AD7450BRMZ Analog Devices Inc, AD7450BRMZ Datasheet

AD7450BRMZ

Manufacturer Part Number

AD7450BRMZ

Description

3V/5V DIFFERENTIAL INPUT 12 BIT SAR IC

Manufacturer

Analog Devices Inc

Datasheet

1.AD7450AR-REEL7.pdf (20 pages)

Specifications of AD7450BRMZ

Rohs Compliant

YES

Number Of Bits

Sampling Rate (per Second)

Data Interface

DSP, MICROWIRE™, QSPI™, Serial, SPI™

Number Of Converters

Power Dissipation (max)

9.25mW

Voltage Supply Source

Single Supply

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD7450CBZ - BOARD EVALUATION FOR AD7450

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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GENERAL DESCRIPTION

The AD7450 is a 12-bit, high-speed, low power, successive

approximation (SAR) analog-to-digital converter that features a

fully differential analog input. It operates from a single 3 V or 5 V

power supply and features throughput rates up to 833 kSPS or

1 MSPS, respectively.

This part contains a low noise, wide bandwidth, differential track-

and-hold amplifier (T/H) that can handle input frequencies in

excess of 1 MHz with the –3 dB point typically being 20 MHz.

The reference voltage for the AD7450 is applied externally to the

on the power supply and what suits the application. The value of

the reference voltage determines the common-mode voltage

range of the part. With this truly differential input structure and

variable reference input, the user can select a variety of input

ranges and bias points.

The conversion and data acquisition processes are controlled

using CS and the serial clock, allowing the device to interface

with microprocessors or DSPs. The input signals are sampled

on the falling edge of CS, and the conversion is also initiated at

this point.

The SAR architecture of this part ensures that there are no

pipeline delays.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

REF

FEATURES

Fast Throughput Rate: 1 MSPS

Specified for V

Low Power at Max Throughput Rate:

Fully Differential Analog Input

Wide Input Bandwidth:

Flexible Power/Serial Clock Speed Management

No Pipeline Delays

High-Speed Serial Interface—SPI

Power-Down Mode: 1 A Max

8-Lead SOIC and SOIC Packages

APPLICATIONS

Transducer Interface

Battery-Powered Systems

Data Acquisition Systems

Portable Instrumentation

Motor Control

Communications

3.75 mW Max at 833 kSPS with 3 V Supplies

9 mW Max at 1 MSPS with 5 V Supplies

70 dB SINAD at 300 kHz Input Frequency

MICROWIRE

pin and can be varied from 100 mV to 3.5 V, depending

/DSP Compatible

of 3 V and 5 V

/QSPI

12-Bit ADC in SOIC-8 and SO-8

The AD7450 uses advanced design techniques to achieve low

power dissipation at high throughput rates.

PRODUCT HIGHLIGHTS

1. Operation with either 3 V or 5 V power supplies.

2. High throughput with low power consumption. With a 3 V

3. Fully differential analog input.

4. Flexible power/serial clock speed management. The conversion

5. Variable voltage reference input.

6. No pipeline delay.

7. Accurate control of the sampling instant via a CS input and

8. ENOB > 8 bits typically with 100 mV reference.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

supply, the AD7450 offers 3.75 mW max power consumption

for 833 kSPS throughput.

rate is determined by the serial clock, allowing the power

to be reduced as the conversion time is reduced through

the serial clock speed increase. This part also features a

shutdown mode to maximize power efficiency at lower

throughput rates.

once-off conversion control.

REF

IN+

IN–

Differential Input, 1 MSPS

FUNCTIONAL BLOCK DIAGRAM

GND

AD7450

T/H

12-BIT SUCCESSIVE

APPROXIMATION

CONTROL

LOGIC

ADC

AD7450

www.analog.com

SCLK

SDATA

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