Document
Data Sheet
Fully Accurate, 12-/14-/16-Bit VOUT nanoDAC, Quad, SPI Interface, 4.5 V to 5.5 V in TSSOP
AD5024/AD5044/AD5064
FEATURES
Low power quad 12-/14-/16-bit DAC, ±1 LSB INL Pin compatible and performance upgrade to AD5666 Individual and common voltage reference pin options Rail-to-rail operation 4.5 V to 5.5 V power supply Power-on reset to zero scale or midscale 3 power-down functions and per-channel power-down Hardware LDAC with software LDAC override function CLR function to programmable code SDO daisy-chaining option 14-/16-lead TSSOP Internal reference buffer and internal output amplifier
APPLICATIONS
Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators
GENERAL DESCRIPTION
The AD5024/AD5044/AD5064/AD5064-1 are low power, quad 12-/14-/16-bit buffered voltage output nanoDAC® converters that offer relative accuracy specifications of 1 LSB INL and 1 LSB DNL with the AD5024/AD5044/AD5064 individual reference pin and the AD5064-1 common reference pin options. The AD5024/AD5044/AD5064/AD5064-1 can operate from a single 4.5 V to 5.5 V supply. The AD5024/AD5044/AD5064/AD5064-1 also offer a differential accuracy specification of ±1 LSB. The devices use a versatile 3-wire, low power Schmitt trigger serial interface that operates at clock rates up to 50 MHz and is compatible with standard SPI, QSPI™, MICROWIRE, and DSP interface standards. Integrated reference buffers and output amplifiers are also provided on-chip. The AD5024/AD5044/AD5064/AD5064-1 incorporate a power-on reset circuit that ensures the DAC output powers up to zero scale or midscale and remains there until a valid write takes place to the device. The AD5024/AD5044/ AD5064/AD5064-1 contain a power-down feature that reduces the current consumption of the device to typically 400 nA at 5 V and provides software selectable output loads while in powerdown mode. Total unadjusted error for the devices is <2 mV.
FUNCTIONAL BLOCK DIAGRAMS
VDD
VREFIN
AD5064-1
SCLK SYNC
DIN SDO
LDAC INTERFACE LOGIC AND
SHIFT REGISTER
INPUT REGISTER
INPUT REGISTER
INPUT REGISTER
INPUT REGISTER POWER-ON
RESET
DAC REGISTER
DAC REGISTER
DAC REGISTER
DAC REGISTER
DAC A DAC B DAC C DAC D
BUFFER
VOUTA
BUFFER
VOUTB
BUFFER
VOUTC
BUFFER
VOUTD
POWER-DOWN LOGIC
06803-064
LDAC CLR
POR
GND
Figure 1. AD5064-1 Functional Equivalent and Pin Compatible with AD5666
AD5024/ AD5044/ AD5064 LDAC
SCLK SYNC
DIN
INTERFACE LOGIC AND
SHIFT REGISTER
VDD
VREFA VREFB
INPUT REGISTER
INPUT REGISTER
INPUT REGISTER
INPUT REGISTER POWER-ON
RESET
DAC REGISTER
DAC REGISTER
DAC REGISTER
DAC REGISTER
DAC A DAC B DAC C DAC D
BUFFER BUFFER BUFFER BUFFER
POWER-DOWN LOGIC
VOUTA VOUTB VOUTC VOUTD
LDAC CLR
POR
VREFC VREFD
GND
Figure 2. AD5024/AD5044/AD5064 with Individual Reference Pins
PRODUCT HIGHLIGHTS
06803-001
1. Quad channel available in 14-/16-lead TSSOPs. 2. 16-bit accurate, 1 LSB INL. 3. High speed serial interface with clock speeds up to 50 MHz. 4. Reset to known output voltage (zero scale or midscale).
Table 1. Related Devices Device No. AD5666
AD5025/AD5045/AD5065
AD5062, AD5063
AD5061 AD5040/AD5060
Description
Quad,16-bit buffered DAC, 16 LSB INL, TSSOP
Dual, 16-bit buffered DACs, 1 LSB INL, TSSOP
16-bit nanoDAC, 1 LSB INL, SOT-23, MSOP
16-bit nanoDAC, 4 LSB INL, SOT-23
14-/16-bit nanoDAC, 1 LSB INL, SOT-23
Rev. G
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AD5024/AD5044/AD5064
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagrams............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3
AC Characteristics........................................................................ 4 Timing Characteris.