ST7MC1 datasheet(279/308 Pages) STMICROELECTRONICS

279 / 308 page

ST7MC1/ST7MC2

279/308

12.13 OPERATIONAL AMPLIFIER CHARACTERISTICS

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

(TA = -40..+125

oC, V

DD-VSSA = 4.5..5.5V unless otherwise specified

Note:

1. AVCL = closed loop gain

2. Data based on characterization results, not tested in production.

3. after offset compensation has been performed.

4. 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 opamp is in use. This phenomenon is even more

critical when a big external serial resistor is added on the inputs.

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

6. The Data provided from simulations (not tested in production).

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Resistive Load (max 500uA @ 5V)

Ω

Capacitive Load at VOUT pin

150

VCMIR

Common Mode Input Range

VSSA

VDD/2

Vio

Input Offset Voltage ( + or - ) 3)

After calibration, VIC =1V

2.5

10 4)

∆V

Input Offset Voltage Drift from the

calibrated Voltage, temperature

conditions

with respect to tempera-

ture

8.5 5)

µV/oC

with respect to common

mode input

1 5)

mV/V

with respect to supply

3.1 5)

mV/V

CMR

Common Mode Rejection Ratio

HIGHGAIN=0 @ 100kHz

SVR

Supply Voltage Rejection Ratio

@ 100kHz

502)

Avd

Voltage Gain

RL=10kΩ

(1.5)2)

V/mV

VSAT_OH

High Level Output Saturation Volt-

age (VDD-VOUT)

RL=10kΩ

90 2)

VSAT_OL

Low Level Output Saturation Volt-

age

RL=10kΩ

90 2)

GBP

Gain Bandwidth Product

HIGHGAIN=0

2 2)

46 2)

MHz

HIGHGAIN=1

7 2)

15 2)

SR+

Slew Rate while rising

HIGHGAIN=0

(AVCL=1, RL=10kΩ,

CL=150pF, Vi=1.75V to

2.75V) 1)

12)

2V/

µs

SR-

Slew Rate while falling

HIGHGAIN=0

(AVCL=1, RL=10kΩ,

CL=150pF, Vi=1.75V to

2.75V) 1)

2.52)

7.5

µs

Φm

Phase Margin

HIGHGAIN=0

degrees

HIGHGAIN=1

Twakeup

Wakeup time for the opamp from off

state

0.8 6)

1.6 6)

µs

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