MAX4285ESA+ Maxim Integrated Products, MAX4285ESA+ Datasheet - Page 11

• Manufacturer Part Number: MAX4285ESA+
• Description: IC ADC BUFFER AMP 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX4285ESA+

• Amplifier Type: Buffer
• Number Of Circuits: 1
• Slew Rate: 385 V/µs
• -3db Bandwidth: 220MHz
• Current - Input Bias: 13µA
• Voltage - Input Offset: 100µV
• Current - Supply: 23mA
• Current - Output / Channel: 106mA
• Voltage - Supply, Single/dual (±): 2.85 V ~ 6.5 V, ±1.425 V ~ 3.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Channels: 1
• Voltage Gain Db: 94 dB
• Common Mode Rejection Ratio (min): 50 dB
• Input Offset Voltage: 0.1 mV
• Operating Supply Voltage: 3 V, 5 V
• Maximum Power Dissipation: 471 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
• Output Type: -
• Gain Bandwidth Product: -
• Lead Free Status / Rohs Status: Details

The MAX4285–MAX4288 and MAX4387/MAX4388 are
voltage-feedback op amps, intended for use as ADC
input buffers. They operate from a single +2.85V to
+6.5V supply or dual ±1.425V to ±3.25V supplies. Their
high output drive, wide bandwidth, fast settling, low
noise, and low distortion make them ideal for the brutal
task of meeting the dynamic input drive requirements of
high-speed ADCs or other demanding applications.
The MAX4285/MAX4286/MAX4288 and MAX4388 have
a high-speed disable mode that places the outputs in a
high-impedance state and lowers operating supply cur-
rent to 1mA. The enable time is typically 40ns, and the
disable time is typically 50ns. The MAX4285/MAX4286
have a single enable pin (DISABLE), and the MAX4288/
SOT23-6
6-PIN
+3V/+5V, 250MHz, SOT23 ADC Buffer Amplifiers
—
—
—
—
—
—
—
—
—
1
2
3
4
5
6
MAX4285
MAX4286
8-PIN
1, 5
SO
—
—
—
—
—
—
—
—
______________________________________________________________________________________
7
6
4
3
2
8
Detailed Description
MAX4287
MAX4387
µMAX/SO
PIN
8-PIN
—
—
—
—
—
—
—
8
1
2
3
5
6
7
4
10-PIN
µMAX
—
—
—
—
—
10
5
6
1
2
3
7
8
9
4
MAX4288
MAX4388
5, 7, 8, 10
14-PIN
SO
—
—
—
—
14
11
12
13
6
9
1
2
3
4
with High-Speed Disable
MAX4388 have dual disable pins (DISABLEA, DISA-
BLEB).
The MAX4285/MAX4287/MAX4288 are internally com-
pensated for unity-gain stability. The MAX4286/
MAX4387/MAX4388 are compensated for gains of
+5V/V or greater.
Select the gain-setting feedback (R
resistor values considering the following criteria: large
resistor values increase voltage noise and interact with
the amplifier’s input and PC board capacitance to
effect system bandwidth. This generates undesirable
poles and zeros that decrease bandwidth or cause
oscillations.
Inverting and Noninverting Configurations
DISABLEA
DISABLEB
DISABLE
NAME
OUTA
OUTB
INA+
INB+
N.C.
OUT
INA-
INB-
V
V
IN+
IN-
CC
EE
Applications Information
Not Internally Connected. Connect to
ground or leave unconnected.
Amplifier Output
Negative Power Supply, or Ground in
Single-Supply Operation
Noninverting Input
Inverting Input
Disable (active low)
Disable Amplifier A (active low)
Disable Amplifier B (active low)
Positive Power Supply
Amplifier A Output
Amplifier A Inverting Input
Amplifier A Noninverting Input
Amplifier B Noninverting Input
Amplifier B Inverting Input
Amplifier B Output
Pin Description
FUNCTION
F
) and input (R
G
11
)