2.5 V to 5.5 V, 250 µA, 2-Wire Interface
Dual-Voltage Output, 8-/10-/12-Bit DACs

AD5337/AD5338/AD5339


Rev. A
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FEATURES
AD5337
2 buffered 8-bit DACs in 8-lead MSOP
AD5338, AD5338-1
2 buffered 10-bit DACs in 8-lead MSOP
AD5339
2 buffered 12-bit DACs in 8-lead MSOP
Low power operation: 250 mA @ 3 V, 300 mA @ 5 V
2-wire (I
2
C®compatible) serial interface
2.5 V to 5.5 V power supply
Guaranteed monotonic by design over all codes
Power-down to 80 nA @ 3 V, 200 nA @ 5 V
3 power-down modes
Double-buffered input logic
Output range: 0 V to VREF
Power-on reset to 0 V
Simultaneous update of outputs (LDAC function)
Software clear facility
Data readback facility
On-chip rail-to-rail output buffer amplifiers
Temperature range −40°C to +105°C
APPLICATIONS
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
Industrial process control

GENERAL DESCRIPTION
AD5337/AD5338/AD5339 are dual 8-, 10-, and 12-bit buffered
voltage output DACs in an 8-lead MSOP package, which
operate from a single 2.5 V to 5.5 V supply, consuming 250 µA
at 3 V. On-chip output amplifiers allow rail-to-rail output swing
with a slew rate of 0.7 V/µs. A 2-wire serial interface operates at
clock rates up to 400 kHz. This interface is SMBus-compatible
at VDD < 3.6 V. Multiple devices can be placed on the same bus.
The references for the two DACs are derived from one reference
pin. The outputs of all DACs may be updated simultaneously
using the software LDAC function. The parts incorporate a
power-on reset circuit that ensures that the DAC outputs power
up to 0 V and remain there until a valid write to the device
takes place. A software clear function resets all input and DAC
registers to 0 V. A power-down feature reduces the current
consumption of the devices to 200 nA @ 5 V (80 nA @ 3 V).
The low power consumption of these parts in normal operation
makes them ideally suited to portable battery-operated
equipment. The power consumption is typically 1.5 mW at 5 V
and 0.75 mW at 3 V, reducing to 1 µW in power-down mode.





FUNCTIONAL BLOCK DIAGRAM
SCL
INTERFACE
LOGIC
INPUT
REGISTER
V
OUT
ABUFFER
DAC
REGISTER
STRING
DAC A
V
DD REFIN
INPUT
REGISTER
V
OUT
BBUFFER
DAC
REGISTER
POWER-ON
RESET
POWER-DOWN
LOGIC
LDAC
STRING
DAC B
A0
SDA
GND
AD5337/AD5338/AD5339
03756-A
-
001

Figure 1.