Datasheet LTC1540 (Analog Devices) - 10
| Fabricante | Analog Devices |
| Descripción | Nanopower Comparator with Reference |
| Páginas / Página | 14 / 10 — TYPICAL APPLICATIONS Low-Battery Detect. Figure 9. Low-Battery Detect … |
| Formato / tamaño de archivo | PDF / 209 Kb |
| Idioma del documento | Inglés |
TYPICAL APPLICATIONS Low-Battery Detect. Figure 9. Low-Battery Detect Works Down to 1.6V
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LTC1540
TYPICAL APPLICATIONS Low-Battery Detect
Figure 9 shows how to use the LTC1540 for a low-battery down to a supply voltage of 2V, but it is still functional with detect, drawing only 1.4µA at VBAT = 2V. The circuit is pow- the supply as low as 1.6V. Some parameters, such as VREF ered by a 2-cell NiCd battery. The VBAT pin could be as low and VOS, will be degraded on lower supply voltages. The as 1.6V when the batteries are completely depleted. The input voltage range extends from 0.9V below the positive electrical specifications of the LTC1540 guarantee operation supply to the negative supply. VBAT = ~1.6V TO 2.5V 7 2-CELL R1 NiCd 3M V+ LTC1540 3 IN+ + R2 OUT 8 LBO 1.1M 4 IN– – 6 REF R3 40k 5 HYST R4 1.2M V– GND 2 1 R5 1M 1540 F09
Figure 9. Low-Battery Detect Works Down to 1.6V
1540fb 10 For more information www.linear.com/LTC1540
TYPICAL APPLICATIONS Low-Battery Detect
Figure 9 shows how to use the LTC1540 for a low-battery down to a supply voltage of 2V, but it is still functional with detect, drawing only 1.4µA at VBAT = 2V. The circuit is pow- the supply as low as 1.6V. Some parameters, such as VREF ered by a 2-cell NiCd battery. The VBAT pin could be as low and VOS, will be degraded on lower supply voltages. The as 1.6V when the batteries are completely depleted. The input voltage range extends from 0.9V below the positive electrical specifications of the LTC1540 guarantee operation supply to the negative supply. VBAT = ~1.6V TO 2.5V 7 2-CELL R1 NiCd 3M V+ LTC1540 3 IN+ + R2 OUT 8 LBO 1.1M 4 IN– – 6 REF R3 40k 5 HYST R4 1.2M V– GND 2 1 R5 1M 1540 F09
Figure 9. Low-Battery Detect Works Down to 1.6V
1540fb 10 For more information www.linear.com/LTC1540