LINEAR TECHNOLOGY LTC2053, LTC2053-SYNC Technical data
FEATURES
LTC2053/LTC2053-SYNC
Precision, Rail-to-Rail,
Zero-Drift, Resistor-Programmable
Instrumentation Amplifier
U
DESCRIPTIO
■
116dB CMRR Independent of Gain
■
Maximum Offset Voltage: 10µV
■
Maximum Offset Voltage Drift: 50nV/°C
■
Rail-to-Rail Input
■
Rail-to-Rail Output
■
2-Resistor Programmable Gain
■
Supply Operation: 2.7V to ±5.5V
■
Typical Noise: 2.5µV
■
Typical Supply Current: 750µA
■
LTC2053-SYNC Allows Synchronization to
(0.01Hz to 10Hz)
P-P
External Clock
■
Available in MS8 and 3mm × 3mm × 0.8mm
DFN Packages
U
APPLICATIO S
■
Thermocouple Amplifiers
■
Electronic Scales
■
Medical Instrumentation
■
Strain Gauge Amplifiers
■
High Resolution Data Acquisition
The LTC®2053 is a high precision instrumentation amplifier. The CMRR is typically 116dB with a single or dual 5V
supply and is independent of gain. The input offset voltage
is guaranteed below 10µV with a temperature drift of less
than 50nV/°C. The LTC2053 is easy to use; the gain is
adjustable with two external resistors, like a traditional
op amp.
The LTC2053 uses charge balanced sampled data techniques to convert a differential input voltage into a single
ended signal that is in turn amplified by a zero-drift
operational amplifier.
The differential inputs operate from rail-to-rail and the
single ended output swings from rail-to-rail. The LTC2053
can be used in single supply applications, as low as 2.7V.
It can also be used with dual ±5.5V supplies. The LTC2053
requires no external clock, while the LTC2053-SYNC has
a CLK pin to synchronize to an external clock.
The LTC2053 is available in an MS8 surface mount package. For space limited applications, the LTC2053 is available in a 3mm × 3mm × 0.8mm dual fine pitch leadless
package (DFN).
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Differential Bridge Amplifier
3V
0.1µF
R < 10k
2
3
8
–
LTC2053
+
1, 4
6
R2 10k
5
R1
10Ω
7
0.1µF
U
OUT
GAIN = 1+
2053 TA01
Typical Input Referred Offset vs Input
Common Mode Voltage (VS = 3V)
15
VS = 3V
= 0V
V
REF
= 25°C
T
10
A
5
0
R2
R1
–5
INPUT OFFSET VOLTAGE (µV)
–10
–15
0
1.0 1.5 2.0
0.5
INPUT COMMON MODE VOLTAGE (V)
G = 1000
G = 10
G = 100
G = 1
2.5 3.0
2053 TA01b
2053syncfb
1
LTC2053/LTC2053-SYNC
WW
W
U
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V–) ............................... 11V
Input Current ...................................................... ±10mA
+
⏐V
⏐V
IN
IN
– V
–
– V
⏐ ........................................................ 5.5V
REF
⏐ ........................................................ 5.5V
REF
Output Short Circuit Duration .......................... Indefinite
Operating Temperature Range
LTC2053C, LTC2053C-SYNC................... 0°C to 70°C
UUW
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
LTC2053CMS8
†
EN/CLK
1
2
–IN
3
+IN
–
4
V
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
= 150°C, θJA = 200°C/W
JMAX
†
PIN 1 IS EN ON LTC2053,
CLK ON LTC2053-SYNC
TOP VIEW
+
8
V
7
OUT
6
RG
5
REF
LTC2053IMS8
LTC2053HMS8
LTC2053CMS8-SYNC
LTC2053IMS8-SYNC
MS8 PART MARKING
LTVT
LTJY
LTAFB
LTC2053I, LTC2053I-SYNC ................ – 40°C to 85°C
LTC2053H ........................................ –40°C to 125°C
Storage Temperature Range
MS8 Package ................................... – 65°C to 150°C
DD Package ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TOP VIEW
+
1
EN
–IN
2
+IN
3
–
V
4
8-LEAD (3mm × 3mm) PLASTIC DFN
DD PACKAGE
T
= 125°C, θJA = 160°C/W
JMAX
UNDERSIDE METAL INTERNALLY
CONNECTED TO V
(PCB CONNECTION OPTIONAL)
8
V
OUT
7
RG
6
REF
5
–
ORDER PART NUMBER
LTC2053CDD
LTC2053IDD
LTC2053HDD
DD PART MARKING
*LAEQ
*LTBNP
*The temperature grade (C, I, or H) is indicated on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, REF = 200mV. Output voltage swing is referenced
to V–. All other specifications reference the OUT pin to the REF pin.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain Error AV = 1 ● 0.001 0.01 %
Gain Nonlinearity AV = 1, LTC2053 ● 3 12 ppm
= 1, LTC2053-SYNC ● 3 15 ppm
A
V
Input Offset Voltage (Note 2) VCM = 200mV –5 ±10 µV
Average Input Offset Drift (Note 2) TA = –40°C to 85°C ● ±50 nV/°C
= 85°C to 125°C ● –1 –2.5 µV/°C
T
A
Average Input Bias Current (Note 3) VCM = 1.2V ● 410 nA
Average Input Offset Current (Note 3) VCM = 1.2V ● 13 nA
Input Noise Voltage DC to 10Hz 2.5 µV
Common Mode Rejection Ratio AV = 1, VCM = 0V to 3V, LTC2053C, LTC2053C-SYNC ● 100 113 dB
(Notes 4, 5) A
= 1, VCM = 0.1V to 2.9V, LTC2053I, LTC2053I-SYNC ● 100 113 dB
V
A
= 1, VCM = 0V to 3V, LTC2053I, LTC2053I-SYNC ● 95 113 dB
V
= 1, VCM = 0.1V to 2.9V, LTC2053H ● 100 dB
A
V
= 1, VCM = 0V to 3V, LTC2053H ● 85 dB
A
V
The ● denotes the specifications which apply over the full operating
P-P
2053syncfb
2
LTC2053/LTC2053-SYNC
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
–
to V
. All other specifications reference the OUT pin to the REF pin.
The ● denotes the specifications which apply over the full operating
= 25°C. V+ = 3V, V– = 0V, REF = 200mV. Output voltage swing is referenced
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply Rejection Ratio (Note 6) VS = 2.7V to 6V ● 110 116 dB
Output Voltage Swing High RL = 2k to V
= 10k to V
R
L
–
–
● 2.85 2.94 V
● 2.95 2.98 V
Output Voltage Swing Low ● 20 mV
Supply Current No Load ● 0.75 1 mA
Supply Current, Shutdown VEN ≥ 2.5V, LTC2053 Only 10 µA
EN/CLK Pin Input Low Voltage, V
EN/CLK Pin Input High Voltage, V
IL
IH
EN/CLK Pin Input Current V
EN/CLK
= V
2.5 V
–
–0.5 – 10 µA
0.5 V
Internal Op Amp Gain Bandwidth 200 kHz
Slew Rate 0.2 V/µs
Internal Sampling Frequency 3kHz
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V+ = 5V,
V– = 0V, REF = 200mV. Output voltage swing is referenced to V–. All other specifications reference the OUT pin to the REF pin.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain Error AV = 1 ● 0.001 0.01 %
Gain Nonlinearity AV = 1 ● 3 10 ppm
Input Offset Voltage (Note 2) VCM = 200mV –5 ±10 µV
Average Input Offset Drift (Note 2) TA = – 40°C to 85°C ● ±50 nV/°C
= 85°C to 125°C ● –1 –2.5 µV/°C
T
A
Average Input Bias Current (Note 3) VCM = 1.2V ● 410 nA
Average Input Offset Current (Note 3) VCM = 1.2V ● 13 nA
Common Mode Rejection Ratio AV = 1, VCM = 0V to 5V, LTC2053C ● 105 116 dB
(Notes 4, 5) A
Power Supply Rejection Ratio (Note 6) VS = 2.7V to 6V ● 110 116 dB
Output Voltage Swing High RL = 2k to V
Output Voltage Swing Low ● 20 mV
Supply Current No Load ● 0.85 1.1 mA
Supply Current, Shutdown VEN ≥ 4.5V, LTC2053 Only 10 µA
EN/CLK Pin Input Low Voltage, V
EN/CLK Pin Input High Voltage, V
IL
IH
EN/CLK Pin Input Current V
Internal Op Amp Gain Bandwidth 200 kHz
Slew Rate 0.2 V/µs
Internal Sampling Frequency 3kHz
= 1, VCM = 0V to 5V, LTC2053C-SYNC ● 100 116 dB
V
= 1, VCM = 0.1V to 4.9V, LTC2053I ● 105 116 dB
A
V
A
= 1, VCM = 0.1V to 4.9V, LTC2053I-SYNC ● 100 116 dB
V
= 1, VCM = 0V to 5V, LTC2053I, LTC2053I-SYNC ● 95 116 dB
A
V
= 1, VCM = 0.1V to 4.9V, LTC2053H ● 100 dB
A
V
A
= 1, VCM = 0V to 5V, LTC2053H ● 85 dB
V
= 10k to V
R
L
–
–
● 4.85 4.94 V
● 4.95 4.98 V
0.5 V
4.5 V
–
EN/CLK
= V
–1 –10 µA
2053syncfb
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LTC2053/LTC2053-SYNC
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain Error AV = 1 ● 0.001 0.01 %
Gain Nonlinearity AV = 1 ● 3 10 ppm
Input Offset Voltage (Note 2) VCM = 0V 10 ±20 µV
Average Input Offset Drift (Note 2) TA = –40°C to 85°C ● ±50 nV/°C
= 85°C to 125°C ● –1 –2.5 µV/°C
T
A
Average Input Bias Current (Note 3) VCM = 1V ● 410 nA
Average Input Offset Current (Note 3) VCM = 1V ● 13 nA
Common Mode Rejection Ratio AV = 1, VCM = – 5V to 5V, LTC2053C ● 105 118 dB
(Notes 4, 5) A
(Notes 4, 5) A
Power Supply Rejection Ratio (Note 6) VS = 2.7V to 11V ● 110 116 dB
Maximum Output Voltage Swing RL = 2k to GND, C and I Grades ● ± 4.5 ±4.8 V
Supply Current No Load ● 0.95 1.3 mA
Supply Current, Shutdown VEN ≥ 4.5V, LTC2053 Only 20 µA
EN Pin Input Low Voltage, V
CLK Pin Input Low Voltage, V
EN/CLK Pin Input High Voltage, V
EN/CLK Pin Input Current V
Internal Op Amp Gain Bandwidth 200 kHz
Slew Rate 0.2 V/µs
Internal Sampling Frequency 3kHz
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels in high speed automatic test
systems. V
capability.
Note 3: If the total source resistance is less than 10k, no DC errors result
from the input bias currents or the mismatch of the input bias currents or
the mismatch of the resistances connected to –IN and +IN .
is measured to a limit determined by test equipment
OS
IL
IL
IH
= 1, VCM = – 5V to 5V, LTC2053C-SYNC ● 100 118 dB
V
= 1, VCM = – 4.9V to 4.9V, LTC2053I ● 105 118 dB
V
A
= 1, VCM = – 4.9V to 4.9V, LTC2053I-SYNC ● 100 118 dB
V
= 1, VCM = – 5V to 5V, LTC2053I, LTC2053I-SYNC ● 95 118 dB
A
V
= 1, VCM = –4.9V to 4.9V, LTC2053H ● 100 dB
A
V
A
= 1, VCM = –5V to 5V, LTC2053H ● 90 dB
V
= 10k to GND, All Grades ● ± 4.6 ±4.9 V
R
L
= 2k to GND, LTC2053H Only ● ± 4.4 ±4.8 V
R
L
–
= V
EN/CLK
The ● denotes the specifications which apply over the full operating
= 25°C. V+ = 5V, V– = –5V, REF = 0V.
A
4.5 V
–3 –20 µA
Note 4: The CMRR with a voltage gain, A
Note 5: At temperatures above 70°C, the common mode rejection ratio
lowers when the common mode input voltage is within 100mV of the
supply rails.
Note 6: The power supply rejection ratio (PSRR) measurement accuracy
depends on the proximity of the power supply bypass capacitor to the
device under test. Because of this, the PSRR is 100% tested to relaxed
limits at final test. However, their values are guaranteed by design to meet
the data sheet limits.
, larger than 10 is 120dB (typ).
V
– 4.5 V
0.5 V
4
2053syncfb
LTC2053/LTC2053-SYNC
INPUT COMMON MODE VOLTAGE (V)
–5
INPUT OFFSET VOLTAGE (µV)
20
15
10
5
0
–5
–10
–15
–20
–3
–1 1 3
2053 G03
5
VS = ±5V
V
REF
= 0V
T
A
= 25°C
G=1000
G=10
G=1
G=100
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Input Offset Voltage vs Input
Common Mode Voltage
15
VS = 3V
= 0V
V
REF
= 25°C
T
10
A
5
0
–5
INPUT OFFSET VOLTAGE (µV)
–10
–15
0
1.0 1.5 2.0
0.5
INPUT COMMON MODE VOLTAGE (V)
Input Offset Voltage vs Input
Common Mode Voltage
20
VS = 3V
= 0V
V
REF
15
G = 10
10
5
0
–5
–10
INPUT OFFSET VOLTAGE (µV)
–15
–20
0
TA = 25°C
TA = –55°C
1.0 1.5 2.0 2.5 3.0
0.5
INPUT COMMON MODE VOLTAGE (V)
G = 1000
G = 10
TA = 85°C
G = 100
G = 1
2.5 3.0
2053 G01
TA = 70°C
2053 G04
Input Offset Voltage vs Input
Common Mode Voltage
15
VS = 5V
= 0V
V
REF
= 25°C
T
10
A
5
0
–5
INPUT OFFSET VOLTAGE (µV)
–10
–15
0
INPUT COMMON MODE VOLTAGE (V)
234
1
Input Offset Voltage vs Input
Common Mode Voltage
20
VS = 5V
= 0V
V
REF
15
G = 10
10
5
0
–5
–10
INPUT OFFSET VOLTAGE (µV)
–15
–20
0
TA = 85°C
TA = 25°C
234
1
INPUT COMMON MODE VOLTAGE (V)
G = 1000
G = 100
G = 10
TA = 70°C
TA = –55°C
G = 1
2053 G02
2053 G05
Input Offset Voltage vs Input
Common Mode Voltage
5
Input Offset Voltage vs Input
Common Mode Voltage
20
VS = ±5V
= 0V
V
REF
15
G = 10
10
5
0
–5
–10
INPUT OFFSET VOLTAGE (µV)
–15
–20
5
–5
INPUT COMMON MODE VOLTAGE (V)
TA = 25°C
–3
TA = 70°C
TA = –55°C
–1 1 3
TA = 85°C
5
2053 G06
Input Offset Voltage vs Input
Common Mode Voltage
60
H-GRADE PARTS
= 3V
V
S
= 0V
V
40
REF
G = 10
20
0
–20
INPUT OFFSET VOLTAGE (µV)
–40
–60
0
TA = 25°C
1.0 1.5 2.0 2.5 3.0
0.5
INPUT COMMON MODE VOLTAGE (V)
TA = 85°C
TA = 125°C
2053 G07
Input Offset Voltage vs Input
Common Mode Voltage
60
H-GRADE PARTS
= 5V
V
S
= 0V
V
40
REF
G = 10
20
0
–20
INPUT OFFSET VOLTAGE (µV)
–40
–60
0
0
INPUT COMMON MODE VOLTAGE (V)
TA = 25°C
TA = 125°C
2345
1
TA = 85°C
2053 G08
Input Offset Voltage vs Input
Common Mode Voltage
100
H-GRADE PARTS
80
= ±5V
V
S
= 0V
V
REF
60
G = 10
40
20
–20
–40
–60
INPUT OFFSET VOLTAGE (µV)
–80
–100
0
–5
–3
INPUT COMMON MODE VOLTAGE (V)
TA = 25°C
TA = 125°C
–1 1 3
TA = 85°C
5
2053 G09
2053syncfb
5
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