AD7666AST datasheet, PDF - EEWORLD Datasheet

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AD7666AST: DescriptionIC 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48, MS-026BBC, LQFP-48, Analog to Digital Converter; CategoryAnalog mixed-signal IC converter; File Size531KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com

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AD7666AST Overview

IC 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48, MS-026BBC, LQFP-48, Analog to Digital Converter

AD7666AST Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	ADI
Parts packaging code	QFP
package instruction	LFQFP, QFP48,.35SQ,20
Contacts	48
Reach Compliance Code	not_compliant
ECCN code	EAR99
Maximum analog input voltage	2.5 V
Minimum analog input voltage
Maximum conversion time	1.25 µs
Converter type	ADC, SUCCESSIVE APPROXIMATION
JESD-30 code	S-PQFP-G48
JESD-609 code	e0
length	7 mm
Maximum linear error (EL)	0.0031%
Humidity sensitivity level	3
Number of analog input channels	1
Number of digits	16
Number of functions	1
Number of terminals	48
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Output bit code	BINARY, 2\'S COMPLEMENT BINARY
Output format	SERIAL, PARALLEL, WORD
Package body material	PLASTIC/EPOXY
encapsulated code	LFQFP
Encapsulate equivalent code	QFP48,.35SQ,20
Package shape	SQUARE
Package form	FLATPACK, LOW PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)	240
power supply	3/5,5 V
Certification status	Not Qualified
Sampling rate	0.5 MHz
Sample and hold/Track and hold	SAMPLE
Maximum seat height	1.6 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn85Pb15)
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	30
width	7 mm

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16-Bit 500 kSPS PulSAR

Unipolar ADC with Reference

AD7666

FEATURES

2.5 V internal reference: typical drift 3 ppm/°C

Guaranteed max drift 15 ppm/°C

Throughput: 500 kSPS

INL: ±2.0 LSB max (±0.0038% of full scale)

16-bit resolution with no missing codes

S/(N+D): 88 dB min @ 20 kHz

THD: –96 dB max @ 20 kHz

Analog input voltage range: 0 V to 2.5 V

Both AC and DC specifications

No pipeline delay

Parallel and serial 5 V/3 V interface

SPI

/QSPI

/MICROWIRE

/DSP compatible

Single 5 V supply operation

Power dissipation

66 mW typ, 132 µW @ 1 kSPS without REF

81 mW typ with REF

48-lead LQFP and 48-lead LFCSP packages

Pin-to-pin compatible with PulSAR ADCs

AGND

AVDD

REF

FUNCTIONAL BLOCK DIAGRAM

REFBUFIN REF REFGND

DVDD

DGND

OVDD

SERIAL

PORT

SWITCHED

CAP DAC

PARALLEL

INTERFACE

CLOCK

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

DATA[15:0]

BUSY

SER/PAR

03034-0-001

AD7666

OGND

INGND

PDREF

PDBUF

RESET

OB/2C

BYTESWAP

CNVST

Figure 1. Functional Block Diagram

Table 1. PulSAR Selection

Type/kSPS

Pseudo-

Differential

True Bipolar

True

Differential

18-Bit

Multichannel/

Simultaneous

100–250

AD7651

AD7660/AD7661

AD7663

AD7675

AD7678

500–570

AD7650/AD7652

AD7664/AD7666

AD7665

AD7676

AD7679

AD7654

AD7655

800–

1000

AD7653

AD7667

AD7671

AD7677

AD7674

APPLICATIONS

Data acquisition

Medical instruments

Digital signal processing

Spectrum analysis

Instrumentation

Battery-powered systems

Process control

PRODUCT HIGHLIGHTS

Fast Throughput.

The AD7666 is a 500 kSPS, charge redistribution, 16-bit

SAR ADC with internal error correction circuitry.

Superior INL.

The AD7666 has a maximum integral nonlinearity of

2.0 LSB with no missing 16-bit codes.

Internal Reference.

The AD7666 has an internal reference with a typical

temperature drift of 3 ppm/°C.

Single-Supply Operation.

The AD7666 operates from a single 5 V supply. Its power

dissipation decreases with throughput.

Serial or Parallel Interface.

Versatile parallel or 2-wire serial interface arrangement is

compatible with both 3 V and 5 V logic.

GENERAL DESCRIPTION

The AD7666* is a 16-bit, 500 kSPS, charge redistribution SAR

analog-to-digital converter that operates from a single 5 V

power supply. The part contains a high speed, 16-bit sampling

ADC, an internal conversion clock, internal reference, error

correction circuits, and both serial and parallel system inter-

face ports. The AD7666 is hardware factory-calibrated and

comprehensively tested to ensure ac parameters such as signal-

to-noise ratio (SNR) and total harmonic distortion (THD), in

addition to the more traditional dc parameters of gain, offset,

and linearity.

The AD7666 is available in a 48-lead LQFP and a tiny 48-lead

LFCSP, with operation specified from –40°C to +85°C.

Patent Pending.

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.

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

Fax: 781.326.8703

AD7666

TABLE OF CONTENTS

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

Timing Specifications....................................................................... 5

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Definitions of Specifications ......................................................... 11

Typical Performance Characteristics ........................................... 12

Circuit Information ........................................................................ 16

Converter Operation.................................................................. 16

Typical Connection Diagram ................................................... 18

Power Dissipation versus Throughput .................................... 20

Conversion Control.................................................................... 21

Digital Interface.......................................................................... 22

Parallel Interface......................................................................... 22

Serial Interface ............................................................................ 22

Master Serial Interface............................................................... 23

Slave Serial Interface .................................................................. 24

Microprocessor Interfacing....................................................... 26

Application Hints ........................................................................... 27

Bipolar and Wider Input Ranges .............................................. 27

Layout .......................................................................................... 27

Evaluating the AD7666’s Performance .................................... 27

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 28

REVISION HISTORY

Revision 0: Initial Version

Rev. 0 | Page 2 of 28

AD7666AST Related Products

	AD7666AST	AD7666ASTRL	AD7666ACP
Description	IC 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48, MS-026BBC, LQFP-48, Analog to Digital Converter	IC 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48, MS-026BBC, LQFP-48, Analog to Digital Converter	IC 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, QCC48, MO-220-VKKD-2, LFCSP-48, Analog to Digital Converter
Is it Rohs certified?	incompatible	incompatible	incompatible
Maker	ADI	ADI	ADI
Parts packaging code	QFP	QFP	QFN
package instruction	LFQFP, QFP48,.35SQ,20	LFQFP, QFP48,.35SQ,20	VQCCN, LCC48,.27SQ,20
Contacts	48	48	48
Reach Compliance Code	not_compliant	not_compliant	unknown
ECCN code	EAR99	EAR99	EAR99
Maximum analog input voltage	2.5 V	2.5 V	2.5 V
Maximum conversion time	1.25 µs	1.25 µs	1.25 µs
Converter type	ADC, SUCCESSIVE APPROXIMATION	ADC, SUCCESSIVE APPROXIMATION	ADC, SUCCESSIVE APPROXIMATION
JESD-30 code	S-PQFP-G48	S-PQFP-G48	S-XQCC-N48
JESD-609 code	e0	e0	e0
length	7 mm	7 mm	7 mm
Maximum linear error (EL)	0.0031%	0.0031%	0.0031%
Humidity sensitivity level	3	3	3
Number of analog input channels	1	1	1
Number of digits	16	16	16
Number of functions	1	1	1
Number of terminals	48	48	48
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Output bit code	BINARY, 2\'S COMPLEMENT BINARY	BINARY, 2\'S COMPLEMENT BINARY	BINARY, 2\'S COMPLEMENT BINARY
Output format	SERIAL, PARALLEL, WORD	SERIAL, PARALLEL, WORD	SERIAL, PARALLEL, WORD
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	UNSPECIFIED
encapsulated code	LFQFP	LFQFP	VQCCN
Encapsulate equivalent code	QFP48,.35SQ,20	QFP48,.35SQ,20	LCC48,.27SQ,20
Package shape	SQUARE	SQUARE	SQUARE
Package form	FLATPACK, LOW PROFILE, FINE PITCH	FLATPACK, LOW PROFILE, FINE PITCH	CHIP CARRIER, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	240	240	240
power supply	3/5,5 V	3/5,5 V	3/5,5 V
Certification status	Not Qualified	Not Qualified	Not Qualified
Sampling rate	0.5 MHz	0.5 MHz	0.5 MHz
Sample and hold/Track and hold	SAMPLE	SAMPLE	SAMPLE
Maximum seat height	1.6 mm	1.6 mm	1 mm
Nominal supply voltage	5 V	5 V	5 V
surface mount	YES	YES	YES
technology	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)
Terminal form	GULL WING	GULL WING	NO LEAD
Terminal pitch	0.5 mm	0.5 mm	0.5 mm
Terminal location	QUAD	QUAD	QUAD
Maximum time at peak reflow temperature	30	30	30
width	7 mm	7 mm	7 mm

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