AD7719BRUZ Analog Devices Inc, AD7719BRUZ Datasheet - Page 2
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AD7719BRUZ
Manufacturer Part Number
AD7719BRUZ
Description
Dual 16-Bit & 24-Bit SD ADC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7719BRUZ-REEL.pdf
(40 pages)
Specifications of AD7719BRUZ
Number Of Bits
16/24
Sampling Rate (per Second)
105
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
2
Power Dissipation (max)
4.5mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP (0.173", 4.40mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7719EB - BOARD EVAL FOR AD7719
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
AD7719
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . 6
ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
TIMING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . 7
DIGITAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . 9
TYPICAL PERFORMANCE CHARACTERISTICS . . . . 11
DUAL-CHANNEL ADC CIRCUIT INFORMATION . . . 12
MAIN AND AUXILIARY ADC NOISE
ON-CHIP REGISTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Main Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Auxiliary Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Both Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Communications Register
Status Register (A3, A2, A1, A0 = 0, 0, 0, 0;
Mode Register (A3, A2, A1, A0 = 0, 0, 0, 1;
Operating Characteristics when Addressing the
Main ADC Control Register (AD0CON):
Aux ADC Control Registers (AD1CON):
Filter Register (A3, A2, A1, A0 = 0, 1, 0, 0;
I/O and Current Source Control Register (IOCON):
Main ADC Data Result Registers (DATA0):
Aux ADC Data Result Registers (DATA1):
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
(A3, A2, A1, A0 = 0, 0, 0, 0) . . . . . . . . . . . . . . . . . . . . 19
Power-On Reset = 0x00) . . . . . . . . . . . . . . . . . . . . . . . 20
Power-On Reset = 0x00) . . . . . . . . . . . . . . . . . . . . . . . 21
Mode and Control Registers . . . . . . . . . . . . . . . . . . . . . 22
(A3, A2, A1, A0 = 0, 0, 1, 0;
Power-On Reset = 0x07) . . . . . . . . . . . . . . . . . . . . . . . 22
(A3, A2, A1, A0 = 0, 0, 1, 1;
Power-On Reset = 0x01) . . . . . . . . . . . . . . . . . . . . . . . 23
Power-On Reset = 0x45) . . . . . . . . . . . . . . . . . . . . . . . 24
(A3, A2, A1, A0 = 0, 1, 1, 1;
Power-On Reset = 0x0000) . . . . . . . . . . . . . . . . . . . . . 24
(A3, A2, A1, A0 = 0, 1, 0, 1;
Power-On Reset = 0x00 0000) . . . . . . . . . . . . . . . . . . . 26
(A3, A2, A1, A0 = 0, 1, 1, 0;
Power-On Reset = 0x0000) . . . . . . . . . . . . . . . . . . . . . 26
TABLE OF CONTENTS
–2–
CONFIGURING THE AD7719 . . . . . . . . . . . . . . . . . . . . . 27
MICROCOMPUTER/MICROPROCESSOR
CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 30
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . 39
REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Main ADC Offset Calibration Coefficient Registers (OF0):
Aux ADC Offset Calibration Coefficient Registers (OF1):
Main ADC Gain Calibration Coefficient Registers (GNO):
Aux ADC Gain Calibration Coefficient Registers (GN1):
ID Register (ID): (A3, A2, A1, A0 = 1, 1, 1, 1;
User Nonprogrammable Test Registers . . . . . . . . . . . . . . 26
INTERFACING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
AD7719-to-68HC11 Interface . . . . . . . . . . . . . . . . . . . . . 29
AD7719-to-8051 Interface . . . . . . . . . . . . . . . . . . . . . . . . 29
AD7719-to-ADSP-2103/ADSP-2105 Interface . . . . . . . . 30
Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Programmable Gain Amplifier . . . . . . . . . . . . . . . . . . . . . 32
Bipolar/Unipolar Configuration . . . . . . . . . . . . . . . . . . . . 32
Data Output Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Burnout Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Excitation Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Reference Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reset Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power-Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
ADC Disable Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Grounding and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Pressure Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . 36
3-Wire RTD Configurations . . . . . . . . . . . . . . . . . . . . . . 37
Smart Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
(A3, A2, A1, A0 = 1, 0, 1, 0;
(A3, A2, A1, A0 = 1, 0, 0, 0;
Power-On Reset = 0x80 0000) . . . . . . . . . . . . . . . . . . . 26
(A3, A2, A1, A0 = 1, 0, 0, 1;
Power-On Reset = 0x8000) . . . . . . . . . . . . . . . . . . . . . 26
Power-On Reset = 0x5X XXX5) . . . . . . . . . . . . . . . . . 26
(A3, A2, A1, A0 = 1, 0, 1, 1;
Power-On Reset = 0x59XX) . . . . . . . . . . . . . . . . . . . . . 26
Power-On Reset = 0x0X) . . . . . . . . . . . . . . . . . . . . . . . 26
REV. A