AD7705BRZ Analog Devices Inc, AD7705BRZ Datasheet - Page 2

• Manufacturer Part Number: AD7705BRZ
• Description: IC ADC 16BIT 2CH 16-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD7705BRZ

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 16
• Sampling Rate (per Second): 500
• Number Of Converters: 1
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Resolution (bits): 16bit
• Input Channel Type: Differential
• Supply Current: 1.3mA
• Digital Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7705EBZ - BOARD EVALUATION FOR AD7705
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD7705/AD7706
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Product Highlights ........................................................................... 4
Specifications..................................................................................... 5
Absolute Maximum Ratings............................................................ 9
Pin Configurations and Function Descriptions ......................... 10
Output Noise (5 V Operation)...................................................... 12
Output Noise (3 V Operation)...................................................... 13
Typical Performance Characteristics ........................................... 14
On-Chip Registers .......................................................................... 16
Circuit Description......................................................................... 21
Timing Characteristics ................................................................ 8
ESD Caution.................................................................................. 9
Communication Register (RS2, RS1, RS0 = 0, 0, 0)............... 16
Setup Register (RS2, RS1, RS0 = 0, 0, 1); Power-On/Reset
Status: 01 Hexadecimal .............................................................. 17
Clock Register (RS2, RS1, RS0 = 0, 1, 0); Power-On/Reset
Status: 05 Hexadecimal .............................................................. 19
Data Register (RS2, RS1, RS0 = 0, 1, 1) ................................... 20
Test Register (RS2, RS1, RS0 = 1, 0, 0); Power-On/Reset
Status: 00 Hexadecimal .............................................................. 20
Zero-Scale Calibration Register (RS2, RS1, RS0 = 1, 1, 0);
Power-On/Reset Status: 1F4000 Hexadecimal ........................... 20
Full-Scale Calibration Register (RS2, RS1, RS0 = 1, 1, 1);
Power-On/Reset Status: 5761AB HexaDecimal......................... 20
Analog Input ............................................................................... 22
Bipolar/Unipolar Input .............................................................. 22
Rev. C | Page 2 of 44
Theory of Operation ...................................................................... 28
Applications..................................................................................... 38
Outline Dimensions ....................................................................... 42
Reference Input........................................................................... 23
Digital Filtering........................................................................... 23
Analog Filtering.......................................................................... 25
Calibration................................................................................... 25
Clocking and Oscillator Circuit ............................................... 28
System Synchronization ............................................................ 28
RESET Input ............................................................................... 29
Standby Mode ............................................................................. 29
Accuracy ...................................................................................... 29
Drift Considerations .................................................................. 29
Power Supplies ............................................................................ 30
Supply Current............................................................................ 30
Grounding and Layout .............................................................. 30
Evaluating the Performance...................................................... 31
Digital Interface.......................................................................... 31
Configuring the AD7705/AD7706 .......................................... 33
Microcomputer/Microprocessor Interfacing ......................... 34
Code For Setting Up the AD7705/AD7706............................ 35
Pressure Measurement............................................................... 38
Temperature Measurement ....................................................... 39
Smart Transmitters..................................................................... 40
Battery Monitoring .................................................................... 41
Ordering Guide .......................................................................... 43