LT1635
Micropower Rail-to-Rail
Op Amp and Reference
FEATURES
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DESCRIPTION
The LT
廬
1635 is a new analog building block that includes a
rail-to-rail output op amp, a precision reference and reference
buffer. The device operates from supplies as low as a single
1.2V or up to
鹵5V,
yet it consumes only 130碌A(chǔ) of supply
current.
The input common mode range of the op amp includes
ground and incorporates phase reversal protection to pre-
vent false outputs from occurring when the input is below
the negative supply. The rail-to-rail output stage can swing to
within 15mV of each rail with no load and can swing to within
250mV of each rail while delivering 10mA of output current.
The gain bandwidth of the op amp is 175kHz and it is unity-
gain stable with up to 1000pF load capacitance.
The 0.2V reference is referred to V
鈥?/div>
and includes a buffer
amplifier to enhance flexibility. The reference and buffer
combine to achieve a drift of 30ppm/擄C, a line regulation of
20ppm/V and a load regulation of 150ppm/mA.
The LT1635 is available in 8-pin PDIP and SO packages, and
has the industry standard LM10 pinout.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Guaranteed Operation at 1.2V
Op Amp and Reference on Single Chip
Micropower: 130
碌
A Supply Current
Industrial Temperature Range SO-8 Packages
Rail-to-Rail Output
High Output Current: 25mA Min
Output Drives 1000pF
Capable of Floating Mode Operation
Specified for 5V and
鹵5V
Supplies
Low Reference Drift: 30ppm/擄C
Industry Standard LM10 Pinout
APPLICATIONS
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Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
Precision Current Regulators
Precision Voltage Regulators
Battery Level Indicator
Thermocouple Transmitter
TYPICAL APPLICATION
0V to 5V Regulator
C1
0.01碌F
V
IN
> 5.2V
PERCENT OF UNITS
Typical Distribution of Input Offset Voltage
25
V
S
= 5V, 0V
T
A
= 25擄C
20
R1
100k
15
R2
3.9k
V
OUT
ADJ
+
3
鈥?/div>
2
7
LT1635
4
8
1
R3
5k
1635 TA01
10
6
V
OUT
0V TO 5V
5
0
鈥?1.0
鈥?0.6
0.2
0.6
鈥?0.2
INPUT OFFSET VOLTAGE (mV)
U
U
U
1.0
1635 TA02
1
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