LINEAR TECHNOLOGY LT1880 Technical data

FEATURES

LT1880

SOT-23, Rail-to-Rail Output,

Picoamp Input Current

Precision Op Amp

U

DESCRIPTIO

■

Offset Voltage: 150µV Max

■

Input Bias Current: 900pA Max

■

Offset Voltage Drift: 1.2µV/°C Max

■

Rail-to-Rail Output Swing

■

Operates with Single or Split Supplies

■

Open-Loop Voltage Gain: 1 Million Min

■

1.2mA Supply Current

■

Slew Rate: 0.4V/µs

■

Gain Bandwidth: 1.1MHz

■

Low Noise: 13nV/√Hz at 1kHz

■

Low Profile (1mm) ThinSOT

TM

Package

U

APPLICATIO S

■

Thermocouple Amplifiers

■

Bridge Transducer Conditioners

■

Instrumentation Amplifiers

■

Battery-Powered Systems

■

Photocurrent Amplifiers

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TYPICAL APPLICATIO

The LT®1880 op amp brings high accuracy input perfor­mance and rail-to-rail output swing to the SOT-23 pack­age. Input offset voltage is trimmed to less than 150µV and
the low drift maintains this accuracy over the operating
temperature range. Input bias current is an ultra low
900pA maximum.

The amplifier works on any total power supply voltage
between 2.7V and 36V (fully specified from 5V to ±15V).
Output voltage swings to within 55mV of the negative
supply and 250mV of the positive supply, which makes the
amplifier a good choice for low voltage single supply
operation.

Slew rates of 0.4V/µs with a supply current of 1.2mA give
superior response and settling time performance in a low
power precision amplifier.

The LT1880 is available in a 5-lead SOT-23 package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

Precision Photodiode Amplifier

C1

39pF

R1

100k, 1%

+

V

V

λ

S1

320µV OUTPUT OFFSET, WORST CASE OVER 0°C TO 70°C
60kHz BANDWIDTH

5.8µs RISE TIME, 10% TO 90%, 100mV OUTPUT STEP
52µV

OUTPUT NOISE, MEASURED ON A 100kHz BW

RMS

V

= ±1.5V TO ±18V

S

S1: SIEMENS INFINEON BPW21 PHOTODIODE (~580pF)

–

+

S

LT1880

V

S

–

V

OUT

OUT

= 0.1V/µA

1880 TA01

Distribution of Input Offset Voltage

35

30

25

20

15

10

PERCENT OF UNITS (%)

5

0
–140

–100 –60

INPUT OFFSET VOLTAGE (µV)

20 100 140

–20 60

1880 TA01b

1

LT1880

WW

W

ABSOLUTE AXI U RATI GS

U

UUW

PACKAGE/ORDER I FOR ATIO

(Note 1)

Supply Voltage (V+ to V–) ....................................... 40V

Differential Input Voltage (Note 2) ......................... ±10V

Input Voltage .................................................... V+ to V

Input Current (Note 2) ........................................ ±10mA

Output Short-Circuit Duration (Note 3)............ Indefinite

Operating Temperature Range (Note 4) .. –40°C to 85°C
Specified Temperature Range (Note 5)... – 40°C to 85°C

Maximum Junction Temperature .......................... 150°C

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the full operating

–

OUT 1

Consult LTC Marketing for parts specified with wider operating temperature ranges.

TOP VIEW

–

V

2

+IN 3

S5 PACKAGE

5-LEAD PLASTIC SOT-23

T

= 150°C, θJA = 250°C/W

JMAX

5 V

4 –IN

+

ORDER PART

NUMBER

LT1880CS5
LT1880IS5

S5 PART

MARKING

LTUM
LTVW

temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V unless otherwise noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

OS

I

B

e

n

i

n

R

IN

C

IN

V

CM

CMRR Common Mode Rejection Ratio 1V < VCM < 3.8V ● 116 135 dB
PSRR Power Supply Rejection Ratio V– = 0V, VCM = 1.5V; 2.7V < V+ < 32V ● 110 135 dB

A

VOL

V

OL

Input Offset Voltage 40 150 µV

0°C < T

< 70°C ● 200 µV

A

–40°C < T

Input Offset Voltage Drift 0°C < TA < 70°C ● 0.3 1.2 µV/°C
(Note 6) –40°C < T

Input Offset Current 150 900 pA

0°C < T
–40°C < T

Input Bias Current 150 900 pA

0°C < T

–40°C < T
Input Noise Voltage 0.1Hz to 10Hz 0.5 µV
Input Noise Voltage Density f = 1kHz 13 nV/√Hz
Input Noise Current Density f = 1kHz 0.07 pA/√Hz
Input Resistance Differential 380 MΩ

Common Mode, V
Input Capacitance 3.7 pF
Input Voltage Range ● (V– + 1.0) (V+ – 1.2) V

Minimum Operating Supply Voltage ● 2.4 2.7 V
Large Signal Voltage Gain RL = 10k; 1V < V

R

L

R

L

Output Voltage Swing Low No Load ● 20 55 mV

I

SINK

I

SINK

< 85°C ● 250 µV

A

< 85°C ● 0.3 1.2 µV/°C

A

< 70°C ● 1200 pA

A

< 85°C ● 1400 pA

A

< 70°C ● 1200 pA

A

< 85°C ● 1500 pA

A

= 1V to 3.8V 210 GΩ

CM

< 4V 500 1600 V/mV

OUT

= 2k; 1V < V

= 1k; 1V < V

= 100µA ● 35 65 mV
= 1mA ● 130 200 mV

< 4V 400 800 V/mV

OUT

< 4V 300 400 V/mV

OUT

● 400 V/mV

● 300 V/mV

● 250 V/mV

P-P

2

LT1880

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V unless otherwise noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OH

I

S

I

SC

GBW Gain-Bandwidth Product f = 20kHz 0.8 1.1 MHz
t

S

FPBW Full Power Bandwidth (Note 7) V
THD Total Harmonic Distortion and Noise VO = 2V

+

SR

–

SR

Output Voltage Swing High V+ = 5V; No Load ● 130 250 mV
(Referred to V

+

)V

+

= 5V; I

+

= 5V; I

V

= 100µA ● 150 270 mV

SOURCE

= 1mA ● 220 380 mV

SOURCE

Supply Current per Amplifier V+ = 3V 1.2 1.8 mA

● 2.2 mA

V+ = 5V 1.2 1.9 mA

● 2.3 mA

V+ = 12V 1.35 2 mA

● 2.4 mA

Short-Circuit Current V

Settling Time 0.01%, V

Short to GND ● 10 18 mA

OUT

Short to V

V

OUT

= –1, RL = 2k

A

V

= 4V

OUT

= 2V

V

O

+

= 1.5V to 3.5V 10 µs

OUT

P-P

, AV = –1, f = 1kHz, Rf = 1k, BW = 22kHz 0.002 %

P-P

, AV = 1, f = 1kHz, RL = 10k, BW = 22kHz 0.0008 %

P-P

● 10 20 mA

32 kHz

Slew Rate Positive AV = –1 0.25 0.4 V/µs

● 0.2 V/µs

Slew Rate Negative AV = –1 0.25 0.55 V/µs

● 0.25 V/µs

The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VS= ±15V, VCM = 0V unless otherwise noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

OS

I

B

e

n

i

n

R

IN

C

IN

V

CM

CMRR Common Mode Rejection Ratio –13.5V < VCM < 13.5V ● 118 135 dB
+PSRR Positive Power Supply Rejection Ratio V– = –15V, VCM = 0V; 1.5V < V+ < 18V ● 110 135 dB
–PSRR Negative Power Supply Rejection Ratio V+ = 15V, VCM = 0V; –1.5V < V– < –18V ● 110 135 dB

Input Offset Voltage 40 150 µV

0°C < T

< 70°C ● 200 µV

A

–40°C < T

< 85°C ● 250 µV

A

Input Offset Voltage Drift 0°C < TA < 70°C ● 0.3 1.2 µV/°C
(Note 6) –40°C < T

< 85°C ● 0.3 1.2 µV/°C

A

Input Offset Current 150 900 pA

< 70°C ● 1200 pA

0°C < T

A

–40°C < T

< 85°C ● 1400 pA

A

Input Bias Current 150 900 pA

< 70°C ● 1200 pA

0°C < T

A

–40°C < T
Input Noise Voltage 0.1Hz to 10Hz 0.5 µV

< 85°C ● 1500 pA

A

P-P

Input Noise Voltage Density f = 1kHz 13 nV/√Hz
Input Noise Current Density f = 1kHz 0.07 pA/√Hz
Input Resistance Differential 380 MΩ

Common Mode, V

= –13.5V to 13.5V 190 GΩ

CM

Input Capacitance 3.7 pF
Input Voltage Range ● –13.5 13.5 V

Minimum Operating Supply Voltage ● ±1.2 ±1.35 V

3

LT1880

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VS = ±15V; VCM = 0V unless otherwise noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

A

VOL

V

OL

V

OH

I

S

I

SC

FPBW Full Power Bandwidth (Note 7) V
GBW Gain Bandwidth Product f = 20kHz 0.8 1.1 MHz
THD Total Harmonic Distortion and Noise VO = 25V

+

SR

–

SR

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: The inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 10V, see Application Information, the input current
should be limited to less than 10mA.

Note 3: A heat sink may be required to keep the junction temperature
below absolute maximum ratings.

Note 4: The LT1880C and LT1880I are guaranteed functional over the
operating temperature range of –40°C to 85°C.

Large Signal Voltage Gain RL = 10k; –13.5V < V

R

= 2k; –13.5V < V

L

< 13.5V 1000 1600 V/mV

OUT

< 13.5V 500 1000 V/mV

OUT

● 700 V/mV

● 300 V/mV

Output Voltage Swing Low No Load ● 25 65 mV
(Referred to V

)I

EE

= 100µA ● 35 75 mV

SINK

= 1mA ● 130 200 mV

I

SINK

Output Voltage Swing High No Load ● 185 350 mV
(Referred to V

)I

CC

= 100µA ● 195 370 mV

SOURCE

= 1mA ● 270 450 mV

I

SOURCE

Supply Current per Amplifier 1.5 2.3 mA

● 1.8 2.8 mA

Short-Circuit Current V

OUT

V

OUT

OUT

V

O

= 25V

Short to V

Short to V

= 14V

–

+

P-P

, AV = –1, f = 100kHz, Rf = 10k, BW = 22kHz 0.00029 %

P-P

, AV = 1, f = 100kHz, RL = 10k, BW = 22kHz 0.00029 %

P-P

10 25 mA

● 10 25 mA

10 20 mA

● 10 20 mA

9kHz

Slew Rate Positive AV = –1 0.25 0.4 V/µs

● 0.2 V/µs

Slew Rate Negative AV = –1 0.25 0.55 V/µs

● 0.2 V/µs

Note 5: The LT1880C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet specified
performance from –40°C to 85°C but is not tested or QA sampled at these
temperatures. The LT1880I is guaranteed to meet specified performance
from –40°C to 85°C.

Note 6: This parameter is not 100% tested.
Note 7: Full power bandwidth is calculated from the slew rate.

FPBW = SR/(2πVP)

4