MAX4131EUA+ Maxim Integrated Products, MAX4131EUA+ Datasheet - Page 10

• Manufacturer Part Number: MAX4131EUA+
• Description: IC OP AMP SINGLE 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX4131EUA+

• Amplifier Type: General Purpose
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 4 V/µs
• Gain Bandwidth Product: 10MHz
• Current - Input Bias: 50nA
• Voltage - Input Offset: 350µV
• Current - Supply: 1mA
• Current - Output / Channel: 50mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 6.5 V, ±1.35 V ~ 3.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Number Of Channels: 1
• Voltage Gain Db: 108 dB
• Common Mode Rejection Ratio (min): 68 dB
• Input Offset Voltage: 1.2 mV
• Operating Supply Voltage: 3 V, 5 V
• Supply Current: 1.15 mA
• Maximum Power Dissipation: 330 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Dual Supply Voltage: +/- 3.25 V
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details

Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply, Rail-to-Rail I/O Op Amps
Devices in the MAX4130–MAX4134 family of high-
speed amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply opera-
tion. The input stage consists of separate NPN and
PNP differential stages that combine to provide an
input common-mode range that extends 0.2V beyond
the supply rails. The PNP stage is active for input volt-
ages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The input
offset voltage is typically below 200µV. The switchover
transition region, which occurs near V
extended to minimize the slight degradation in com-
mon-mode rejection ratio caused by the mismatch of
the input pairs. Their low offset voltage, high band-
width, and rail-to-rail common-mode range make these
op amps excellent choices for precision, low-voltage
data-acquisition systems.
Since the input stage switches between the NPN and
PNP pairs, the input bias current changes polarity as
the input voltage passes through the transition region.
Figure 2. Input Protection Circuit
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Applications Information
Rail-to-Rail Input Stage
1kΩ
1kΩ
CC
/ 2, has been
Reduce the offset error caused by input bias currents
flowing through external source impedances by match-
ing the effective impedance seen by each input
(Figures 1a, 1b). High source impedances, together
with input capacitance, can create a parasitic pole that
produces an underdamped signal response. Reducing
the input impedance or placing a small (2pF to 10pF)
capacitor across the feedback resistor improves
response.
The MAX4130–MAX4134s’ inputs are protected from
large differential input voltages by 1kΩ series resistors
and back-to-back triple diodes across the inputs
(Figure 2). For differential input voltages less than 1.8V,
input resistance is typically 500kΩ. For differential input
voltages greater than 1.8V, input resistance is approxi-
mately 2kΩ. The input bias current is given by the fol-
lowing equation:
I
BIAS
=
V
DIFF
2k
- 1.8V
Ω