AD7708BRU-REEL7 datasheet, PDF

Datasheet> All Categories > Analog mixed-signal IC> converter> AD7708BRU-REEL7

AD7708BRU-REEL7: Description10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, TSSOP-28; CategoryAnalog mixed-signal IC converter; File Size1012KB，45 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/

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AD7708BRU-REEL7 Overview

10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, TSSOP-28

AD7708BRU-REEL7 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Rochester Electronics
Parts packaging code	SSOP
package instruction	TSSOP,
Contacts	28
Reach Compliance Code	unknown
Maximum analog input voltage	2.56 V
Minimum analog input voltage	-2.56 V
Converter type	ADC, DELTA-SIGMA
JESD-30 code	R-PDSO-G28
JESD-609 code	e0
length	9.7 mm
Maximum linear error (EL)	0.0015%
Humidity sensitivity level	1
Number of analog input channels	10
Number of digits	16
Number of functions	1
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Output bit code	BINARY, OFFSET BINARY
Output format	SERIAL
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Maximum seat height	1.2 mm
Nominal supply voltage	3 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm

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AD7708/AD7718

TABLE OF CONTENTS

FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . 1

GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 1

AD7718 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 3

AD7708 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 6

TIMING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . 9

ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . 10

ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . 12

PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 13

ADC CIRCUIT INFORMATION . . . . . . . . . . . . . . . . . . . 15

Signal Chain Overview (CHOP Enabled, CHOP = 0) . . . 15

ADC NOISE PERFORMANCE CHOP ENABLED

(CHOP = 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Signal Chain Overview (CHOP Disabled CHOP = 1) . . . 19

ADC NOISE PERFORMANCE CHOP DISABLED

(CHOP = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

ON-CHIP REGISTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Communications Register . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Mode Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Operating Characteristics when Addressing the

Mode and Control Registers . . . . . . . . . . . . . . . . . . . . . . . 28

ADC Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Filter Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

I/O Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

ADC Data Result Register . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Unipolar Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Bipolar Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

ADC Offset Calibration Coefficient Registers . . . . . . . . . . . 31

ADC Gain Calibration Coefficient Register . . . . . . . . . . . . . 31

ID Register (ID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

User Nonprogrammable Test Registers . . . . . . . . . . . . . . . . 31

Configuring the AD7708/AD7718 . . . . . . . . . . . . . . . . . . . . 32

DIGITAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

MICROCOMPUTER/MICROPROCESSOR

INTERFACING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

AD7708/AD7718 to 68HC11 Interface . . . . . . . . . . . . . . . . 34

AD7708/AD7718-to-8051 Interface . . . . . . . . . . . . . . . . . . 35

AD7708/AD7718-to-ADSP-2103/ADSP-2105 Interface . . . 36

BASIC CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . 36

Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Single-Ended Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Chop Mode of Operation (CHOP = 0) . . . . . . . . . . . . . . . . 37

Nonchop Mode of Operation (CHOP = 1) . . . . . . . . . . . . . 38

Programmable Gain Amplifier . . . . . . . . . . . . . . . . . . . . . . . 38

Bipolar/Unipolar Configuration . . . . . . . . . . . . . . . . . . . . . . 38

Data Output Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Oscillator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

RESET

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Power-Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Grounding and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Data Acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Programmable Logic Controllers . . . . . . . . . . . . . . . . . . . . . 41

Converting Single-Ended Inputs. . . . . . . . . . . . . . . . . . . . . 42

Combined Ratiometric and Absolute Value

Measurement System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Optimizing Throughput while Maximizing 50 Hz

and 60 Hz Rejection in a Multiplexed Data

Acquisition System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . 44

–2–

REV. 0

AD7708BRU-REEL7 Related Products

	AD7708BRU-REEL7	AD7718BR-REEL7	AD7708BRZ	AD7718BRZ	AD7718BR	AD7718BRU	AD7708BRU
Description	10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, TSSOP-28	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, SOIC-28	10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, SOIC-28	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, ROHS COMPLIANT, PLASTIC, SOIC-28	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, SOIC-28	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, TSSOP-28	10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, PLASTIC, TSSOP-28
Is it lead-free?	Contains lead	Contains lead	Lead free	Lead free	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible	conform to	conform to	incompatible	incompatible	incompatible
Parts packaging code	SSOP	SOIC	SOIC	SOIC	SOIC	SSOP	SSOP
package instruction	TSSOP,	SOP,	SOP,	SOP,	SOP,	TSSOP,	TSSOP,
Contacts	28	28	28	28	28	28	28
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown
Maximum analog input voltage	2.56 V	2.56 V	2.56 V	2.56 V	2.56 V	2.56 V	2.56 V
Minimum analog input voltage	-2.56 V	-2.56 V	-2.56 V	-2.56 V	-2.56 V	-2.56 V	-2.56 V
Converter type	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA	ADC, DELTA-SIGMA
JESD-30 code	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28
JESD-609 code	e0	e0	e3	e3	e0	e0	e0
length	9.7 mm	17.9 mm	17.9 mm	17.9 mm	17.9 mm	9.7 mm	9.7 mm
Maximum linear error (EL)	0.0015%	0.001%	0.0015%	0.001%	0.001%	0.001%	0.0015%
Humidity sensitivity level	1	1	1	1	1	1	1
Number of analog input channels	10	10	10	10	10	10	10
Number of digits	16	24	16	24	24	24	16
Number of functions	1	1	1	1	1	1	1
Number of terminals	28	28	28	28	28	28	28
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Output bit code	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY	BINARY, OFFSET BINARY
Output format	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TSSOP	SOP	SOP	SOP	SOP	TSSOP	TSSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240	240	260	260	240	240	240
Maximum seat height	1.2 mm	2.65 mm	2.65 mm	2.65 mm	2.65 mm	1.2 mm	1.2 mm
Nominal supply voltage	3 V	3 V	3 V	3 V	3 V	3 V	3 V
surface mount	YES	YES	YES	YES	YES	YES	YES
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	TIN LEAD	TIN LEAD	MATTE TIN	MATTE TIN	TIN LEAD	TIN LEAD	TIN LEAD
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.65 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	30	40	40	30	30	30
width	4.4 mm	7.5 mm	7.5 mm	7.5 mm	7.5 mm	4.4 mm	4.4 mm
Maker	Rochester Electronics	-	Rochester Electronics	Rochester Electronics	Rochester Electronics	Rochester Electronics	Rochester Electronics

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