LTC2050/LTC2050HV
Zero-Drift
Operational Amplifiers
in SOT-23
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FEATURES
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DESCRIPTIO
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).
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
SOT-23 Package
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.
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APPLICATIO S
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Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate RC Active Filters
Low Side Current Sense
, LTC and LT are registered trademarks of Linear Technology Corporation.
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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 openloop gain is typically 140dB. The LTC2050 also features a
1.5µVP-P DC to 10Hz noise and a 3MHz gain bandwidth
product.
TYPICAL APPLICATION
Input Referred Noise 0.1Hz to 10Hz
Differential Bridge Amplifier
2
5V
5V
50Ω
GAIN
TRIM
0.1µF
0.1µF
1
µV
18.2k
350Ω
STRAIN
GAUGE
4
–
LTC2050HV
3
0.1µF
+
0
5
1
AV = 100
–1
2
18.2k
–2
2050 TA01
– 5V
0
2
4
6
TIME (SEC)
8
10
2050fa
1
LTC2050/LTC2050HV
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ABSOLUTE
RATI GS (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
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
OUT 1
V
TOP VIEW
5 V+
OUT 1
–2
+IN 3
–
V 2
4 –IN
+IN 3
SHDN 1
8
NC
6 V+
–IN 2
7
V+
5 SHDN
+IN 3
6
OUT
5
NC
4 –IN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
S6 PACKAGE
6-LEAD PLASTIC SOT-23
TJMAX = 125°C, θJA = 250°CW
TJMAX = 125°C, θJA = 230°CW
V–
4
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 190°CW
ORDER PART
NUMBER
S5 PART
MARKING
ORDER PART
NUMBER
S6 PART
MARKING
ORDER PART
NUMBER
LTC2050CS5
LTC2050IS5
LTC2050HS5
LTC2050HVCS5
LTC2050HVIS5
LTC2050HVHS5
LTAEG
LTAEG
LTAEG
LTAEH
LTAEH
LTAEH
LTC2050CS6
LTC2050IS6
LTC2050HS6
LTC2050HVCS6
LTC2050HVIS6
LTC2050HVHS6
LTAEJ
LTAEJ
LTAEJ
LTAEK
LTAEK
LTAEK
LTC2050CS8
LTC2050IS8
LTC2050HVCS8
LTC2050HVIS8
S8 PART
MARKING
2050
2050I
2050HV
050HVI
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
(LTC2050, LTC2050HV) The ● denotes specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3)
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current
CONDITIONS
(Note 2)
(Note 2)
●
LTC2050
●
LTC2050HV
●
Input Offset Current
LTC2050
●
LTC2050HV
●
Input Noise Voltage
Common Mode Rejection Ratio
RS = 100Ω, 0.01Hz to 10Hz
VCM = GND to (V + – 1.3)
VCM = GND to (V + – 1.3)
●
LTC2050C/LTC2050I
MIN
TYP
MAX
±0.5
±3
±0.03
50
±20
±75
±300
±1
±50
±100
±150
±200
±100
±150
1.5
115
130
110
130
MIN
LTC2050H
TYP
±0.5
50
±20
±1
115
110
1.5
130
130
MAX
±3
±0.05
±75
±4000
±50
±4000
±150
±1000
±100
±1000
UNITS
µV
µV/°C
nV/√mo
pA
pA
pA
pA
pA
pA
pA
pA
µVP-P
dB
dB
2050fa
2
LTC2050/LTC2050HV
ELECTRICAL CHARACTERISTICS
(LTC2050, LTC2050HV) The ● denotes specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3)
PARAMETER
Power Supply Rejection Ratio
CONDITIONS
VS = 2.7V to 6V
Large-Signal Voltage Gain
RL = 10k
Output Voltage Swing High
RL = 2k to GND
RL = 10k to GND
RL = 2k to GND
RL = 10k to GND
●
●
VSHDN = V IH, No Load
VSHDN = V IL
●
●
●
●
Output Voltage Swing Low
Slew Rate
Gain Bandwidth Product
Supply Current
Shutdown Pin Input Low Voltage (VIL)
Shutdown Pin Input High Voltage (VIH)
Shutdown Pin Input Current
Internal Sampling Frequency
●
●
●
●
VSHDN = GND
●
LTC2050C/LTC2050I
MIN
TYP
MAX
120
130
115
130
120
140
115
140
2.85
2.94
2.95
2.98
1
10
1
10
2
3
0.75
1.1
10
V – + 0.5
V + – 0.5
– 0.5
–3
7.5
MIN
120
115
120
115
2.85
2.95
LTC2050H
TYP
130
130
140
140
2.94
2.98
1
1
2
3
0.75
MAX
10
10
1.2
10
V– + 0.5
V + – 0.5
– 0.5
7.5
–3
UNITS
dB
dB
dB
dB
V
V
mV
mV
V/µs
MHz
mA
µA
V
V
µA
kHz
The ● denotes 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)
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current
CONDITIONS
(Note 2)
(Note 2)
●
LTC2050
●
LTC2050HV
●
Input Offset Current
LTC2050
●
LTC2050HV
●
Input Noise Voltage
Common Mode Rejection Ratio
Power Supply Rejection Ratio
RS = 100Ω, 0.01Hz to 10Hz
VCM = GND to (V + – 1.3)
VCM = GND to (V + – 1.3)
VS = 2.7V to 6V
Large-Signal Voltage Gain
RL = 10k
●
●
●
Output Voltage Swing High
Output Voltage Swing Low
Slew Rate
Gain Bandwidth Product
Supply Current
RL = 2k to GND
RL = 10k to GND
RL = 2k to GND
RL = 10k to GND
●
●
VSHDN = V IH, No Load
VSHDN = V IL
●
●
●
●
LTC2050C/LTC2050I
MIN
TYP
MAX
±0.5
±3
±0.03
50
±75
±150
±300
±7
±50
±150
±300
±400
±100
±200
1.5
120
130
115
130
120
130
115
130
125
140
120
140
4.85
4.94
4.95
4.98
1
10
1
10
2
3
0.8
1.2
15
MIN
LTC2050H
TYP
±0.5
50
±75
±7
120
110
120
115
125
115
4.85
4.95
1.5
130
130
130
130
140
140
4.94
4.98
1
1
2
3
0.8
MAX
±3
±0.05
±150
±4000
±50
±4000
±300
±1000
±100
±1000
10
10
1.3
15
UNITS
µV
µV/°C
nV/√mo
pA
pA
pA
pA
pA
pA
pA
pA
µVP-P
dB
dB
dB
dB
dB
dB
V
V
mV
mV
V/µs
MHz
mA
µA
2050fa
3
LTC2050/LTC2050HV
ELECTRICAL CHARACTERISTICS
The ● denotes 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)
PARAMETER
Shutdown Pin Input Low Voltage (VIL)
Shutdown Pin Input High Voltage (VIH)
Shutdown Pin Input Current
Internal Sampling Frequency
CONDITIONS
●
●
VSHDN = GND
●
LTC2050C/LTC2050I
MIN
TYP
MAX
V – + 0.5
V + – 0.5
– 0.5
–7
7.5
MIN
LTC2050H
TYP
MAX
V – + 0.5
V + – 0.5
– 0.5
7.5
–7
UNITS
V
V
µA
kHz
(LTC2050HV) The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at
TA = 25°C. VS = ±5V unless otherwise noted. (Note 3)
PARAMETER
CONDITIONS
Input Offset Voltage
(Note 2)
Average Input Offset Drift
(Note 2)
LTC2050C/LTC2050I
MIN
TYP
MAX
±0.5
±25
RS = 100Ω, 0.01Hz to 10Hz
Common Mode Rejection Ratio
VCM = V – to (V + – 1.3)
VCM = V – to (V + – 1.3)
Maximum Output Voltage Swing
±125
±300
●
±250
±500
±25
UNITS
µV
µV/°C
nV/√mo
±125
±4000
pA
pA
±250
±1000
pA
pA
1.5
µVP-P
●
120
115
130
130
120
115
130
130
dB
dB
●
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
1.5
VS = 2.7V to 11V
RL = 10k
RL = 2k to GND
RL = 10k to GND
±3
50
●
Input Offset Current (Note 4)
Input Noise Voltage
MAX
±0.5
±0.05
50
Input Bias Current (Note 4)
Large-Signal Voltage Gain
±3
LTC2050H
TYP
±0.03
●
Long-Term Offset Drift
Power Supply Rejection Ratio
MIN
Slew Rate
2
2
V/µs
Gain Bandwidth Product
3
3
MHz
Supply Current
VSHDN = V IH, No Load
VSHDN = V IL
Shutdown Pin Input Low Voltage (VIL)
●
VSHDN = V –
Internal Sampling Frequency
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
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.
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.
●
1.5
25
1
V – + 0.5
●
Shutdown Pin Input High Voltage (VIH)
Shutdown Pin Input Current
1
●
●
V+
V – + 0.5
V+
– 0.5
–3
7.5
– 20
1.6
25
– 0.5
mA
µA
V
V
–3
7.5
– 20
µA
kHz
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.
2050fa
4
LTC2050/LTC2050HV
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TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
DC CMRR vs Common Mode Input
Voltage
140
VS = 3V OR 5V
VCM = 0.5VP-P
120
140
120
100
–PSRR
100
80
60
80
80
PSRR (dB)
CMRR (dB)
100
CMRR (dB)
PSRR vs Frequency
120
VS = 5V
VS = 3V
60
+PSRR
60
40
40
40
20
20
20
TA = 25°C
0
0
10
1
100
1k
FREQUENCY (Hz)
10k
0
0
100k
1
2
3
4
5
RL TO GND
4
5
4
VS = 3V
2
3
VS = 5V
OUTPUT SWING (V)
OUTPUT VOLTAGE (V)
VS = 5V
4
3
VS = 3V
2
1
1
0
0
0.01
1M
Output Swing vs Load Resistance
±5V Supply
Output Swing vs Output Current
6
3
1k
10k
100k
FREQUENCY (Hz)
LTC2050 • G14
RL TO GND
5
100
2050 G02
Output Voltage Swing vs Load
Resistance
6
10
VCM (V)
2050 G01
OUTPUT SWING (V)
5
2
1
0
–1
–2
–3
–4
2
10
8
6
4
LOAD RESISTANCE (kΩ)
0.1
1
OUTPUT CURRENT (mA)
Output Swing vs Output Current
±5V Supply
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)
10
Bias Current vs Temperature
80
100
3
–5
0.01
6
8
4
LOAD RESISTANCE (kΩ)
2050 G16
Gain/Phase vs Frequency
5
2
0
2050 G04
2050 G03
4
–5
10
BIAS CURRENT (pA)
0
VS = 5V
100
VS = 3V
10
VS = 3V OR 5V
CL = 35pF
RL = 10kΩ
–40
100
1k
10k
100k
FREQUENCY (Hz)
180
1M
200
10M
2050 G05
1
–50
–25
75
50
0
25
TEMPERATURE (°C)
100
125
2050 G06
2050fa
5
LTC2050/LTC2050HV
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TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current vs Input
Common Mode Voltage
(LTC2050HV)
160
60
140
50
120
VS = 5V
100
80
60
VS = 3V
40
40
Transient Response
VS = ±5V
30
0.5V/DIV
INPUT BIAS CURRENT (pA)
INPUT BIAS CURRENT MAGNITUDE (pA)
Input Bias Current vs Input
Common Mode Voltage
20
VS = 5V
10
VS = 3V
0
20
–10
0
0
1
2
4
3
INPUT COMMON MODE VOLTAGE (V)
5
–5
–1
1
3
–3
INPUT COMMON MODE VOLTAGE (V)
AV = 1
RL = 100k
CL = 50pF
VS = 5V
5
2050 G15
2050 G13
Sampling Frequency
vs Supply Voltage
Input Overload Recovery
1µs/DIV
2050 G07
Sampling Frequency
vs Temperature
10
10
OUTPUT (V)
SAMPLING FREQUENCY (kHz)
1.5
INPUT (V)
0
0
SAMPLING FREQUENCY (kHz)
TA = 25°C
9
8
7
6
9
8
VS = 5V
7
6
–0.2
5
AV = –100
RL = 100k
CL = 10pF
VS = ±1.5V
2050 G08
500µs/DIV
3.0
2.5
3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
6.0
5
–50
–25
50
25
0
75
TEMPERATURE (°C)
Supply Current vs Temperature
1.0
1.2
TA = 25°C
VS = 5V
0.8
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
1.0
0.8
0.6
0.4
VS = 3V
0.6
0.4
0.2
0.2
0
125
2050 G10
2050 G09
Supply Current vs Supply Voltage
100
2
4
8
6
SUPPLY VOLTAGE (V)
10
2050 G11
0
–50
–25
50
0
75
25
TEMPERATURE (°C)
100
125
2050 G12
2050fa
6
LTC2050/LTC2050HV
TEST CIRCUITS
DC-10Hz Noise Test Circuit
Electrical Characteristics
Test Circuit
100k
100k
475k
OUTPUT
V+
10Ω
4
–
10Ω
5
LTC2050
3
+
4
–
1
LTC2050
3
2
0.01µF
RL
+
1
158k
316k
475k
–
0.1µF
0.01µF
LT1012
TO X-Y
RECORDER
+
V–
2050 TC01
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
2050 TC02
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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.
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 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 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.
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
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed loop gain.
Clock Feedthrough, Input Bias Current
2050fa
7
LTC2050/LTC2050HV
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APPLICATIONS INFORMATION
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.
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
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
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.
Input Pins, ESD Sensitivity
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TYPICAL APPLICATIONS
Single Supply Thermocouple Amplifier
1k
1%
255k
1%
100Ω
0.068µF
5V
5V
2
4
LT1025A
K
GND
4
R–
5
5
–
1
LTC2050
3
7
–
+
+
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
2050fa
8
LTC2050/LTC2050HV
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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 Three-Input Mux
1.1k
2050 TA06
Low-Side Power Supply Current Sensing
10k
5V
SHDN
4
–
LTC2050
IN 1 3
AV = 10
4
–
10k
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
2050 TA08
1
+
–
SEL3
5
LTC2050
IN 3 3
AV = 1
–
– 5V
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
2050fa
9
LTC2050/LTC2050HV
U
PACKAGE DESCRIPTION
S5 Package
5-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1633)
0.62
MAX
0.95
REF
2.80 – 3.10
(NOTE 4)
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.60 – 3.00
1.50 – 1.75
(NOTE 4)
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.25 – 0.50
TYP 5 PLCS
NOTE 3
0.95 BSC
0.90 – 1.30
0.20 BSC
0.00 – 0.15
0.90 – 1.45
DATUM ‘A’
0.35 – 0.55 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. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ)
1.90 BSC
S5 SOT-23 0502
ATTENTION: ORIGINAL SOT23-5L PACKAGE.
MOST SOT23-5L PRODUCTS CONVERTED TO THIN SOT23
PACKAGE, DRAWING # 05-08-1635 AFTER APPROXIMATELY
APRIL 2001 SHIP DATE
S6 Package
6-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1634)
0.62
MAX
2.80 – 3.10
(NOTE 4)
0.95
REF
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.60 – 3.00 1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.25 – 0.50
TYP 6 PLCS
NOTE 3
0.95 BSC
0.90 – 1.30
0.20 BSC
0.90 – 1.45
DATUM ‘A’
0.35 – 0.55 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. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ)
1.90 BSC
0.09 – 0.15
NOTE 3
S6 SOT-23 0502
ATTENTION: ORIGINAL SOT23-6L PACKAGE.
MOST SOT23-6L PRODUCTS CONVERTED TO THIN SOT23
PACKAGE, DRAWING # 05-08-1636 AFTER APPROXIMATELY
APRIL 2001 SHIP DATE
2050fa
10
LTC2050/LTC2050HV
U
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
× 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
2050fa
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.
11
LTC2050/LTC2050HV
U
TYPICAL APPLICATIONS
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
+
RSET
+
10k
1.235V
IOUT = ———
RSET
LTC2050
4
–
RSET
5
2
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
±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 Ouptput
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
LTC1150
2050fa
12
Linear Technology Corporation
LT/TP 0503 1K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1999