This product features an excellent speed/power
consumption ratio, offering a 420 kHz gain
bandwidth while consuming only 29 µA at a
5 V supply voltage.
■ Battery-powered applications
■ Portable devices
■ Signal conditioning
■ Active filtering
■ Medical instrumentation
Description
The TSV620 and TSV621 are single operational
amplifiers offering low voltage, low power
operation and rail-to-rail input and output.
With a very low input bias current and low offset
voltage (800 µV maximum for the A version), the
TSV62x is ideal for applications requiring
precision. The device can operate at a power
supply ranging from 1.5 to 5.5 V, and therefore
suits battery-powered devices and extends their
battery life.
These operational amplifiers are unity gain stable
for capacitive loads up to 100 pF.
The device is internally adjusted to provide very
narrow dispersion of AC and DC parameters,
especially power consumption, product gain
bandwidth and slew rate.
The TSV62x presents a high tolerance to ESD,
sustaining 4 kV for the human body model.
The devices are offered in macropackages,
SC70-6 and SOT23-6 for the TSV620 and
SC70-5 and SOT23-5 for the TSV621. They are
guaranteed for industrial temperature ranges from
-40° C to +125° C.
All these features make the TSV620 and TSV621
ideal for sensor interfaces, battery-supplied and
portable applications, as well as active filtering.
October 2009Doc ID 14912 Rev 21/24
www.st.com
24
ContentsTSV620, TSV620A, TSV621, TSV621A
Contents
1Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
TSV620, TSV620A, TSV621, TSV621AAbsolute maximum ratings and operating conditions
1 Absolute maximum ratings and operating conditions
Table 1.Absolute maximum ratings (AMR)
SymbolParameterValueUnit
(3)
(4)
(1)
(5)
(9)
(2)
(8)
(10)
(6)(7)
V
V
CC-
CC-
6V
±V
CC
-0.2 to V
+0.2V
CC+
V
10mA
-0.2 to V
+0.2V
CC+
205
250
°C/W
240
232
4kV
300V
1.5kV
V
CC
V
id
V
in
I
in
SHDN
T
stg
R
thja
T
j
ESD
Supply voltage
Differential input voltage
Input voltage
Input current
Shutdown voltage
Storage temperature-65 to +150°C
Thermal resistance junction to ambient
SC70-5
SOT23-5
SOT23-6
SC70-6
Maximum junction temperature150°C
HBM: human body model
MM: machine model
CDM: charged device model
Latch-up immunity200mA
1. All voltage values, except differential voltage are with respect to network ground terminal.
2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
3. Vcc-Vin must not exceed 6 V.
4. Input current must be limited by a resistor in series with the inputs.
5. Vcc-SHDN must not exceed 6 V.
6. Short-circuits can cause excessive heating and destructive dissipation.
are typical values.
7. R
th
8. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
9. Machine mode: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5
combinations with other pins floating.
10. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
The TSV620 and TSV621 can operate from 1.5 to 5.5 V. Their parameters are fully specified
for 1.8, 3.3 and 5 V power supplies. However, the parameters are very stable in the full V
range and several characterization curves show the TSV62x characteristics at 1.5 V.
Additionally, the main specifications are guaranteed in extended temperature ranges from
-40° C to +125° C.
3.2 Rail-to-rail input
The TSV62x is built with two complementary PMOS and NMOS input differential pairs. The
device has a rail-to-rail input and the input common mode range is extended from
V
-0.1 V to V
CC-
the transition region, the performances of CMRR, PSRR, V
(as shown in Figure 14 and Figure 15 for V
+0.1 V. The transition between the two pairs appears at VCC -0.7 V. In
CC+
= 1.5 V
CC+
and THD are slightly degraded
vs. V
io
icm
io
).
Figure 15. Input offset voltage vs input
common mode at V
0.40.4
0.20.2
0.00.0
-0.2-0.2
Input Offset Voltage (mV)
-0.4-0.4
0.00.01.01.02.02.03.03.04.04.05.05.0
Input Common Mode Voltage (V)
CC+
= 5 V
CC
The device is guaranteed without phase reversal.
3.3 Rail-to-rail output
The operational amplifier’s output level can go close to the rails: 35 mV maximum above and
below the rail when connected to a 10 kΩ resistive load to V
12/24Doc ID 14912 Rev 2
CC
/2.
TSV620, TSV620A, TSV621, TSV621AApplication information
3.4 Shutdown function (TSV620)
The operational amplifier is enabled when the SHDN pin is pulled high. To disable the
amplifier, the SHDN
output is in a high impedance state. The SHDN
V
or V
CC+
CC-
The turn-on and turn-off times are calculated for an output variation of
and Figure 17 show the test configurations).
This device uses an innovative approach to reduce the spread of the main DC and AC
parameters. An internal adjustment achieves a very narrow spread of current consumption
(29 µA typical, min/max at ±17%). Parameters linked to the current consumption value, such
as GBP, SR and AVd benefit from this narrow dispersion. All parts present a similar speed
and the same behavior in terms of stability. In addition, the minimum values of GBP and SR
are guaranteed (GBP = 350 kHz min, SR = 0.15 V/µs min).
3.6 Driving resistive and capacitive loads
These products are micro-power, low-voltage operational amplifiers optimized to drive rather
large resistive loads, above 5 kΩ. For lower resistive loads, the THD level may significantly
increase.
In a follower configuration, these operational amplifiers can drive capacitive loads up to
100 pF with no oscillations. When driving larger capacitive loads, adding a small in-series
resistor at the output can improve the stability of the device (see Figure 20 for
recommended in-series resistor values). Once the in-series resistor value has been
selected, the stability of the circuit should be tested on bench and simulated with the
simulation model.
Figure 20. In-series resistor vs. capacitive load
3.7 PCB layouts
For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible
to the power supply pins.
(Ω)
In-series resistor
14/24Doc ID 14912 Rev 2
TSV620, TSV620A, TSV621, TSV621AApplication information
3.8 Macromodel
An accurate macromodel of TSV620-TSV621 is available on STMicroelectronics’ web site at
www.st.com. This model is a trade-off between accuracy and complexity (that is, time
simulation) of the TSV62x operational amplifiers. It emulates the nominal performances of a
typical device within the specified operating conditions mentioned in the datasheet. It helps
to validate a design approach and to select the right operational amplifier, but it does not replace on-board measurements.
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
16/24Doc ID 14912 Rev 2
TSV620, TSV620A, TSV621, TSV621APackage information
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