ST7MC1K2-Auto datasheet(346/371 Pages) STMICROELECTRONICS

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12.13

Operational amplifier characteristics

Subject to general operating conditions for fOSC, and TA unless otherwise specified.

(TA = -40 to +125

oC, V

DD -VSSA = 4.5 to 5.5V unless otherwise specified)

Table 219.

Operational amplifier characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Resistive load (max 500µA @ 5V)

Ω

Capacitive load at VOUT pin

150

VCMIR

Common mode input range

VSSA

VDD/2

Vio

Input offset voltage

( + or - )(1)

After calibration, VIC =1V

2.5

10(2)

∆V

Input offset voltage drift from the

calibrated voltage, temperature

conditions

With respect to temperature

8.5(3)

µV/oC

With respect to common mode

input

1(3)

mV/V

With respect to supply

3.1(3)

CMR

Common mode rejection ratio

HIGHGAIN = 0 @ 100 kHz

SVR

Supply voltage rejection ratio

@ 100 kHz

50(4)

Avd

Voltage gain

RL = 10kΩ

(1.5)(4)

V/mV

VSAT_OH

High level output saturation

voltage (VDD -VOUT)

RL = 10kΩ

90(4)

VSAT_OL

Low level output saturation

voltage

GBP

Gain bandwidth product

HIGHGAIN = 0

2(4)

46(4)

MHz

HIGHGAIN = 1

7(4)

15(4)

SR+

Slew rate while rising

HIGHGAIN = 0

(AVCL =1, RL = 10kΩ,

CL = 150pF, Vi = 1.75V to 2.75V)

(5)

1(4)

V/µs

SR-

Slew rate while falling

HIGHGAIN = 0

(AVCL =1, RL = 10kΩ,

CL = 150pF, Vi = 1.75V to 2.75V)

(5)

2.5(4)

7.5

Φm

Phase margin

HIGHGAIN = 0

degrees

HIGHGAIN = 1

Twakeup

Wake-up time for the op-amp

from off state

0.8(6)

1.6(6)

µs

After offset compensation has been performed.

The amplifier accuracy is dependent on the environment. The offset value is given for a measurement done with all digital

I/Os stable. Negative injection current on the I/Os close to the inputs may reduce the accuracy. In particular care must be

taken to avoid switching on I/Os close to the inputs when the op-amp is in use. This phenomenon is even more critical when

a big external serial resistor is added on the inputs.

The data are provided from simulations (not tested in production) to guide the user when re-calibration is needed.

Data based on characterization results, not tested in production.

AVCL = closed loop gain.

The data are provided from simulations (not tested in production).

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