OPA170-Q1 Datasheet, PDF (20/35 Pages) Texas Instruments – 36-V, Single-Supply, Low-Power, Automotive Grade Operational Amplifiers

OPA170-Q1, OPA2170-Q1, OPA4170-Q1
SBOS834 – DECEMBER 2016
www.ti.com
7.4 Device Functional Modes
7.4.1 Common-Mode Voltage Range
The input common-mode voltage range of the OPAx170-Q1 series extends 100 mV below the negative rail and
within 2 V of the top rail for normal operation.
This device can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within
2 V of the top rail. The typical performance in this range is summarized in Table 2.
Table 2. Typical Performance for Common-Mode Voltages Within 2 V of the Positive Supply
PARAMETER
Input common-mode voltage
Offset voltage
Common-mode rejection
Open-loop gain
Gain-bandwidth product
Slew rate
vs temperature
MIN
(V+) – 2
TYP
MAX
UNIT
(V+) + 0.1
V
7
mV
12
µV/°C
65
dB
60
dB
0.3
MHz
0.3
V/µs
7.4.2 Overload Recovery
Overload recovery is defined as the time required for the operational amplifier output to recover from the
saturated state to the linear state. The output devices of the operational amplifier enter the saturation region
when the output voltage exceeds the rated operating voltage, either resulting from the high input voltage or the
high gain. After the device enters the saturation region, the charge carriers in the output devices need time to
return back to the normal state. After the charge carriers return back to the equilibrium state, the device begins to
slew at the normal slew rate. Thus, the propagation delay in case of an overload condition is the sum of the
overload recovery time and the slew time. The overload recovery time for the OPAx170-Q1 is approximately 2
µs.
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