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TP1561A/ TP1561NA/TP1562A/TP1564A

Stable 6MHz, 500μA, RRIO, Precision Op Amps

Rev. B.03

www.3peakic.com.cn

Pin Functions

–IN: Inverting Input of the Amplifier. Voltage range

of this pin can go from V

+IN: Non-Inverting Input of Amplifier. This pin has

the same voltage range as –IN.

from 2.1V to 6V. Split supplies are possible as long

as the voltage between V+ and V– is between 2.1V

and 6V. A bypass capacitor of 0.1μF as close to the

part as possible should be used between power

supply pins or between supply pins and ground.

N/C: No Connection.

ground. It can also be tied to a voltage other than

ground as long as the voltage between V

from 2.1V to 6V. If it is not connected to ground,

bypass it with a capacitor of 0.1μF as close to the

part as possible.

SHDN: Active Low Shutdown. Shutdown threshold

is 1.0V above negative supply rail. If unconnected,

the amplifier is automatically enabled.

OUT: Amplifier Output. The voltage range extends

to within millivolts of each supply rail.

Operation

The TP156xA family input signal range extends

beyond the negative and positive power supplies.

The output can even extend all the way to the

negative supply. The input stage is comprised of

two CMOS differential amplifiers, a PMOS stage

and NMOS stage that are active over different

ranges of common mode input voltage. The

Class-AB control buffer and output bias stage uses

a proprietary compensation technique to take full

advantage of the process technology to drive very

high capacitive loads. This is evident from the

transient over shoot measurement plots in the

Typical Performance Characteristics.

Applications Information

Low Supply Voltage and Low Power Consumption

The TP156xA family of operational amplifiers can operate with power supply voltages from 2.1 V to 6.0 V. Each

amplifier draws only 500 μA quiescent current. The low supply voltage capability and low supply current are ideal

for portable applications demanding high capacitive load driving capability and stable wide bandwidth. The

TP156xA family is optimized for wide bandwidth low power applications. They have an industry leading high

GBWP to power ratio and are unity gain stable for any capacitive load. When the load capacitance increases, the

increased capacitance at the output pushed the non-dominant pole to lower frequency in the open loop frequency

response, lowering the phase and gain margin. Higher gain configurations tend to have better capacitive drive

capability than lower gain configurations due to lower closed loop bandwidth and hence higher phase margin.

Low Input Referred Noise

of 0.1 Hz to 10 Hz.

Low Input Offset Voltage

The TP156xA family has a low offset voltage of 400 μV maximum which is essential for precision applications.

The offset voltage is trimmed with a proprietary trim algorithm to ensure low offset voltage for precision signal

processing requirement.

Low Input Bias Current

The TP156xA family is a CMOS OPA family and features very low input bias current in pA range. The low input

bias current allows the amplifiers to be used in applications with high resistance sources. Care must be taken to

minimize PCB Surface Leakage. See below section on “PCB Surface Leakage” for more details.

PCB Surface Leakage