MAX4075 Maxim, MAX4075 Datasheet - Page 10

• Manufacturer Part Number: MAX4075
• Description: The MAX4074–MAX4078 GainAmp™ op amp family combines low-cost rail-to-rail op amps with precision internal gain-setting resistors
• Manufacturer: Maxim

Maxim’s GainAmp fixed-gain amplifiers combine a low-
cost rail-to-rail op amp with internal gain-setting resis-
tors. Factory-trimmed on-chip resistors provide 0.1%
gain accuracy while decreasing design size, cost, and
layout. There are two versions in this amplifier family:
single/dual/quad open-loop, unity-gain-stable devices
(MAX4076/MAX4077/MAX4078), and single/dual fixed-
gain devices (MAX4074/MAX4075). All amplifiers fea-
ture rail-to-rail outputs and drive a 10kΩ load while
maintaining excellent DC accuracy.
The single/dual/quad MAX4076/MAX4077/MAX4078 are
low-power, open-loop op amps with rail-to-rail outputs.
These devices are compensated for unity-gain stability
and feature a GBW product of 230kHz. The common-
mode range extends from 150mV below the negative
rail to within 1.2V of the positive rail. These high-perfor-
mance op amps serve as the core for this family of
GainAmp fixed-gain amplifiers. Although the -3dB band-
width will not correspond to that of a fixed-gain amplifier
in higher gain configurations, these open-loop op amps
can be used to prototype designs.
Micropower, SOT23, Rail-to-Rail,
Fixed-Gain, GainAmp/Open-Loop Op Amps
10
_______________Detailed Description
SOT23
MAX4074/MAX4076
______________________________________________________________________________________
—
1
2
3
4
5
1, 5, 8
SO
6
4
3
2
7
PIN
MAX4075
MAX4077
µMAX/SO
Open-Loop Op Amps
1, 7
3, 5
2, 6
—
4
8
SO/TSSOP
3, 5, 10, 12
MAX4078
2, 6, 9, 13
1, 7, 8, 14
11
—
4
NAME
OUT_
N.C.
IN_+
IN_-
V
V
Maxim’s proprietary laser trimming techniques allow
R
gain configurations. These GainAmp fixed-gain ampli-
fiers feature a negative-feedback resistor network that
is laser trimmed to provide a gain-setting feedback
ratio (R
op amp pinouts allow the GainAmp fixed-gain ampli-
fiers to plug directly into existing board designs, easily
replacing op amps-plus-resistor gain blocks.
CC
EE
Figure 1. Internal Gain-Setting Resistors
F
/R
IN+
IN-
G
values (Figure 1) that produce many different
F
/R
Amplifier Output
Negative Supply or Ground
Noninverting Amplifier Input
Inverting Amplifier Input
Positive Supply
No Connection. Not internally connected.
G
R
) with 0.1% typical accuracy. The standard
G
Internal Gain-Setting Resistors
V
V
CC
EE
R
F
FUNCTION
Pin Description
A
A
V
V
=
= 1 +
-R
R
F
G
R
R
OUT
F
G