ta31275 TOSHIBA Semiconductor CORPORATION, ta31275 Datasheet
ta31275
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ta31275 Summary of contents
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... TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA31275FN, TA31275FNG AM/FM RF/IF Detector IC for Low Power Wireless System The TA31275FN is an RF/IF detector IC for AM/FM radio. The IC incorporates an RF amp, 2-level comparator, and local ×8 circuit Features • RF frequency: 240 to 450 MHz (multiplication is used) 100 to 450 MHz (multiplication is not used) • ...
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... amp input pin. IF amp input pin DEC Used as a bias coupling pin. 8 GND2 GND pin Battery saving pin. Function 2 TA31275FN/ TA31275FNG Internal Equivalent Circuit 70 kΩ 3 245 Ω 4 3 kΩ 40 kΩ ...
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... To use the quick charge circuit, attach a capacitor. 17 GND1 GND pin 1. 18 MIX IN Mixer input pin. Changeover switch for ASK/FSK. 19 AM/FM Hi: AM Lo: FM Function 10 3 TA31275FN/ TA31275FNG Internal Equivalent Circuit 1 kΩ 500 Ω kΩ kΩ 3 kΩ 500 Ω kΩ ...
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... FM/AM LPF output pin. Equivalent circuits are given to help understand design of the external circuits to be connected. They do not accurately represent the internal circuits. Function 500 Ω 5.5 kΩ TA31275FN/ TA31275FNG Internal Equivalent Circuit 20 COMP 100 kΩ DATA 100 kΩ kΩ 22 500 Ω ...
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... When kΩ, the current dissipation is approximately 600 µA. 21 − pin) and V (5 pin) and V CC CC1 H ×8 circuit in operation 14 RF DEC Figure 3 5 TA31275FN/ TA31275FNG After R is connected IF input level Figure 2 (11 pin) (or connect them). CC2 L ×8 circuit halted/through pass 03-01-23 CC ...
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... Frequency set by External circuit can be H/L used as-is. ×8 circuit only in operation L/H L/L All circuits TA31275FN/ TA31275FNG Circuit Status in the IC Circuit Status in the Current Dissipation (at no signal) 5.8 mA (typ.) 3.5 mA (typ.) 2.6 mA (typ (typ.) ...
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... Using AM causes current to flow through the AM/FM pin (pin 19). Ground the AM/FM pin (pin 19) or connect it to the BS pin (pin 9). 0.01 µF 1000 Figure 4 21 RSSI Bit rate filter for AM Figure 6 7 TA31275FN/ TA31275FNG in the following figure 50dBµV 36 kΩ RSSI OUT 03-01-23 ...
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... When the filter constants shown below are used not necessary to set the R constant value. 1200 bps 2400 bps 4800 bps In addition, the current AM bit rate filter can be used as a tertiary filter. If the filter used at a rate other than 1200 bps, please change the filter constant. TA31275FN/ TA31275FNG Quadratic Filter (NRZ C20 0.01 µF 68 kΩ ...
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... Specifying a relatively high cutoff frequency for the bit rate filter enables a low capacitor to be used at the REF pin, therefore making the pulse rise quickly. When AM is used, the internal resistance of RSSI is used. So, take the output resistance into account when specifying a cutoff frequency. TA31275FN/ TA31275FNG Quadratic Filter (NRZ) R9 R10 C20 0.01 µ ...
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... Connect the RF-OUT pin (pin 16) and MIX-IN pin (pin 18) with the shortest possible pattern. (2) Attaining a sufficient gain To attain a sufficient RF amp gain, select an optimum value for the input matching circuit block (pin 13) according to the board circuit pattern. IC Mounting Area Provide a ground pattern under the IC device, and prepare relatively many through holes. TA31275FN/ TA31275FNG 10 03-01-23 ...
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... RSSI R COMP = 500 µ (3) I DATAL DATAL I 1 (4) DATAH V BSH V BSL V LOBSH V LOBSL 11 TA31275FN/ TA31275FNG V Min Typ. Max 2.4 5.0 5.5 240 450 100 450 250.7 439 Min Typ. Max 0 −9.0 −6.0 − ...
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... C IN (MIX) R OUT (MIX) IP3 * (FM mode) Test Symbol Circuit Vi (LIM) IF input = 40dBµVEMF S/ (IF) = 80dBµVEMF S/ (IF) 12 TA31275FN/ TA31275FNG Min Typ. Max 4.3 5.8 7 Min Typ. Max 4.0 5.4 6 Test Condition Typ. 330 31 ...
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... GND2 DEC OUT IN CC1 BPF CC 0.01 µF ( 0.01 µ (4) I DATAH 2 kΩ 3 TA31275FN/ TA31275FNG CHARGE RF RF OUT DEC IN Detector QUAD V BS DATA CC2 DATA ...
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... Test Circuit 3 I cco ( (MIX) 1000 pF 1000 (8) S/N1, 2 0.01 µ 1000 ccqam TA31275FN/ TA31275FNG Buff 03-01-23 ...
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... TA31275FN/ TA31275FNG Quiescent Current Consumption – FM Mode 110°C 25°C −40° 40.7 MHz 100dBµVEMF * No switching pin current is included Supply voltage V ( Amp Conversion Gain – ...
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... TA31275FN/ TA31275FNG RSSI Output Voltage Characteristics (MIX inputs) 110°C 25°C −40° 100 MIX IN input level V (MIX) in (dBµVEMF) S/N Characteristics (IF input) in the AM Mode (IF ...
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... TA31275FN/ TA31275FNG Mixer Conversion Gain Frequency Characteristics −40°C 110° 25°C V (MIX 60dBµ 100dBµV LOBS = “L” (direct input) <Meas point> MIXOUT at spectrum analyzer * Terminated with the IF ...
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... FM Mode 5 6 (V) 18 TA31275FN/ TA31275FNG Demodulation Output – Supply Voltage Characteristics (FM) 110°C 25°C −40°C f (IF 10.7 MHz V (IF 50dBµVEMF Dev = ±20 kHz fmod = 600 Hz <Meas point> FILOUT at audio analyzer Supply voltage V ...
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... TA31275FN/ TA31275FNG Sensitivity Detuning Characteristics (AM and FM modulation) Dev = ±20 k Dev = ± (RF 314.9 MHz fmod = 600 40.7 MHz Dev = ±80 k 100dBµV LOBS = “H” ...
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... TA31275FN/ TA31275FNG Waveform Shaping Output Duty Ratio – Supply Voltage Characteristics (RF 314.9 MHz fmod = 600 40.7 MHz 100dBµV LOBS = “H” No SAW filter <Meas point> DATA at oscilloscope Dev = ± ...
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... TA31275FN/ TA31275FNG S/N and AMR RF Input Characteristics (Dev = ± (RF 314.9 MHz fmod = 600 40.7 MHz 100dBµV LOBS = “H” No SAW filter <Meas point> FILOUT at audio ...
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... OSC IF V MIX DEC LOBS OUT CC1 C107 BPF CC 22 TA31275FN/ TA31275FNG SAW RF IN 1000 pF C13 GND1 RF CHARGE OUT DEC IN Detector QUAD V GND2 BS DATA CC2 ...
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... IF OSC V MIX DEC IN LOBS OUT CC1 C107 BPF 23 TA31275FN/ TA31275FNG SAW RF IN 1000 pF C13 GND1 CHARGE RF RF OUT IN DEC IN Detector GND2 BS QUAD V DATA CC2 ...
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... Package Dimensions Weight: 0.09 g (typ.) TA31275FN/ TA31275FNG 24 03-01-23 ...
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... TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. • The information contained herein is subject to change without notice. TA31275FN/ TA31275FNG 25 000707EBA 03-01-23 ...