LT1677
Low Noise, Rail-to-Rail
Precision Op Amp
FEATURES
■
■
DESCRIPTIO
■
■
■
■
■
■
■
■
■
■
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 V
OS
Drift: 0.2µV/°C Typ
Low Input Bias Current: 20nA Max
Wide Supply Range: 3V to
±18V
High A
VOL
: 7V/µV Min, R
L
= 10k
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
The LT
®
1677 features the lowest noise performance avail-
able 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 com-
mon 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.
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
TYPICAL APPLICATIO
Distribution of Offset Voltage
25
3V Electret Microphone Amplifier
20
T
A
= 25°C
V
S
=
±15V
PERCENT OF UNITS
1.5V
R1
10k
A
V
= –100
R3
1M
1.5V
TO PA
OR
HEADPHONES
23Hz
HIGHPASS
+
3
–
PANASONIC
ELECTRET
CONDENSER
MICROPHONE
WM-61
www.panasonic.com/pic
(714) 373-7334
C1
0.68µF R2
10k
15
2
7
LT1677
4
–1.5V
6
10
5
1677 TA01
0
–40 –30 –20 –10 0
10 20 30
INPUT OFFSET VOLTAGE (µV)
U
40
1677 TA02
U
U
1677fa
1
LT1677
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
OS
1
TRIM
–IN 2
+IN 3
–V
S
4
N8 PACKAGE
8-LEAD PDIP
8
V
OS
TRIM
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
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
–
+
7 +V
S
6 OUT
5 NC
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 150°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S0-8)
ORDER PART NUMBER
LT1677CS8
LT1677IS8
LT1677CN8
LT1677IN8
S8 PART MARKING
1677
1677I
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.
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, V
CM
= V
O
= 1.7V; V
S
= 5V, V
CM
= V
O
= 2.5V unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 11)
CONDITIONS (Note 6)
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= V
S
+ 0.1V
V
CM
= V
S
– 0.2V, 0°C
≤
T
A
≤
70°C
V
CM
= V
S
– 0.3V, – 40°C
≤
T
A
≤
85°C
V
CM
= – 0.1V
V
CM
= 0V, 0°C
≤
T
A
≤
70°C
V
CM
= 0V, – 40°C
≤
T
A
≤
85°C
∆V
OS
∆Temp
∆V
OS
∆Time
I
B
Average Input Offset Drift (Note 10)
Long Term Input Voltage Stability
Input Bias Current (Note 11)
SO-8
N8
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
MIN
TYP
35
55
75
150
180
200
1.5
1.8
2.0
0.40
0.20
0.3
±2
±3
±7
0.19
0.19
0.25
MAX
90
150
210
400
550
650
5.0
6.0
6.5
2.0
1.5
UNITS
µV
µV
µV
µV
µV
µV
mV
mV
mV
µV/°C
µV/°C
µV/Mo
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= V
S
+ 0.1V
V
CM
= V
S
– 0.2V, 0°C
≤
T
A
≤
70°C
V
CM
= V
S
– 0.3V, – 40°C
≤
T
A
≤
85°C
V
CM
= – 0.1V
V
CM
= 0V, 0°C
≤
T
A
≤
70°C
V
CM
= 0V, – 40°C
≤
T
A
≤
85°C
●
●
●
●
●
●
●
●
●
●
●
●
±20
±35
±50
0.40
0.60
0.75
– 1.2
–2.0
–2.3
– 0.41
– 0.45
– 0.47
4
5
8
6
10
15
20
25
30
15
20
40
30
40
65
100
150
160
I
OS
Input Offset Current (Note 11)
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= V
S
+ 0.1V
V
CM
= V
S
– 0.2V, 0°C
≤
T
A
≤
70°C
V
CM
= V
S
– 0.3V, – 40°C
≤
T
A
≤
85°C
V
CM
= – 0.1V
V
CM
= 0V, 0°C
≤
T
A
≤
70°C
V
CM
= 0V, – 40°C
≤
T
A
≤
85°C
2
U
nA
nA
nA
µA
µA
µA
µA
µA
µA
nA
nA
nA
nA
nA
nA
nA
nA
nA
1677fa
W
U
U
W W
W
LT1677
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, V
CM
= V
O
= 1.7V; V
S
= 5V, V
CM
= V
O
= 2.5V unless
otherwise noted.
SYMBOL
e
n
PARAMETER
Input Noise Voltage
CONDITIONS (Note 6)
0.1Hz to 10Hz (Note 7)
V
CM
= V
S
V
CM
= 0V
f
O
= 10Hz
V
CM
= V
S
, f
O
= 10Hz
V
CM
= 0V, f
O
= 10Hz
f
O
= 1kHz
V
CM
= V
S
, f
O
= 1kHz
V
CM
= 0V, f
O
= 1kHz
i
n
V
CM
Input Noise Current Density
Input Voltage Range
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
Input Resistance
Input Capacitance
Common Mode Rejection Ratio (Note 11)
V
S
= 3V
V
CM
= –0.1V to 3.1V
V
CM
= 0V to 2.7V
V
S
= 5V
V
CM
= –0.1V to 5.1V
V
CM
= 0V to 4.7V
PSRR
A
VOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
S
= 2.7V to 40V, V
CM
= V
O
= 1.7V
V
S
= 3.1V to 40V, V
CM
= V
O
= 1.7V
V
S
= 3V, R
L
≥
10k, V
O
= 2.5V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
V
S
= 3V, R
L
≥
2k, V
O
= 2.2V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
V
S
= 3V, R
L
≥
600Ω, V
O
= 2.2V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
V
S
= 5V, R
L
≥
10k, V
O
= 4.5V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
V
S
= 5V, R
L
≥
2k, V
O
= 4.2V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
V
S
= 5V, R
L
≥
600Ω, V
O
= 4.2V to 0.7V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
55
53
60
58
108
105
0.6
0.4
0.4
0.5
0.4
0.4
0.20
0.15
0.10
0.8
0.7
0.7
0.40
0.35
0.25
0.35
0.30
0.20
Common Mode
●
●
ELECTRICAL CHARACTERISTICS
MIN
TYP
90
180
600
5.2
7
25
3.2
5.3
17
1.2
0.3
MAX
UNITS
nV
P-P
nV
P-P
nV
P-P
nV/√Hz
nV/√Hz
nV/√Hz
Input Noise Voltage Density (Note 8)
4.5
nV/√Hz
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
f
O
= 10Hz
f
O
= 1kHz
– 0.1
0
0
V
S
+ 0.1V
V
S
– 0.2V
V
S
– 0.3V
2
4.2
68
67
73
72
125
120
4
3
3
1
0.9
0.8
0.43
0.40
0.35
5
4
4
0.9
0.8
0.6
0.67
0.60
0.45
V
V
V
GΩ
pF
dB
dB
dB
dB
dB
dB
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
V/µV
R
IN
C
IN
CMRR
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
1677fa
3
LT1677
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, V
CM
= V
O
= 1.7V; V
S
= 5V, V
CM
= V
O
= 2.5V unless
otherwise noted.
SYMBOL
V
OL
PARAMETER
Output Voltage Swing Low (Note 11)
CONDITIONS (Note 6)
Above GND
I
SINK
= 0.1mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
Above GND
I
SINK
= 2.5mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
Above GND
I
SINK
= 10mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
OH
Output Voltage Swing High (Note 11)
Below V
S
I
SOURCE
= 0.1mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
Below V
S
I
SOURCE
= 2.5mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
Below V
S
I
SOURCE
= 10mA
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
I
SC
Output Short-Circuit Current (Note 3)
V
S
= 3V
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
S
= 5V
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
SR
Slew Rate (Note 13)
A
V
= – 1
R
L
≥
10k, 0°C
≤
T
A
≤
70°C
R
L
≥
10k, – 40°C
≤
T
A
≤
85°C
f
O
= 100kHz
f
O
= 100kHz, 0°C
≤
T
A
≤
70°C
f
O
= 100kHz, – 40°C
≤
T
A
≤
85°C
2V Step 0.1%, A
V
= +1
2V Step 0.01%, A
V
= +1
I
OUT
= 0
A
V
= 100, f = 10kHz
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
●
●
ELECTRICAL CHARACTERISTICS
MIN
TYP
110
125
130
170
195
205
370
440
465
75
85
93
170
195
205
450
510
525
MAX
170
200
230
250
320
350
500
600
650
170
200
250
300
350
375
700
800
850
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
mA
mA
V/µs
V/µs
V/µs
MHz
MHz
MHz
µs
µs
Ω
Ω
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
15
14
13
20
18
17
1.7
1.5
1.2
4.5
3.8
3.7
22
20
19
29
27
25
2.5
2.3
2.0
7.2
6.2
5.8
2.1
3.5
80
1
2.60
2.75
2.80
3.4
3.7
3.8
GBW
Gain Bandwidth Product (Note 11)
t
S
R
O
I
S
Settling Time
Open-Loop Output Resistance
Closed-Loop Output Resistance
Supply Current (Note 12)
mA
mA
mA
1677fa
4
LT1677
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±15V,
V
CM
= V
O
= 0V unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= 15.1V
V
CM
= 14.8V, 0°C
≤
T
A
≤
70°C
V
CM
= 14.7V, – 40°C
≤
T
A
≤
85°C
V
CM
= – 15.1V
V
CM
= –15V, 0°C
≤
T
A
≤
70°C
V
CM
= –15V, – 40°C
≤
T
A
≤
85°C
∆V
OS
∆Temp
∆V
OS
∆Time
I
B
Average Input Offset Drift (Note 10)
Long Term Input Voltage Stability
Input Bias Current
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= 15.1V
V
CM
= 14.8V, 0°C
≤
T
A
≤
70°C
V
CM
= 14.7V, – 40°C
≤
T
A
≤
85°C
V
CM
= –15.1V
V
CM
= –15V, 0°C
≤
T
A
≤
70°C
V
CM
= –15V, – 40°C
≤
T
A
≤
85°C
I
OS
Input Offset Current
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
V
CM
= 15.1V
V
CM
= 14.8V, 0°C
≤
T
A
≤
70°C
V
CM
= 14.7V, – 40°C
≤
T
A
≤
85°C
V
CM
= –15.1V
V
CM
= –15V, 0°C
≤
T
A
≤
70°C
V
CM
= –15V, – 40°C
≤
T
A
≤
85°C
e
n
Input Noise Voltage
0.1Hz to 10Hz (Note 7)
V
CM
= 15V
V
CM
= –15V
f
O
= 10Hz
V
CM
= 15V, f
O
= 10Hz
V
CM
= –15V, f
O
= 10Hz
f
O
= 1kHz
V
CM
= 15V, f
O
= 1kHz
V
CM
= –15V, f
O
= 1kHz
i
n
V
CM
Input Noise Current Density
Input Voltage Range
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
Input Resistance
Input Capacitance
Common Mode
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS (Note 6)
MIN
TYP
20
30
45
150
180
200
1.5
1.8
2.0
0.40
0.20
0.3
±2
±3
±7
0.19
0.20
0.25
MAX
60
120
180
400
550
650
5.0
6.0
6.5
2.0
1.5
UNITS
µV
µV
µV
µV
µV
µV
mV
mV
mV
µV/°C
µV/°C
µV/Mo
SO-8
N8
±20
±35
±50
0.40
0.60
0.75
nA
nA
nA
µA
µA
µA
µA
µA
µA
– 1.2
–2.0
–2.3
– 0.42
– 0.46
– 0.48
3
5
8
5
8
12
20
25
30
90
180
600
5.2
7
25
3.2
5.3
17
1.2
0.3
4.5
15
20
40
25
35
60
105
160
170
nA
nA
nA
nA
nA
nA
nA
nA
nA
nV
P-P
nV
P-P
nV
P-P
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
Input Noise Voltage Density
f
O
= 10Hz
f
O
= 1kHz
– 15.1
– 15.0
– 15.0
15.1
14.8
14.7
2
4.2
V
V
V
GΩ
pF
R
IN
C
IN
1677fa
5
嵌入式系统
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