LINEAR TECHNOLOGY LT1677 Technical data

FEATURES

■

Rail-to-Rail Input and Output

■

100% Tested Low Voltage Noise:

3.2nV/√Hz Typ at 1kHz

4.5nV/√Hz Max at 1kHz

■

Offset Voltage: 60µV Max

■

Low VOS Drift: 0.2µV/°C Typ

■

Low Input Bias Current: 20nA Max

■

Wide Supply Range: 3V to ±18V

■

High A

■

High CMRR: 109dB Min

■

High PSRR: 108dB Min

■

Gain Bandwidth Product: 7.2MHz

■

Slew Rate: 2.5V/µs

■

Operating Temperature Range: –40°C to 85°C

: 7V/µV Min, RL = 10k

VOL

U

APPLICATIO S

■

Low Noise Signal Processing

■

Microvolt Accuracy Threshold Detection

■

Strain Gauge Amplifiers

■

Tape Head Preamplifiers

■

Direct Coupled Audio Gain Stages

■

Infrared Detectors

■

Battery-Powered Microphones

LT1677

Low Noise, Rail-to-Rail

Precision Op Amp

U

DESCRIPTIO

The LT®1677 features the lowest noise performance avail­able for a rail-to-rail operational amplifier: 3.2nV/√Hz
wideband noise, 1/f corner frequency of 13Hz and 90nV
peak-to-peak 0.1Hz to 10Hz noise. Low noise is combined
with outstanding precision: 20µV offset voltage and

0.2µV/°C drift, 130dB common mode and power supply
rejection and 7.2MHz gain bandwidth product. The com­mon mode range exceeds the power supply by 100mV.

The voltage gain of the LT1677 is extremely high, 19 million
(typical) driving a 10k load.

In the design, processing and testing of the device, particular
attention has been paid to the optimization of the entire
distribution of several key parameters. Consequently, the
specifications have been spectacularly improved compared
to competing rail-to-rail amplifiers.

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

3V Electret Microphone Amplifier

= –100

A

PANASONIC

ELECTRET

CONDENSER

MICROPHONE

WM-61

www.panasonic.com/pic

[phone]

1.5V

R1

10k

C1

0.68µF

23Hz

HIGHPASS

V

R2

10k

U

Distribution of Offset Voltage

25

TA = 25°C

= ±15V

V

S

R3
1M

1.5V

–

2

3

LT1677

+

7

4

–1.5V

HEADPHONES

6

1677 TA01

TO PA

OR

20

15

10

PERCENT OF UNITS

5

0

–40

–30 –20

INPUT OFFSET VOLTAGE (µV)

0

–10 10 40

20 30

1677 TA02

1677fa

1

LT1677

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

N8 PACKAGE
8-LEAD PDIP

1

2

3

4

8

7

6

5

V

OS

TRIM

V

OS

TRIM
+V

S

OUT

NC

–IN

+IN

–V

S

–

+

WWWU

ABSOLUTE AXI U RATI GS

PACKAGE/ORDER I FOR ATIO

UU

W

(Note 1)

Supply Voltage ...................................................... ± 22V

Input Voltages (Note 2) ............ 0.3V Beyond Either Rail

Differential Input Current (Note 2) ..................... ± 25mA

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

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

T

= 150°C, θJA = 150°C/ W (N8)

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

Operating Temperature Range

LT1677C (Note 4) ............................. – 40°C to 85°C

LT1677I ............................................. – 40°C to 85°C

Specified Temperature Range

LT1677C (Note 5) ............................. – 40°C to 85°C

LT1677I ............................................. – 40°C to 85°C

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS

V

OS

∆V
∆Temp

∆V
∆Time

I

B

I

OS

2

OS

OS

Input Offset Voltage (Note 11) 35 90 µV

Average Input Offset Drift (Note 10) SO-8

Long Term Input Voltage Stability 0.3 µV/Mo

Input Bias Current (Note 11) ±2 ±20 nA

Input Offset Current (Note 11) 415 nA

= 25°C. VS = 3V, VCM = VO = 1.7V; VS = 5V, VCM = VO = 2.5V unless otherwise noted.

A

The ● denotes the specifications which apply over the full operating

≤ 70°C

0°C ≤ T

A

–40°C ≤ T

VCM = VS + 0.1V 150 400 µV

= VS – 0.2V, 0°C ≤ TA ≤ 70°C

V

CM

= VS – 0.3V, –40°C ≤ TA ≤ 85°C

V

CM

VCM = –0.1V 1.5 5.0 mV

= 0V, 0°C ≤ TA ≤ 70°C

V

CM

= 0V, –40°C ≤ TA ≤ 85°C

V

CM

N8

0°C ≤ TA ≤ 70°C
–40°C ≤ T

VCM = VS + 0.1V 0.19 0.40 µA

= VS – 0.2V, 0°C ≤ TA ≤ 70°C

V

CM

= VS – 0.3V, –40°C ≤ TA ≤ 85°C

V

CM

VCM = –0.1V –1.2 –0.41 µA

= 0V, 0°C ≤ TA ≤ 70°C

V

CM

= 0V, –40°C ≤ TA ≤ 85°C

V

CM

≤ 70°C

0°C ≤ T

A

–40°C ≤ T

VCM = VS + 0.1V 6 30 nA

= VS – 0.2V, 0°C ≤ TA ≤ 70°C

V

CM

= VS – 0.3V, –40°C ≤ TA ≤ 85°C

V

CM

VCM = –0.1V 20 100 nA

= 0V, 0°C ≤ TA ≤ 70°C

V

CM

VCM = 0V, –40°C ≤ TA ≤ 85°C

ORDER PART NUMBER

LT1677CS8
LT1677IS8
LT1677CN8
LT1677IN8

Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

≤ 85°C

A

≤ 85°C

A

≤ 85°C

A

JMAX

= 150°C, θJA = 190°C/ W (S0-8)

T

JMAX

●

●

●

●

●

●

●

●

●

●

●

●

●

–2.0 – 0.45 µA

●

–2.3 – 0.47 µA

●

●

●

●

●

●

S8 PART MARKING

1677
1677I

55 150 µV
75 210 µV

180 550 µV
200 650 µV

1.8 6.0 mV

2.0 6.5 mV

0.40 2.0 µV/°C

0.20 1.5 µV/°C

±3 ±35 nA
±7 ±50 nA

0.19 0.60 µA

0.25 0.75 µA

520 nA
840 nA

10 40 nA
15 65 nA

25 150 nA
30 160 nA

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LT1677

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes the specifications which apply over the full operating

= 25°C. VS = 3V, VCM = VO = 1.7V; VS = 5V, VCM = VO = 2.5V unless

A

otherwise noted.

SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS

e

n

i

n

V

CM

R

IN

C

IN

CMRR Common Mode Rejection Ratio (Note 11) VS = 3V

PSRR Power Supply Rejection Ratio VS = 2.7V to 40V, VCM = VO = 1.7V 108 125 dB

A

VOL

Input Noise Voltage 0.1Hz to 10Hz (Note 7) 90 nV

VCM = V

S

180 nV

VCM = 0V 600 nV

P-P
P-P
P-P

Input Noise Voltage Density (Note 8) fO = 10Hz 5.2 nV/√Hz

= VS, fO = 10Hz 7 nV/√Hz

V

CM

= 0V, fO = 10Hz 25 nV/√Hz

V

CM

fO = 1kHz 3.2 4.5 nV/√Hz
V

= VS, fO = 1kHz 5.3 nV/√Hz

CM

= 0V, fO = 1kHz 17 nV/√Hz

V

CM

Input Noise Current Density fO = 10Hz 1.2 pA/√Hz

= 1kHz 0.3 pA/√Hz

f

O

Input Voltage Range –0.1 VS + 0.1V V

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0V

●

0V

S
S

– 0.2V V
– 0.3V V

Input Resistance Common Mode 2 GΩ

Input Capacitance 4.2 pF

V

= –0.1V to 3.1V 55 68 dB

CM

= 0V to 2.7V

V

CM

●

53 67 dB

VS = 5V

= –0.1V to 5.1V 60 73 dB

V

CM

V

= 0V to 4.7V

CM

= 3.1V to 40V, VCM = VO = 1.7V

V

S

●

58 72 dB

●

105 120 dB

Large-Signal Voltage Gain VS = 3V, RL ≥ 10k, VO = 2.5V to 0.7V 0.6 4 V/µV

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.4 3 V/µV

●

0.4 3 V/µV

VS = 3V, RL ≥ 2k, VO = 2.2V to 0.7V 0.5 1 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.4 0.9 V/µV

●

0.4 0.8 V/µV

VS = 3V, RL ≥ 600Ω, VO = 2.2V to 0.7V 0.20 0.43 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.15 0.40 V/µV

●

0.10 0.35 V/µV

VS = 5V, RL ≥ 10k, VO = 4.5V to 0.7V 0.8 5 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.7 4 V/µV

●

0.7 4 V/µV

VS = 5V, RL ≥ 2k, VO = 4.2V to 0.7V 0.40 0.9 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.35 0.8 V/µV

●

0.25 0.6 V/µV

VS = 5V, RL ≥ 600Ω, VO = 4.2V to 0.7V 0.35 0.67 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.30 0.60 V/µV

●

0.20 0.45 V/µV

1677fa

3

LT1677

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes the specifications which apply over the full operating

= 25°C. VS = 3V, VCM = VO = 1.7V; VS = 5V, VCM = VO = 2.5V unless

A

otherwise noted.

SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS

V

OL

V

OH

I

SC

SR Slew Rate (Note 13) AV = –1 1.7 2.5 V/µs

GBW Gain Bandwidth Product (Note 11) fO = 100kHz 4.5 7.2 MHz

t

S

R

O

I

S

Output Voltage Swing Low (Note 11) Above GND

= 0.1mA 110 170 mV

I

SINK

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

●

125 200 mV
130 230 mV

Above GND
I

= 2.5mA 170 250 mV

SINK

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

●

195 320 mV
205 350 mV

Above GND
I

= 10mA 370 500 mV

SINK

0°C ≤ T
–40°C ≤ T

Output Voltage Swing High (Note 11) Below V

I

SOURCE

0°C ≤ T
–40°C ≤ T

Below V
I

SOURCE

0°C ≤ T
–40°C ≤ T

Below V
I

SOURCE

0°C ≤ T
–40°C ≤ T

≤ 70°C

A

≤ 85°C

A

S

= 0.1mA 75 170 mV

≤ 70°C

A

≤ 85°C

A

S

= 2.5mA 170 300 mV

≤ 70°C

A

≤ 85°C

A

S

= 10mA 450 700 mV

≤ 70°C

A

≤ 85°C

A

●

●

●

●

●

●

●

●

440 600 mV
465 650 mV

85 200 mV
93 250 mV

195 350 mV
205 375 mV

510 800 mV
525 850 mV

Output Short-Circuit Current (Note 3) VS = 3V 15 22 mA

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

14 20 mA

●

13 19 mA

VS = 5V 20 29 mA

≤ 70°C

0°C ≤ T

A

–40°C ≤ T

R

≥ 10k, 0°C ≤ TA ≤ 70°C

L

≥ 10k, –40°C ≤ TA ≤ 85°C

R

L

= 100kHz, 0°C ≤ TA ≤ 70°C

f

O

f

= 100kHz, –40°C ≤ TA ≤ 85°C

O

≤ 85°C

A

●

18 27 mA

●

17 25 mA

●

1.5 2.3 V/µs

●

1.2 2.0 V/µs

●

3.8 6.2 MHz

●

3.7 5.8 MHz

Settling Time 2V Step 0.1%, AV = +1 2.1 µs

Open-Loop Output Resistance I
Closed-Loop Output Resistance A

2V Step 0.01%, A

= 0 80 Ω

OUT

= 100, f = 10kHz 1 Ω

V

= +1 3.5 µs

V

Supply Current (Note 12) 2.60 3.4 mA

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

●

2.75 3.7 mA

2.80 3.8 mA

4

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LT1677

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes the specifications which apply over the full operating

= 25°C. VS = ±15V, VCM = VO = 0V unless otherwise noted.

A

SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS

V

OS

Input Offset Voltage 20 60 µV

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

●

30 120 µV
45 180 µV

VCM = 15.1V 150 400 µV

= 14.8V, 0°C ≤ TA ≤ 70°C

V

CM

= 14.7V, –40°C ≤ TA ≤ 85°C

V

CM

●

●

180 550 µV
200 650 µV

VCM = –15.1V 1.5 5.0 mV
V

∆V

OS

∆Temp
∆V

OS

= –15V, 0°C ≤ TA ≤ 70°C

CM

= –15V, – 40°C ≤ TA ≤ 85°C

V

CM

Average Input Offset Drift (Note 10) SO-8

N8

Long Term Input Voltage Stability 0.3 µV/Mo

●

●

●

●

1.8 6.0 mV

2.0 6.5 mV

0.40 2.0 µV/°C

0.20 1.5 µV/°C

∆Time

I

B

Input Bias Current ±2 ± 20 nA

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

●

±3 ±35 nA
±7 ±50 nA

VCM = 15.1V 0.19 0.40 µA

= 14.8V, 0°C ≤ TA ≤ 70°C

V

CM

V

= 14.7V, –40°C ≤ TA ≤ 85°C

CM

●

●

0.20 0.60 µA

0.25 0.75 µA

VCM = –15.1V –1.2 – 0.42 µA
V

= –15V, 0°C ≤ TA ≤ 70°C

CM

= –15V, – 40°C ≤ TA ≤ 85°C

V

CM

I

OS

Input Offset Current 315 nA

≤ 70°C

0°C ≤ T

A

–40°C ≤ T

≤ 85°C

A

●

–2.0 – 0.46 µA

●

–2.3 – 0.48 µA

●

●

520 nA
840 nA

VCM = 15.1V 5 25 nA

= 14.8V, 0°C ≤ TA ≤ 70°C

V

CM

= 14.7V, –40°C ≤ TA ≤ 85°C

V

CM

●

●

835 nA

12 60 nA

VCM = –15.1V 20 105 nA
V

= –15V, 0°C ≤ TA ≤ 70°C

CM

= –15V, – 40°C ≤ TA ≤ 85°C

V

CM

e

n

Input Noise Voltage 0.1Hz to 10Hz (Note 7) 90 nV

VCM = 15V 180 nV
VCM = –15V 600 nV

●

●

25 160 nA
30 170 nA

P-P
P-P
P-P

Input Noise Voltage Density fO = 10Hz 5.2 nV/√Hz

V

= 15V, fO = 10Hz 7 nV/√Hz

CM

= –15V, fO = 10Hz 25 nV/√Hz

V

CM

fO = 1kHz 3.2 4.5 nV/√Hz

= 15V, fO = 1kHz 5.3 nV/√Hz

V

CM

V

= –15V, fO = 1kHz 17 nV/√Hz

CM

i

n

V

CM

R

IN

C

IN

Input Noise Current Density fO = 10Hz 1.2 pA/√Hz

= 1kHz 0.3 pA/√Hz

f

O

Input Voltage Range – 15.1 15.1 V

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

– 15.0 14.8 V

●

– 15.0 14.7 V

Input Resistance Common Mode 2 GΩ

Input Capacitance 4.2 pF

1677fa

5

LT1677

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes the specifications which apply over the full operating

= 25°C. VS = ± 15V, VCM = VO = 0V unless otherwise noted.

A

SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS

CMRR Common Mode Rejection Ratio VCM = –13.3V to 14V 109 130 dB

●

105 124 dB

VCM = –15.1V to 15.1V 74 95 dB

= –15V to 14.7V

V

CM

●

72 91 dB

PSRR Power Supply Rejection Ratio VS = ±1.7V to ±18V 106 130 dB

●

103 125 dB

VS = 2.7V to 40V 108 125 dB

= 3.1V to 40V

V

S

A

VOL

Large-Signal Voltage Gain RL ≥ 10k, VO = ±14V 7 19 V/µV

≤ 70°C

0°C ≤ T

A

–40°C ≤ T

≤ 85°C

A

●

105 120 dB

●

413 V/µV

●

38 V/µV

RL ≥ 2k, VO = ±13.5V 0.50 0.75 V/µV
0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

0.30 0.67 V/µV

●

0.15 0.24 V/µV

RL ≥ 600Ω, VO = ±10V 0.2 0.5 V/µV

V

OL

V

OH

I

SC

Output Voltage Swing Low Above –V

I
0°C ≤ T
–40°C ≤ T

Above –V
I
0°C ≤ T
–40°C ≤ T

Above –V
I
0°C ≤ T
–40°C ≤ T

Output Voltage Swing High Below +V

I
0°C ≤ T
–40°C ≤ T

Below +V
I
0°C ≤ T
–40°C ≤ T

Below +V
I
0°C ≤ T
–40°C ≤ T

S

= 0.1mA 110 170 mV

SINK

≤ 70°C

A

≤ 85°C

A

S

= 2.5mA 170 250 mV

SINK

≤ 70°C

A

≤ 85°C

A

S

= 10mA 370 500 mV

SINK

≤ 70°C

A

≤ 85°C

A

S

= 0.1mA 110 170 mV

SOURCE

≤ 70°C

A

≤ 85°C

A

S

= 2.5mA 210 300 mV

SOURCE

≤ 70°C

A

≤ 85°C

A

S

= 10mA 520 700 mV

SOURCE

≤ 70°C

A

≤ 85°C

A

●

●

●

●

●

●

●

●

●

●

●

●

125 200 mV
130 230 mV

195 320 mV
205 350 mV

440 600 mV
450 650 mV

130 200 mV
140 250 mV

240 350 mV
250 375 mV

590 800 mV
620 850 mV

Output Short-Circuit Current (Note 3) 25 35 mA

0°C ≤ T

A

–40°C ≤ T

≤ 70°C

≤ 85°C

A

●

20 30 mA

●

18 28 mA

SR Slew Rate RL ≥ 10k (Note 9) 1.7 2.5 V/µs

≥ 10k (Note 9) 0°C ≤ TA ≤ 70°C

R

L

R

≥ 10k (Note 9) –40°C ≤ TA ≤ 85°C

L

●

1.5 2.3 V/µs

●

1.2 2.0 V/µs

GBW Gain Bandwidth Product fO = 100kHz 4.5 7.2 MHz

= 100kHz, 0°C ≤ TA ≤ 70°C

f

O

= 100kHz, –40°C ≤ TA ≤ 85°C

f

O

●

3.8 6.2 MHz

●

3.7 5.8 MHz

6

1677fa