T4258-ILQ Atmel, T4258-ILQ Datasheet
T4258-ILQ
Specifications of T4258-ILQ
Related parts for T4258-ILQ
T4258-ILQ Summary of contents
Page 1
... V57 VS GND FMAGC Ordering Information Extended Type Number T4258-ILQ T4258-ILS Rev. A1, 10-Jan-01 can be built together with the PLL U4256BM. This ICs are designed for high performance car radio applications. Electrostatic sensitive device. Observe precautions for handling. D Soft mute and multipath noise cancellation ...
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... T4258 Pin Description Pin Symbol Function 1 MX1FMA 1st mixer FM input A 2 MX1FMB 1st mixer FM input B 3 MX1AMB 1st mixer AM input B 4 GNDMX Ground 1st mixer 5 FMAGC FM preamplifier AGC 6 AMVREG AM control voltage 7 AMAGC AM preamplifier AGC 8 AMPLPF AM AGC LP filter 9 METER Fieldstrength output 10 ADJAC ...
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... Symbol R thJA = +8 + amb = 0.4 kHz 0.3, f MOD Test Conditions / Pins Symbol Pin Pin Pin Pins 43 IP3 Pin 41 T4258 Value Unit 10 V 1,0 W 150 C –40 to +85 C –50 to +150 C Min. Typ. Max. Unit 8 8.5 10 –40 85 Value Unit t.b.d. K/W = 450 kHz, reference point Pin 4 IF Min ...
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... T4258 Electrical Characteristics (continued) Test conditions (unless otherwise specified MHz for AC parameters Parameter AM-1st IF Amplifier (10.7 MHz) Input resistance IF preamplifier gain R L Preamplifier control range Output intercept point 3rd order Noise figure Mixer 2 (450 kHz) DC supply current Conversion conductance io /vi if2 ...
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... Vmix- out Vif1out g c IP3 = 200 NF dsb Pin Pin Pin Pin Pin Pin Pins 43 43 min G max Pin Pin TK1 TK2 F IP3 T4258 = 100 MHz, RF Min. Typ. Max. Unit 103 dB V t.b. t.b. mA/V 125 330 330 dB/K dB/K t.b.d. dB 130 ...
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... T4258 Electrical Characteristics (continued) Test conditions (unless otherwise specified 0.4 kHz kHz, f MOD Parameter FM Demodulator (Pin 11) Output voltage V iPin 23 450 kHz Deviation = f MOD Signal-to-noise related to Bandwidth = kHz 22.5 kHz dev. Deemphasis 50 s Total distortion Bandwidth 2nd IF filter = 120 kHz WB Demodulator (Pin 11) ...
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... Hold time DA Bus Timing t R Enable Data Clock Rev. A1, 10-Jan-01 Test Conditions / Pins Symbol Pins 17, 18 BUS V BUS HEN t HDA t HDA Figure 3. Bus timing T4258 Min. Typ. Max. Unit 2.0 V 1.0 V 1.0 MHz 250 ns 250 ns 400 ns 100 ns 100 ns 250 HEN 11826 7 (17) ...
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... T4258 Data Transfer A24_100 MSB BYTE3 LSB MSB ADDR. Demodulator Gain FM – Pin21 IF1 INT stop B93 B92 B91 B90 B89 B88 A24_101 MSB BYTE3 LSB MSB ADDR. WB demodu- Soft mute Soft lator gain threshold mute depth 26dB B72 B71 B70 ...
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... Bits select the the search-stop deviation from the center frequency ans AM noiseblanker sensitivity AM Noise- blanker Bit 89 Sensitivity 0 0 Low Normal High T4258 LSB BYTE 3 MSB Bit Search- Bit 87 Bit 86 stop window + 0.5 kHz 0 0 1.1 kHz 0 0 2.3 kHz 0 1 4.8 kHz kHz ...
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... T4258 In AM mode (Bits 92, 93), Bits set the divide factor of the AM divider Divider Bit Bit Bit AM Mixer Divide Divide Divide Divide Divide Divide Divide Divide Divide mode and in weather band mode (Bit 92, 93), the Bits set the multipath sensitivity Sensitivity Bit ...
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... Bit 64 Bit 62 – 31.25 kHz – 37.50 kHz 0 1 – 43.75 kHz 1 1 T4258 Bit 61 Bit Bit Bit Bit 59 Bit 58 Bit 57 Bit ...
Page 12
... T4258 Function of Pin 20 setting is done by Bit 55 Pin 20: IF out / Field Strength for Multipath 2nd IF output Multipath field strength Band filter mode 2nd IF Filter Internal filter External + internal filter Setting Bit 53 controls the demodulator in FM/ WB mode. Demodulator Control FM fine tuning OFF (default) WB fine tuning Setting Bit 52 controls the gain of the local oscillator ...
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... Bit 9 IF Bandwidth 0 200 kHz 1 190 kHz 180 kHz 170 kHz 160 kHz Bit 8 150 kHz 140 kHz 0 130 kHz 1 120 kHz 110 kHz 100 kHz 90 kHz Bit 7 80 kHz 0 70 kHz 1 60 kHz 50 kHz T4258 Bit Bit Bit 3 Bit 2 Bit 1 Bit ...
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... T4258 Test Circuit 14 (17) Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï ...
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... Application Board Schematic Rev. A1, 10-Jan-01 Figure 6. Application board schematic T4258 15 (17) ...
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... T4258 Package Dimensions Package SSO44 Dimensions in mm 18.05 17.80 0.3 0.8 16 (17) 9.15 8.65 7.50 7.30 2.35 0.25 0.10 10.50 10.20 23 technical drawings according to DIN specifications 22 Rev. A1, 10-Jan-01 0.25 ...
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... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A1, 10-Jan-01 T4258 http://www.atmel–wm.com 17 (17) ...