LTC1541 datasheet(8/12 Pages) LINER

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LTC1541/LTC1542

15412fd

AMPOUT (Pin 1): Op Amp Output. The output can swing

from rail-to-rail while driving a capacitive load of up to

1000pF. The output can source and sink 0.7mA (min).

AMPIN– (Pin 2): Inverting Input of Op Amp. The input

common mode ranges from VSS to (VCC – 1.3V). The input

current is typically 10pA at 25

°C.

AMPIN+ (Pin 3): Noninverting Input of Op Amp. The input

common mode ranges from VSS to (VCC – 1.3V). The input

current is typically 10pA at 25

°C.

VSS (Pin 4): Negative Supply or Ground Connection.

COMPIN+ (Pin 5): Noninverting Input of Comparator. The

input common mode ranges from VSS to (VCC – 1.3V). The

input current is typically 10pA at 25

°C.

LTC1542

LTC1541 BD2

–

COMPIN+

COMPIN–

COMPOUT

VCC

COMP

OP AMP

AMPOUT

AMPIN–

AMPIN+

VSS

–

LTC1541

LTC1541 BD

–

COMPIN+

REF

COMPOUT

VCC

COMP

OP AMP

AMPOUT

AMPIN–

AMPIN+

VSS

×1

PI FU CTIO S

BLOCK DIAGRA S

Op Amp Open-Loop Gain and

Phase vs Frequency

FREQUENCY (Hz)

120

100

–20

–40

–45

–90

–135

–180

–225

–270

–315

–360

10k

1541/42 TPC13

100

100k

VCC = 5V

VSS = GND

RLOAD = 100kΩ

PHASE

GAIN

REF (Pin 6) (LTC1541): Reference Output. VREF = 1.2V

±1% over industrial temperature range, and is also con-

nected to inverting comparator input internally. This de-

vice can source up to 2mA and sink up to 20

µA. The output

can drive a bypass capacitor of up to 0.01

µF without

oscillation.

COMPIN– (Pin 6) (LTC1542): Inverting Input of Compara-

tor. The input common mode ranges from VSS to

(VCC – 1.3V). The input current is typically 10pA at 25°C.

COMPOUT (Pin 7): Comparator Output. The output can

source 20mA and sink 5mA.

VCC (Pin 8): Positive Supply, 2.5V ≤ VCC ≤ 12.6V. The supply

bypass capacitors are not required if the supply impedance

is low. For single supply applications, it is a good general

practice to bypass VCC with a 0.1µF capacitor to ground.

TYPICAL PERFOR A CE CHARACTERISTICS

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