16 Input, 16 Output Analog I/O Port with Integrated Amplifiers AD5590 FEATURES Low input bias current: 1 pA maximum Single supply operation Input channels Low noise: 22 nV/Hz 12-bit successive approximation ADC Unity gain stable 16 inputs with sequencer Flexible serial interface Fast throughput rate: 1 MSPS SPI-/QSPI-/MICROWIRE-/DSP-compatible Wide input bandwidth: 70 dB SNR at f = 50 kHz IN 40C to +85C operation Output channels Available in 80-ball CSP BGA package 16 outputs with 12-bit DACs On-chip 2.5 V reference APPLICATIONS Hardware LDAC and LDAC override function Optical line cards CLR function to programmable code Base stations Rail-to-rail operation General-purpose analog I/O Operational amplifiers Monitoring and control Offset voltage: 2.2 mV maximum FUNCTIONAL BLOCK DIAGRAM ADCV DACV (2) V1+ V2+ V1 V2 V /V REFIN1 REFOUT1 DD DD POWER-ON POWER-DOWN RESET LOGIC LDAC 2.5V REF BUFFER INPUT DAC STRING VOUT0 DSCLK REGISTER REGISTER DAC 0 DSYNC1 BUFFER DSYNC2 INPUT DAC STRING VOUT7 REGISTER REGISTER DAC 7 DDIN DAC LDAC INTERFACE LOGIC BUFFER CLR INPUT DAC STRING VOUT8 REGISTER REGISTER DAC 8 BUFFER DAC INPUT STRING VOUT15 REGISTER REGISTER DAC 15 POWER-DOWN LOGIC V 2.5V REF V /V DRIVE REFIN2 REFOUT2 VIN0 ASCLK SEQUENCER ADC ASYNC INTERFACE 12-BIT LOGIC INPUT SUCCESSIVE ADIN T/H MUX APPROXIMATION ADOUT ADC VIN15 AD5590 V REFA IN0() IN7() IN7(+) OUT7 IN0(+) OUT0 DACGND (2) ADCGND Figure 1. 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All rights reserved. 07691-001AD5590 TABLE OF CONTENTS Features .............................................................................................. 1 DAC .............................................................................................. 14 Applications ....................................................................................... 1 ADC ............................................................................................. 18 Functional Block Diagram .............................................................. 1 Amplifier ..................................................................................... 19 Revision History ............................................................................... 2 Terminology .................................................................................... 23 General Description ......................................................................... 3 Theory of Operation ...................................................................... 26 Specifications ..................................................................................... 4 DAC Section................................................................................ 26 ADC Specifications ...................................................................... 4 ADC Section ............................................................................... 27 DAC Specifications....................................................................... 6 ADC Converter Operation ....................................................... 27 Operational Amplifier Specifications ........................................ 8 Amplifier Section ....................................................................... 29 Timing Specifications .................................................................. 9 Serial Interface ................................................................................ 30 Absolute Maximum Ratings .......................................................... 11 Accessing the DAC Block .......................................................... 30 Thermal Resistance .................................................................... 11 Accessing the ADC Block ......................................................... 34 ESD Caution ................................................................................ 11 Outline Dimensions ....................................................................... 42 Pin Configuration and Function Descriptions ........................... 12 Ordering Guide .......................................................................... 42 Typical Performance Characteristics ........................................... 14 REVISION HISTORY 7/11Rev. 0 to Rev. A Changes to Features Section and Figure 1..................................... 1 Changes to VOUT10 Pin Number in Table 10 ........................... 13 10/08Revision 0: Initial Version Rev. A Page 2 of 44