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PDF LT1789-10 Data sheet ( Hoja de datos )
| Número de pieza | LT1789-10 | |
| Descripción | (LT1789-1/-10) Single Supply Rail-to-Rail Output Instrumentation Amplifiers | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LT1789-1/LT1789-10
Micropower,
Single Supply Rail-to-Rail
Output Instrumentation Amplifiers
FEATURES
s Micropower: 95µA Supply Current Max
s Low Input Offset Voltage: 100µV Max
s Low Input Offset Voltage Drift: 0.5µV/°C Max
s Single Gain Set Resistor:
G = 1 to 1000 (LT1789-1)
G = 10 to 1000 (LT1789-10)
s Inputs Common Mode to V–
s Wide Supply Range: 2.2V to 36V Total Supply
s CMRR at G = 10: 96dB Min
s Gain Error: G = 10, 0.25% Max
s Gain Nonlinearity: G = 10, 40ppm Max
s Input Bias Current: 40nA Max
s PSRR at G = 10: 100dB Min
s 1kHz Voltage Noise: 48nV/√Hz
Us 0.1Hz to 10Hz Noise: 1.5µVP-P
APPLICATIO S
s Portable Instrumentation
s Bridge Amplifiers
s Strain Gauge Amplifiers
s Thermocouple Amplifiers
s Differential to Single-Ended Converters
s Medical Instrumentation
DESCRIPTIO
The LT®1789-1/LT1789-10 are micropower, precision in-
strumentation amplifiers that are optimized for single supply
operation from 2.2V to 36V. The quiescent current is 95µA
max, the inputs common mode to ground and the output
swings within 110mV of ground. The gain is set with a single
external resistor for a gain range of 1 to 1000 for the LT1789-
1 and 10 to 1000 for the LT1789-10.
The high accuracy of the LT1789-1 (40ppm maximum
nonlinearity and 0.25% max gain error) is unmatched by
other micropower instrumentation amplifiers. The LT1789-10
maximizes both the input common mode range and dynamic
output range when an amplification of 10 or greater is
required, allowing precise signal processing where other
instrumentation amplifiers fail to operate. The LT1789-1/
LT1789-10 are laser trimmed for very low input offset
voltage, low input offset voltage drift, high CMRR and high
PSRR. The output can handle capacitive loads up to 400pF
(LT1789-1), 1000pF (LT1789-10) in any gain configuration
while the inputs are ESD protected up to 10kV (human body).
The LT1789-1/LT1789-10 are offered in the 8-pin SO pack-
age, requiring significantly less PC board area than discrete
multi op amp and resistor designs.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
0.5A to 4A Voltage Controlled Current Source
C1
4700pF
VS
R1
90.9k
VIN
R2
10k
VS
2– 7
6
LT1636
3+ 5
4
R4
10k 6
VS = 3.3V TO 32V
ILOAD
=
VIN
RSENSE •
10
= 1A PER VOLT AS SHOWN
RISE TIME ≈ 250µs, 10% TO 90%,
1A TO 2A OUTPUT STEP INTO 0.25Ω LOAD
C2
3300pF
C3
0.1µF
R3
100Ω
8k 120Ω
TIP127*
VS
7 +3
8
LT1789-1
REF
1
5 4– 2
* ENSURE ADEQUATE POWER
DISSIPATION CAPABILITY AT
HIGHER VOLTAGES,
3 CURRENTS AND DUTY CYCLES
1
RSENSE*
2 0.1Ω ILOAD
4
RLOAD*
1789 TA01
1789f
1
1 page  
LT1789-1/LT1789-10
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the temperature range
of –40°C ≤ TA ≤ 85°C. VS = 3V, 0V; VS = 5V, 0V; RL = 20k, VREF = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
LT1789-1
LT1789-10
MIN TYP MAX MIN TYP MAX UNITS
Gain Error (Note 6)
G = 1, VO = + 0.3V to (+VS) – 1V
VO = 0.3V to (+VS) – 0.5V
G = 10 (Note 2)
G = 100 (Note 2)
q
q
q
0.30
0.57
0.59
%
0.35 %
0.62 %
Gain Nonlinearity (Note 6)
G = 1, VO = 0.3V to (+VS) – 1V
LT1789-1, VO = 0.3V to (+VS) – 0.5V
LT1789-10, VO = 0.3V to 4.7V, VS = 5V
(Note 8)
G = 10
G = 100
q
q
q
250
105
160
ppm
150 ppm
170 ppm
G/T Gain vs Temperature
G < 1000 (Notes 2, 3)
q 5 50
5 50 ppm/°C
VOST
VOSI
VOSIH
VOSO
VOSOH
VOSI/T
VOSO/T
IOS
IOS/T
IB
IB/T
VCM
CMRR
Total Input Referred Offset Voltage VOST = VOSI + VOSO/G
Input Offset Voltage
G = 1000
Input Offset Voltage Hysteresis (Notes 3, 5)
Output Offset Voltage
G = 1 (LT1789-1), G = 10 (LT1789-10)
Output Offset Voltage Hysteresis (Notes 3, 5)
Input Offset Voltage Drift (RTI) (Note 3)
Output Offset Voltage Drift
(Note 3)
Input Offset Current
(Note 6)
Input Offset Current Drift
Input Bias Current
(Note 6)
Input Bias Current Drift
Input Voltage Range
Common Mode Rejection Ratio
1k Source Imbalance, (Note 6)
LT1789-1 VCM = 0.2V to (+VS) – 1V
LT1789-10 VCM = 0.2V to (+VS) – 1.5V
G=1
G = 10
G = 100, 1000
q
q
q
q
q
q
q
q
q
q
q
q
q
q
0.2
75
92
96
175
3 10
1050
50 100
0.2 0.5
1.5 4
5
3
50
50
+VS – 1 0.2
84
94
205
3 10
4000
300 900
0.3 0.7
7 20
5
3
50
50
+VS – 1.5
µV
µV
µV
µV
µV/°C
µV/°C
nA
pA/°C
nA
pA/°C
V
dB
dB
dB
PSRR Power Supply Rejection Ratio
VS = 2.5V to 12.5V, VCM = VREF = 1V
G=1
G = 10
G = 100, 1000
q 86
q 96
q 98
90
98
dB
dB
dB
Minimum Supply Voltage
q 2.5
2.5 V
IS Supply Current
VOL Output Voltage Swing LOW
VOH Output Voltage Swing HIGH
(Note 7)
(Note 7)
(Note 7)
q 125
125 µA
q 120
130 mV
q +VS – 0.40
+VS – 0.40
V
1789f
5
5 Page 
LT1789-1/LT1789-10
TYPICAL PERFOR A CE CHARACTERISTICS (LT1789-1)
Voltage Noise Density vs
Frequency
1000
VS = 5V, 0V
VREF = 2.5V
INPUT REFERRED
G=1
Current Noise Density vs
Frequency
1000
VS = 5V, 0V
VREF = 2.5V
100 G = 10
G = 100, 1000
100
RS
LT1789-1
10
1
10 100
FREQUENCY (Hz)
1k
1789 G13
10
1
0.1Hz to 10Hz Noise Voltage,
G=1
VS = 5V, 0V
VREF = 2.5V
0.1Hz to 10Hz Noise Voltage,
RTI, G = 1000
VS = 5V, 0V
VREF = 2.5V
10 100
FREQUENCY (Hz)
1k
1789 G14
0.1Hz to 10Hz Noise Current
VS = 5V, 0V
VREF = 2.5V
0 1 2 3 4 5 6 7 8 9 10
TIME (SEC)
1789 G15
0 1 2 3 4 5 6 7 8 9 10
TIME (SEC)
1789 G16
Turn-On Characteristics
1.5
VS = 5V, 0V
VREF = 2.5V
VCM = 2.5V
G = 1000
0.5 TA = 25°C
–0.5
–1.5
0
10 20 30
TIME (ms)
40
1789 G18
0 1 2 3 4 5 6 7 8 9 10
TIME (SEC)
1789 G17
1789f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LT1789-10.PDF ] | |
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