1
May 1997
ML2340
*
, ML2350
**
Single Supply, Programmable
8-Bit D/A Converters
GENERAL DESCRIPTION
The ML2340 and ML2350 are CMOS voltage output, 8-bit
D/A converters with an internal voltage reference and a P
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
scale (V
ZS
) in the unipolar mode or around zero scale
(V
ZS
) in the bipolar mode, both with programmable gain.
V
ZS
can be set to any voltage from AGND to 2.25V below
V
CC
. The digital and analog grounds, DGND and AGND,
are totally independent of each other. DGND can be set to
any voltage from AGND to 4.5V below V
CC
for easy
interfacing to standard TTL and CMOS logic families.
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.
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.
FEATURES
s
Programmable output voltage gain settings of 2, 1,
1
/
2
,
1
/
4
provide 8-, 9-, 10-, or 11-bit effective resolution
around zero
s
AGND to V
CC
output voltage swing
s
Bipolar or unipolar output voltage
s
4.5V to 13.2V single supply or 2.25V to 6.5V
dual-supply operation
s
Transparent latch allows microprocessor interface
with 30ns setup time
s
Data flow-through mode
s
Voltage reference output
ML2340 ........................................... 2.25V or 4.50V
ML2350 ........................................... 2.50V or 5.00V
s
Nonlinearity ....................................
1
/
4
LSB or
1
/
2
LSB
s
Output voltage settling time over temperature and
supply voltage tolerance
Within 1V of V
CC
and AGND ................... 2.5s max
Within 100mV of V
CC
and AGND ............... 5s max
s
TTL and CMOS compatible digital inputs
s
Low supply current (5V supply) ..................... 5mA max
s
18-pin DIP or surface mount SOlC
BLOCK DIAGRAM
OP
AMP
RESISTORS
SWITCHES
DECODERS
8-BIT D/A
DATA LATCH
V
REF
V
REFOUT
V
REFIN
DGND
V
ZS
V
CC
AGND
+
V
OUT
DB0
(LSB)
DB7
(MSB)
XFER
GAIN 0
GAIN 1
* This Part Is Obsolete
** This Part Is End Of Life As Of August 1, 2000
ML2340, ML2350
2
PIN NAME
FUNCTION
PIN NAME
FUNCTION
1
V
CC
Positive supply.
2
V
OUT
Voltage output of the D/A converter.
V
OUT
is referenced to V
ZS
.
3
V
ZS
Zero Scale Voltage. V
OUT
is referenced
to V
ZS
. V
ZS
is normally tied to AGND
in the unipolar mode or to mid-supply
in the bipolar mode. When the device
is operated from a single power
supply, V
ZS
has a maximum current
requirement of 300A in the bipolar
mode.
4
AGND
Analog ground.
5
DGND
Digital ground. This is the ground
reference level for all digital inputs.
The range is AGND - DGND - V
CC
4.5V. DGND is normally tied to
system ground.
6
DB0
Data input -- Bit 0 (LSB).
7
DB1
Data input -- Bit 1.
PIN DESCRIPTION
8
DB2
Data input -- Bit 2.
9
DB3
Data input -- Bit 3.
10 DB4
Data input -- Bit 4.
11 DB5
Data input -- Bit 5.
12 DB6
Data input -- Bit 6.
13 DB7
Data input -- Bit 7 (MSB).
14 XFER
Transfer enable input. The data is
transferred into the transparent latch at
the high level of XFER.
15 GAIN 0
Digital gain setting input 0.
16 GAIN 1
Digital gain setting input 1.
17 V
REF OUT
Voltage reference output. V
REF OUT
is
referenced to AGND. V
REF OUT
is set
to 2.5V and 5.0V in a low-voltage and
high-voltage operation, respectively
for the ML2350; 2.25V and 4.5V for
the ML2340.
18 V
REF IN
Voltage reference input. V
REF IN
is
referenced to AGND.
PIN CONNECTIONS
V
CC
V
OUT
V
ZS
AGND
DGND
DB0
DB1
DB2
DB3
V
REF IN
V
REF OUT
GAIN 1
GAIN 0
XFER
DB7
DB6
DB5
DB4
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
TOP VIEW
TOP VIEW
V
CC
V
OUT
V
ZS
AGND
DGND
DB0
DB1
DB2
DB3
V
REF IN
V
REF OUT
GAIN 1
GAIN 0
XFER
DB7
DB6
DB5
DB4
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
ML2340
ML2350
18-Pin DIP (P18)
ML2340
ML2350
18-Pin SOIC (S18W)
ML2340, ML2350
3
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
Supply Voltage V
CC
with Respect to AGND ............ 14.2V
DGND ............................................ 0.3V to V
CC
+ 0.3V
V
ZS
, V
REF IN ................................................
0.3V to V
CC
+ 0.3V
Logic Inputs .................................... 0.3V to V
CC
+ 0.3V
Input Current per Pin ............................................ 25mA
Storage Temperature .............................. 65C to +150C
Package Dissipation at T
A
= 25C (Board Mount) ... 875mW
Lead Temperature (Soldering 10 sec.)
Dual-In-Line Package (Molded) .......................... 260C
Dual-In-Line Package (Ceramic) ......................... 300C
Molded Small Outline IC Package
Vapor Phase (60 sec.) ..................................... 215C
Infrared (15 sec.) ............................................ 220C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, T
A
= Operating temperature range, V
CC
AGND = 5V 10% and 12V 10%, V
REF IN
for
ML2340 = 2.25V and 4.50V, for ML2350 V
REF IN
= 2.50V and 5.00V, V
OUT
load is R
L
= 1k
W and C
L
= 100pF, V
REF
load is
R
L
= 1k
W and C
L
= 100pF and input control signals with t
R
= t
F
- 20ns. (Note 1)
ML2340XCX, ML2350XCX
ML2350XIX
PARAMETER
NOTES
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Converter and Programmable Gain Amplifier
Converter Resolution
8
8
Bits
Integral Linearity Error
GAIN = 2, 1,
1
/
2
, or
1
/
4
ML2340BXX, ML2350BXX
1
/
4
1
/
4
LSB
ML2340CXX, ML2350CXX
1
/
2
1
/
2
LSB
Differential Linearity Error
GAIN = 2, 1,
1
/
2
, or
1
/
4
ML2340BXX, ML2350BXX
1
/
4
1
/
4
LSB
ML2340CXX, ML2350CXX
1
/
2
1
/
2
LSB
Mode Select
V
ZS
with respect to AGND
Unipolar Output
0
1.0
0
1.0
V
Bipolar Output
1.50
V
CC
2.25
1.50
V
CC
2.25
V
Offset Error
Figure 1
Unipolar Mode
GAIN =
1
/
4
,
1
/
2
, 1
10
12
mV
GAIN = 2
20
24
mV
Bipolar Mode
Figure 1
GAIN =
1
/
4
,
1
/
2
, 1, 2
10 plus
10 plus
mV
2
1
/
2
LSB
2
1
/
2
LSB
Gain Error
Figure 1
Unipolar Mode
GAIN =
1
/
4
,
1
/
2
, 1, 2
0.5
2
0.5
2.5
%FS
Bipolar Mode
GAIN =
1
/
4
,
1
/
2
, 1, 2
0.5
2
0.5
2.5
%FS
OPERATING CONDITIONS
Supply Voltage, V
CC
.......................... 4.5V
DC
to 13.2V
DC
Temperature Range
ML2350BIJ .......................................... 40C to +85C
ML2340BCP, ML2340CCP
ML2350BCP, ML2350CCP
ML2340BCS, ML2340CCS
ML2350BCS, ML2350CCS ..................... 0C to +70C
ML2340, ML2350
4
ELECTRICAL CHARACTERISTICS
(Continued)
ML2340XCX, ML2350XCX
ML2350XIX
PARAMETER
NOTES
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Reference
V
REF OUT
Voltage
ML2340BXX
V
CC
- 7.0V
T
A
= 25C
2.23
2.25
2.27
2.23
2.25
2.27
V
T
MIN
to T
MAX
2.22
2.28
2.18
2.32
V
V
CC
8.0V
T
A
= 25C
4.48
4.50
4.52
4.48
4.50
4.52
V
T
MIN
to T
MAX
4.46
4.54
4.43
4.57
V
ML2340CXX
V
CC
- 7.0V
T
A
= 25C
2.22
2.25
2.29
2.22
2.25
2.28
V
T
MIN
to T
MAX
2.20
2.30
2.18
2.32
V
V
CC
8.0V
T
A
= 25C
4.45
4.50
4.55
4.45
4.50
4.55
V
T
MIN
to T
MAX
4.40
4.60
4.35
4.65
V
ML2350BXX
V
CC
- 7.0V
T
A
= 25C
2.48
2.50
2.52
2.48
2.50
2.52
V
T
MIN
to T
MAX
2.47
2.53
2.43
2.57
V
V
CC
8.0V
T
A
= 25C
4.98
5.00
5.02
4.98
5.00
5.02
V
T
MIN
to T
MAX
4.96
5.04
4.90
5.10
V
ML2350CXX
V
CC
- 7.0V
T
A
= 25C
2.45
2.50
2.55
2.46
2.50
2.55
V
T
MIN
to T
MAX
2.44
2.58
2.42
2.59
V
V
CC
8.0V
T
A
= 25C
4.95
5.00
5.05
4.95
5.00
5.05
V
T
MIN
to T
MAX
4.90
5.10
4.85
5.15
V
Temperature Coefficient
V
REF OUT
50
50
ppm/C
V
REF
Output Current
0.75
5
0.75
5
mA
V
REF OUT
Power Supply
100mV
PP
, 1kHz
40
60
40
60
dB
Rejection Ratio
Sinewave on V
CC
V
REF IN
and V
ZS
V
REF IN
Input Range
V
CC
- 8.75V
AGND+2
V
CC
1.75 AGND+2
V
CC
1.75
V
V
CC
8.75V
AGND+2
AGND+7 AGND+2
AGND+7
V
V
REF IN
DC Input
10
10
M
Resistance
V
ZS
Voltage Range
2
V
CC
- 7.0V
AGND
V
CC
2.25 AGND
V
CC
2.25
V
Analog Output
V
OUT
Output Swing
Unipolar Mode
2
R
L
= 100k
W
AGND+
V
CC
0.5 AGND+
V
CC
0.5
V
0.01
0.01
R
L
= 1k
W
AGND+
V
CC
1.0 AGND+
V
CC
1.0
V
1.0
1.0
Bipolar Mode
R
L
= 100k
W
AGND+
V
CC
0.1 AGND+
V
CC
0.1
V
0.1
0.1
R
L
= 1k
W
AGND +
V
CC
1.0 AGND +
V
CC
1.0
V
1.0
1.0
V
OUT
Output Current
AGND+1V<V
OUT
<V
CC
1V
10
+10
10
+10
mA
Power Supply
100mV
PP
, 1kHz
60
60
dB
Rejection Ratio
sinewave on V
CC
ML2340, ML2350
5
ELECTRICAL CHARACTERISTICS
(Continued)
ML2340XCX, ML2350XCX
ML2350XIX
PARAMETER
NOTES
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Digital and DC
V
IN(0)
Logical "0"
0.8
0.8
V
Input Voltage
V
IN(1)
Logical "1"
2.0
2.0
V
Input Voltage
I
IN(0)
Logical "0"
V
IN
= DGND
1
1
A
Input Current
I
IN(1)
Logical "1"
V
IN
= V
CC
1
1
A
Input Current
Supply Current,
Bipolar Mode
I
CC
, V
CC
Current
V
CC
= 5V 10%
5.3
5.3
mA
I
AGND
,
Analog Ground Current
5.0
5.0
mA
I
VZS
, V
ZS
Current
90
300
90
300
A
I
CC
, V
CC
Current
V
CC
= 12V 10%
9.3
9.3
mA
I
AGND
,
Analog Ground Current
9.0
9.0
mA
I
VZS
, V
ZS
Current
90
300
90
300
A
Supply Current,
Unipolar Mode
I
CC
, V
CC
Current
3
V
CC
= 5V 10%
6.0
6.0
mA
I
AGND
,
Analog Ground Current
4.3
4.3
mA
I
VZS
, V
ZS
Current
1.7
1.7
mA
I
CC
, V
CC
Current
V
CC
= 12V 10%
11.0
11.0
mA
I
AGND
,
Analog Ground Current
3
7.3
7.3
mA
I
VZS
, V
ZS
Current
3.7
3.7
mA
AC Performance
Settling Time
Figure 2,
t
S1
Output Step of AGND + 1V
1.2
2.5
1.2
3.0
s
to V
CC
1V, R
L
= 1k
W
t
S2
Output Step of
2.5
5
2.5
6
s
AGND + 100mV to
V
CC
100mV, R
L
= 100k
W
t
S3
Output Step of 1LSB
1
1
s
t
S4
, Gain Change
Change of Any Gain Setting
1.1
2.5
1.1
s
t
XFER
, XFER Pulse Width
Figure 3
60
60
ns
t
DBS
, DB0DB7
Figure 3
40
45
ns
Setup Time
t
DBH
, DB0DB7
Figure 3
0
0
ns
Hold Time
t
RESET
, Power-On
16
16
s
Reset Time
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.
Note 2: Supply current and analog ground current are specified with the digital inputs stable and no load on V
OUT
.
Note 3: In unipolar operation with V
ZS
and AGND tied together, digital codes that represent an analog value of less than 100mV from AGND should be avoided.
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