1FEATURES

2• (Typical, VS = 2.2V)

• Output Swing to Within 30 mV of Supply Rail

• High Voltage Gain 103 dB

• Gain Bandwidth Product 9.5 KHz

• Ensured for: 2.2V, 5V, 10V

• Low Supply Current 0.95 μA/Amplifier

• Input Voltage Range −0.3V to V+ -0.9V

• 2.1 μW/Amplifier Power Consumption

• Stable for AV ≥ +2 or AV ≤ −1

APPLICATIONS

• Portable Instruments

• Smoke/Gas/CO/Fire Detectors

• Pagers/Cell Phones end•

Instrumentation

• Thermostats

• Occupancy Sensors

• Cameras

• Active Badges

DESCRIPTION

The LMC6442 is ideal for battery powered systems,

where very low supply current (less than one

microamp per amplifier) and Rail-to-Rail output swing

is required. It is characterized for 2.2V to 10V

operation, and at 2.2V supply, the LMC6442 is ideal

for single (Li-Ion) or two cell (NiCad or alkaline) battery systems.

The LMC6442 is designed for battery powered

systems that require long service life through low

supply current, such as smoke and gas detectors,

and pager or personal communications systems.

Operation from single supply is enhanced by the wide

common mode input voltage range which includes the

ground (or negative supply) for ground sensing

applications. Very low (5 fA, typical) input bias current

and near constant supply current over supply voltage

enhance the LMC6442's performance near the end•

of-life battery voltage.

Designed for closed loop gains of greater than plus

two (or minus one), the amplifier has typically 9.5

KHz GBWP (Gain Bandwidth Product). Unity gain can

be used with a simple compensation circuit, which

also allows capacitive loads of up to 300 pF to be

driven, as described in the Application Information

section.