6,7 kHz 10 6,7,8 RM Motional Inductance LM Motional Capacitance CM Shunt Static Capacitance CO 2.0 25 fC 40 0.032 1 5 Motional Resistance 1.1 dB 20,000 2,400 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model MHz ±100 Insertion Loss Temperature Stability Units ±75 ∆fC RO2156D-1 Quality Factor Maximum 868.875 <±10 1.0 5, 6, 7, 9 5, 6, 7, 9 Lid Symbolization (in Addition to Lot and/ or Date Code) °C kHz ppm/°C2 ppm/yr MΩ 15 Ω 50 µH 0.7 fF 2.3 pF 433 / YWWD Standard Reel Quanitity 3000 Pieces / Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. Lifetime (10 year) frequency aging. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25°C±2°C for all specifications. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. 8. 9. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. Turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fO. The nominal frequency at any case temperature, TC, may be calculated from: f = fO [1 - FTC (TO -TC)2]. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance CO is the static (nonmotional) capacitance between the two terminals measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with “NC” pads unconnected. Case parasitic capacitance is approximately 0.05pF. Transducer parallel capacitance can be calculated as: CP ≈ CΟ − 0.05 pF. E-mail: [email protected] Page 1 of 2 http://www.rfm.com RO2156D_RO2156D-1_RO2156D-2 _090503 868.95 MHz SAW Resonator Electrical Connections The SAW resonator is bidirectional and may be installed with either orientation. The two terminals are interchangeable and unnumbered. The callout NC indicates no internal connection. The NC pads assist with mechanical positioning and stability. External grounding of the NC pads is recommended to help reduce parasitic capacitance in the circuit. Pin Connection 1 NC 2 Terminal 3 NC 4 NC 5 Terminal 6 NC Power Test 50 Ω Source at F C P INCIDENT Low-Loss Matching Network to 50 Ω P REFLECTED 1 6 2 3 5 4 Typical Application Circuits B C G H Typical Low-Power Transmitter Application 200k Ω 6 1 6 A 2 5 3 4 E 5 2 4 3 +9VDC Modulation Input 1 C1 (Antenna) 1 6 D 47 L1 I 2 3 5 4 J C2 ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application Case Dimensions Dimension A B C D E G H I J Min 3.60 3.60 1.00 0.95 2.39 0.90 1.90 0.50 1.70 Output 200k Ω +VDC mm Nom 3.80 3.80 1.20 1.10 2.54 1.0 2.0 0.6 1.8 Max 4.0 4.0 1.40 1.25 2.69 1.10 2.10 0.70 1.90 Min 0.14 0.14 0.04 0.037 0.090 0.035 0.75 0.020 0.067 Inches Nom 0.15 0.15 0.05 0.043 0.10 0.04 0.08 0.024 0.07 C1 +VDC L1 Max 0.16 0.16 0.055 0.05 0.110 0.043 0.83 0.028 0.075 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass Equivalent LC Model 0.05 pF* Typical Test Circuit Co = Cp + 0.05 pF Cp The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Electrical Test Rm Lm *Case Parasitics Cm Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. fC = f O , T C = T O 0 6 1 5 2 4 3 To 50 Ω Network Analyzer -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) From 50 Ω Network Analyzer 0 -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 ∆T = TC - T O ( °C ) RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] Page 2 of 2 http://www.rfm.com RO2156D_RO2156D-1_RO2156D-2 _090503