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PDF LT6020-1 Data sheet ( Hoja de datos )
| Número de pieza | LT6020-1 | |
| Descripción | Precision Rail-to-Rail Output Amplifier | |
| Fabricantes | Linear | |
| Logotipo |  |
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Features
n Excellent Slew Rate to Power Ratio
n Slew Rate: 5V/μs
n Maximum Supply Current: 100μA/Amplifier
n Maximum Offset Voltage: 30μV
n Maximum Offset Voltage Drift: 0.5μV/°C
n High Dynamic Input Impedance
n Fast Recovery from Shutdown
n Maximum Input Bias Current: 3nA
n No Output Phase Inversion
n Gain Bandwidth Product: 400kHz
n Wide Specified Supply Range: 3V to 30V
n Operating Temperature Range: –40°C to 125°C
n DFN and MS8 Packages
n Rail-to-Rail Outputs
Applications
n Precision Signal Processing
n 18-Bit DAC Amplifier
n Multiplexed ADC Applications
n Low Power Portable Systems
n Low Power Wireless Sensor Networks
LT6020/LT6020-1
Dual Micropower, 5V/µs
Precision Rail-to-Rail
Output Amplifier
Description
The LT®6020 is a low power, enhanced slew rate, precision
operational amplifier. The proprietary circuit topology of
this amplifier gives excellent slew rate at low quiescent
power dissipation without compromising precision or
settling time. In addition, unique input stage circuitry
allows the input impedance to remain high during input
voltage steps as large as 5V. The combination of preci-
sion specs along with fast settling makes this part ideal
for MUX applications.
The low quiescent current of the LT6020 along with its
ability to operate on supplies as low as 3V make it useful
in portable systems. The LT6020-1 features a shutdown
mode which reduces the typical supply current to 1.4μA.
The LT6020 is available in the small 8-lead DFN and 8-lead
MSOP packages. The LT6020-1 is available in a 10-lead
DFN package.
L, LT, LTC, LTM, Linear Technology, SmartMesh and the Linear logo are registered trademarks
and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Patent Pending.
Typical Application
16-Bit DAC with ±10V Output Swing
20V Output Step Response
3.8VDC TO 5.5VDC
LT1019-2.5
IN OUT
0.1µF
GND
1µF 0.1µF
VDD
LTC2642
REF
POWER-ON
RESET
16-BIT DAC
RFB
INV
VOUT
CS
SCLK
DIN
CLR
CONTROL
LOGIC
16-BIT DATA LATCH
16-BIT SHIFT REGISTER
GND
10pF
15V
–
1/2 LT6020
+
–15V
5V/DIV
5V/DIV
VOUT
1/2 LT6020
LT5400-1
10kΩ MATCHED
RESISTOR NETWORK
60201 TA01a
For more information www.linear.com/LT6020
CS
VOUT
20µs/DIV
60201 TA01b
60201fa
1
1 page  
LT6020/LT6020-1
Electrical Characteristics The l denotes the specifications which apply over the specified
temperature range, otherwise specifications are
EN pin specifications only apply to the LT6020-1.
at
TA
=
25°C,
VS
=
3V,
VCM
=
VOUT
=
Mid-Supply,
VDGND
=
0V,
VEN
=
3V.
DGND
and
SYMBOL PARAMETER
VOS Input Offset Voltage
∆∆TVeOmSpI
∆VOSI
∆Time
IB
IOS
en
in
CIN
RIN
VICM
CMRR
PSRR
Input Offset Voltage Drift (Note 2)
Long Term Input Offset Voltage Stability
Input Bias Current
Input Offset Current
Input Noise Voltage
Input Noise Voltage Density
Input Noise Current Density
Input Capacitance
Input Resistance
Common Mode Input Range
Common Mode Rejection Ratio
Supply Rejection Ratio
AVOL Large-Signal Voltage Gain
VOL Output Swing Low (VOUT – V–)
VOH Output Swing High (V+ – VOUT)
ISC Short-Circuit Current
SR Slew Rate (Note 3)
GBW Gain-Bandwidth Product
Minimum Supply Voltage
CONDITIONS
DD Packages
TA = –40° to 85°C
TA = –40° to 125°C
MS8 Package
TTAA
=
=
–40°
–40°
to
to
85°C
125°C
DD Packages
MS8 Package
MIN
l
l
l
l
l –0.8
l –0.5
l
0.1Hz to 10Hz
f = 10Hz
f = 1kHz
f = 1kHz
Common Mode
Differential Mode
Common Mode
Differential Mode
VCM = 1.2V to 1.6V
VS = 3V to 30V
RL = 6.98kΩ, VOUT = 0.5V to 2.5V
RL = 100kΩ, VOUT = 0.5V to 2.5V
RL = 10kΩ
TA = –40° to 85°C
TA = –40° to 125°C
TTRAAL
=
=
=
10kΩ
–40° to
–40° to
85°C
125°C
VOUT = 1.5V, Sourcing
TA = –40° to 85°C
TA = –40° to 125°C
VOUT = 1.5V, Sinking
TA = –40° to 85°C
TA = –40° to 125°C
AVCL = –1, 2V Step
fO = 10kHz
Guaranteed by PSRR
l V– + 1.2
120
l 118
98
l 98
l
l
l
l
l 3.5
l 3.5
l 5.5
l 5.5
l3
TYP MAX UNITS
20 100
140
150
µV
µV
µV
5 45 µV
85 µV
95 µV
±0.3 0.8 µV/°C
±0.2 0.5 µV/°C
±0.2 µV/Mo
±1 nA
±0.1 nA
1.1 µVP-P
50 nV/√Hz
46 nV/√Hz
37 fA/√Hz
1.5 pF
2.5 pF
17 GΩ
20 MΩ
V+ – 1.4
V
125 dB
140 dB
dB
108 dB
dB
136 dB
45 100 mV
130 mV
150 mV
55 80 mV
90 mV
100 mV
6 mA
mA
mA
8 mA
mA
mA
0.2 V/μs
400 kHz
V
For more information www.linear.com/LT6020
60201fa
5
5 Page 
LT6020/LT6020-1
Pin Functions
OUT: Amplifier Output.
–IN: Inverting Input of the Amplifier.
+IN: Noninverting Input of the Amplifier.
V–: Negative Power Supply. A bypass capacitor should be
used between supply pins and ground. Additional bypass
capacitance may be used between the power supply pins.
DGND (LT6020-1 Only): Reference for EN Pin. It is normally
tied to ground. DGND must be in the range from V– to V+
–3V. If grounded, V+ must be ≥ 3V. The EN pin threshold
is specified with respect to the DGND pin. DGND cannot
be floated.
EN (LT6020-1 Only): Enable Input. This pin must be
connected high, normally to V+, for the amplifiers to be
functional. EN is active high with the threshold approxi-
mately two diodes above DGND. EN cannot be floated.
The shutdown threshold voltage is specified with respect
to the voltage on the DGND pin.
V+: Positive Power Supply. A bypass capacitor should be
used between supply pins and ground. Additional bypass
capacitance may be used between the power supply pins.
Simplified Schematic
V+
LOAD
5k
+IN
5k
–IN
CLASS AB
DRIVE
V–
200k
OUT EN
LT6020-1 ONLY
200k
DGND
60201 BD
Applications Information
Preserving Low Power Operation
The proprietary circuitry used in the LT6020 provides an
excellent combination of low power, low offset and en-
hanced slew rate. Normally an amplifier with higher supply
current would be required to achieve this combination of
slew rate and precision. Special care must be taken to
ensure that the low power operation is preserved.
The choice of feedback resistor values impacts several
op-amp parameters as noted in the feedback compo-
nents section. It should also be noted that the output of
the amplifier must drive this network. For example, in a
gain of two with a total feedback resistance of 10kΩ and
an output voltage of 14V, the amplifier’s output will need
to supply 1.4mA of current. This current will ultimately
come from a supply.
For more information www.linear.com/LT6020
60201fa
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LT6020-1.PDF ] | |
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