MAX4337EUA Maxim Integrated Products, MAX4337EUA Datasheet - Page 12

• Manufacturer Part Number: MAX4337EUA
• Description: Op Amps 50mA IOUT Rail-Rail w/Shutdown/Mute
• Manufacturer: Maxim Integrated Products

Specifications of MAX4337EUA

• Number Of Channels: 2
• Voltage Gain Db: 95 dB
• Common Mode Rejection Ratio (min): 60 dB
• Input Offset Voltage: 3 mV
• Operating Supply Voltage: 3 V or 5 V
• Maximum Power Dissipation: 362 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: uMAX
• Minimum Operating Temperature: - 40 C

SC70/SOT23-8, 50mA I
Op Amps with Shutdown/Mute
Figure 5. Input Protection Circuit
Figures 8 and 9 show the transient response with
excessive capacitive loads (330pF), with and without
the addition of an isolation resistor in series with the
output. Figure 10 shows a typical noninverting capaci-
tive-load-driving circuit in the unity-gain configuration.
The resistor improves the circuit’s phase margin by iso-
lating the load capacitor from the op amp’s output.
The MAX4336/MAX4338 have a shutdown option.
When the shutdown pin (SHDN) is pulled low, supply
current drops to 0.04µA per amplifier (V
amplifiers are disabled, and their outputs are placed in
a high-impedance state. Pulling SHDN high enables
the amplifier. In the dual MAX4338, the two amplifiers
shut down independently. Figure 11 shows the
MAX4336’s output voltage response to a shutdown
pulse. The MAX4335–MAX4338 typically settle within
5µs after power-up (Figure 12).
The MAX4335–MAX4338 can operate from a single
2.7V to 5.5V supply. Bypass the power supply with a
0.1µF ceramic capacitor in parallel with at least 1µF.
Good layout improves performance by decreasing the
amount of stray capacitance at the op amps’ inputs
and outputs. Decrease stray capacitance by placing
external components close to the op amps’ input/output
pins, minimizing trace and lead lengths.
12
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Power-Up and Shutdown/Mute Modes
Power Supplies and Layout
4.2k
4.2k
CC
= 5V), the
OUT
The MAX4335–MAX4338 includes thermal overload
protection circuitry. When the junction temperature of
the device exceeds +140°C, the supply current drops
to 120µA per amplifier (V
placed in a high-impedance state. The device returns
to normal operation when the junction temperature falls
to below +120°C.
The MAX4335–MAX4338 incorporate a smart short-cir-
cuit protection feature. Figure 7 shows the output volt-
age region where the protection circuitry is active. A
fault condition occurs when I
1V (sinking current) or when I
V
ed, the short-circuit protection circuitry is activated and
the output current is limited to 110mA, protecting the
device and the application circuitry. When the smart
short circuit is not active, the output current can safely
exceed 110mA (see the Output Current vs. Output
Voltage Graph in the Typical Operating Characteristics).
OUT
, Rail-to-Rail I/O
) > 1V (sourcing current). When a fault is detect-
Short-Circuit Current Protection
Thermal Overload Protection
CC
OUT
= 5V) and the outputs are
OUT
> 110mA and V
> 110mA and (V
OUT
CC
>
-