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PDF LT1880 Data sheet ( Hoja de datos )
| Número de pieza | LT1880 | |
| Descripción | Picoamp Input Current Precision Op Amp | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
n Offset Voltage: 150μV Max
n Input Bias Current: 900pA Max
n Offset Voltage Drift: 1.2μV/°C Max
n Rail-to-Rail Output Swing
n Operates with Single or Split Supplies
n Open-Loop Voltage Gain: 1 Million Min
n 1.2mA Supply Current
n Slew Rate: 0.4V/μs
n Gain Bandwidth: 1.1MHz
n Low Noise: 13nV/√Hz at 1kHz
n Low Profile (1mm) ThinSOT™ Package
APPLICATIONS
n Thermocouple Amplifiers
n Bridge Transducer Conditioners
n Instrumentation Amplifiers
n Battery-Powered Systems
n Photocurrent Amplifiers
TYPICAL APPLICATION
Precision Photodiode Amplifier
C1
39pF
R1
100k, 1%
VS+
VL
–
S1 LT1880 OUT
+ VOUT = 0.1V/μA
VS–
1880 TA01
320μV OUTPUT OFFSET, WORST CASE OVER 0°C TO 70°C
60kHz BANDWIDTH
5.8μs RISE TIME, 10% TO 90%, 100mV OUTPUT STEP
52μVRMS OUTPUT NOISE, MEASURED ON A 100kHz BW
VS = ±1.5V TO ±18V
S1: SIEMENS INFINEON BPW21 PHOTODIODE (~580pF)
LT1880
SOT-23, Rail-to-Rail Output,
Picoamp Input Current
Precision Op Amp
DESCRIPTION
The LT®1880 op amp brings high accuracy input perfor-
mance 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 ultralow 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Distribution of Input Offset Voltage
35
30
25
20
15
10
5
0
–140 –100 –60 –20 20 60 100 140
INPUT OFFSET VOLTAGE (μV)
1880 TA01b
1880fa
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LT1880
Input Offset Voltage
vs Temperature
200
TEMPCO: –55°C TO 125°C
150 10 REPRESENTATIVE UNITS
100
50
0
–50
–100
–150
–200
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1880 G01
Input Bias Current
vs Common Mode Voltage
1000
800
600
TA = 25°C
TA = –40°C
TA = 85°C
400 IB–
200
0
–200
–400
IB+
–600
–800
VS = ±15V
–1000
–15 –10
–5
0
5 10
COMMON MODE VOLTAGE (V)
15
1880 G02
Input Bias Current
vs Common Mode Near VEE
1000
VS = ±15V
500
0 IB–
–500
–1000
–14.6
IB+ TA = –40°C
TA = 25°C
TA = 85°C
–14.2
–13.8
–13.4
COMMON MODE VOLTAGE (V)
–13.0
1880 G02B
Input Bias Current vs Temperature
200
VS = ±15V
150
100
IB–
50
0
–50
–100
–150
IB+
–200
–250
–300
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
1880 G03
Input Bias Current
vs Common Mode Near VCC
1000
IB–
VS = ±15V
500
0 IB+
–500
–1000
13.0
TA = –45°C
TA = 25°C
TA = 85°C
13.4 13.8 14.2
COMMON MODE VOLTAGE (V)
14.6
1880 G02A
Output Voltage Swing
vs Load Current
TA = –40°C
–0.5
–1.0 TA = 85°C
–1.5 TA = 25°C
1.5 TA = 25°C
1.0
TA = 85°C
0.5
TA = –40°C
–10 –8 –6 –4 –2 0 2 4 6 8 10
OUTPUT CURRENT (mA)
1880 G04
Warm Up Drift
6
TA = 25°C
5
4 VS = ±15V
3
2
1 VS = ±2.5V
0
01 2 3 4 5
TIME AFTER POWER ON (MIN)
1880 G05
en, in vs Frequency
1000
VS = ±15V
TA = 25°C
CURRENT NOISE
100
VOLTAGE NOISE
10
1
1 10 100 1k
FREQUENCY (Hz)
1880 G08
0.1 to 10Hz Noise
VS = ±15V
TA = 25°C
0 2 4 6 8 10
TIME (SEC)
1880 G09a
1880fa
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5 Page 
SIMPLIFIED SCHEMATIC
V+ 5
R3 R4 CX1
Q41
100μA
Q3
Q58
Q38
Q4
Q59
Q47
B
A
Q5
Q48
R1
500Ω
–IN 4
+IN 3
R2
500Ω
Q1
V– 2
V–
Q46
C
B
A
Q2
21μA
Q16
7μA
Q45
Q44 Q7
R5
Q6
Q8
RCM1 CM1
35μA
Q12 RCM2 CM2
10μA
LT1880
R27
Q23 Q24
1 OUT
CM3
Q14
Q20
R22
500Ω
R38
1880 SD
PACKAGE DESCRIPTION
0.62 0.95
MAX REF
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
1.22 REF
2.90 BSC
(NOTE 4)
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 – 1.75
(NOTE 4)
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.20 BSC
DATUM ‘A’
PIN ONE
0.95 BSC
0.80 – 0.90
1.00 MAX
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.01 – 0.10
0.30 – 0.50 REF
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
0.09 – 0.20
(NOTE 3)
1.90 BSC
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
S5 TSOT-23 0302 REV B
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1880.PDF ] | |
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