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AD5620 Datasheet

(AD56x0) 12-/14-/16-Bit nanoDAC

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Data Sheet
Single, 12-/14-/16-Bit nanoDAC with
5 ppm/°C On-Chip Reference in SOT-23
AD5620/AD5640/AD5660
FEATURES
Low power, single nanoDACs
AD5660: 16 bits
AD5640: 14 bits
AD5620: 12 bits
12-bit accuracy guaranteed
On-chip, 1.25 V/2.5 V, 5 ppm/°C reference
Tiny 8-lead SOT-23, MSOP, and LFCSP packages
Power-down to 480 nA @ 5 V, 200 nA @ 3 V
3 V/5 V single power supply
Guaranteed 16-bit monotonic by design
Power-on reset to zero/midscale
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
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
PRODUCT HIGHLIGHTS
1. 12-/14-/16-bit nanoDAC—12-bit accuracy guaranteed.
2. On-chip, 1.25 V/2.5 V, 5 ppm/°C reference.
3. Available in 8-lead SOT-23, MSOP, and LFCSP packages.
4. Power-on reset to 0 V or midscale.
5. 10 µs settling time.
Table 1. Related Device
Part No.
Description
AD5662
2.7 V to 5.5 V, 16-bit DAC in SOT-23, LFCSP, and
MSOP, external reference
FUNCTIONAL BLOCK DIAGRAM
VREFOUT GND
VDD
POWER-ON
RESET
1.25/2.5V
REF
AD5620/AD5640/AD5660
VFB
DAC
REGISTER
REF(+)
16-BIT
DAC
OUTPUT
BUFFER
VOUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
SYNC SCLK DIN
Figure 1.
GENERAL DESCRIPTION
The AD5620/AD5640/AD5660, members of the nanoDAC™
family of devices, are low power, single, 12-/14-/16-bit, buffered
voltage-out DACs and are guaranteed monotonic by design.
The AD5620/AD5640/AD5660-1 parts include an internal,
1.25 V, 5 ppm/°C reference, giving a full-scale output voltage
range of 2.5 V. The AD5620/AD5640/AD5660-2-3 parts include
an internal, 2.5 V, 5 ppm/°C reference, giving a full-scale output
voltage range of 5 V. The reference associated with each part is
available at the VREFOUT pin.
The parts incorporate a power-on reset circuit to ensure that the
DAC output powers up to 0 V (AD5620/AD5640/AD5660-1-2)
or midscale (AD5620-3 and AD5660-3) and remains there until
a valid write takes place. The parts contain a power-down
feature that reduces the current consumption of the device to
480 nA at 5 V and provides software-selectable output loads
while in power-down mode. The power consumption is
2.5 mW at 5 V, reducing to 1 µW in power-down mode.
The AD5620/AD5640/AD5660 on-chip precision output
amplifier allows rail-to-rail output swing to be achieved. For
remote sensing applications, the output amplifier’s inverting
input is available to the user. The AD5620/AD5640/AD5660 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.
Rev. G
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