LTC2054/LTC2055
Single/Dual Micropower
Zero-Drift Operational Amplifiers
DESCRIPTION
FEATURES
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Supply Current 150μA (Max per Amplifier)
Guaranteed from –40°C to 85°C
Offset Voltage 3μV (Max, –40°C to 85°C)
Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C)
Guaranteed Specifications from –55°C to 150°C
(LTC2054MP)
Common Mode Input Range from V – to V + – 0.5V
Output Swings Rail-to-Rail
Voltage Gain: 140dB (Typ)
PSRR and CMRR: 130dB (Typ)
Input Bias Current: 1pA (Typ, 25°C)
Noise: 1.6μVP-P (0.01Hz to 10Hz Typ)
Supply Operation:
2.7V to 6V (LTC2054/LTC2055)
2.7V to ±5.5V (LTC2054HV/LTC2055HV)
Low Profile (1mm) TSOT-23, MS8 and
3mm × 3mm × 0.8mm DFN Packages
APPLICATIONS
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The LTC®2054/LTC2055 are low power, low noise, single/
dual, zero-drift operational amplifiers with an extended
temperature version (LTC2054MP) that has guaranteed
specifications from –55°C to 150°C. They are available
in TSOT-23 (ThinSOT™) and MS8 packages. For space
limited applications, the LTC2055 is also available in a
3mm × 3mm × 0.8mm dual fine pitch leadless package
(DFN). They operate from a single 2.7V minimum supply
and support ± 5V applications. The current consumption
is typically 150μA for the LTC2054 and 130μA/amp for
the LTC2055.
The LTC2054/LTC2055, despite their miniature size, feature
uncompromising DC performance. The maximum input
offset voltage and offset drift are 3.0μV and 30nV/°C over
the –40°C to 85°C industrial temperature range. The almost
zero DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of 130dB (typ).
The input common mode voltage ranges from the negative
supply up to typically 0.5V below the positive supply. The
open-loop gain is typically 140dB. The LTC2054/LTC2055
also feature a 1.6μVP-P DC to 10Hz noise and a 500kHz
gain-bandwidth product.
Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate RC Active Filters
Low Side Current Sense
Battery-Powered Systems
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.
TYPICAL APPLICATION
VOS vs Temperature
–48V Low Side Precision Current Sense
10
100Ω
1%
0.01μF
–
39k
LTC2054
+
–48V SUPPLY
LTC2054
+
VS = ±5V
6
4
–
VOUT = 100VSENSE
2
0
–2
–4
0.1μF
–6
–8
0.003Ω
1% 3W
–
8
5V
100Ω
BZX84C5V1
VZ = 5.1
10k
1%
0.1μF
VOS (μV)
Q1
ZETEX
ZVN3320F
+
ISENSE, VSENSE
20545 TA01
–48V LOAD
–10
–55
–20
15
50
85
120
155
TEMPERATURE (°C)
20545 TA01b
20545fc
1
LTC2054/LTC2055
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V + to V –)
LTC2054/LTC2055 ...................................................7V
LTC2054HV/LTC2055HV........................................12V
Input Voltage .......................(V + + 0.3V) to (V S– – 0.3V)
Input Current........................................................±10mA
Output Short-Circuit Duration ......................... Indefinite
Specified Temperature Range (Note 2)
LTC2054C/LTC2055C ............................... 0°C to 70°C
LTC2054I/LTC2055I.............................. –40°C to 85°C
LTC2054H/LTC2055H .........................–40°C to 125°C
LTC2054MP .......................................–55°C to 150°C
Storage Temperature Range.................. –65°C to 150°C
DD Package .......................................–65°C to 125°C
Lead Temperature (Soldering, 10 sec)
TSOT23 and MS8 Packages ............................. 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT 1
5 V+
–2
V
+IN 3
4 –IN
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 250°C/W
OUT A
1
8
V+
–IN A
2
7
OUT B
+IN A
3
6
–IN B
V–
4
5
+IN B
TOP VIEW
OUT A
–IN A
+IN A
V–
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
UNDERSIDE METAL INTERNALLY
CONNECTED TO V–
(PCB CONNECTION OPTIONAL)
1
2
3
4
8
7
6
5
V+
OUT B
–IN B
+IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 200°C/W
TJMAX = 125°C, θJA = 160°C/W (NOTE 5)
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LTC2054CS5#PBF
LTC2054CS5#TRPBF
LTAGB
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2054HVCS5#PBF
LTC2054HVCS5#TRPBF
LTAGD
5-Lead Plastic TSOT-23
0°C to 70°C
LTC2054IS5#PBF
LTC2054IS5#TRPBF
LTAGB
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2054HVIS5#PBF
LTC2054HVIS5#TRPBF
LTAGD
5-Lead Plastic TSOT-23
–40°C to 85°C
LTC2054HS5#PBF
LTC2054HS5#TRPBF
LTAGB
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2054HVHS5#PBF
LTC2054HVHS5#TRPBF
LTAGD
5-Lead Plastic TSOT-23
–40°C to 125°C
LTC2055CDD#PBF
LTC2055CDD#TRPBF
LBCW
8-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
LTC2055HVCDD#PBF
LTC2055HVCDD#TRPBF
LBCX
8-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
LTC2055IDD#PBF
LTC2055IDD#TRPBF
LBCW
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC2055HVIDD#PBF
LTC2055HVIDD#TRPBF
LBCX
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC2055HDD#PBF
LTC2055HDD#TRPBF
LBCW
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC2055HVHDD#PBF
LTC2055HVHDD#TRPBF
LBCX
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC2055CMS8#PBF
LTC2054CMS8#TRPBF
LTBCR
8-Lead Plastic MSOP
0°C to 70°C
LTC2055HVCMS8#PBF
LTC2055HVCMS8#TRPBF
LTBCT
8-Lead Plastic MSOP
0°C to 70°C
LTC2055IMS8#PBF
LTC2055IMS8#TRPBF
LTBCR
8-Lead Plastic MSOP
–40°C to 85°C
20545fc
2
LTC2054/LTC2055
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LTC2055HVIMS8#PBF
LTC2055HVIMS8#TRPBF
LTBCT
8-Lead Plastic MSOP
–40°C to 85°C
LTC2055HMS8#PBF
LTC2055HMS8#TRPBF
LTBCR
8-Lead Plastic MSOP
–40°C to 125°C
LTC2055HVHMS8#PBF
LTC2055HVHMS8#TRPBF
LTBCT
8-Lead Plastic MSOP
–40°C to 125°C
LTC2054MPS5#PBF
LTC2054MPS5#TRPBF
LTFFF
5-Lead Plastic TSOT-23
–55°C to 150°C
LTC2054HVMPS5#PBF
LTC2054HVMPS5#TRPBF
LTFFG
5-Lead Plastic TSOT-23
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
ELECTRICAL CHARACTERISTICS
(LTC2054/LTC2055) The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 5V unless otherwise noted. (Note 2)
LTC2054C/LTC2055C
LTC2054I/LTC2055I
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
LTC2054H/LTC2055H
MIN
TYP
MAX
UNITS
IS
Supply Current (LTC2054)
No Load
●
140
175
140
180
μA
IS
Supply Current Per Amplifier
(LTC2055)
No Load
●
130
150
130
155
μA
VOS
Input Offset Voltage
(Note 3)
±0.5
±3
± 0.5
±3
μV
ΔVOS/ΔT
Average Input Offset Drift
(Note 3)
0.02
±0.03
0.02
± 0.05
IB
Input Bias Current
●
Long-Term Offset Drift
IOS
(Note 4)
50
50
±1
±1
●
Input Offset Current
±150
(Note 4)
±2
●
en
Input Noise Voltage
RS = 100Ω, DC to 1Hz
RS = 100Ω, DC to 10Hz
CMRR
Common Mode Rejection Ratio
VCM = GND to V + – 0.7V
VS = 3V
115
110
130
●
VCM = GND to V + – 0.7V
VS = 5V
●
120
115
●
PSRR
AVOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing High
± 3000
pA
pA
± 700
pA
pA
0.6
1.6
μVP-P
μVP-P
115
110
130
dB
dB
130
120
115
130
dB
dB
120
115
130
120
115
130
dB
dB
120
115
135
120
115
135
●
dB
dB
125
120
140
125
120
140
●
dB
dB
RL = 5k to GND, VS = 3V
RL = 5k to GND, VS = 3V
2.87
2.85
2.89
2.87
2.84
2.89
●
V
V
RL = 5k to GND, VS = 5V
RL = 5k to GND, VS = 5V
4.80
4.75
4.83
4.80
4.70
4.83
●
V
V
RL = 100k to GND, VS = 3V
RL = 100k to GND, VS = 3V
2.98
2.975
2.99
2.98
2.97
2.99
●
V
V
RL = 100k to GND, VS = 5V
RL = 100k to GND, VS = 5V
4.985
4.980
4.99
4.985
4.970
4.99
●
V
V
VS = 2.7V to 6V
RL = 100k, VS = 3V, VOUT = VS /2
RL = 100k, VS = 5V, VOUT = VS /2
VOUT
nV/√mo
±2
±300
0.6
1.6
μV/°C
20545fc
3
LTC2054/LTC2055
ELECTRICAL CHARACTERISTICS
(LTC2054/LTC2055) The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 5V unless otherwise noted. (Note 2)
LTC2054C/LTC2055C
LTC2054I/LTC2055I
SYMBOL
PARAMETER
CONDITIONS
VOUT
Output Voltage Swing Low
RL = 5k to GND, VS = 3V
RL = 5k to GND, VS = 3V
MIN
●
RL = 5k to GND, VS = 5V
RL = 5k to GND, VS = 5V
●
RL = 100k to GND, VS = 3V
RL = 100k to GND, VS = 3V
●
RL = 100k to GND, VS = 5V
RL = 100k to GND, VS = 5V
●
LTC2054H/LTC2055H
TYP
MAX
TYP
MAX
2
8
10
MIN
3
8
10
UNITS
mV
mV
2
8
10
3
8
10
mV
mV
2
8
10
3
8
10
mV
mV
2
8
10
3
8
10
mV
mV
SR
Slew Rate
0.5
0.5
V/μs
GBW
Gain Bandwidth Product
500
500
kHz
fS
Internal Sampling Frequency
1
1
kHz
(LTC2054HV/LTC2055HV) The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 2)
LTC2054HVC/LTC2055HVC
LTC2054HVI/LTC2055HVI
SYMBOL
PARAMETER
CONDITIONS
IS
Supply Current
No Load (LTC2054)
●
MIN
IS
Supply Current (Per Amplifier)
No Load (LTC2055)
●
VOS
Input Offset Voltage
(Note 3)
ΔVOS/ΔT
Average Input Offset Drift
(Note 3)
IB
Input Bias Current
●
Long-Term Offset Drift
IOS
(Note 4)
Input Offset Current
CMRR
Common Mode Rejection Ratio
VCM = GND to V + – 0.9
Power Supply Rejection Ratio
Large-Signal Voltage Gain
VS = 2.7V to 11V
RL = 100k, VOUT = GND
Maximum Output Voltage Swing RL = 5k to GND
RL = 5k to GND
RL = 100k to GND
RL = 100k to GND
MIN
TYP
MAX
UNITS
175
215
μA
150
180
150
185
μA
±0.5
±5
±0.5
±5
μV
0.025
±0.03
0.025
± 0.05
50
50
±3
±3
±6
●
RS = 100Ω, DC to 1Hz
RS = 100Ω, DC to 10Hz
VOUT
210
±150
(Note 4)
Input Noise Voltage
AVOL
MAX
175
●
en
PSRR
TYP
LTC2054HVH/LTC2055HVH
nV/√mo
± 3000
pA
pA
± 700
pA
pA
±6
±300
0.6
1.6
μV/°C
0.6
1.6
μVP-P
μVP-P
120
115
130
120
115
130
●
dB
dB
120
115
130
120
115
130
●
dB
dB
125
120
140
125
120
140
●
dB
dB
± 4.78
±4.75
± 4.82
±4.78
±4.70
±4.82
●
V
V
± 4.98
±4.975
± 4.99
±4.98
±4.97
±4.99
●
V
V
SR
Slew Rate
0.5
0.5
V/μs
GBW
Gain Bandwidth Product
500
500
kHz
fS
Internal Sampling Frequency
1
1
kHz
20545fc
4
LTC2054/LTC2055
ELECTRICAL CHARACTERISTICS
(LTC2054MP) The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 5V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
IS
Supply Current
No Load
●
VOS
Input Offset Voltage
(Note 3)
(Note 3) –55°C to 135°C
●
Average Input Offset Drift
(Note 3)
●
ΔVOS /ΔT
MIN
Input Bias Current
IOS
Input Offset Current
(Note 4)
(Note 4)
μA
±10
±8
μV
μV
Common Mode Rejection Ratio
VCM = GND to V + – 0.7V
VS = 3V
●
VCM = GND to V + – 0.7V
VS = 5V
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing Low
μV/°C
nV/√mo
± 12
pA
nA
±5
pA
nA
0.6
1.6
μVP-P
μVP-P
115
105
130
dB
dB
120
110
130
●
dB
dB
120
110
130
●
dB
dB
120
110
135
●
dB
dB
125
115
140
●
dB
dB
RL = 5k to GND, VS = 3V
RL = 5k to GND, VS = 3V
2.87
2.84
2.89
●
V
V
RL = 5k to GND, VS = 5V
RL = 5k to GND, VS = 5V
4.80
4.70
4.83
●
V
V
RL = 100k to GND, VS = 3V
RL = 100k to GND, VS = 3V
2.98
2.97
2.99
●
V
V
RL = 100k to GND, VS = 5V
RL = 100k to GND, VS = 5V
4.985
4.970
4.99
●
V
V
RL = 5k to GND, VS = 3V
RL = 5k to GND, VS = 3V
●
RL = 5k to GND, VS = 5V
RL = 5k to GND, VS = 5V
●
RL = 100k to GND, VS = 3V
RL = 100k to GND, VS = 3V
●
RL = 100k to GND, VS = 5V
RL = 100k to GND, VS = 5V
●
VS = 2.7V to 6V
RL = 100k, VS = 3V, VOUT = VS/2
RL = 100k, VS = 5V, VOUT = VS/2
Output Voltage Swing High
± 0.1
±2
CMRR
VOUT
190
●
RS = 100Ω, DC to 1Hz
RS = 100Ω, DC to 10Hz
VOUT
145
±1
●
Input Noise Voltage
AVOL
UNITS
50
en
PSRR
MAX
0.04
Long-Term Offset Drift
IB
TYP
3
8
10
mV
mV
3
8
10
mV
mV
3
8
10
mV
mV
3
8
10
mV
mV
SR
Slew Rate
0.5
V/μs
GBW
Gain Bandwidth Product
500
kHz
fS
Internal Sampling Frequency
1
kHz
20545fc
5
LTC2054/LTC2055
ELECTRICAL CHARACTERISTICS
(LTC2054HVMP) The ● denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
IS
Supply Current
No Load
●
VOS
Input Offset Voltage
(Note 3)
●
ΔVOS /ΔT
Average Input Offset Drift
(Note 3)
●
IB
Input Bias Current
175
0.05
Long-Term Offset Drift
IOS
(Note 4)
Input Noise Voltage
RS = 100Ω, DC to 1Hz
RS = 100Ω, DC to 10Hz
CMRR
Common Mode Rejection Ratio
VCM = GND to V + – 0.9
AVOL
VOUT
SR
Large-Signal Voltage Gain
Maximum Output Voltage Swing
220
μA
± 10
μV
± 0.1
μV/°C
nV/√mo
± 12
pA
nA
±5
pA
nA
±6
●
Power Supply Rejection Ratio
UNITS
±3
●
Input Offset Current
MAX
50
(Note 4)
en
PSRR
TYP
0.6
1.6
μVP-P
μVP-P
120
110
130
●
dB
dB
120
110
130
●
dB
dB
125
115
140
●
dB
dB
RL = 5k to GND
RL = 5k to GND
±4.78
±4.675
±4.82
●
V
V
RL = 100k to GND
RL = 100k to GND
±4.98
±4.965
±4.99
●
V
V
VS = 2.7V to 11V
RL = 100k, VOUT = GND
Slew Rate
0.5
GBW
Gain Bandwidth Product
500
kHz
fS
Internal Sampling Frequency
1
kHz
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: The LTC2054/LTC2055 are designed, characterized and expected to
meet the extended temperature limits of –40°C and 125°C. The LTC2054C/
LTC2055C/LTC2054HVC/LTC2055HVC are guaranteed to meet the
temperature limits of 0°C and 70°C. The LTC2054I/LTC2055I/LTC2054HVI/
LTC2055HVI are guaranteed to meet temperature limits of –40°C and
85°C. The LTC2054H/LTC2055H and LTC2054HVH/LTC2055HVH are
guaranteed to meet the temperature limits of –40°C and 125°C. The
LTC2054MP/LTC2054HVMP are guaranteed to meet the temperature limits
of –55°C and 150°C.
V/μs
Note 3: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels during automated testing.
Note 4: Limit is determined by high speed automated test capability. See
Typical Characteristic curves for actual typical performance. For tighter
specifications, please consult Linear Technology Marketing.
Note 5: The θJA specified for the DD package is with minimal PCB heat
spreading metal. Using expanded metal area on all layers of a board
reduces this value.
20545fc
6
LTC2054/LTC2055
TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
DC CMRR
vs Common Mode Input Range
140
PSRR vs Frequency
140
140
VS = 3V OR 5V
VCM = 0.5VP-P
120
VS = ±2.5V
120
120
100
100
80
60
40
80
80
PSRR (dB)
CMRR (dB)
CMRR (dB)
100
VS = 5V
VS = 3V
60
60
–PSRR
40
20
40
+PSRR
0
20
20
0
0
10
100
1k
FREQUENCY (Hz)
10k
100k
–40
0
2
1
3
OUTPUT SWING (V)
0
VS = ±1.5V
–2
VS = ±2.5V
–3
–4
0
2
4
LOAD RESISTANCE (kΩ)
V – + 1.5
V – + 1.0
VS = ±5V
VS = ±2.5V
V–
6
1
2
4
5
3
0
SOURCING OR SINKING LOAD CURRENT (mA)
20545 G04
PHASE
VS = ±2.5V
VIN = 0.5VP-P
–80
RL = 10kΩ
80
40
–140
20
–160
0
PHASE (DEG)
–120
GAIN
–40
10
ISINK
VOUT = V+
2
0
–2
–4
–6
ISOURCE
VOUT = V–
–8
–10
3
4
5
7
8
9 10 11
6
TOTAL SUPPLY VOLTAGE, V+ TO V– (V)
20545 G06
VS = ±5V
10000
–100
60
–20
4
Input Bias Current vs Temperature
100000
–60
100
6
20545 G05
Gain/Phase vs Frequency
120
V+ – 1.0
V+ – 1.5
V – + 0.5 VS = ±1.5V
VS = ±5V
RL TO GND
VS = ±1.5V
BIAS CURRENT (pA)
–5
GAIN (dB)
OUTPUT SWING (V)
VS = ±5V
VS = ±1.5V
–1
V+
V+ – 0.5
VS = ±2.5V
1
1M
Short-Circuit Output Current
vs Supply Voltage
VS = ±2.5V
2
100k
20545 G03
Output Swing
vs Load Current
VS = ±5V
3
1k
10k
FREQUENCY (Hz)
20545 G02
Output Voltage Swing
vs Load Resistance
4
100
10
VCM (V)
20545 G01
5
5
4
SHORT-CIRCUIT OUTPUT CURRENT, IOUT (mA)
1
–20
TA = 25°C
1000
100
–180
10
CL = 30pF
CL = 50pF
CL = 100pF
100
1k
10k 100k
FREQUENCY (Hz)
–200
1M
–220
10M
20545 G07
1
–55
–20
85
50
15
TEMPERATURE (°C)
120
155
20545 G08
20545fc
7
LTC2054/LTC2055
TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current
vs Input Common Mode Voltage
VOS vs Temperature
7
10000
VS = ±5V
6
TA = 155°C
4
3
2
1
1
TA = 125°C
BIAS CURRENT (pA)
VOS (μV)
VSUPPLY = ±2.5V
1000
5
Transient Response
OUTPUT (V)
8
100
10
TA = 85°C
TA = 70°C
0
0
–1
1
TA = –55°C
–1
–2
–55
–20
85
50
15
TEMPERATURE (°C)
120
TA = 25°C
TA = –40°C
0.1
–2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5
COMMON MODE VOLTAGE (V)
155
20545 G09
AV = 1
10μs/DIV
RL = 100k
CL = 50pF
VS = ±2.5V
VIN = 10kHz 2VP-P
2
20545 G10
Output Overload Recovery
Common Mode Input Range
Output Overload Recovery
OUTPUT (V)
OUTPUT (V)
INPUT (V)
0
0
0
0
–2.5
–0.2
9
8
7
6
5
4
3
2
1
0
AV = –100
RL = 100k
VS = ±2.5V
2ms/DIV
20545 G12
225
225
200
200
SUPPLY CURRENT (μA)
250
175
150
125
100
75
150
75
25
25
2
3 4
5 6 7 8
TOTAL SUPPLY VOLTAGE (V)
9
10
VS = ±1.5V
100
50
1
VS = ±2.5V
125
50
0
VS = ±5V
175
0
–55
–20
15
50
85
120
155
TEMPERATURE (°C)
20545 G15
0
1
2 3 4 5 6 7 8 9 10 11
TOTAL SUPPLY VOLTAGE (V)
20545 G14
20545 G13
Supply Current vs Temperature
Supply Current vs Supply Voltage
250
0
2ms/DIV
20545 G16
INPUT REFFERED VOLTAGE NOISE DENSITY (nV/√Hz)
AV = –100
RL = 100k
VS = ±2.5V
SUPPLY CURRENT (μA)
V – = 0V
10
0.2
COMMON MODE VOLTAGE (V)
INPUT (V)
11
2.5
20545 G11
Noise Spectrum
100
90
80
70
60
50
40
30
20
10 AV = 100
VS = ±2.5V
0
100
10
1k
FREQUENCY (Hz)
10k
20545 G17
20545fc
8
LTC2054/LTC2055
TEST CIRCUITS
Electrical Characteristics
Test Circuit
100k
OUTPUT
V+
10Ω
–
LTC2054/55
+
RL
V–
20545 TC01
DC-10Hz Noise Test Circuit
100k
10Ω
–
475k
0.01μF
158k
316k
475k
–
LTC2054/55
+
0.1μF
0.01μF
LT1012
TO X-Y
RECORDER
+
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
20545 TC02
20545fc
9
LTC2054/LTC2055
APPLICATIONS INFORMATION
Clock Feedthrough, Input Bias Current
The LTC2054 and LTC2055 use 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
1.0kHz. 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 LTC2054/
LTC2055.
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 LTC2054/LTC2055 have
an input referred residue clock feedthrough of less then
0.2μVRMS at 1.0kHz.
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, and the resulting voltage spikes
appear 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 10kΩ, this form of clock feedthrough
is 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
DC to 1Hz Noise
0.4μV
20545 F01
10 SEC
DC to 10Hz Noise
1μV
20545 F02
1 SEC
20545fc
10
LTC2054/LTC2055
APPLICATIONS INFORMATION
Voltage Follower with Input Exceeding
the Common Mode Range
cause the second form of clock feedthrough described
above, when averaged, dominate the DC input bias current
of the op amp below 70°C.
2.5V
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 70°C) the leakage current
begins to dominate and both the negative and positive
pins’ input bias currents are in the positive direction (into
the pins).
–
LTC2054/55
1k
OUTPUT
+
100k
±3.75VP
SINE WAVE
–2.5V
20545 F03
Extended Common Mode Range
INPUT (V)
Extended Common Mode Range
The LTC2054/LTC2055 input stage is designed to allow
nearly rail-to-rail input common mode signals. In addition,
signals that extend beyond the allowed input common
mode range do not cause output phase inversion.
2V
0V
OUTPUT (V)
–2V
2V
0V
–2V
AV = 1
500μs/DIV
RL = 100k
VS = ±2.5V
VIN = 500Hz 7.5VP-P
20545 F04
TYPICAL APPLICATIONS
Simple Differential Bridge Amplifier
5V
5V
0.1μF
1μF
LT1790-2.5
499k
4
10kΩ
BRIDGE
–
5
LTC2054HV
3
0.1μF
+
1
AV = 100
2
499k
–5V
20545 TA02
20545fc
11
LTC2054/LTC2055
TYPICAL APPLICATIONS
Ground Referred Precision Current Sources
LT1634-1.25
10k
4
5
–
1
LTC2054
3
+
VOUT
–
1.25V
IOUT = ———
RSET
0 ≤ IOUT ≤ 100μA
(V–) + 1.5V ≤ VOUT ≤ –1V
V+
+
3
2
RSET
RSET
5
+
1
LTC2054
10k
4
–
2
1.25V
IOUT = ———
RSET
+
V–
VOUT
–
0 ≤ IOUT ≤ 100μA
0.2V ≤ VOUT ≤ (V+) – 1.5V
LT1634-1.25
20545 TA03
Instrumentation Amplifier with 100V Common Mode Input Voltage
1k
1M
V+
1M
2
+
VIN
1M
3
–
8
–
1/2
LTC2055HV
+
1
1k
6
4
5
V–
1k
–
1/2
LTC2055HV
7
VOUT
+
OUTPUT OFFSET ≤3mV
FOR 0.1% RESISTORS, CMRR = 54dB
20545 TA04
Gain of 1001 Single Supply Instrumentation Amplifier
C1
0.1μF
R2
1k
R1
1M
–VIN
R4 1M
V+
2
3
–
+
8
1/2
LTC2055
1
R3
1k
4
+VIN
OUTPUT DC OFFSET ≤ 6mV
FOR 0.1% RESISTORS, CMRR = 54dB
6
5
–
1/2
LTC2055
7
VOUT
+
20545 TA05
20545fc
12
LTC2054/LTC2055
PACKAGE DESCRIPTION
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
0.70 p0.05
3.5 p0.05
1.65 p0.05
2.10 p0.05 (2 SIDES)
PACKAGE
OUTLINE
0.25 p 0.05
0.50
BSC
2.38 p0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
3.00 p0.10
(4 SIDES)
R = 0.125
TYP
5
0.40 p 0.10
8
1.65 p 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
(DD8) DFN 0509 REV C
0.200 REF
0.75 p0.05
4
0.25 p 0.05
1
0.50 BSC
2.38 p0.10
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
20545fc
13
LTC2054/LTC2055
PACKAGE DESCRIPTION
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev F)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ± .0015)
TYP
8
7 6 5
0.52
(.0205)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
1
0.53 ± 0.152
(.021 ± .006)
DETAIL “A”
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.1016 ± 0.0508
(.004 ± .002)
MSOP (MS8) 0307 REV F
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
20545fc
14
LTC2054/LTC2055
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
20545fc
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
LTC2054/LTC2055
TYPICAL APPLICATIONS
Low Power, Bidirectional 60V Precision Hi Side Current Sense
POSITIVE SENSE
10mΩ
5
3
BAT54
1
+
–
VSENSE
LTC1754-5
1N4686
3.9VZ
2
10μF
4
100Ω
0.1μF
6
1μF
10μF
100Ω
3
PRECISION
BIDIRECTIONAL
GAIN
OF 125
5
+
1
LTC2054
4
0.1μF
–
2
12.4k
33Ω
2
2N5401
ON 5V
OFF 0V
MPSA42
POWER SUPPLY
(NOTE: POSITIVE
CURRENT SENSE
INCLUDES CIRCUIT
SUPPLY CURRENT)
35.7k
1
PRECISION
BIDIRECTIONAL
HIGH VOLTAGE
LEVEL SHIFT
AND GAIN OF 8
VS–
7
VS+
LT1787HV
8
5
VOUT = 2.5V
+1000* VSENSE
4.7μF
6
2.5V REF
4
20545 TA06
Precision Low Drift Integrator
OPEN
t = tO
S1
Ultra-Precision, Wide Dynamic Range
10Hz Bandwidth Photodiode Amplifier
100k
1Ω
0.15μF
10μF
GAIN = 0.1V/μA
~10pA RESOLUTION
50μA FULL SCALE
5V
VIN
1MΩ
4
4
5
–
LTC2054HV
3
5V
1k
+
t
1
°t
O
VIN (t)
d
10 sec t
ANY
PHOTODIODE
–
LTC2054
3
+
2
–5V
5
2
2k
1
0.01μF
–5V
20545 TA08
20545 TA07
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 Version of the LTC1050
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
LTC2050
Zero-Drift Op Amp
Enhanced Output Drive Capability
LTC2051/LTC2052
Dual/Quad Zero-Drift Op Amp
Dual/Quad Version of the LTC2050 in MS8/GN16 Package
LTC2053
Zero-Drift Instrumentation Amp
Rail-to-Rail Input
20545fc
16 Linear Technology Corporation
LT 0809 REV C • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
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