MAX186ACAP(2012) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX186ACAP
(Rev.:2012)

Low-Power, 8-Channel, Serial 12-Bit ADCs

Maxim Integrated 

EVALUATION KIT AVAILABLE

MAX186/MAX188

Low-Power, 8-Channel,

Serial 12-Bit ADCs

General Description

The MAX186/MAX188 are 12-bit data-acquisition sys-

tems that combine an 8-channel multiplexer, high-

bandwidth track/hold, and serial interface together with

high conversion speed and ultra-low power consump-

tion. The devices operate with a single +5V supply or

dual ±5V supplies. The analog inputs are software con-

figurable for unipolar/bipolar and single-ended/differen-

tial operation.

The 4-wire serial interface directly connects to SPI,

QSPI™ and MICROWIRE® devices without external

logic. A serial strobe output allows direct connection to

TMS320 family digital signal processors. The

MAX186/MAX188 use either the internal clock or an

external serial-interface clock to perform successive-

approximation A/D conversions. The serial interface can

operate beyond 4MHz when the internal clock is used.

The MAX186 has an internal 4.096V reference while the

MAX188 requires an external reference. Both parts have

a reference-buffer amplifier that simplifies gain trim .

The MAX186/MAX188 provide a hard-wired SHDN pin

and two software-selectable power-down modes.

Accessing the serial interface automatically powers up

the devices, and the quick turn-on time allows the

MAX186/MAX188 to be shut down between every con-

version. Using this technique of powering down

between conversions, supply current can be cut to

under 10µA at reduced sampling rates.

The MAX186/MAX188 are available in 20-pin PDIP and

SO packages, and in a shrink small-outline package

(SSOP), that occupies 30% less area than an 8-pin

PDIP. For applications that call for a parallel interface,

see the MAX180/MAX181 data sheet. For anti-aliasing

filters, consult the MAX274/MAX275 data sheet.

________________________Applications

Portable Data Logging

Data-Acquisition

High-Accuracy Process Control

Automatic Testing

Robotics

Battery-Powered Instruments

Medical Instruments

QSPI is a trademark of Motorola.

MICROWIRE is a registered trademark of National

Semiconductor.

____________________________Features

o 8-Channel Single-Ended or 4-Channel

Differential Inputs

o Single +5V or ±5V Operation

o Low Power: 1.5mA (Operating Mode)

2µA (Power-Down Mode)

o Internal Track/Hold, 133kHz Sampling Rate

o Internal 4.096V Reference (MAX186)

o SPI-/QSPI-/MICROWIRE-/TMS320-Compatible

4-Wire Serial Interface

o Software-Configurable Unipolar or Bipolar Inputs

o 20-Pin PDIP, SO, SSOP Packages

o Evaluation Kit Available

Ordering Information

PART†

TEMP RANGE PIN-PACKAGE

MAX186_CPP+

0°C to +70°C 20 PDIP

MAX186_CWP+

0°C to +70°C 20 SO

MAX186_CAP+

0°C to +70°C 20 SSOP

MAX186DC/D

0°C to +70°C Dice*

MAX186_EPP+

-40°C to +85°C 20 PDIP

MAX186_EWP+

-40°C to +85°C 20 SO

MAX186_EAP+

-40°C to +85°C 20 SSOP

Ordering Information continued on last page.

†Parts are offered in grades A, B, C and D (grades defined in

Electrical Characteristics). When ordering, please specify grade.

Contact factory for availability of A-grade in SSOP package.

*Dice are specified at +25°C, DC parameters only.

+Denotes a lead(Pb)-free/RoHS-compliant package.

____________________Pin Configuration

TOP VIEW

+

CH0 1

CH1 2

CH2 3

CH3 4

CH4 5

MAX186

MAX188

CH5 6

CH6 7

CH7 8

VSS 9

SHDN 10

20 VDD

19 SCLK

18 CS

17 DIN

16 SSTRB

15 DOUT

14 DGND

13 AGND

12 REFADJ

11 VREF

PDIP/SO/SSOP

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-0123; Rev 5; 1/12

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