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PDF LT1884 Data sheet ( Hoja de datos )
| Número de pieza | LT1884 | |
| Descripción | Dual/Quad Rail-to-Rail Output/ Picoamp Input Precision Op Amps | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Offset Voltage: 50µV Max (LT1884A)
s Input Bias Current: 400pA Max (LT1884A)
s Offset Voltage Drift: 0.8µV/°C Max
s Rail-to-Rail Output Swing
s Operates with Single or Split Supplies
s Open-Loop Voltage Gain: 1 Million Min
s 1mA Maximum Supply Current Per Amplifier
s Slew Rate: 1V/µs
s Standard Pinouts
U
APPLICATIO S
s Thermocouple Amplifiers
s Bridge Transducer Conditioners
s Instrumentation Amplifiers
s Battery-Powered Systems
s Photo Current Amplifiers
s Precision Integrators
s Precision Current Sources
LT1884/LT1885
Dual/Quad Rail-to-Rail
Output, Picoamp Input
Precision Op Amps
DESCRIPTIO
The LT®1884/LT1885 op amps bring high accuracy input
performance to amplifiers with rail-to-rail output swing
while providing faster response than other precision am-
plifiers. Input offset voltage is trimmed to less than 50µV
and the low drift maintains this accuracy over the operat-
ing temperature range. Input bias currents are an ultralow
400pA maximum.
The amplifiers work on any total power supply voltage
between 2.7V and 36V (fully specified from 5V to ±15V).
Output voltage swings to within 40mV of the negative
supply and 220mV of the positive supply make these
amplifiers good choices for low voltage single supply
operation.
Slew rates of 1V/µs with a supply current of less than 1mA
per amplifier give superior response and settling time
performance in a low power precision amplifier.
The dual LT1884 is available with standard pinouts in
8-pin SO and PDIP packages. The quad LT1885 is also in
the standard pinout 14-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
–IN
Input Fault Protected Instrumentation Amplifier
1M 3 +
10pF 1/4 LT1885
–
10k 10k
GUARD
+IN
+
1/4 LT1885
–
RG/2
RG/2
10k
10k
–
1/4 LT1885
1M 5 +
22pF
TRIM FOR
AC CMRR
–
1/4 LT1885
+
OUT
10k 9.76k
2•10k
GAIN =
RG
500Ω
TRIM FIRST
FOR DC CMRR
1884 TA01
1
1 page  
LT1884/LT1885
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
Split supply operation VS = ±15V; VCM = 0V unless otherwise noted. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
+ PSRR
– PSRR
Positive Power Supply Rejection Ratio
Negative Power Supply Rejection Ratio
Minimum Operating Supply Voltage
VEE = –15V, VCM = 0V; 1.5V < VCC < 18V
VCC = 15V, VCM = 0V; –1.5V < VEE < –18V
q
q
q
114
106
132
132
±1.2 ±1.35
dB
dB
V
AVOL Large-Signal Voltage Gain
RL = 10k; –13.5V < VOUT < 13.5V
1000
q 700
1600
V/mV
V/mV
RL = 2k; –13.5V < VOUT < 13.5V
250
q 175
420
V/mV
V/mV
RL = 1k; –12V < VOUT < 12V
100
q 75
230
V/mV
V/mV
VOL Output Voltage Swing Low
(Referred to VEE)
VOH Output Voltage Swing High
(Referred to VCC)
IS Supply Current Per Amplifier
No Load
ISINK = 100µA
ISINK = 1mA
ISINK = 5mA
No Load
ISOURCE = 100µA
ISOURCE = 1mA
ISOURCE = 5mA
VS = ±15V
q
20 40
mV
q
25 50
mV
q
70 150
mV
q
270 600
mV
q
160 220
mV
q
160 230
mV
q
180 300
mV
q
360 600
mV
0.85 1.1
mA
q 1.6 mA
ISC Short-Circuit Current
GBW Gain-Bandwidth Product
VOUT Short to VEE
VOUT Short to VCC
f = 20kHz
q 15
q 15
1.5
50
30
2.2
mA
mA
MHz
tS Settling Time
SR + Positive Slew Rate
SR – Negative Slew Rate
0.01%, VOUT = – 5V to 5V,
AV = –1, RL = 2k
AV = – 1
AV = – 1
0.5
q 0.4
0.40
q 0.26
17
1.0
0.7
µs
V/µs
V/µs
V/µs
V/µs
∆VOS
∆IB+
∆CMRR
Offset Voltage Match (LT1884A)
Offset Voltage Match (LT1884/LT1885)
Offset Voltage Match Drift
Noninverting Bias Current Match
(LT1884A)
Noninverting Bias Current Match
(LT1884/LT1885)
Common Mode Rejection Match
(Note 7)
0°C < TA < 70°C
– 40°C < TA < 85°C
(Note 7)
0°C < TA < 70°C
– 40°C < TA < 85°C
(Note 6, 7)
(Notes 7, 8)
0°C < TA < 70°C
– 40°C < TA < 85°C
(Notes 7, 8)
0°C < TA < 70°C
– 40°C < TA < 85°C
(Notes 7, 9)
q
q
q
q
q
q
q
q
q
q 106
35 70
125
160
µV
µV
µV
35 125
175
235
µV
µV
µV
0.4 1.1 µV/°C
200 600
700
850
pA
pA
pA
240 1200
1600
1900
pA
pA
pA
125 dB
∆ +PSRR Positive Power Supply Rejection Match VEE = –15V, VCM = 0V, 1.5V < VCC < 18V, q
(Notes 7, 9)
108
124
dB
∆ – PSRR Negative Power Supply Rejection Match VCC = 15V, VCM = 0V, – 1.5V < VEE < –18V, q
(Notes 7, 9)
102
132
dB
5
5 Page 
LT1884/LT1885
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
S Package
14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 – 0.344*
(8.560 – 8.738)
14 13 12 11 10
9
8
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
1234567
0° – 8° TYP
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.016 – 0.050
(0.406 – 1.270)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.014 – 0.019
(0.355 – 0.483)
TYP
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.050
(1.270)
BSC
S14 1298
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1884.PDF ] | |
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