Low-power amplifier APA4800 / APA480Anpec APA4800/APA4801 is produced by SO-8 or DIP-8 Plastic Class A and B stereo audio amplifier IC, mainly used in portable digital audio, PC microphone and amplifier, and so on.
APA4800 drive with the stereo 290 mW, 8 Ω audio amplifier circuit as shown in Figure 1.
APA4800 built-in amplifier A and B, with its terminal phase (1 NA +, 1NB +) connected together and put 1 / 2 VDD reference voltage (VRFE). Power supply voltage range of 3 ~ 7 V, no-load supply current to 205 mA (VDD = 5V). Two input VINA, VINB the CiA, RiA and CiB, RiB separately applied to the amplifier A and B RP-INA-input and INB-, feet and two feet of output respectively by the COA and capacitive coupling COB RLA applied to the load and RLB. Link IC feet and legs and feet and ⑥ ⑦ feet of the CCA, RCA, and CCB, RCB A and B respectively, the frequency compensation components. Signal to noise ratio (S / N) of 100 dB, total harmonic distortion plus noise and signal ratio [(THD + N) / S] is 0.15% (typical) slew rate to 5 V / μ s, power supply ripple suppression Than (PSRR) of 55 dB, working temperature range of -40 ~ +85 ℃.
APA4801 used as a driver of 280 mW, 8 Ω stereo audio amplifier circuit shown in Figure 2.
APA4800 compared with, APA4801 integrated resistor divider, eliminating the external resistance. At the same time, APA4801 also has excellent noise-free adjustment of the function, and flexible regulation and noise-free switching Kata without sound. IC's Mute feet (feet) function is to control the importation of chips disability (disable). When Mute feet for the "H", the speaker movements for the "L", so that voices continue to weaken (Mute on). IC in the VDD = 5V and contained no power under the current IDD = 2.5mA, the standby current is only 150 μ A, Mute pin input voltage to 0.8 V, no noise attenuation adjustment (ATT) to 75 dB, (THD + N) S = 0. 1%, S / N = 100dB, slew rate to 5 V / μ s. In 10% (THD + N) into 8 Ω load on the output power of 280 mW; When RL = 16 Ω, the output power is 160 mW. Power supply ripple suppression (PSRR) = 76dB.
Amplifier input capacitance (CiA, CiB) circuit of the numerical impact of the low-frequency performance. If Ci and IC 130 k Ω resistance in the form of high-pass filter (HPF) inflection point for the frequency fc, while Ci = 1 / (2 π × 130k Ω × fC). In this circuit, Ci optional 1 μ F of the Ceramic capacitor.
APA4800 drive with the stereo 290 mW, 8 Ω audio amplifier circuit as shown in Figure 1.
APA4800 built-in amplifier A and B, with its terminal phase (1 NA +, 1NB +) connected together and put 1 / 2 VDD reference voltage (VRFE). Power supply voltage range of 3 ~ 7 V, no-load supply current to 205 mA (VDD = 5V). Two input VINA, VINB the CiA, RiA and CiB, RiB separately applied to the amplifier A and B RP-INA-input and INB-, feet and two feet of output respectively by the COA and capacitive coupling COB RLA applied to the load and RLB. Link IC feet and legs and feet and ⑥ ⑦ feet of the CCA, RCA, and CCB, RCB A and B respectively, the frequency compensation components. Signal to noise ratio (S / N) of 100 dB, total harmonic distortion plus noise and signal ratio [(THD + N) / S] is 0.15% (typical) slew rate to 5 V / μ s, power supply ripple suppression Than (PSRR) of 55 dB, working temperature range of -40 ~ +85 ℃.
APA4801 used as a driver of 280 mW, 8 Ω stereo audio amplifier circuit shown in Figure 2.
APA4800 compared with, APA4801 integrated resistor divider, eliminating the external resistance. At the same time, APA4801 also has excellent noise-free adjustment of the function, and flexible regulation and noise-free switching Kata without sound. IC's Mute feet (feet) function is to control the importation of chips disability (disable). When Mute feet for the "H", the speaker movements for the "L", so that voices continue to weaken (Mute on). IC in the VDD = 5V and contained no power under the current IDD = 2.5mA, the standby current is only 150 μ A, Mute pin input voltage to 0.8 V, no noise attenuation adjustment (ATT) to 75 dB, (THD + N) S = 0. 1%, S / N = 100dB, slew rate to 5 V / μ s. In 10% (THD + N) into 8 Ω load on the output power of 280 mW; When RL = 16 Ω, the output power is 160 mW. Power supply ripple suppression (PSRR) = 76dB.
Amplifier input capacitance (CiA, CiB) circuit of the numerical impact of the low-frequency performance. If Ci and IC 130 k Ω resistance in the form of high-pass filter (HPF) inflection point for the frequency fc, while Ci = 1 / (2 π × 130k Ω × fC). In this circuit, Ci optional 1 μ F of the Ceramic capacitor.
