MAX9636 Maxim, MAX9636 Datasheet - Page 11

• Manufacturer Part Number: MAX9636
• Description: The MAX9636/MAX9637/MAX9638 are single-supply, CMOS input op amps featuring wide bandwidth at low quiescent current, making them suitable for a broad range of battery-powered applications such as portable medical instruments, portable media players,
• Manufacturer: Maxim

Table 1. Recommended Amplifiers/ADCs
For best performance, follow standard high-impedance
layout techniques, which include the following:
U Using shielding techniques to guard against parasitic
U Minimizing the amount of stray capacitance connect-
U Use separate analog and digital power supplies.
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.
The shutdown active-low (V
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.
The MAX9636/MAX9638 output is in a high-impedance
state while SHDN is low. The device structure limits the out-
put leakage current in this state to 0.01µA when the out-
put is between 0V to V
leakage paths. For example, put a trace connected to
the noninverting input around the inverting input.
ed to op amp’s inputs to improve stability. To achieve
this, minimize trace lengths and resistor leads by
placing external components as close as possible to
the package.
CHANNELS
1
2
2
Applications Information
DD
.
3V/5V Low-Power, Low-Noise, CMOS,
IL
AMPLIFIER
MAX9636
MAX9637
MAX9638
) and high (V
Output During Shutdown
Shutdown Operation
Active-Low Input
IH
) threshold
3V, 10 BIT
MAX1089
MAX1087
MAX1087
Rail-to-Rail I/O Op Amps
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.
PROCESS: BiCMOS
3V, 12 BIT
MAX1289
MAX1287
MAX1287
ADC
5V, 10 BIT
MAX1088
MAX1086
MAX1086
Chip Information
ADC Driver
5V, 12 BIT
MAX1288
MAX1286
MAX1286
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