AN6494NSA Digital Communication Orthogonal Modulator IC ■ Overview Unit : mm The AN6494NSA is an orthogonal modulator IC for digital cellular telephones. It incorporates a phase shifter and an APC circuit for indirect modulation in the 1.5GHz band. It efficiently prevents power from leaking to adjacent channels. When provided with an LC filter, it can efficiently suppress IF-band local harmonic spurious. 5.00±0.20 1 0 —10˚ 8 1.20±0.2 • Operating supply voltage range : 2.7V to 4.0V • 1.5GHz indirect modulation • LO1’s eighth-order harmonic suppression : –65dBc or better • Output power level : –13dBm • Variable range : APC = typ. 38dB (at fout=1.5GHz) • Phase shifter frequency : 178MHz • Package : SSOP016-P-0225A with 0.65mm pitch 0.65 0.50±0.20 0.10±0.10 0.22 +0.10 –0.05 (0.225) + 0.10 ■ Features (1.0) 0.15 – 0.05 4.40±0.20 9 6.40±0.30 16 SEATING PLANE SEATING PLANE SOP package with 16 pins (SSOP016-P-0225A) ■ Block Diagram L02 PO 16 15 VAPC 14 13 12 11 10 9 6 7 8 NC M LPF 1 2 3 4 5 Q Q I I + L01 VCC ■ Pin Descriptions Pin No. Description Pin No. Description 1 VCC (mod) 9 LO2R 2 Q input 10 LO2 3 Q input 11 APC/BS 4 I input 12 LC2 5 I input 13 NC 6 LC1 14 GND 7 LO1 15 RFoutput 8 GND 16 VCC (UP–MIX) ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating Unit Supply voltage VCC 4.2 V Supply current ICC 60 mA Power dissipation PD 252 (Ta=80˚C) mW Operating ambient temperature Topr –30 to + 80 ˚C Storage temperature Tstg –55 to + 125 ˚C ■ Recommended Operating Range Parameter Operating supply voltage range Symbol Range VCC 2.7V to 4.0V ■ Electrical Characteristics (Ta=25±2˚C) Parameter Symbol Output level (1) PO1 Output level (2) PO2 Current consumption ICC Sleep current ISL Minimum output level Pmin Condition LO1=178MHz, –20dBm LO2=1607MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1631MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=0V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=1.0V Note) VCC=3.7V IQ signal : 0.5VP–P (single phase), π/4 QPSK modulated PO1 output frequency : 1428.0025MHz PO2 output frequency : 1453.0025MHz Pmin output frequency : 1441.0025MHz min typ max Unit –16 –13 –10 dBm –16 –13 –10 dBm 38 48 mA 0 10 µA –52 –45 dBm ■ Electrical Characteristics (Design Values for Reference) (Ta=25±2˚C) The following are design values for reference only (not guaranteed). Parameter Symbol Carrier leak suppression (fLO2–fLO1) *1 CL Image leak suppression *1 IL Adjacent spurious suppression *1 DU Base-band distortion suppression *1 BD 3rd intermodulation distortion suppression *2 (Po = –10dBm) IM3 Adjacent channel power leak suppression (50kHz separation) *3 BL1 Adjacent channel power leak suppression (100 kHz separation) *3 BL2 APC variation range *1 LAPC APC output level control sensitivity *1 SAPC In-band output level deviation *1 ∆P Direct conversion modulation current consumption *1 IMD Up-mixer current consumption * IUM Condition LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V, IQ: VDC offset adjust LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V, IQ: VAC level adjust LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=1.0 —2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=1.0 —2.5V LO1=178MHz, –20dBm Lo2=1607MHz—1631MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V LO1=178MHz, –20dBm LO2=1619MHz, –25dBm VAPC=2.5V Note) VCC= 3.7V IQsignal : 0.5VP–P (single phase), 1.85VDC *1 : π/4 QPSK modulation *2 : 3π/4 QPSK modulation *3 : PN9-stage modulation APC output level sensitivity was measured with VAPC=1.0V and VAPC=1.6V. ■ Usage Note Surge breakdown levels The following are design values for reference only (not guaranteed). Condition : C=200pF, and R=0Ω Pin No. Positive breakdown level (V) Negative breakdown level (V) 2 90 60 3 90 50 4 70 60 5 80 70 11 80 70 12 170 — min 30 typ max Unit –35 –30 dBc –40 –35 dBc –70 –65 dBc –40 dBc –35 dBc –60 dBc –65 dBc 38 dB 47 dB/V –1.5 +1.5 dB 17 22 mA 21 26 mA ■ Pin Descriptions Pin No. 1 Symbol VCC I/O Description I This is the supply voltage pin for the direct conversion modulator. The IC incorporates a band-gap regulator to provide a regulated bias independent of VCC or temperature change. Equivalent circuit I signal input. The relationship between input DC bias and amplitude is as follows : 2 I I DC bias (V) 1.7— (VCC– 0.9) Amplitude VP–P 0.5 (single phase) Input impedance is 100kΩ or more. 3 I I 1 2 Inverted-I signal input. Apply 1.5— (VCC – 0.9) V for single-phase input mode. Q signal input. The relationship between input DC bias and amplitude is as follows : 4 Q I 3 2kΩ DC bias (V) Amplitude VP–P 1.7— (VCC– 0.9) 0.5 (single phase) 1 Input impedance is 100kΩ or more. 4 5 Q I 5 2kΩ Inverted-Q signal input. Apply 1.5— (VCC– 0.9)V for single-phase input mode. External 6 LC1 An external LC connected to this pin removes spurious from the transmission band by raising up the Lo1 input frequency band. The output is an emitter follower. 6 12 ■ Pin Descriptions (cont.) Pin No. Symbol I/O Description Equivalent circuit 1 10kΩ 7 Lo1 I This is the local input to the orthogonal modulator. The input impedance is 10kΩ. 6 340Ω 2pF 2pF 2pF 5pF 340Ω 2pF 8 GND 9 Lo2 REF This is the ground for the orthogonal modulator. The ground foil pattern for this pin must be wide enough to provide a low impedance. I This is a local input to the UP mixer. An external balance coil should be used to provide balanced input. 16 7kΩ 1kΩ 1kΩ 10 Lo2 I This is a local input to the UP mixer. An external balance coil should be used to provide balanced input. 10 This is the battery save control for all circuits. It also controls RF output power. 11 APC/BS I VAPC (V) Status 0 — 0.5 OFF 1.0 —VCC ON (APC control) 5pF 5pF 9 Regulator 10kΩ 3kΩ 11 10kΩ (APC control) The input impedance is 5kΩ or more. External 12 LC2 An external LC connected to this pin removes spurious from the transmission band by raising up the Lo1 input frequency band. The output is an emitter follower. 6 12 ■ Pin Descriptions (cont.) Pin No. 13 Symbol Description I/O Equivalent circuit NC This is the ground for the UP mixer and the output amplifier. The ground foil pattern for this pin must be wide enough to provide a low impedance for high frequencies. GND 14 16 200Ω RF output 15 16 VCC O This is the RF output from the output amplifier circuit (emitter follower). I This is the power supply for the UP mixer and the output amplifier circuit. It incorporates a regulating circuit to provide a regulated bias independent of VCC or temperature change. APC Control Voltage Characteristics VCC=3.0V LO1=178MHZ, –20dBm LO2=1619MHZ, –25dBm IQ signal : 0.5Vp-p (single phase) –10 –20 (T= 80˚C) (T= 27˚C) PO (T= –30˚C) –30 –40 IL –50 –60 BL1 –70 BL2 –80 –50 –60 Circuit OFF –70 DU –80 0 1 2 APC Control Voltage (V) 3 Nearby Spurious Suppression (dBc) Output Level (dBm) /Image Leak Suppression (dBc) Adjacent Channel Leak Power Suppression (50kHz Separation) (dBc) Adjacent Channel Leak Power Suppression (100kHz Separation) (dBc) ■ Characteristics Curve 200Ω 15