2.7 V to 5.5 V, <100 µA, 8-/10-/12-Bit
nanoDAC™ D/A, SPI
®
Interface, SC70 Package
Preliminary Technical Data
AD5601/AD5611/AD5621


Rev. PrC
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FEATURES
6-lead SC70 package
Power-down to <100 nA @ 3 V
Micropower operation: max 100 µA @ 5 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to 0 V with brownout detection
3 power-down functions
Low power serial interface with Schmitt-triggered inputs
On-chip output buffer amplifier, rail-to-rail operation
SYNC interrupt facility
Minimized zero code error
AD5601 buffered 8-bit DAC in SC70:
B Version: ±0.5 LSB INL
AD5611 buffered 10-bit DAC in SC70:
B Version: ±0.5 LSB INL
A Version: ±4 LSB INL
AD5621 buffered 12-bit DAC in SC70:
B Version: ±1 LSB INL
A Version: ±6 LSB INL

APPLICATIONS
Voltage level setting
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators

FUNCTIONAL BLOCK DIAGRAM
POWER-ON
RESET
DAC
REGISTER
14-BIT
DAC
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
AD5601/AD5611/AD5621
V
DD GND
REF(+)
RESISTOR
NETWORK
V
OUT
SYNC
SCLK DIN
OUTPUT
BUFFER
04783-4-001

Figure 1.
Table 1. Related Devices
Part Number Description
AD5641 2.7 V to 5.5 V, <100 µA, 14-Bit, nanoDAC D/A, tiny
SC70 Package
GENERAL DESCRIPTION
The AD5601/AD5611/AD5621, members of the nanoDAC
family, are single, 8-/10-/12-bit, buffered, voltage out DACs that
operate from a single 2.7 V to 5.5 V supply, consuming <100 µA
at 5 V. The parts come in a tiny SC70 package. 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.
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 <100 nA at 3 V, and
provides 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 equipment. 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.
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