MAX9943AUA+ Maxim Integrated Products, MAX9943AUA+ Datasheet - Page 7
![IC OPAMP PREC LP/HV SGL 8-MSOP](/photos/1/39/13936/406-8-msop_sml.jpg)
MAX9943AUA+
Manufacturer Part Number
MAX9943AUA+
Description
IC OPAMP PREC LP/HV SGL 8-MSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX9943EVKIT.pdf
(15 pages)
Specifications of MAX9943AUA+
Amplifier Type
General Purpose
Number Of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
0.35 V/µs
Gain Bandwidth Product
2.4MHz
Current - Input Bias
4nA
Voltage - Input Offset
20µV
Current - Supply
550µA
Current - Output / Channel
20mA
Voltage - Supply, Single/dual (±)
6 V ~ 38 V, ±3 V ~ 19 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Number Of Channels
1
Input Offset Voltage
10 uV
Input Bias Current (max)
4 nA
Common Mode Rejection Ratio (min)
125 dB
Operating Supply Voltage
+/- 3 V to +/- 19 V
Supply Current
550 uA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Input Voltage
6 V to 38 V
Maximum Power Dissipation
387.8 mW
Mounting Style
SMD/SMT
Operating Temperature Range
- 40 C to + 125 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX9943/MAX9944 are single/dual operational
amplifiers designed for industrial applications. They
operate from 6V to 38V supply range while maintaining
excellent performance. These devices utilize a three-
stage architecture optimized for low offset voltage and
low input noise with only 550µA supply current. The
devices are unity gain stable with a 1nF capacitive
load. These well-matched devices guarantee the high
open-loop gain, CMRR, PSRR, and low voltage offset.
The MAX9943/MAX9944 provide a wide input/output
voltage range. The input terminals of the MAX9943/
MAX9944 are protected from excessive differential volt-
age with back-to-back diodes. The input signal current
is also limited by an internal series resistor. With a 40V
differential voltage, the input current is limited to 20mA.
The output can swing to the negative rail while deliver-
ing 20mA of current, which is ideal for loop-powered
system applications. The specifications and operation
of the MAX9943/MAX9944 family is guaranteed over the
-40°C to +125°C temperature range.
6 TDFN-EP
MAX9943
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2
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6
High-Voltage, Precision, Low-Power Op Amps
MAX9943
8 µMAX
1, 5, 8
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7
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Detailed Description
8 SO/TDFN-EP
MAX9944
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7
4
3
5
2
6
8
NAME
OUTA
OUTB
INA+
INB+
OUT
INA-
INB-
N.C.
V
V
IN+
IN-
EP
CC
EE
Output
Output A
Output B
Negative Power Supply. Bypass with a 0.1µF capacitor to ground.
Positive Input
Positive Input A
Positive Input B
Negative Input
Negative Input A
Negative Input B
No Connection
Positive Power Supply. Bypass with a 0.1µF capacitor to ground.
Exposed Pad (TDFN Only). Connect to a large ground plane to
maximize thermal performance. Not intended as an electrical
connection point.
The MAX9943/MAX9944 use an internal bias current
cancellation circuit to achieve very low bias current over
a wide input common-mode range. For such a circuit to
function properly, the input common mode must be at
least 300mV away from the negative supply V
input common mode can reach the negative supply
V
0.3V, there is an increase in bias current for both inputs.
Driving large capacitive loads can cause instability in
many op amps. The MAX9943/MAX9944 are stable with
capacitive loads up to 1nF. The Capacitive Load vs.
Resistive Load graph in the Typical Operating
Characteristics gives the stable operation region for
capacitive versus resistive loads. Stability with higher
capacitive loads can be improved by adding an isola-
tion resistor in series with the op-amp output, as shown
in Figure 1. This resistor improves the circuit’s phase
margin by isolating the load capacitor from the amplifi-
er’s output.
EE
. However, in the region between V
Bias Current vs. Input Common Mode
Application Information
FUNCTION
Capacitive Load Stability
Pin Description
EE
and V
EE
. The
EE
7
+