Fully Accurate 14-/16-Bit V
OUT
nanoDAC
™
SPI Interface 2.7 V to 5.5 V, in an SOT-23
AD5040/AD5060
Rev. A
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FEATURES
Single 14-/16-bit DAC, 1 LSB INL
Power-on reset to midscale or zero scale
Guaranteed monotonic by design
3 power-down functions
Low power serial interface with Schmitt-triggered inputs
Small 8-lead SOT-23 package, low power
Fast settling time of 4 μs typically
2.7 V to 5.5 V power supply
Low glitch on power-up
SYNC
interrupt facility
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 AD5040 and the AD5060, members of the ADI nanoDAC
family, are low power, single 14-/16-bit buffered voltage-out
DACs that operate from a single 2.7 V to 5.5 V supply. The
AD5040/AD5060 parts offer a relative accuracy specification
of ±1 LSB and operation are guaranteed monotonic with a
±1 LSB DNL specification. The parts use a versatile 3-wire serial
interface that operates at clock rates up to 30 MHz and is
compatible with standard SPI®, QSPI™, MICROWIRE™, and
DSP interface standards. The reference for both the AD5040
and AD5060 is supplied from an external V
REF
pin. A reference
buffer is also provided on-chip. The AD5060 incorporates a
power-on reset circuit that ensures the DAC output powers up
to midscale or zero scale and remains there until a valid write
takes place to the device. The AD5040 and the AD5060 both
contain a power-down feature that reduces the current con-
sumption of the device to typically 330 nA at 5 V and provides
software-selectable output loads while in power-down mode.
The parts are put into power-down mode over the serial
interface. Total unadjusted error for the parts is <2 mV.
Both parts exhibit very low glitch on power-up.
FUNCTIONAL BLOCK DIAGRAM
AD5040/
AD5060
V
DD
V
OUT
V
REF
POWER-ON
RESET
DAC
REGISTER
DAC
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
REF(+)
SCLK DIN
04767-001
SYNC DACGND
BUF
AGND
OUTPUT
BUFFER
Figure 1.
PRODUCT HIGHLIGHTS
1. Available in a small, 8-lead SOT-23 package.
2. 14-/16-bit accurate, 1 LSB INL.
3. Low glitch on power-up.
4. High speed serial interface with clock speeds up to 30 MHz.
5. Three power-down modes available to the user.
6. Reset to known output voltage (midscale, zero scale).
Table 1. Related Devices
Part No. Description
AD5061 2.7 V to 5.5 V, 16-bit nanoDAC D/A, 4 LSB INL, SOT-23
AD5062 2.7 V to 5.5 V, 16-bit nanoDAC D/A,1 LSB INL, SOT-23
AD5063 2.7 V to 5.5 V, 16-bit nanoDAC D/A, 1 LSB INL, MSOP
