2.7 V to 5.5 V, <100 μA, 8-/10-/12-Bit
nanoDAC, SPI Interface in LFCSP and SC70
Data Sheet
AD5601/AD5611/AD5621
FEATURES
6-lead SC70 and LFCSP packages
FUNCTIONAL BLOCK DIAGRAM
V
DD
GND
Micropower operation: 100 µA maximum at 5 V
Power-down typically to 0.2 µA at 3 V
2.7 V to 5.5 V power supply
POWER-ON
RESET
AD5601/AD5611/AD5621
Guaranteed monotonic by design
Power-on reset to 0 V with brownout detection
3 power-down functions
REF(+)
DAC
REGISTER
OUTPUT
BUFFER
V
12-/10-/8-BIT
DAC
OUT
Low power serial interface with Schmitt-triggered inputs
On-chip output buffer amplifier, rail-to-rail operation
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
interrupt facility
SYNC
Minimized zero-code error
AD5601 buffered 8-bit DAC
B version: 0.5 LSB INL
AD5611 buffered 10-bit DAC
B version: 0.5 LSB INL
A version: 4 LSB INL
AD5621 buffered 12-bit DAC
B version: 1 LSB INL
A version: 6 LSB INL
SYNC SCLK SDIN
Figure 1.
Table 1. Related Devices
Part Number Description
AD5641
2.7 V to 5.5 V, <100 µA, 14-bit nanoDAC in
SC70 and LFCSP packages
APPLICATIONS
Voltage level setting
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
They also provide software-selectable output loads while in
power-down mode. The parts are put into power-down mode
over the serial interface.
The low power consumption of these parts in normal operation
makes them ideally suited to portable battery-operated equip-
ment. The combination of small package and low power makes
these nanoDAC devices ideal for level-setting requirements,
such as generating bias or control voltages in space-constrained
and power-sensitive applications.
GENERAL DESCRIPTION
The AD5601/AD5611/AD5621, members of the nanoDAC®
family, are single, 8-/10-/12-bit, buffered voltage output DACs
that operate from a single 2.7 V to 5.5 V supply, consuming
typically 75 µA at 5 V. The parts come in tiny LFCSP and SC70
packages. Their on-chip precision output amplifier allows rail-
to-rail output swing to be achieved. The AD5601/AD5611/
AD5621 utilize a versatile 3-wire serial interface that operates at
clock rates up to 30 MHz and is compatible with SPI, QSPI™,
MICROWIRE™, and DSP interface standards.
PRODUCT HIGHLIGHTS
1. Available in 6-lead LFCSP and SC70 packages.
2. Low power, single-supply operation. The AD5601/
AD5611/AD5621 operate from a single 2.7 V to 5.5 V
supply with a maximum current consumption of 100 µA,
making them ideal for battery-powered applications.
3. The on-chip output buffer amplifier allows the output of
the DAC to swing rail-to-rail with a typical slew rate of
0.5 V/µs.
4. Reference is derived from the power supply.
5. High speed serial interface with clock speeds up to
30 MHz. Designed for very low power consumption.
The interface powers up only during a write cycle.
6. Power-down capability. When powered down, the DAC
typically consumes 0.2 µA at 3 V. Power-on reset with
brownout detection.
The reference for the AD5601/AD5611/AD5621 is derived
from the power supply inputs and, therefore, gives the widest
dynamic output range. The parts incorporate a power-on reset
circuit, which ensures that the DAC output powers up to 0 V
and remains there until a valid write to the device takes place.
The AD5601/AD5611/AD5621 contain a power-down feature
that reduces current consumption to typically 0.2 µA at 3 V.
Rev. G
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Tel: 781.329.4700 ©2005–2013 Analog Devices, Inc. All rights reserved.
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