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MAX4289ESA+T

P1-P3P4-P6P7-P9
MAX4289
1.0V Micropower, SOT23, Operational Amplifier
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC
= 3V, V
CM
= 0, R
L
to V
CC
/2, T
A
= +25°C, unless otherwise noted.)
4
6
5
8
7
9
10
-40 20 40-20 0 60 80 100
INPUT BIAS CURENT
vs. TEMPERATURE
MAX4289 toc04
TEMPERATURE (°C)
INPUT BIAS CURRENT (nA)
30
20
10
0
-10
0 1.50.5 1.0 2.0 2.5 3.0
INPUT BIAS CURRENT
vs. INPUT COMMON-MODE VOLTAGE
MAX4289 toc05
INPUT COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT (nA)
0
6
4
2
10
8
18
16
14
12
20
-40 -20 0 20 40 60 80 100
OUTPUT SWING HIGH
vs. TEMPERATURE
MAX4289 toc06
TEMPERATURE (°C)
V
OH
(mV)
R
L
CONNECTED TO GND
R
L
= 5kΩ
R
L
= 100kΩ
0
6
4
2
10
8
18
16
14
12
20
-40 -20 0 20 40 60 80 100
OUTPUT SWING LOW
vs. TEMPERATURE
MAX4289 toc07
TEMPERATURE (°C)
V
OL
(mV)
R
L
CONNECTED TO V
CC
R
L
= 5kΩ
R
L
= 100kΩ
30
50
90
70
110
130
0 10050 150 200 250 300
OPEN-LOOP GAIN
vs. OUTPUT SWING LOW
MAX4289 toc08
V
OUT
FROM GND (mV)
GAIN (dB)
R
L
= 5kΩ
R
L
= 100kΩ
30
50
90
70
110
130
0 10050 150 200 250 300
OPEN-LOOP GAIN
vs. OUTPUT SWING HIGH
MAX4289 toc09
V
OUT
FROM V
CC
(mV)
GAIN (dB)
R
L
= 5kΩ
R
L
= 100kΩ
60
80
70
100
90
110
120
-40 20 40-20 0 60 80 100
OPEN-LOOP GAIN vs. TEMPERATURE
MAX4289 toc10
TEMPERATURE (°C)
GAIN (dB)
R
L
= 5kΩ
R
L
= 100kΩ
R
L
CONNECTED TO GND
60
80
70
100
90
110
120
-40 20 40-20 0 60 80 100
OPEN-LOOP GAIN vs. TEMPERATURE
MAX4289 toc11
TEMPERATURE (°C)
GAIN (dB)
R
L
= 5kΩ
R
L
= 100kΩ
R
L
CONNECTED TO V
CC
80
-20
0.01 0.1 1 10 100
GAIN AND PHASE vs. FREQUENCY
(C
L
= 0)
0
MAX4289 toc12
FREQUENCY (kHz)
GAIN (dB)
20
40
60
50
30
10
-10
70
180
-20
20
60
100
140
120
80
40
0
160
PHASE (DEGREES)
GAIN
PHASE
MAX4289
1.0V Micropower, SOT23, Operational Amplifier
_______________________________________________________________________________________ 5
10µs/div
SMALL-SIGNAL TRANSIENT RESPONSE
IN
50mV/div
OUT
50mV/div
MAX4289 toc13
200µs/div
LARGE-SIGNAL TRANSIENT RESPONSE
IN
1V/div
OUT
1V/div
MAX4289 toc14
0.8
0.9
1.0
1.1
1.2
MINIMUM-OPERATING VOLTAGE
vs. TEMPERATURE
MAX4289 toc15
TEMPERATURE (°C)
V
CC
(V)
-40 20 40-20 0 60 80 100
PSRR > 70dB
0
0.3
0.9
0.6
1.2
1.5
0 0.40.2 0.6 0.8 1.0
OUTPUT SINKING CURRENT
vs. OUTPUT VOLTAGE
MAX4289 toc16
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
V
CC
= 1V
SINKING CURRENT
0
5
15
10
20
25
0 1.00.5 1.5 2.0 2.5 3.0
OUTPUT SINKING CURRENT
vs. OUTPUT VOLTAGE
MAX4289 toc17
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
V
CC
= 3V
SINKING CURRENT
0
0.2
0.6
0.4
0.8
1.0
0 0.40.2 0.6 0.8 1.0
OUTPUT SOURCING CURRENT
vs. OUTPUT VOLTAGE
MAX4289 toc18
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
V
CC
= 1V
SOURCING CURRENT
0
5
15
10
20
25
0 1.00.5 1.5 2.0 2.5 3.0
OUTPUT SOURCING CURRENT
vs. OUTPUT VOLTAGE
MAX4289 toc19
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
V
CC
= 3V
SOURCING CURRENT
Typical Operating Characteristics (continued)
(V
CC
= 3V, V
CM
= 0, R
L
to V
CC
/2, T
A
= +25°C, unless otherwise noted.)
MAX4289
Detailed Description
The MAX4289 consumes ultra-low power (9µA supply
current typically) and has a rail-to-rail output stage that
is specifically designed for low-voltage operation. The
input common-mode voltage range extends from V
CC
-
0.2V to ground, although full rail-to-rail input range is
possible with degraded performance. The input offset
voltage is typically 200µV. Low-operating supply volt-
age, low supply current, and rail-to-rail outputs make
this operational amplifier an excellent choice for preci-
sion or general-purpose, low-voltage, battery-powered
systems.
Rail-to-Rail Output Stage
The MAX4289 output stage can drive a 5kΩ load and
still swing to within 7mV of the rails. Figure 1 shows the
output voltage swing of the MAX4289 configured as a
unity-gain buffer, powered from a single 2V supply volt-
age. The output for this setup typically swings from
+0.4mV to (V
CC
- 0.2mV) with a 100kΩ load.
Applications Information
Power-Supply Considerations
The MAX4289 operates from a single 1.0V to 5.5V supply
and consumes only 9µA of supply current. A high power-
supply rejection ratio of 75dB allows the amplifier to be
powered directly off a decaying battery voltage, simplify-
ing design and extending battery life. The MAX4289 is
ideally suited for single-cell battery-powered systems.
Figures 2 and 3 show the supply current and PSRR as a
function of supply voltage and temperature.
1.0V Micropower, SOT23, Operational Amplifier
6 _______________________________________________________________________________________
Pin Description
PIN
SO SOT23
NAME FUNCTION
1, 5, 8 5 N.C. No Connection. Not internally connected.
2 4 IN- Inverting Input
3 3 IN+ Noninverting Input
4 2 GND Ground
6 1 OUT Amplifier Output
76V
CC
Positive Supply. Bypass with a 0.1µF capacitor to GND.
200µs/div
IN
500mV/div
OUT
500mV/div
V
IN
= 2.0V
f
IN
= 1kHz
R
L
= 100kΩ
Figure 1. Rail-to-Rail Input/Output Voltage Range
0
5
15
10
20
25
021 3456
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
Figure 2. I
CC
vs. V
CC
Over the Temperature Range
P1-P3P4-P6P7-P9

MAX4289ESA+T

Mfr. #:
Buy MAX4289ESA+T
Manufacturer:
Maxim Integrated
Description:
Operational Amplifiers - Op Amps 1.0V uPower
Lifecycle:
New from this manufacturer.
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