AD5590 Datasheet, PDF (1/44 Pages) Analog Devices – 16 Input, 16 Output Analog I/O Port with Integrated Amplifiers

FEATURES
Input channels
12-bit successive approximation ADC
16 inputs with sequencer
Fast throughput rate: 1 MSPS
Wide input bandwidth: 70 dB SNR at fIN = 50 kHz
Output channels
16 outputs with 12-bit DACs
On-chip 2.5 V reference
Hardware LDAC and LDAC override function
CLR function to programmable code
Rail-to-rail operation
Operational amplifiers
16 Input, 16 Output Analog I/O Port
with Integrated Amplifiers
AD5590
Offset voltage: 2.2 mV maximum
Low input bias current: 1 pA maximum
Single supply operation
Low noise: 22 nV/√Hz
Unity gain stable
Flexible serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible
−40°C to +85°C operation
APPLICATIONS
Optical line cards
Base stations
General-purpose analog I/O
Monitoring and control
FUNCTIONAL BLOCK DIAGRAM
ADCVDD DACVDD (×2)
V1+ V2+ V1– V2– VREFIN1/VREFOUT1
DSCLK
DSYNC1
DSYNC2
DDIN
LDAC
CLR
POWER-ON
RESET
DAC
INTERFACE
LOGIC
LDAC
INPUT
REGISTER
DAC
REGISTER
POWER-DOWN
1.25V/2.5V
LOGIC
REF
STRING
DAC 0
BUFFER
VOUT0
INPUT
REGISTER
DAC
REGISTER
STRING
DAC 7
BUFFER
VOUT7
INPUT
REGISTER
DAC
REGISTER
STRING
DAC 8
BUFFER
VOUT8
VDRIVE
ASCLK
ASYNC
ADIN
ADOUT
INPUT
REGISTER
DAC
REGISTER
STRING
DAC 15
ADC
INTERFACE
LOGIC
1.25V/2.5V
REF
SEQUENCER
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
IN0(–) IN0(+)
OUT0 IN7(–) IN7(+)
OUT7 DACGND (×2)
Figure 1.
BUFFER
VOUT15
POWER-DOWN
LOGIC
VREFIN2/VREFOUT2
VIN0
T/H
INPUT
MUX
AD5590
ADCGND
VINI5
VREFA
Rev. 0
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