LT6105 datasheet(17/28 Pages) AD

17 / 28 page

LT6119-1/LT6119-2

611912f

For more information www.linear.com/LT6119-1

guarantee a valid comparator outputs. The RC value can

be determined with the following equation:

V+

− 0.5V









; t

≥100µS

The RC will need to be chosen based on the supply voltage

of the circuit. Figure 8 can be used to easily determine an

appropriate RC combination for an applications supply

voltage range.

applicaTions inForMaTion

Figure 9. V+ Powered Separately from Load Supply (VBATT)

Figure 8. Minimum Resistance for Three

Typical Capacitor Values

Figure 10. Allowable SENSELO, SENSEHI Voltage Range

SENSEHI

LT6119

ISENSE

RSENSE

V+

V–

V+

RIN

VBATT

SENSELO

OUTA 8

611912 F09

ROUT

VOUT

20.2V

40.2V

2.8V

2.5V

2.7

30 35.5 40

V+ (V)

611912 F10

VALID SENSELO/

SENSEHI RANGE

SENSELO, SENSEHI Range

The difference between VBATT (see Figure 9) and V+, as

well as the maximum value of VSENSE, must be consid-

ered to ensure that the SENSELO pin does not exceed

the range listed in the Electrical Characteristics table. The

SENSELO and SENSEHI pins of the LT6119 can function

from 0.2V above the positive supply to 33V below it. These

operating voltages are limited by internal diode clamps

shown in Figures 1 and 2. On supplies less than 35.5V,

the lower range is limited by V– + 2.5V. This allows the

monitored supply, VBATT, to be separate from the LT6119

positive supply, as shown in Figure 9. Figure 10 shows

the range of operating voltages for the SENSELO and

SENSEHI inputs, for different supply voltage inputs (V+).

SUPPLY VOLTAGE (V)

100

611912 F08

C = 100nF

C = 10nF

C = 1nF

100,000,000

10,000,000

1,000,000

100,000

10,000

1000

Output Filtering

The AC output voltage, VOUT, is simply IOUTA • ZOUT. This

makes filtering straightforward. Any circuit may be used

which generates the required ZOUT to get the desired filter

response. For example, a capacitor in parallel with ROUT

will give a lowpass response. This will reduce noise at the

output, and may also be useful as a charge reservoir to

keep the output steady while driving a switching circuit

such as a MUX or ADC. This output capacitor in parallel

with ROUT will create an output pole at:

f–3dB =

2•

π •ROUT •CL

LT6105 Datasheet(PDF) 17 Page - Analog Devices

LT6105 Datasheet(HTML) 17 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL