ics for mobile communication 1 publication date: october 2002 sdm00005beb AN6105FHN quadrature demodulation ic for cdma system mobile telephone overview the AN6105FHN is a quadrature demodulation ic for a cdma system mobile telephone, incorporating a reception if for is-95 and gca plus quadrature demodu- lator. features ? current consumption: 11 ma typ. ? gain control range: + 85 db to ? 5 db ? high linearity control characteristic: 3 db ? temperature dependency: 3 db applications ? cellular telephone (is-95) qfn016-p-0304a (lead-free package) unit: mm block diagram 3-c 0.50 r0.30 (0.85) 3.00 0.10 2.00 0.10 (0.33) 3.20 0.10 0.80 max. (3.00) (0.42) (4.00) 4.20 0.10 (1.35) (0 .1 5 ) 0.60 0.10 (0.58) (0.55) 0.20 0.06 seating plane 1 4 5 12 9 13 16 8 1 4 5 12 9 13 16 8 0.20 0.10 0.10 0.50 m 0.10 12 11 10 9 8 7 6 5 1 2 3 4 13 14 15 16 gca control gca 1/2 /2 offset adjustment sleep 2nd local i out b.b gnd gain control if in if in x gca v cc gca gnd v ref (i, q) adjustment i-ix adjustment q-qx adjustment ix out q out qx out b.b v cc
AN6105FHN 2 sdm00005beb pin descriptions absolute maximum ratings parameter symbol rating unit supply voltage v cc 4.2 v supply current i cc 24 ma power dissipation * 2 p d 100 mw operating ambient temperature * 1 t opr ? 30 to + 85 c storage temperature * 1 t stg ? 55 to + 125 c recommended operating range parameter symbol range unit supply voltage v cc 2.55 to 4.00 v pin no. description 1 gnd (gca) 2 i, q output operating point adjustment 3 q operating point offset adjustment 4 i operating point offset adjustment 5 q output 6 q output 7 supply voltage (base band) 8 i output pin no. description 9 i output 10 gnd (base band) 11 local signal input 12 sleep 13 gain adjustment 14 supply voltage (gca) 15 signal input ( + ) 16 signal input ( ? ) electrical characteristics at t a = 25 c unless otherwise specified, v cc = 2.8 v, v slp = 2.8 v, v gc = 2.5 v, v lo = ? 10 dbm: f = 223.7 mhz, v in : f = 112.35 mhz, v i , v ix , v q , v qx : f = 500 khz, a measurement in high impedance be made for v i , v ix , v q and v qx . parameter symbol conditions min typ max unit current consumption i tot v in , v lo : no input 6 11 15 ma current consumption (sleep) i slp v in , v lo : no input, v 12 = 0 v ? 010 a conversion gain 1 g c(1) conversion gain between v in and v i 80 85 90 db v gc = 2.5 v, v in = 5 db v conversion gain 2 g c(2) conversion gain between v in and v i ? 18 ? 12 ? 9db v gc = 0.1 v, v in = 85 db v iq maximum output v iq output level of v i , v ix , v q and v qx 1 1.8 ? v[p-p] v gc = 2.5 v, v in = 40 db v noise figure nf v gc = 2.5 v ? 7 8.5 db note) * 1: except for the operating ambient temperature and storage temperature, all ratings are for t a = 25 c. * 2: p d is the value at t a = 85 c without a heatsink. use this device within the range of allowable power dissipation referring to " technical data ? p d ? t a curves of qfn016-p-0304".
AN6105FHN 3 sdm00005beb electrical characteristics at t a = 25 c (continued) unless otherwise specified, v cc = 2.8 v, v slp = 2.8 v, v gc = 2.5 v, v lo = ? 10 dbm: f = 223.7 mhz, v in : f = 112.35 mhz, v i , v ix , v q , v qx : f = 500 khz, a measurement for high impedance be made for v i , v ix , v q and v qx . parameter symbol conditions min typ max unit input ip3 iip3 input ip3 value at 60 db 1 db of 65 69 ? db v conversion gain gain adjustment sensitivity gca gain variation at v gc = 0.5 v to 2.5 v 42 45 48 db/v quadrature demodulation error iq err v gc = 1.5 v, v in = 47 db v ?? 25 ? 20.5 db local signal input level v lo ? 20 ? 10 ? 7dbm sleep control (low) v slp(1) voltage to get i tot of 10 a and less ?? 0.2 v sleep control (high) v slp(2) voltage for an operating mode 2.3 ?? v gain adjustment voltage v gc 0.1 ? 2.6 v iq operating point voltage v iq dc operating point voltage at no 1.2 1.5 1.7 v adjustment for iq output (pin 5, pin 6, pin 8 and pin 9) iq operating point deviation ? v iq dc operating point voltage difference ? 250 0 250 mv between v i -v ix and v q -v qx (at no adjustment) ? design reference data note) the characteristics listed below are theoretical values based on the ic design and are not guaranteed. parameter symbol conditions min typ max unit iq output deviation ? v iq level ratio between iq signals ? 0.8 0 0.8 db (differential), v gc = 1.5 v, v in = 47 db v iq output phase difference ? iq phase difference between iq signals 85 90 95 deg (differential), v gc = 1.5 v, v in = 47 db v terminal equivalent circuits pin no. equivalent ci rcuit description dc voltage (v) 1 gnd (gca): ? ground pin of gca system. 2, 3, 4 pin 2: i, q output operating point adjustment: 1.9 pin to adjust an operating point voltage of iq output (pin 5, pin 6, pin 8 and pin 9).; pin3: q operating point offset adjustment: pin to adjust an offset voltage between q, q output (pin 5, pin 6).; pin 4: i operating point offset adjustment: pin to adjust an offset voltage between i, i output (pin 8, pin 9). 20 k ? 40 k ? 150 k ? 20 k ? 40 k ? pin 2, 3, 4 v cc
AN6105FHN 4 sdm00005beb terminal equivalent circuits (continued) pin no. equivalent ci rcuit description dc voltage (v) 5, 6 pin 5: q output: 1.5 pin to output the q signal.; pin 6: q output: pin to output the q signal. 7 ? supply voltage (base band): 2.8 supply voltage pin of base band system. 8, 9 pin 8: i output: 1.5 pin to output the i signal.; pin 9: i output: pin to output the i signal. 10 ? gnd (base band): ? ground pin of base band system. 11 local signal input: 2.7 input pin of local signal for iq de modu- lation. 12 sleep: ? operating mode: connect this pin to supply voltage pin. sleep mode: connect to gnd. v cc pin 5, 6 v cc pin 8, 9 2 k ? 11 v cc 150 k ? 12
AN6105FHN 5 sdm00005beb terminal equivalent circuits (continued) pin no. equivalent ci rcuit description dc voltage (v) 13 gain adjustment: 0 adjusts gain. possible to apply voltage from 0 to a supply voltage. 14 ? supply voltage (gca): ? supply voltage pin of gca system. 15, 16 pin 15: signal input ( + ): 1.2 pin to input if signal. impedance matching is required.; pin 16: signal input ( ? ): ac grounding with a capacitor. technical data ? p d ? t a curves of qfn016-p-0304a p d ? t a power dissipation p d (w) 0.000 0 25 50 75 100 125 ambient temperature t a ( c) 0.600 0.584 0.500 0.400 0.300 0.200 0.251 0.100 mounted on standard board (glass epoxy: 50 mm 50 mm t 0.8 mm) r th(j-a) = 171.2 c/w independent ic without a heat shink r th(j-a) = 397.4 c/w usage note there are two systems of a supply voltage pin for this device. (pin 7, pin 14) apply the same voltage simultaneously to these two pins on use. (keep either of them from being off.) v cc 64 k ? 56 k ? 13 v cc 2 k ? 2 k ? 1.2 v 16 15
AN6105FHN 6 sdm00005beb application circuit example 12 11 10 9 8 7 6 5 1 2 3 4 13 14 15 16 gca control gca 1/2 /2 offset adjustment sleep 2nd local i out b.b gnd gain control if in if in x gca v cc gca gnd v ref (i, q) adjustment i-ix adjustment q-qx adjustment ix out q out qx out b.b v cc
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