MAX9636AXT-T(2011) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX9636AXT-T
(Rev.:2011)

3V/5V Low-Power, Low-Noise, CMOS, Rail-to-Rail I/O Op Amps

Maxim Integrated 

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:

U Using shielding techniques to guard against parasitic

leakage paths. For example, put a trace connected to

the noninverting input around the inverting input.

U Minimizing the amount of stray capacitance connect-

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.

U 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 out-

put leakage current in this state to 0.01µA when the out-

put 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.

PROCESS: BiCMOS

Chip Information

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

11

Share Link: