Micro Linear Corporation ML2350CIS-5, ML2350CCS-12, ML2350CCS-5, ML2350CIS-12, ML2350CCP-5 Datasheet

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 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
scale (VZS) in the unipolar mode or around zero scale
(VZS) in the bipolar mode, both with programmable gain.
VZS can be set to any voltage from AGND to 2.25V below
VCC. 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 VCC 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

■ Programmable output voltage gain settings of 2, 1,

1

/2, 1/4 provide 8-, 9-, 10-, or 11-bit effective resolution

around zero

■ AGND to V

■ Bipolar or unipolar output voltage

■ 4.5V to 13.2V single supply or ±2.25V to ±6.5V

dual-supply operation

■ Transparent latch allows microprocessor interface

with 30ns setup time

■ Data flow-through mode

■ Voltage reference output

ML2340 ........................................... 2.25V or 4.50V

ML2350 ........................................... 2.50V or 5.00V

■ Nonlinearity....................................±

■ Output voltage settling time over temperature and

supply voltage tolerance

Within 1V of VCC and AGND ................... 2.5µs max

Within 100mV of VCC and AGND ............... 5µs max

■ TTL and CMOS compatible digital inputs

■ Low supply current (5V supply) ..................... 5mA max

■ 18-pin DIP or surface mount SOlC

output voltage swing

CC

1

/4 LSB or ±1/2 LSB

BLOCK DIAGRAM

V

REFOUT

V

DGND

REFIN

XFER

V

REF

DB0

(LSB)

V

ZS

8-BIT D/A

DATA LATCH

V

CC

DB7

(MSB)

AGND

–

OP

AMP

+

RESISTORS
SWITCHES

DECODERS

GAIN 0 GAIN 1

V

OUT

* This Part Is Obsolete
** This Part Is End Of Life As Of August 1, 2000

1

ML2340, ML2350

PIN CONNECTIONS

ML2340
ML2350

18-Pin DIP (P18)

V

1

CC

V

AGND

DGND

OUT

V

DB0
DB1
DB2
DB3

ZS

2

3

4

5

6

7

8

9

TOP VIEW

V

18

REF IN

V

17

REF OUT

GAIN 1

16

GAIN 0

15

XFER

14

DB7

13

DB6

12

DB5

11

DB4

10

V

V

OUT

AGND

DGND

DB0
DB1
DB2
DB3

ML2340
ML2350

18-Pin SOIC (S18W)

1

CC

2
3

V

ZS

4
5
6
7
8
9

TOP VIEW

PIN DESCRIPTION

PIN NAME FUNCTION PIN NAME FUNCTION

1V

CC

2V

OUT

3V

ZS

4 AGND Analog ground.
5 DGND Digital ground. This is the ground

6 DB0 Data input — Bit 0 (LSB).
7 DB1 Data input — Bit 1.

Positive supply.
Voltage output of the D/A converter.

V

is referenced to VZS.

OUT

Zero Scale Voltage. V

is referenced

OUT

to VZS. VZS 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, VZS has a maximum current
requirement of –300µA in the bipolar
mode.

reference level for all digital inputs.
The range is AGND - DGND - VCC –

4.5V. DGND is normally tied to
system ground.

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

referenced to AGND. V

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

referenced to AGND.

18

V

REF IN

17

V

REF OUT

16

GAIN 1

15

GAIN 0

14

XFER

13

DB7

12

DB6

11

DB5

10

DB4

REF OUT

REF OUT

REF IN

is

is set

is

2

ML2340, ML2350

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 VCC with Respect to AGND ............ 14.2V

DGND ............................................ –0.3V to VCC + 0.3V

VZS, V

................................................–0.3V to V

REF IN

+ 0.3V

CC

OPERATING CONDITIONS

Supply Voltage, VCC.......................... 4.5VDC to 13.2V

Temperature Range

ML2350BIJ .......................................... –40°C to +85°C

ML2340BCP, ML2340CCP
ML2350BCP, ML2350CCP
ML2340BCS, ML2340CCS

ML2350BCS, ML2350CCS ..................... 0°C to +70°C

Logic Inputs .................................... –0.3V to VCC + 0.3V

Input Current per Pin ............................................ ±25mA

Storage Temperature..............................–65°C to +150°C

Package Dissipation at TA = 25°C (Board Mount) ... 875mW
Lead Temperature (Soldering 10 sec.)

Dual-In-Line Package (Molded).......................... 260°C

Dual-In-Line Package (Ceramic)......................... 300°C

Molded Small Outline IC Package

Vapor Phase (60 sec.) ..................................... 215°C

Infrared (15 sec.) ............................................ 220°C

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, TA = Operating temperature range, VCC – AGND = 5V ±10% and 12V ±10%, V
ML2340 = 2.25V and 4.50V, for ML2350 V
RL = 1kW and CL = 100pF and input control signals with tR = tF - 20ns. (Note 1)

= 2.50V and 5.00V, V

REF IN

load is RL = 1kW and CL = 100pF, V

OUT

ML2340XCX, ML2350XCX ML2350XIX

REF IN

for

REF

DC

load is

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,

ML2340BXX, ML2350BXX ±1/4 ±1/4 LSB
ML2340CXX, ML2350CXX ±1/2 ±1/2 LSB

Differential Linearity Error GAIN = 2, 1,

ML2340BXX, ML2350BXX ±1/4 ±1/4 LSB
ML2340CXX, ML2350CXX ±1/2 ±1/2 LSB

Mode Select V

Unipolar Output 0 1.0 0 1.0 V
Bipolar Output 1.50 VCC–2.25 1.50 VCC–2.25 V

Offset Error Figure 1

Unipolar Mode GAIN = 1/4, 1/2, 1 ±10 ±12 mV

Bipolar Mode Figure 1

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

with respect to AGND

ZS

GAIN = 2 ±20 ±24 mV

GAIN =

1

/2, or 1/4

1

/2, or 1/4

1

/4, 1/2, 1, 2 ±10 plus ±10 plus mV

±21/2 LSB ±21/2 LSB

3

ML2340, ML2350

ELECTRICAL CHARACTERISTICS (Continued)

ML2340XCX, ML2350XCX ML2350XIX

PARAMETER NOTES CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Reference
V

ML2340BXX V

ML2340CXX V

ML2350BXX V

ML2350CXX V

Temperature Coefficient

V
V
V

Rejection Ratio Sinewave on V
V

V

V
Resistance

VZS Voltage Range 2 VCC - 7.0V AGND VCC–2.25 AGND VCC–2.25 V

Analog Output

V

Unipolar Mode 2 R

Bipolar Mode R

V
Power Supply 100mV

Rejection Ratio sinewave on V

Voltage

REF OUT

REF OUT

Output Current 0.75 5 0.75 5 mA

REF

Power Supply 100mV

REF OUT

and V

REF IN

REF IN

ZS

Input Range VCC - 8.75V AGND+2 VCC–1.75 AGND+2 VCC–1.75 V

- 7.0V TA = 25°C 2.23 2.25 2.27 2.23 2.25 2.27 V

CC

V

• 8.0V TA = 25°C 4.48 4.50 4.52 4.48 4.50 4.52 V

CC

- 7.0V TA = 25°C 2.22 2.25 2.29 2.22 2.25 2.28 V

CC

V

• 8.0V TA = 25°C 4.45 4.50 4.55 4.45 4.50 4.55 V

CC

- 7.0V TA = 25°C 2.48 2.50 2.52 2.48 2.50 2.52 V

CC

• 8.0V TA = 25°C 4.98 5.00 5.02 4.98 5.00 5.02 V

V

CC

- 7.0V TA = 25°C 2.45 2.50 2.55 2.46 2.50 2.55 V

CC

• 8.0V TA = 25°C 4.95 5.00 5.05 4.95 5.00 5.05 V

V

CC

T

T

T

T

T

T

T

T

MIN

MIN

MIN

MIN

MIN

MIN

MIN

MIN

to T

to T

to T

to T

to T

to T

to T

to T

MAX

MAX

MAX

MAX

MAX

MAX

MAX

MAX

2.22 2.28 2.18 2.32 V

4.46 4.54 4.43 4.57 V

2.20 2.30 2.18 2.32 V

4.40 4.60 4.35 4.65 V

2.47 2.53 2.43 2.57 V

4.96 5.04 4.90 5.10 V

2.44 2.58 2.42 2.59 V

4.90 5.10 4.85 5.15 V

50 50 ppm/°C

, 1kHz –40 –60 –40 –60 dB

P–P

CC

VCC • 8.75V AGND+2 AGND+7 AGND+2 AGND+7 V

DC Input 10 10 M ý

REF IN

Output Swing

OUT

= 100kW AGND+ VCC–0.5 AGND+ VCC–0.5 V

L

0.01 0.01

= 1kW AGND+ VCC–1.0 AGND+ VCC–1.0 V

R

L

1.0 1.0

= 100kW AGND+ VCC–0.1 AGND+ VCC–0.1 V

L

0.1 0.1

R

= 1kW AGND + VCC–1.0 AGND + VCC–1.0 V

L

1.0 1.0

Output Current AGND+1V<V

OUT

OUT<VCC

, 1kHz –60 –60 dB

P–P

CC

–1V –10 +10 –10 +10 mA

4