AD7477SRTZ-REEL7 datasheet, PDF

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AD7477SRTZ-REEL7: DescriptionIC 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO6, PLASTIC, MO-178AB, SOT-23, 6 PIN, Analog to Digital Converter; CategoryAnalog mixed-signal IC converter; File Size323KB，24 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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AD7477SRTZ-REEL7 Overview

IC 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO6, PLASTIC, MO-178AB, SOT-23, 6 PIN, Analog to Digital Converter

AD7477SRTZ-REEL7 Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	ADI
Parts packaging code	SOIC
package instruction	PLASTIC, MO-178AB, SOT-23, 6 PIN
Contacts	6
Reach Compliance Code	unknown
ECCN code	3A001.A.2.C
Maximum analog input voltage	3 V
Minimum analog input voltage
Maximum conversion time	0.8 µs
Converter type	ADC, SUCCESSIVE APPROXIMATION
JESD-30 code	R-PDSO-G6
JESD-609 code	e4
length	2.9 mm
Maximum linear error (EL)	0.0977%
Number of analog input channels	1
Number of digits	10
Number of functions	1
Number of terminals	6
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Output bit code	BINARY
Output format	SERIAL
Package body material	PLASTIC/EPOXY
encapsulated code	LSSOP
Encapsulate equivalent code	TSOP6,.11,37
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT APPLICABLE
power supply	2.5/5 V
Certification status	Not Qualified
Sampling rate	1 MHz
Sample and hold/Track and hold	TRACK
Maximum seat height	1.45 mm
Nominal supply voltage	3 V
surface mount	YES
technology	CMOS
Temperature level	MILITARY
Terminal surface	NICKEL PALLADIUM GOLD
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT APPLICABLE
width	1.6 mm
Base Number Matches	1

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1 MSPS, 12-/10-/8-Bit ADCs

in 6-Lead SOT-23

AD7476/AD7477/AD7478

FEATURES

Fast throughput rate: 1 MSPS

Specified for V

of 2.35 V to 5.25 V

Low power

3.6 mW at 1 MSPS with 3 V supplies

15 mW at 1 MSPS with 5 V supplies

Wide input bandwidth

70 dB SNR at 100 kHz input frequency

Flexible power/serial clock speed management

No pipeline delays

High speed serial interface

SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

Standby mode: 1 μA maximum

6-lead SOT-23 package

FUNCTIONAL BLOCK DIAGRAM

12-/10-/8-BIT

SUCCESSIVE-

APPROXIMATION

ADC

SCLK

CONTROL

LOGIC

SDATA

AD7476/AD7477/AD7478

GND

01024-001

Figure 1.

APPLICATIONS

Battery-powered systems

Personal digital assistants

Medical instruments

Mobile communications

Instrumentation and control systems

Data acquisition systems

High speed modems

Optical sensors

GENERAL DESCRIPTION

The AD7476/AD7477/AD7478

are, respectively, 12-bit, 10-bit,

and 8-bit, high speed, low power, successive approximation

ADCs. The parts operate from a single 2.35 V to 5.25 V power

supply and feature throughput rates up to 1 MSPS. Each part

contains a low noise, wide bandwidth track-and-hold amplifier

that can handle input frequencies in excess of 6 MHz.

The conversion process and data acquisition are controlled

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

with microprocessors or DSPs. The input signal is sampled on

the falling edge of CS and the conversion is initiated at this

point. There are no pipeline delays associated with these parts.

The AD7476/AD7477/AD7478 use advanced design techniques

to achieve very low power dissipation at high throughput rates.

The reference for the parts is taken internally from V

. This

allows the widest dynamic input range to the ADC. Thus, the

analog input range for the parts are 0 V to V

. The conversion

rate is determined by the SCLK.

PRODUCT HIGHLIGHTS

First 12-/10-/8-Bit ADCs in SOT-23 Packages.

High Throughput with Low Power Consumption.

Flexible Power/Serial Clock Speed Management. The

conversion rate is determined by the serial clock, allowing

the conversion time to be reduced through the serial clock

speed increase. This allows the average power consumption

to be reduced while not converting. The parts also feature a

shutdown mode to maximize power efficiency at lower

throughput rates. Current consumption is 1 μA maximum

when in shutdown mode.

Reference Derived from the Power Supply.

No Pipeline Delay. The parts feature a standard successive-

approximation ADC with accurate control of the sampling

instant via a CS input and once-off conversion control.

Protected by U.S. Patent No. 6,681,332.

Rev. F

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. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700

www.analog.com

AD7476/AD7477/AD7478

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

AD7476 Specifications ................................................................. 3

AD7477 Specifications ................................................................. 5

AD7478 Specifications ................................................................. 7

Timing Specifications .................................................................. 8

Absolute Maximum Ratings............................................................ 9

ESD Caution .................................................................................. 9

Pin Configuration and Function Descriptions ........................... 10

Typical Performance Characteristics ........................................... 11

Terminology .................................................................................... 12

Theory of Operation ...................................................................... 13

Circuit Information.................................................................... 13

Converter Operation.................................................................. 13

ADC Transfer Function ............................................................. 13

Typical Connection Diagram ................................................... 14

Modes of Operation ................................................................... 15

Power vs. Throughput Rate ....................................................... 17

Serial Interface ............................................................................ 18

Microprocessor Interfacing ....................................................... 19

Outline Dimensions ....................................................................... 21

Ordering Guide .......................................................................... 22

REVISION HISTORY

1/09—Rev. E to Rev. F

Changes to Features.......................................................................... 1

Changes to Ordering Guide .......................................................... 22

4/06—Rev. D to Rev. E

Updated Format .................................................................. Universal

Changes to Table 1 Endnotes .......................................................... 3

Changes to Table 2 Endnotes .......................................................... 5

Changes to Table 3 Endnotes .......................................................... 7

Updated Outline Dimensions ....................................................... 21

Changes to Ordering Guide .......................................................... 22

3/04—Rev. C to Rev. D

Added U.S. Patent Number ..............................................................1

Changes to Specifications .................................................................2

Changes to Absolute Maximum Ratings ........................................6

Changes to AD7476/AD7477/AD7478 to ADSP-21xx

Interface section.............................................................................. 16

2/03—Rev. B to Rev. C

Changes to General Description .....................................................1

Changes to Specifications .................................................................2

Changes to Absolute Maximum Ratings ........................................6

Changes to Ordering Guide .............................................................6

Changes to Typical Connection Diagram section ..................... 10

Changes to Figure 8 caption.......................................................... 11

Changes to Figure 19...................................................................... 16

Changes to Figure 20...................................................................... 17

Updated Outline Dimensions ....................................................... 18

Rev. F | Page 2 of 24

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