LINER LTC2050HV Zero-drift operational amplifiers in sot-23 Datasheet

LTC2050/LTC2050HV
Zero-Drift
Operational Amplifiers
in SOT-23
DESCRIPTION
FEATURES
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Maximum Offset Voltage of 3μV
Maximum Offset Voltage Drift of 30nV/°C
Noise: 1.5μVP-P (0.01Hz to 10Hz Typ)
Voltage Gain: 140dB (Typ)
PSRR: 130dB (Typ)
CMRR: 130dB (Typ)
Supply Current: 0.8mA (Typ)
Supply Operation: 2.7V to 6V (LTC2050)
2.7V to ±5.5V (LTC2050HV)
Extended Common Mode Input Range
Output Swings Rail-to-Rail
Input Overload Recovery Time: 2ms (Typ)
Operating Temperature Range: – 40°C to 125°C
Low Profle (1mm) SOT-23 (ThinSOT)™ Package
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The LTC2050, despite its miniature size, features uncompromising DC performance. The typical input offset voltage
and offset drift are 0.5μV and 10nV/°C. The almost zero
DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of more than 130dB.
The input common mode voltage ranges from the negative supply up to typically 1V from the positive supply.
The LTC2050 also has an enhanced output stage capable
of driving loads as low as 2kΩ to both supply rails. The
open-loop gain is typically 140dB. The LTC2050 also
features a 1.5μVP-P DC to 10Hz noise and a 3MHz gain
bandwidth product.
APPLICATIONS
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The LTC®2050 and LTC2050HV are zero-drift operational
amplifiers available in the 5- or 6-lead SOT-23 and SO-8
packages. The LTC2050 operates from a single 2.7V to
6V supply. The LTC2050HV operates on supplies from
2.7V to ±5.5V. The current consumption is 800μA and the
versions in the 6-lead SOT-23 and SO-8 packages offer
power shutdown (active low).
Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate RC Active Filters
Low Side Current Sense
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
5481178.
TYPICAL APPLICATION
Differential Bridge Amplifier
Input Referred Noise 0.1Hz to 10Hz
2
5V
5V
50Ω
GAIN
TRIM
0.1μF
0.1μF
1
350Ω
STRAIN
GAUGE
4
–
5
LTC2050HV
3
0.1μF
+
(μV)
18.2k
1
0
AV = 100
–1
2
18.2k
–2
2050 TA01
–5V
0
2
4
6
TIME (SEC)
8
10
2050fc
1
LTC2050/LTC2050HV
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V + to V –)
LTC2050..................................................................7V
LTC2050HV ...........................................................12V
Input Voltage ........................ (V + + 0.3V) to (V – – 0.3V)
Output Short-Circuit Duration ......................... Indefinite
Operating Temperature Range................–40°C to 125°C
Specified Temperature Range
(Note 3)..................................................–40°C to 125°C
Storage Temperature Range...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
TOP VIEW
OUT 1
5 V+
OUT 1
V– 2
V– 2
+IN 3
+IN 3
4 –IN
6 V+
5 SHDN
4 –IN
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 230°C/W
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 250°C/W
SHDN 1
8
NC
–IN 2
7
V+
+IN 3
6
OUT
V– 4
5
NC
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 190°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LTC2050CS5#PBF
LTC2050CS5#TRPBF
LTAEG
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2050IS5#PBF
LTC2050IS5#TRPBF
LTAEG
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HS5#PBF
LTC2050HS5#TRPBF
LTAEG
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050HVCS5#PBF
LTC2050HVCS5#TRPBF
LTAEH
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2050HVIS5#PBF
LTC2050HVIS5#TRPBF
LTAEH
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HVHS5#PBF
LTC2050HVHS5#TRPBF
LTAEH
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050CS6#PBF
LTC2050CS6#TRPBF
LTAEJ
6-Lead Plastic TSOT-23
0°C to 70°C
LTC2050IS6#PBF
LTC2050IS6#TRPBF
LTAEJ
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HS6#PBF
LTC2050HS6#TRPBF
LTAEJ
6-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050HVCS6#PBF
LTC2050HVCS6#TRPBF
LTAEK
6-Lead Plastic TSOT-23
0°C to 70°C
LTC2050HVIS6#PBF
LTC2050HVIS6#TRPBF
LTAEK
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HVHS6#PBF
LTC2050HVHS6#TRPBF
LTAEK
6-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050CS8#PBF
LTC2050CS8#TRPBF
2050
8-Lead Plastic SO
0°C to 70°C
LTC2050IS8#PBF
LTC2050IS8#TRPBF
2050I
8-Lead Plastic SO
–40°C to 85°C
LTC2050HVCS8#PBF
LTC2050HVCS8#TRPBF
2050HV
8-Lead Plastic SO
0°C to 70°C
LTC2050HVIS8#PBF
LTC2050HVIS8#TRPBF
050HVI
8-Lead Plastic SO
–40°C to 85°C
2050fc
2
LTC2050/LTC2050HV
ORDER INFORMATION
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LTC2050CS5
LTC2050CS5#TR
LTAEG
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2050IS5
LTC2050IS5#TR
LTAEG
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HS5
LTC2050HS5#TR
LTAEG
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050HVCS5
LTC2050HVCS5#TR
LTAEH
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2050HVIS5
LTC2050HVIS5#TR
LTAEH
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HVHS5
LTC2050HVHS5#TR
LTAEH
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050CS6
LTC2050CS6#TR
LTAEJ
6-Lead Plastic TSOT-23
0°C to 70°C
LTC2050IS6
LTC2050IS6#TR
LTAEJ
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HS6
LTC2050HS6#TR
LTAEJ
6-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050HVCS6
LTC2050HVCS6#TR
LTAEK
6-Lead Plastic TSOT-23
0°C to 70°C
LTC2050HVIS6
LTC2050HVIS6#TR
LTAEK
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC2050HVHS6
LTC2050HVHS6#TR
LTAEK
6-Lead Plastic TSOT-23
–40°C to 125°C
LTC2050CS8
LTC2050CS8#TR
2050
8-Lead Plastic SO
0°C to 70°C
LTC2050IS8
LTC2050IS8#TR
2050I
8-Lead Plastic SO
–40°C to 85°C
LTC2050HVCS8
LTC2050HVCS8#TR
2050HV
8-Lead Plastic SO
0°C to 70°C
LTC2050HVIS8
LTC2050HVIS8#TR
050HVI
8-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2050fc
3
LTC2050/LTC2050HV
ELECTRICAL CHARACTERISTICS
(LTC2050/LTC2050HV) The l denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3)
C, I SUFFIXES
PARAMETER
CONDITIONS
Input Offset Voltage
(Note 2)
Average Input Offset Drift
(Note 2)
MIN
±0.5
l
LTC2050
LTC2050
LTC2050HV
Input Noise Voltage
l
l
Common Mode Rejection Ratio
Power Supply Rejection Ratio
VS = 2.7V to 6V
Large-Signal Voltage Gain
RL = 10k
Output Voltage Swing High
Output Voltage Swing Low
±3
±0.05
50
UNITS
μV
μV/°C
nV/√mo
±20
±75
±300
±20
±75
±4000
pA
pA
±1
±50
±100
±1
±50
±4000
pA
pA
±150
±1000
pA
pA
l
±100
±150
±100
±1000
pA
pA
1.5
1.5
μVP-P
1.7
1.7
pF
l
115
110
130
130
115
110
130
130
dB
dB
l
120
115
130
130
120
115
130
130
dB
dB
l
120
115
140
140
120
115
140
140
dB
dB
RL = 2k to GND
RL = 10k to GND
l
l
2.85
2.95
2.94
2.98
2.85
2.95
2.94
2.98
V
V
RL = 2k to GND
RL = 10k to GND
l
l
1
1
Slew Rate
10
10
1
1
2
Gain Bandwidth Product
l
l
0.75
l
Shutdown Pin Input High Voltage (VIH)
VSHDN = GND
l
0.75
V+ – 0.5
MHz
1.2
10
V – + 0.5
V+ – 0.5
–0.5
7.5
–3
mV
mV
V/μs
3
1.1
10
V – + 0.5
l
10
10
2
3
VSHDN = VIH, No Load
VSHDN = VIL
Shutdown Pin Input Low Voltage (VIL)
Internal Sampling Frequency
±0.5
MAX
±150
±200
RS = 100Ω, 0.01Hz to 10Hz
VCM = GND to (V+ – 1.3)
VCM = GND to (V+ – 1.3)
Shutdown Pin Input Current
±3
TYP
l
Input Capacitance
Supply Current
MIN
50
LTC2050HV
Input Offset Current
MAX
±0.03
Long-Term Offset Drift
Input Bias Current
TYP
H SUFFIX
mA
μA
V
V
–0.5
7.5
–3
μA
kHz
2050fc
4
LTC2050/LTC2050HV
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (LTC2050/LTC2050HV) VS = 5V unless otherwise noted. (Note 3)
C, I SUFFIXES
PARAMETER
CONDITIONS
Input Offset Voltage
(Note 2)
Average Input Offset Drift
(Note 2)
MIN
±0.5
±3
MIN
LTC2050
LTC2050HV
Input Noise Voltage
RS = 100Ω, 0.01Hz to 10Hz
Common Mode Rejection Ratio
VCM = GND to (V + – 1.3)
VCM = GND to (V + – 1.3)
Power Supply Rejection Ratio
VS = 2.7V to 6V
Large-Signal Voltage Gain
RL = 10k
Output Voltage Swing High
Output Voltage Swing Low
TYP
MAX
±0.5
±3
±0.03
±0.05
50
LTC2050
LTC2050HV
Input Offset Current
MAX
l
Long-Term Offset Drift
Input Bias Current
H SUFFIX
TYP
l
l
50
UNITS
μV
μV/°C
nV/√mo
±75
±150
±300
±75
±150
±4000
pA
pA
±7
±50
±150
±7
±50
±4000
pA
pA
l
±300
±400
±300
±1000
pA
pA
l
±100
±200
±100
±1000
pA
pA
1.5
1.5
μVP-P
l
120
115
130
130
120
110
130
130
dB
dB
l
120
115
130
130
120
115
130
130
dB
dB
l
125
120
140
140
125
115
140
140
dB
dB
RL = 2k to GND
RL = 10k to GND
l
l
4.85
4.95
4.94
4.98
4.85
4.95
4.94
4.98
V
V
RL = 2k to GND
RL = 10k to GND
l
l
1
1
10
10
1
1
10
10
mV
mV
Slew Rate
2
2
V/μs
Gain Bandwidth Product
3
3
MHz
Supply Current
VSHDN = VIH, No Load
VSHDN = VIL
l
Shutdown Pin Input High Voltage (VIH)
Internal Sampling Frequency
0.8
VSHDN = GND
l
1.2
15
0.8
V– + 0.5
l
Shutdown Pin Input Low Voltage (VIL)
Shutdown Pin Input Current
l
l
V+ – 0.5
1.3
15
V– + 0.5
V
–7
μA
V+ – 0.5
–0.5
7.5
–7
mA
μA
V
–0.5
7.5
kHz
2050fc
5
LTC2050/LTC2050HV
ELECTRICAL CHARACTERISTICS
(LTC2050HV) The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3)
C, I SUFFIXES
PARAMETER
CONDITIONS
Input Offset Voltage
(Note 2)
Average Input Offset Drift
(Note 2)
MIN
MAX
±0.5
±3
l
50
Input Bias Current (Note 4)
±25
l
RS = 100Ω, 0.01Hz to 10Hz
Common Mode Rejection Ratio
VCM = V – to (V + – 1.3)
VCM = V – to (V + – 1.3)
Power Supply Rejection Ratio
VS = 2.7V to 11V
Large-Signal Voltage Gain
RL = 10k
Maximum Output Voltage Swing
RL = 2k to GND
RL = 10k to GND
50
±125
±300
±25
1.5
μV
μV/°C
nV/√mo
±125
±4000
pA
pA
±250
±1000
pA
pA
1.5
μVP-P
l
120
115
130
130
dB
dB
l
120
115
130
130
120
115
130
130
dB
dB
125
120
140
140
125
120
140
140
dB
dB
±4.75
±4.90
±4.94
±4.98
±4.50
±4.85
±4.94
±4.98
V
V
l
l
2
3
l
l
Shutdown Pin Input Low Voltage (VIL)
l
Shutdown Pin Input High Voltage (VIH)
l
VSHDN = V –
±3
UNITS
130
130
Gain Bandwidth Product
Shutdown Pin Input Current
±0.5
±0.05
2
VSHDN = VIH, No Load
VSHDN = VIL
MAX
120
115
Slew Rate
Supply Current
TYP
±250
±500
l
Input Noise Voltage
MIN
±0.03
Long-Term Offset Drift
Input Offset Current (Note 4)
H SUFFIX
TYP
l
Internal Sampling Frequency
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels during automated testing.
Note 3: All versions of the LTC2050 are designed, characterized and
expected to meet the extended temperature limits of – 40°C and 125°C.
1
V/μs
3
1.5
25
1
V – + 0.5
V + – 0.5
MHz
1.6
25
V – + 0.5
V + – 0.5
–3
7.5
–20
mA
μA
V
V
–3
7.5
–20
μA
kHz
The LTC2050C/LTC2050HVC are guaranteed to meet the temperature limits
of 0°C and 70°C. The LTC2050I/LTC2050HVI are guaranteed to meet the
temperature limits of –40°C and 85°C. The LTC2050H/LTC2050HVH are
guaranteed to meet the temperature limits of –40°C and 125°C.
Note 4: The bias current measurement accuracy depends on the proximity
of the supply bypass capacitor to the device under test, especially at ±5V
supplies. Because of testing limitations on the placement of this bypass
capacitor, the bias current at ±5V supplies is guaranteed by design to meet
the data sheet limits, but tested to relaxed limits.
2050fc
6
LTC2050/LTC2050HV
TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
DC CMRR vs Common Mode Input
Voltage
140
VS = 3V OR 5V
VCM = 0.5VP-P
120
120
120
100
60
80
60
40
20
20
0
0
10k
100
1k
FREQUENCY (Hz)
100k
TA = 25°C
2
1
3
0
5
4
VCM (V)
10
100
2050 G02
5
RL TO GND
4
5
2
3
VS = 5V
OUTPUT SWING (V)
OUTPUT VOLTAGE (V)
VS = 3V
4
3
VS = 3V
2
1
1
0
0
0.01
1M
100k
Output Swing vs Load Resistance
±5V Supply
6
4
1k
10k
FREQUENCY (Hz)
2050 G14
Output Swing vs Output Current
VS = 5V
3
20
2050 G01
RL TO GND
5
+PSRR
60
40
0
Output Voltage Swing vs Load
Resistance
6
VS = 5V
VS = 3V
40
10
80
PSRR (dB)
80
1
OUTPUT SWING (V)
–PSRR
100
CMRR (dB)
CMRR (dB)
100
PSRR vs Frequency
140
2
1
0
–1
–2
–3
–4
2
10
8
6
4
LOAD RESISTANCE (kΩ)
–5
0.1
1
OUTPUT CURRENT (mA)
Output Swing vs Output Current
±5V Supply
10
10k
RL TO GND
80
100
PHASE
1k
60
2
GAIN (dB)
1
0
–1
–2
120
40
GAIN
140
20
160
0
–3
–20
–4
0.1
1.0
OUTPUT CURRENT (mA)
10
2050 G17
PHASE (DEG)
OUTPUT SWING (V)
6
8
4
LOAD RESISTANCE (kΩ)
Bias Current vs Temperature
80
100
3
–5
0.01
2
2050 G16
Gain/Phase vs Frequency
5
0
2050 G04
2050 G03
4
10
BIAS CURRENT (pA)
0
VS = 5V
100
VS = 3V
10
VS = 3V OR 5V
CL = 35pF
RL = 10kΩ
–40
100
1k
100k
10k
FREQUENCY (Hz)
180
1M
200
10M
2050 G05
1
–50
–25
75
50
0
25
TEMPERATURE (°C)
100
125
2050 G06
2050fc
7
LTC2050/LTC2050HV
TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current vs Input
Common Mode Voltage
(LTC2050HV)
160
60
140
50
INPUT BIAS CURRENT (pA)
INPUT BIAS CURRENT MAGNITUDE (pA)
Input Bias Current vs Input
Common Mode Voltage
120
VS = 5V
100
80
60
VS = 3V
40
VS = ±5V
0.5/DIV
30
20
VS = 5V
10
VS = 3V
0
20
0
40
Transient Response
AV = 1
RL = 100k
CL = 50pF
VS = 5V
–10
0
1
2
4
3
INPUT COMMON MODE VOLTAGE (V)
5
–5
–1
1
3
–3
INPUT COMMON MODE VOLTAGE (V)
5
1μs/DIV
2050 G07
2050 G15
2050 G13
Sampling Frequency
vs Supply Voltage
Input Overload Recovery
Sampling Frequency
vs Temperature
10
10
TA = 25°C
0
0
INPUT (V)
–0.2
AV = –100
RL = 100k
CL = 10pF
VS = ±1.5V
500μs/DIV
2050 G08
SAMPLING FREQUENCY (kHz)
OUTPUT (V)
SAMPLING FREQUENCY (kHz)
1.5
9
8
7
6
5
2.5
3.0
3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
6.0
9
8
VS = 5V
7
6
5
–50
–25
50
25
0
75
TEMPERATURE (°C)
2050 G09
Supply Current vs Supply Voltage
2050 G10
Supply Current vs Temperature
TA = 25°C
VS = 5V
1.0
0.8
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
125
1.0
1.2
0.8
0.6
0.4
VS = 3V
0.6
0.4
0.2
0.2
0
100
2
4
8
6
SUPPLY VOLTAGE (V)
10
2050 G11
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
2050 G12
2050fc
8
LTC2050/LTC2050HV
TEST CIRCUITS
Electrical Characteristics Test Circuit
100k
OUTPUT
V+
10Ω
4
5
–
LTC2050
3
+
1
2
RL
V–
2050 TC01
DC-10Hz Noise Test Circuit
100k
10Ω
4
–
0.01μF
LTC2050
3
475k
+
1
158k
316k
475k
–
0.1μF
0.01μF
LT1012
TO X-Y
RECORDER
+
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
2050 TC02
2050fc
9
LTC2050/LTC2050HV
APPLICATIONS INFORMATION
Shutdown
The LTC2050 includes a shutdown pin in the 6-lead SOT-23
and the SO-8 version. When this active low pin is high or
allowed to float, the device operates normally. When the
shutdown pin is pulled low, the device enters shutdown
mode; supply current drops to 3μA, all clocking stops, and
both inputs and output assume a high impedance state.
Clock Feedthrough, Input Bias Current
The LTC2050 uses auto-zeroing circuitry to achieve an
almost zero DC offset over temperature, common mode
voltage, and power supply voltage. The frequency of the
clock used for auto-zeroing is typically 7.5kHz. The term
clock feedthrough is broadly used to indicate visibility of
this clock frequency in the op amp output spectrum. There
are typically two types of clock feedthrough in auto zeroed
op amps like the LTC2050.
The first form of clock feedthrough is caused by the settling
of the internal sampling capacitor and is input referred;
that is, it is multiplied by the closed loop gain of the op
amp. This form of clock feedthrough is independent of the
magnitude of the input source resistance or the magnitude
of the gain setting resistors. The LTC2050 has a residue
clock feedthrough of less then 1μVRMS input referred
at 7.5kHz.
The second form of clock feedthrough is caused by the
small amount of charge injection occurring during the
sampling and holding of the op amp’s input offset voltage.
The current spikes are multiplied by the impedance seen at
the input terminals of the op amp, appearing at the output
multiplied by the closed loop gain of the op amp. To reduce
this form of clock feedthrough, use smaller valued gain
setting resistors and minimize the source resistance at the
input. If the resistance seen at the inputs is less than 10k,
this form of clock feedthrough is less than 1μVRMS input
referred at 7.5kHz, or less than the amount of residue clock
feedthrough from the first form described above.
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed loop gain.
Input bias current is defined as the DC current into the
input pins of the op amp. The same current spikes that
cause the second form of clock feedthrough described
above, when averaged, dominate the DC input bias current
of the op amp below 70°C.
At temperatures above 70°C, the leakage of the ESD
protection diodes on the inputs increases the input bias
currents of both inputs in the positive direction, while
the current caused by the charge injection stays relatively constant. At elevated temperatures (above 85°C) the
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
Input Pins, ESD Sensitivity
ESD voltages above 700V on the input pins of the op amp
will cause the input bias currents to increase (more DC
current into the pins). At these voltages, it is possible to
damage the device to a point where the input bias current
exceeds the maximums specified in this data sheet.
2050fc
10
LTC2050/LTC2050HV
TYPICAL APPLICATIONS
Single Supply Thermocouple Amplifier
1k
1%
255k
1%
100Ω
0.068μF
5V
5V
2
4
LT1025A
K
GND
R–
5
4
3
7
–
+
5
–
1
LTC2050
+
VOUT
10mV/°C
2
0.1μF
TYPE K
LT1025 COMPENSATES COLD JUNCTION
OVER 0°C TO 100°C TEMPERATURE RANGE
2050 TA03
Gain of 1001 Single Supply Instrumentation Amplifier
0.1μF
10Ω
10k
V+
10k
4
–
LTC2050
–VIN
3
+
V+
5
1
10Ω
–
5
LTC2050
2
+VIN
OUTPUT DC OFFSET ≤ 6mV
FOR 0.1% RESISTORS, CMRR = 54dB
4
3
+
1
VOUT
2
2050 TA04
2050fc
11
LTC2050/LTC2050HV
TYPICAL APPLICATIONS
Instrumentation Amplifier with 100V Common Mode Input Voltage
1k
1M
V+
1M
4
+
VIN
–
LTC2050HV
1M
3
–
1k
+
V+
5
2
V–
1
1k
4
–
5
LTC2050HV
3
+
1
VOUT
2
V–
OUTPUT OFFSET ≤3mV
FOR 0.1% RESISTORS, CMRR = 54dB
High Precision 3-Input Mux
1.1k
2050 TA06
Low Side Power Supply Current Sensing
10k
5V
SHDN
4
–
LTC2050
IN 1 3
AV = 10
–
OUT
SHDN
5
SEL2
1
–
2
TO
MEASURED
CIRCUIT
OUT
3V/AMP
LOAD CURRENT
IN MEASURED
CIRCUIT, REFERRED
TO –5V
10k
3mΩ
0.1μF
LOAD CURRENT
–5V
2050 TA08
1
+
–
SEL3
5
LTC2050
IN 3 3
AV = 1
4
10k
SHDN
4
5
10Ω
LTC2050
IN 2 3
AV = 1000
+
LTC2050HV
1
+
10Ω
4
3
SEL1
5
1
+
2050 TA07
SELECT INPUTS ARE CMOS LOGIC COMPATIBLE
2050fc
12
LTC2050/LTC2050HV
PACKAGE DESCRIPTION
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1.90 BSC
S5 TSOT-23 0302 REV B
2050fc
13
LTC2050/LTC2050HV
PACKAGE DESCRIPTION
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
0.62
MAX
2.90 BSC
(NOTE 4)
0.95
REF
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.90 BSC
S6 TSOT-23 0302 REV B
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
2050fc
14
LTC2050/LTC2050HV
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.050 BSC
8
.245
MIN
7
6
5
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
s 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
3
4
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
2
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.050
(1.270)
BSC
SO8 0303
2050fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LTC2050/LTC2050HV
TYPICAL APPLICATION
Ground Referred Precision Current Sources
LT1034
0 ≤ IOUT ≤ 4mA
(V–) + 1.5V ≤ VOUT ≤ – 1V
+
VOUT
–
1.235V
IOUT = ———
RSET
V+
10k
4
5
–
LTC2050
3
+
1
3
2
RSET
10k
1.235V
IOUT = ———
RSET
+
LTC2050
4
RSET
5
+
–
1
2
V–
VOUT
–
0 ≤ IOUT ≤ 4mA
0.2V ≤ VOUT ≤ (V+) – 1.5V
LT1034
2050 TA05
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1049
Low Power Zero-Drift Op Amp
Low Supply Current 200μA
LTC1050
Precision Zero-Drift Op Amp
Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed
LTC1051/LTC1053
Precision Zero-Drift Op Amp
Dual/Quad
LTC1150
±15V Zero-Drift Op Amp
High Voltage Operation ±18V
LTC1152
Rail-to-Rail Input and Output Zero-Drift Op Amp
Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown
LT1677
Low Noise Rail-to-Rail Input and Output
Precision Op Amp
VOS = 90μV, VS = 2.7V to 44V
LT1884/LT1885
Rail-to-Rail Output Precision Op Amp
VOS = 50μV, IB = 400pA, VS = 2.7V to 40V
LTC2051
Dual Zero-Drift Op Amp
Dual Version of the LTC2050 in MS8 Package
2050fc
16 Linear Technology Corporation
LT 0709 REV C • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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© LINEAR TECHNOLOGY CORPORATION 1999