MAX4043 Maxim, MAX4043 Datasheet - Page 8

• Manufacturer Part Number: MAX4043
• Description: The MAX4040–MAX4044 family of micropower op amps operates from a single +2
• Manufacturer: Maxim

Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
The MAX4040–MAX4044 have rail-to-rail inputs and
rail-to-rail output stages that are specifically designed
for low-voltage, single-supply operation. The input
stage consists of separate NPN and PNP differential
stages, which operate together to provide a common-
mode range extending to both supply rails. The
crossover region of these two pairs occurs halfway
between V
cally 200µV. Low operating supply voltage, low supply
current, rail-to-rail common-mode input range, and rail-
to-rail outputs make this family of operational amplifiers
8
______________________________________________________________Pin Description
_______________Detailed Description
SOT23-5
_______________________________________________________________________________________
—
—
—
—
—
—
—
—
—
1
2
3
4
5
MAX4040
CC
SO/µMAX
1, 5, 8
and V
—
—
—
—
—
—
—
—
6
4
3
2
7
EE
. The input offset voltage is typi-
MAX4041
Rail-to-Rail Input Stage
1, 5
—
—
—
—
—
—
—
6
4
3
2
7
8
PIN
MAX4042
1, 7
2, 6
3, 5
—
—
—
—
—
—
—
—
—
4
8
µMAX
1, 9
2, 8
3, 7
5, 6
10
—
—
—
—
—
—
—
—
4
MAX4043
8, 10
1, 13
2, 12
3, 11
5, 7,
6, 9
SO
14
—
—
—
—
—
—
—
4
an excellent choice for precision or general-purpose,
low-voltage battery-powered systems.
Since the input stage consists of NPN and PNP pairs,
the input bias current changes polarity as the common-
mode voltage passes through the crossover region.
Match the effective impedance seen by each input to
reduce the offset error caused by input bias currents
flowing through external source impedances (Figures
1a and 1b). The combination of high source impedance
plus input capacitance (amplifier input capacitance
plus stray capacitance) creates a parasitic pole that
produces an underdamped signal response. Reducing
input capacitance or placing a small capacitor across
the feedback resistor improves response in this case.
MAX4044
10, 12
8, 14
9, 13
1, 7
2, 6
3, 5
11
—
—
—
—
—
—
4
SHDNA,
SHDNB
OUTA,
OUTC,
NAME
SHDN
OUTB
OUTD
INA+,
INC+,
INA-,
INB+
INC-,
IND+
OUT
N.C.
INB-
IND-
V
V
IN+
IN-
CC
EE
Amplifier Output. High impedance
when in shutdown mode.
Negative Supply. Tie to ground for
single-supply operation.
Noninverting Input
Inverting Input
Positive Supply
No Connection. Not internally con-
nected.
Shutdown Input. Drive high, or tie to
V
to place device in shutdown mode.
Outputs for Amplifiers A and B. High
impedance when in shutdown mode.
Inverting Inputs to Amplifiers A and B
Noninverting Inputs to Amplifiers A
and B
Shutdown Inputs for Amplifiers A
and B. Drive high, or tie to V
normal operation. Drive to V
place device in shutdown mode.
Outputs for Amplifiers C and D
Inverting Inputs to Amplifiers C and D
Noninverting Inputs to Amplifiers C
and D
CC
for normal operation. Drive to V
FUNCTION
EE
CC
to
for
EE