LTC2053
Precision, Rail-to-Rail
Input and Output, Zero-Drift Instrumentation
Amplifier with Resistor-Programmable Gain
FEATURES
s
s
s
s
s
s
s
s
s
s
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
P-P
(0.01Hz to 10Hz)
Typical Supply Current: 750µA
Available in an MS8 and 3mm
×
3mm
×
0.8mm
DFN Packages
The LTC
®
2053 is a high precision instrumentation ampli-
fier. 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 tech-
niques 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
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.
APPLICATIO S
s
s
s
s
s
Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
TYPICAL APPLICATIO
3V
Differential Bridge Amplifier
0.1µF
R < 10k
2
8
INPUT OFFSET VOLTAGE (µV)
Typical Input Referred Offset vs Input
Common Mode Voltage (V
S
= 3V)
15
10
5
0
–5
G = 10
–10
G=1
–15
2053 TA01
V
S
= 3V
V
REF
= 0V
T
A
= 25°C
–
LTC2053
7
6
5
1, 4
GAIN = 1+
0.1µF
R1
10Ω
R2 10k
R2
R1
OUT
3
+
0
1.0
1.5
2.0
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
U
G = 1000
G = 100
3.0
2053 G01
U
U
2053fa
1
LTC2053
ABSOLUTE
(Note 1)
AXI U RATI GS
Operating Temperature Range
LTC2053C ............................................... 0°C to 70°C
LTC2053I ............................................ – 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
Total Supply Voltage (V
+
to V
–
) ............................... 11V
Input Current ......................................................
±10mA
V
IN+
– V
REF
........................................................
5.5V
V
IN–
– V
REF
........................................................
5.5V
Output Short Circuit Duration .......................... Indefinite
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
TOP VIEW
EN
–IN
+IN
V
–
1
2
3
4
8
7
6
5
V
+
OUT
RG
REF
LTC2053CMS8
LTC2053IMS8
LTC2053HMS8
MS8 PART MARKING
LTVT
LTJY
LTAFB
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 200°C/W
*The temperature grade (C, I, or H) of the LTC2053 in the DFN package is indicated on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Gain Error
Gain Nonlinearity
Input Offset Voltage (Note 2)
Average Input Offset Drift (Note 2)
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
Input Noise Voltage
Common Mode Rejection Ratio
(Notes 4, 5)
CONDITIONS
A
V
= 1
A
V
= 1
V
CM
= 200mV
T
A
= – 40°C to 85°C
T
A
= 85°C to 125°C
V
CM
= 1.2V
V
CM
= 1.2V
DC to 10Hz
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 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.
MIN
q
q
A
V
= 1, V
CM
= 0V to 3V, LTC2053C
A
V
= 1, V
CM
= 0.1V to 2.9V, LTC2053I
A
V
= 1, V
CM
= 0V to 3V, LTC2053I
A
V
= 1, V
CM
= 0.1V to 2.9V, LTC2053H
A
V
= 1, V
CM
= 0V to 3V, LTC2053H
2
U
U
W
W W
U
W
TOP VIEW
EN
–IN
+IN
V
–
1
2
3
4
8 V
+
7 OUT
6 RG
5 REF
ORDER PART NUMBER*
LTC2053CDD
LTC2053IDD
LTC2053HDD
DD PART MARKING
LAEQ
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 160°C/W
UNDERSIDE METAL INTERNALLY
CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
TYP
0.001
3
–5
MAX
0.01
12
±10
±50
–2.5
10
3
UNITS
%
ppm
µV
nV/°C
µV/°C
nA
nA
µV
P-P
dB
dB
dB
dB
dB
2053fa
q
q
q
q
–1
4
1
2.5
105
105
95
100
90
113
113
113
q
q
q
q
q
LTC2053
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 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
Power Supply Rejection Ratio (Note 6)
Output Voltage Swing High
Output Voltage Swing Low
Supply Current
Supply Current, Shutdown
EN Pin Input Low Voltage, V
IL
EN Pin Input High Voltage, V
IH
EN Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
Internal Sampling Frequency
V
EN
= V
–
2.5
– 0.5
200
0.2
3
–10
V
EN
≤
0.5V, No Load
V
EN
≥
2.5V
CONDITIONS
V
S
= 2.7V to 6V
R
L
= 2k to V
–
R
L
= 10k to V
–
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
MIN
110
2.85
2.95
TYP
116
2.94
2.98
MAX
UNITS
dB
V
V
20
0.75
1
10
0.5
mV
mA
µA
V
V
µA
kHz
V/µs
kHz
The
q
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 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
Gain Error
Gain Nonlinearity
Input Offset Voltage (Note 2)
Average Input Offset Drift (Note 2)
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
Common Mode Rejection Ratio
(Notes 4, 5)
CONDITIONS
A
V
= 1
A
V
= 1
V
CM
= 200mV
T
A
= – 40°C to 85°C
T
A
= 85°C to 125°C
V
CM
= 1.2V
V
CM
= 1.2V
A
V
= 1, V
CM
= 0V to 5V, LTC2053C
A
V
= 1, V
CM
= 0.1V to 4.9V, LTC2053I
A
V
= 1, V
CM
= 0V to 5V, LTC2053I
A
V
= 1, V
CM
= 0.1V to 4.9V, LTC2053H
A
V
= 1, V
CM
= 0V to 5V, LTC2053H
V
S
= 2.7V to 6V
R
L
= 2k to V
–
R
L
= 10k to V
–
V
EN
≤
0.5V, No Load
V
EN
≥
4.5V
4.5
V
EN
= V
–
–1
200
0.2
3
–10
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
TYP
0.001
3
–5
–1
4
1
MAX
0.01
10
±10
±50
–2.5
10
3
UNITS
%
ppm
µV
nV/°C
µV/°C
nA
nA
dB
dB
dB
dB
dB
dB
V
V
105
105
95
100
90
110
4.85
4.95
116
116
116
Power Supply Rejection Ratio (Note 6)
Output Voltage Swing High
Output Voltage Swing Low
Supply Current
Supply Current, Shutdown
EN Pin Input Low Voltage, V
IL
EN Pin Input High Voltage, V
IH
EN Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
Internal Sampling Frequency
116
4.94
4.98
20
0.85
1.1
10
0.5
mV
mA
µA
V
V
µA
kHz
V/µs
kHz
2053fa
3
LTC2053
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, V
–
= – 5V, REF = 0V.
PARAMETER
Gain Error
Gain Nonlinearity
Input Offset Voltage (Note 2)
Average Input Offset Drift (Note 2)
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
Common Mode Rejection Ratio
(Notes 4, 5)
CONDITIONS
A
V
= 1
A
V
= 1
V
CM
= 0V
T
A
= – 40°C to 85°C
T
A
= 85°C to 125°C
V
CM
= 1V
V
CM
= 1V
A
V
= 1, V
CM
= – 5V to 5V, LTC2053C
A
V
= 1, V
CM
= – 4.9V to 4.9V, LTC2053I
A
V
= 1, V
CM
= – 5V to 5V, LTC2053I
A
V
= 1, V
CM
= –4.9V to 4.9V, LTC2053H
A
V
= 1, V
CM
= –5V to 5V, LTC2053H
V
S
= 2.7V to 11V
R
L
= 2k to GND, LTC2053C, LTC2053I
R
L
= 10k to GND, LTC2053C, LTC2053I, LTC2053H
R
L
= 2k to GND, LTC2053H
V
EN
≤
– 4.5V, No Load
V
EN
≥
4.5V
4.5
V
EN
= V
–
–3
200
0.2
3
– 20
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
MIN
TYP
0.001
3
10
–1
4
1
MAX
0.01
10
±20
±50
–2.5
10
3
UNITS
%
ppm
µV
nV/°C
µV/°C
nA
nA
dB
dB
dB
dB
dB
dB
V
V
V
105
105
95
100
90
110
±4.5
±4.6
±4.4
118
118
118
Power Supply Rejection Ratio (Note 6)
Maximum Output Voltage Swing
116
±4.8
±4.9
±4.8
0.95
1.3
20
– 4.5
Supply Current
Supply Current, Shutdown
EN Pin Input Low Voltage, V
IL
EN Pin Input High Voltage, V
IH
EN Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
Internal Sampling Frequency
mA
µA
V
V
µA
kHz
V/µs
kHz
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
OS
is measured to a limit determined by test equipment
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.
Note 4:
The CMRR with a voltage gain, A
V
, larger than 10 is 120dB (typ).
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.
2053fa
4
LTC2053
TYPICAL PERFOR A CE CHARACTERISTICS
Input Offset Voltage vs Input
Common Mode Voltage
15
10
5
0
–5
G = 10
–10
G=1
–15
–15
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
V
S
= 3V
V
REF
= 0V
T
A
= 25°C
G = 1000
G = 100
0
1.0
1.5
2.0
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
Input Offset Voltage vs Input
Common Mode Voltage
20
V
S
= 3V
15 V
REF
= 0V
G = 10
10
5
0
–5
–10
–15
–20
0
T
A
= 25°C
T
A
= 70°C
T
A
= –55°C
1.0
1.5
2.0
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
3.0
T
A
= 85°C
20
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
Input Offset Voltage vs Input
Common Mode Voltage
60
40
20
0
T
A
= 25°C
–20
–40
–60
T
A
= 125°C
H-GRADE PARTS
V
S
= 3V
V
REF
= 0V
G = 10
60
40
20
0
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
T
A
= 85°C
0
1.0
1.5
2.0
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
U W
2053 G01
2053 G04
Input Offset Voltage vs Input
Common Mode Voltage
15
V
S
= 5V
V
REF
= 0V
10 T
A
= 25°C
5
0
–5
–10
G = 10
G = 100
G=1
G = 1000
20
Input Offset Voltage vs Input
Common Mode Voltage
V
S
=
±5V
V
REF
= 0V
15
T
A
= 25°C
10
5
0
–5
–10
–15
G=1
G=100
G=10
G=1000
3.0
0
2
3
4
1
INPUT COMMON MODE VOLTAGE (V)
5
–20
–5
–1
1
3
–3
INPUT COMMON MODE VOLTAGE (V)
5
2053 G02
2053 G03
Input Offset Voltage vs Input
Common Mode Voltage
V
S
= 5V
V
REF
= 0V
15
G = 10
10
5
0
–5
–10
–15
–20
0
T
A
= 25°C
T
A
= 85°C
T
A
= 70°C
20
Input Offset Voltage vs Input
Common Mode Voltage
V
S
=
±5V
V
REF
= 0V
15
G = 10
10
5
0
–5
–10
–15
–20
T
A
= –55°C
T
A
= 70°C
T
A
= 25°C
T
A
= 85°C
T
A
= –55°C
2
3
4
1
INPUT COMMON MODE VOLTAGE (V)
5
–5
–1
1
3
–3
INPUT COMMON MODE VOLTAGE (V)
5
2053 G05
2053 G06
Input Offset Voltage vs Input
Common Mode Voltage
H-GRADE PARTS
V
S
= 5V
V
REF
= 0V
G = 10
100
Input Offset Voltage vs Input
Common Mode Voltage
H-GRADE PARTS
80 V
S
=
±5V
60 V
REF
= 0V
G = 10
40
20
0
–20
–40
–60
–80
–100
T
A
= 125°C
–5
–1
1
3
–3
INPUT COMMON MODE VOLTAGE (V)
5
T
A
= 25°C
T
A
= 85°C
T
A
= 85°C
–20
–40
–60
T
A
= 25°C
T
A
= 125°C
0
2
3
4
1
INPUT COMMON MODE VOLTAGE (V)
5
3.0
2053 G07
2053 G08
2053 G09
2053fa
5
FPGA/CPLD
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