May 1997
ML2340*, ML2350**
Single Supply, Programmable
8-Bit D/A Converters
GENERAL DESCRIPTION
FEATURES
The ML2340 and ML2350 are CMOS voltage output, 8-bit
D/A converters with an internal voltage reference and a µP
interface. These devices are designed to be powered by a
single supply, although they can be powered from dual
power supplies. The output voltage swings above zero
■ Programmable output voltage gain settings of 2, 1,
1
/2
, 1/
provide 8-, 9-, 10-, or 11-bit effective resolution
4
around zero
■ AGND to V output voltage swing
CC
■ Bipolar or unipolar output voltage
scale (V ) in the unipolar mode or around zero scale
ZS
(V ) in the bipolar mode, both with programmable gain.
■ 4.5V to 13.2V single supply or ±2.25V to ±6.5V
ZS
V
V
can be set to any voltage from AGND to 2.25V below
. The digital and analog grounds, DGND and AGND,
dual-supply operation
ZS
CC
■ Transparent latch allows microprocessor interface
are totally independent of each other. DGND can be set to
with 30ns setup time
any voltage from AGND to 4.5V below V for easy
CC
■ Data flow-through mode
interfacing to standard TTL and CMOS logic families.
■ Voltage reference output
The high level of integration and versatility of the ML2340
and ML2350 makes them ideal for a wide range of
applications in hard disk drives, automotive, telecom, and
a variety of general purpose industrial uses. One specific
intended application is controlling a hard disk voice coil.
ML2340 ........................................... 2.25V or 4.50V
ML2350 ........................................... 2.50V or 5.00V
■ Nonlinearity....................................±1/
4
LSB or ±1/
LSB
2
■ Output voltage settling time over temperature and
supply voltage tolerance
The internal reference of the ML2340 provides a 2.25V or
4.50V output for use with A/D converters that use a single
5V ±10% power supply, while the ML2350 provide a
2.50V or 5.00V reference output.
Within 1V of V and AGND ................... 2.5µs max
CC
Within 100mV of V and AGND ............... 5µs max
CC
■ TTL and CMOS compatible digital inputs
■ Low supply current (5V supply) ..................... 5mA max
■ 18-pin DIP or surface mount SOlC
BLOCK DIAGRAM
V
V
AGND
ZS
CC
V
V
REF
REFOUT
V
REFIN
–
OP
AMP
8-BIT D/A
V
OUT
+
DGND
RESISTORS
SWITCHES
DECODERS
DATA LATCH
DB0
(LSB)
DB7
(MSB)
GAIN 0 GAIN 1
XFER
* This Part Is Obsolete
** This Part Is End Of Life As Of August 1, 2000
1