MAX1274CTC Maxim Integrated, MAX1274CTC Datasheet

MAX1274CTC

Manufacturer Part Number

MAX1274CTC

Description

Analog to Digital Converters - ADC

Manufacturer

Maxim Integrated

Datasheet

1.MAX1274CTC.pdf (18 pages)

Specifications of MAX1274CTC

Number Of Channels

Architecture

SAR

Conversion Rate

1800 KSPs

Resolution

12 bit

Input Type

Differential

Snr

70 dB

Interface Type

QSPI, Serial (SPI, Microwire)

Operating Supply Voltage

4.75 V to 5.25 V

Maximum Power Dissipation

1349 mW

Number Of Converters

Voltage Reference

5.25 V

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The MAX1274/MAX1275 low-power, high-speed, serial-

output, 12-bit, analog-to-digital converters (ADCs) oper-

ate at up to 1.8Msps. These devices feature true-differen-

tial inputs, offering better noise immunity, distortion

improvements, and a wider dynamic range over single-

ended inputs. A standard SPI™/QSPI™/MICROWIRE™

interface provides the clock necessary for conversion.

These devices easily interface with standard digital signal

processor (DSP) synchronous serial interfaces.

The MAX1274/MAX1275 operate from a single +4.75V to

+5.25V supply voltage and require an external reference.

The MAX1274 has a unipolar analog input, while the

MAX1275 has a bipolar analog input. These devices fea-

ture a partial power-down mode and a full power-down

mode for use between conversions, which lower the sup-

ply current to 1mA (typ) and 1µA (max), respectively. Also

featured is a separate power-supply input (V

allows direct interfacing to +1.8V to V

fast conversion speed, low-power dissipation, excellent

AC performance, and DC accuracy (±1 LSB INL) make

the MAX1274/MAX1275 ideal for industrial process con-

trol, motor control, and base-station applications.

The MAX1274/MAX1275 come in a 12-pin TQFN pack-

age, and are available in the extended (-40°C to +85°C)

temperature range.

19-3158; Rev 1; 4/09

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

TOP VIEW

Data Acquisition

Bill Validation

Motor Control

RGND

AIN-

REF

________________________________________________________________ Maxim Integrated Products

AIN+

General Description

MAX1274

MAX1275

TQFN

N.C.

Pin Configuration

N.C.

1.8Msps, Single-Supply, Low-Power,

Communications

Portable Instruments

SCLK

GND

Applications

digital logic. The

CNVST

DOUT

True-Differential, 12-Bit ADCs

), which

♦ 1.8Msps Sampling Rate

♦ Only 45mW (typ) Power Dissipation

♦ Only 1µA (max) Shutdown Current

♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface

♦ 70dB S/(N + D) at 525kHz Input Frequency

♦ Internal True-Differential Track/Hold (T/H)

♦ External Reference

♦ No Pipeline Delays

♦ Small 12-Pin TQFN Package

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

T = Tape and reel.

MAX1274AETC+T

MAX1274BETC+T

MAX1275AETC+T

MAX1275BETC+T

+4.75V TO +5.25V

REF

4.7μF

DIFFERENTIAL

10μF

PART

VOLTAGE

INPUT

0.01μF

Typical Operating Circuit

0.01μF

-40°C to +85°C 12 TQFN

TEMP RANGE

AIN+

AIN-

REF

Ordering Information

RGND

MAX1274

MAX1275

+1.8V TO V

GND

CNVST

DOUT

0.01μF

SCLK

PIN-

PACKAGE

Features

10μF

Unipolar

μC/DSP

Bipolar

INPUT

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