MAX9637 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX9637 Datasheet PDF : 12 Pages
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MAX9636/MAX9637/
MAX9638
3V/5V Low-Power, Low-Noise, CMOS,
Rail-to-Rail I/O Op Amps
For best performance, follow standard high-impedance
layout techniques, which include the following:
● Using shielding techniques to guard against parasitic
leakage paths. For example, put a trace connected to
the noninverting input around the inverting input.
● Minimizing the amount of stray capacitance connected
to op amp’s inputs to improve stability. To achieve this,
minimize trace lengths and resistor leads by plac-
ing external components as close as possible to the
package.
● Use separate analog and digital power supplies.
Applications Information
Shutdown Operation
The MAX9636/MAX9638 feature an active-low shutdown
mode that sends the inputs and output into high imped-
ance and substantially lowers the quiescent current.
Active-Low Input
The shutdown active-low (VIL) and high (VIH) threshold
voltages are designed for ease of integration with digital
controls, such as microcontroller outputs. These thresh-
olds are independent of supply, eliminating the need for
external pulldown circuitry.
Output During Shutdown
The MAX9636/MAX9638 output is in a high-impedance
state while SHDN is low. The device structure limits the
output leakage current in this state to 0.01μA when the
output is between 0V to VDD.
ADC Driver
The MAX9636/MAX9637/MAX9638 are low-power ampli-
fiers ideal for driving high to medium-resolution ADCs.
Figure 3 shows how the MAX9636 is connected to a pho-
todiode, with the amplifier output connected to additional
signal conditioning/filtering, or directly to the ADC. The
MAX1286–MAX1289 family of low-power, 12-bit ADCs
are ideal for connecting to the MAX9636/MAX9637/
MAX9638.
The MAX1286–MAX1289 ADCs offer sample rates up
to 150ksps, with 3V and 5V supplies, as well as 1- and
2-channel options. These ADCs dissipate just 15μA when
sampling at 10ksps and 0.2μA in shutdown. Offered in
tiny 8-pin SOT23 and 3mm x 3mm TDFN packages, the
MAX1286–MAX1289 ADCs are an ideal fit to pair with
the MAX9636/MAX9637/MAX9638 amplifiers in portable
applications.
Similarly, the MAX1086–MAX1089 is a family of 10-bit
pin-compatible low-power ADCs with the same 3V/5V, 1-
and 2-channel options. Table 1 details the amplifier and
ADC pairings for single- and dual-channel applications.
Chip Information
PROCESS: BiCMOS
Table 1. Recommended Amplifiers/ADCs
CHANNELS
1
2
2
AMPLIFIER
MAX9636
MAX9637
MAX9638
3V, 10 BIT
MAX1089
MAX1087
MAX1087
3V, 12 BIT
MAX1289
MAX1287
MAX1287
ADC
5V, 10 BIT
MAX1088
MAX1086
MAX1086
5V, 12 BIT
MAX1288
MAX1286
MAX1286
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
6 SC70
8 SC70
10 UTQFN
PACKAGE CODE
X6SN+1
X8CN+1
V101A1CN+1
OUTLINE NO.
21-0077
21-0460
21-0028
LAND PATTERN NO.
90-0189
90-0348
90-0287
www.maximintegrated.com
Maxim Integrated │ 11
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