Datasheet SPT1019AIN, SPT1019BIN Datasheet (SPT)

SPT1019

8-BIT, HIGH SPEED D/A CONVERTER

FEATURES

• 275 MWPS Conversion Rate - Version A

• 165 MWPS Conversion Rate - Version B

• Compatible with the HDAC10181
with Improved Performance

• RS-343-A Compatible

• Complete Video Controls: Sync, Blank, Bright
and Reference White (Force High)

• 10KH, 100K ECL Compatible

• Single Power Supply

• Registered Data and Video Controls

• Differential Current Outputs

• Stable On-Chip Bandgap Reference

• ESD Protected Data and Control Inputs

GENERAL DESCRIPTION

The SPT1019 is a monolithic 8-bit digital-to-analog converter
capable of accepting video data at a 165 or 275 MWPS rate.
Complete with video controls (Sync, Blank, Reference White
[Force High], Bright), the SPT1019 directly drives doubly­terminated 50 or 75 ohm loads to standard composite video
levels. The standard setup level is 7.5 IRE. The SPT1019 is

APPLICATIONS

• High Resolution Color or Monochrome Raster
Graphics Displays

• Medical Electronics: CAT, PET, MR Imaging Displays

• CAD/CAE Workstations

• Solids Modeling

• General Purpose High-Speed D/A Conversion

• Digital Synthesizers

• Automated Test Equipment

• Digital Transmitters/Modulators

pin-compatible with the HDAC10181 with improved perfor­mance. The SPT1019 contains data and control input regis­ters, video control logic, reference buffer, and current
switches.

The SPT1019 is available in a 24-lead PDIP package in the
industrial temperature range. Contact the factory for military
temperature and /883 versions.

BLOCK DIAGRAM

Video Controls In

Video Data In

Video Data In

Feedthrough

Convert

I

Set

Ref Out

Sync, Blank, Bright, Ref - High

D0 - D3

4 To 15
Decode

D4 - D7

(MSBs)

4

Bandgap

Reference

4

4

2

Ref

Buffer

Register

4

4

Output

Current

Switches

Out +

Out -

Comp

Signal Processing Technologies, Inc.

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: [phone] FAX: [phone]

ABSOLUTE MAXIMUM RATING (Beyond which damage may occur)

1

Supply Voltages

VEE (measured to VCC) ............................... -7.0 to 0.5 V

Temperature

Operating, ambient ...............................-25 to + 85 °C

junction........................................ + 175 °C

Input Voltages

CONV, Data, and Controls .......................... VEE to 0.5 V

Lead, Soldering (10 seconds)............................ + 300 °C

Storage ....................................................-60 to + 150 °C

(measured to VCC)

Ref+ (measured to VCC) ..............................VEE to 0.5 V

Ref- (measured to VCC)............................... VEE to 0.5 V

Note: 1. Operation at any Absolute Maximum Ratings is not implied. See Electrical Specifications for proper nominal applied

conditions in typical applications.

ELECTRICAL SPECIFICATIONS

VCC =ground, VEE = -5.2 V ±0.3 V, TA =T

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

DC ELECTRICAL CHARACTISTICS

Integral Linearity Error 1.0 mA<I

Differential Linearity Error 1.0 mA<I

Gain Error VI -19 +19 % Full Scale
Gain Error Tempco V 150 PPM/°C
Input Capacitance, Ref Out, I
Compliance Voltage, + Output VI -1.2 1.5 V
Compliance Voltage, - Output VI -1.2 1.5 V
Equivalent Output Resistance VI 20 kΩ
Output Capacitance V 12 pF
Maximum Current, + Output IV 45 mA
Maximum Current, - Output IV 45 mA
Output Offset Current VI 0.05 0.5 LSB
Input Voltage, Logic HIGH VI -1.0 V
Input Voltage, Logic LOW VI -1.5 V
Convert Voltage, IV -0.5 -2.5 V

Common Mode Range (V
Convert Voltage, Differential (V
Input Current, Logic LOW, VI 35 120 µA

Data and Controls
Input Current, Logic HIGH, VI 40 120 µA

Data and Controls
Input Current, Convert VI 2 60 µA
Bandgap Tempco V 100 PPM/°C

Set

ICM

IDF

to T

MIN

)

) IV 0.4 1.2 V

, CC = 0 pF, I

MAX

TEST TEST

<1.3 mA VI -.37 +.37 % Full Scale

Set

<1.3 mA VI -0.2 +0.2 % Full Scale

Set

= 1.105 mA, unless otherwise sprecified.

Set

V5pF

-.95 +.95 LSB

-0.5 +0.5 LSB

SPT

SPT1019

2 5/14/97

ELECTRICAL SPECIFICATIONS

VCC =ground, VEE = -5.2 V ±0.3 V, TA =T

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

Reference Voltage

Measured to V
Input Capacitance, V 3.0 pF
Data and Controls
Power Supply Sensitivity VI -120 20 +120 µA/V
Supply Current VI 155 220 mA

CC

DYNAMIC CHARACTERISTICS (R

Maximum Conversion Rate B Grade IV 165 MWPS

Rise Time 10% to 90% G.S. IV 1.6 ns

Rise Time 10% to 90% G.S. V 1.0 ns

Current Settling Time, Clocked Mode To 0.2% G.S. V 7.0 ns
Current Settling Time, Clocked Mode To 0.8% G.S. V 5.5 ns
Current Settling Time, Clocked Mode To 0.2% G.S. V 4.5 ns

t

SI

Clock to Output Delay, Clocked Mode IV 2.2 4.0 ns

t

DSC

Data to Output Delay, IV 3.2 6.0 ns
Transparent Mode t
Convert Pulse Width, ( LOW or HIGH) B Grade IV 3.0 ns

t

, t

PWL

PWH

Glitch Energy Area = 1/2 VT V 4 pV-s
Reference Bandwidth, -3 dB V 1.0 MHz
Setup Time, Data and Controls IV 1.0 ns

t

S

Hold Time, Data and Controls IV 0.5 ns

t

H

Slew Rate 20% to 80% G.S. IV 390 V/µS

Clock Feedthrough IV -48 dB

DST

to T

MIN

= 37.5 ohms, CL = 5 pF, TA = 25 °C, I

L

, CC = 0 pF, I

MAX

TEST

A Grade IV 275 MWPS

TA = T

RL = 25 ohms

RL = 25 Ω

TA = T

A Grade IV 1.8 ns

TA = T

TA = T

TA = T

TA = T

MIN

MIN

MIN

MIN

MIN

MIN

to T

to T

to T

to T

to T

to T

= 1.105 mA, unless otherwise specified.

Set

VI 1.3 -1.2 1.0 V

= 1.105 mA)

Set

MAX

MAX

MAX

MAX

MAX

MAX

IV 2.0 ns

IV 4.5 ns

IV 6.0 ns

IV 1.0 ns

IV 0.5 ns

IV 325 V/µS

IV -48 dB

TEST LEVEL CODES

All electrical characteristics are subject to the
following conditions:

All parameters having min/max specifications
are guaranteed. The Test Level column indi­cates the specific device testing actually per­formed during production and Quality Assur­ance inspection. Any blank section in the data
column indicates that the specification is not
tested at the specified condition.

SPT

TEST LEVEL

I

II

III
IV

V

VI

3 5/14/97

TEST PROCEDURE

100% production tested at the specified temperature.
100% production tested at TA = +25 °C, and sample

tested at the specified temperatures.
QA sample tested only at the specified temperatures.
Parameter is guaranteed (but not tested) by design

and characterization data.
Parameter is a typical value for information purposes

only.
100% production tested at TA = +25 °C. Parameter is

guaranteed over specified temperature range.

SPT1019

Figure 1 - Functional Diagram

D0 - D7

Composite

Video Controls

CONV
CONV

Feedthrough

8

4

2

V

EE

V

CC

Decoding

Logic

APPLICATION INFORMATION

The SPT1019 is a high speed video digital-to-analog con­verter capable of conversion rates of up to 275 MWPS. This
makes the device suitable for driving 1500 X 1800 pixel
displays at 70 to 90 Hz update rates.

Data

Registers

Bandgap

Reference

Current

Sources

And

Switches

Current

Source

Biasing

Amp

+-

I

Ref Out

Set

Out +
Out -

coarse output levels. The remaining four LSBs drive four
binary weighted current switches.

The MSB currents are then summed with the LSBs, which
provide a one-sixteenth of full scale contribution, to provide
the 256 distinct analog output levels.

The SPT1019 is separated into different conversion rate
categories as shown in table I.

The SPT1019 has 10 KH and 100K ECL logic level compat­ible video controls and data inputs. The complementary
analog output currents produced by the devices are propor­tional to the product of the digital control and data inputs in
conjunction with the analog reference current. The SPT1019
is segmented so that the four MSBs of the input data are
separated into a parallel thermometer code. From here,
fifteen identical current sinks are driven to fabricate sixteen

Table I - The SPT1019 Family and Speed Designations

PART NUMBER UPDATE COMMENTS

SPT1019A 275 MWPS Suitable for 1200 X 1500 to 1500 X 1800

SPT1019B 165 MWPS Suitable for 1024 X 1280 to 1200 X 1500

The video control inputs drive weighted current sinks that are
added to the output current to produce composite video
output levels. These controls, Sync, Blank, Reference White
(Force High), and Bright are needed in video applications.

Another feature that similar video D/A converters do not have
is the Feedthrough Control. This pin allows registered or
unregistered operation of the video control and data inputs.
In the registered mode, the composite functions are latched
to the pixel data to prevent screen-edge distortions generally
found on unregistered video DACs.

displays at 60 to 90 Hz update rate.

displays at 60 to 90 Hz update rate.

SPT

SPT1019

4 5/14/97

Figure 2 - Typical Interface Circuit

Video Monitor

Video

Control

Inputs

Video

Data

Inputs

Clock

R

500 Ω

1

FT
FH
Blank
BRT
Sync

D0 (LSB)
D1
D2
D3

D4
D5
D6
D7 (MSB)

CONV

CONV

R

750 Ω

2

I

Set

.01 µF

COMP

Out-

R

3

50/75 Ω

Out+

NOTES:

1.

V- = -1.2 V (typical) for LM113.

2.

V+ = -1.2 V

I

3.

Set

R

4.
V

5.

6.

V

7.

FB = Ferrite bead, Fair-rite P/N 217430011 or equivalent.

8.

All reference resistors 1/8 W 1% metal film power.

supply decoupling 50 V ceramic disc.

9.

10.
See figure 8 for detail on Ref Buffer.

11

.

Ref Out on the SPT1019 can be used to drive up to

12.
two SPT1018 reference inputs.

13.

= DGND (digital input drivers).

4

4

Output

.01 µF

C Comp

Current

Switches

Register

4 To 15

Decode

I

V+

Set

Ref

Buffer

Ref Out

FB

V

CC

.01 µF

10 µF

Bandgap

Reference

V

EE

-5.2 V

=

α

T(R

= R3 / / R4

L

=

Out

­ = (K x I

Sync

K = 15.8069
K

= 1.7617

1

= 10.0392

K

2

= ECL termination.

x

= VCC = AGND

50/75 Ω COAX

V+

)

1+R2

255-Digital Input Code

255

x RL) + (K2 x I

Set

R

4

50/75 Ω

x I

Set

Set

x RL)

x I

K

R

L +

x RL (Bright)K

Set

I

TYPICAL INTERFACE CIRCUIT

GENERAL

A typical interface circuit using the SPT1019 in a color raster
application is shown in figure 2. The SPT1019 requires few
external components and is extremely easy to use. The very
high operating speeds of the SPT1019 require good circuit
layout, decoupling of supplies, and proper design of trans­mission lines. The following considerations should be noted
to achieve best performance.

INPUT CONSIDERATIONS

Video input data and controls may be directly connected to
the SPT1019. Note that all ECL inputs are terminated as
closely to the device as possible to reduce ringing, crosstalk
and reflections. A convenient and commonly used microstrip
impedance is about 130 ohms, which is easily terminated
using a 330 ohm resistor to VEE and a 220 ohm resistor to
Ground. This arrangement gives a Thevenin equivalent ter­mination of 130 ohms to -2 volts without the need for a

-2 volt supply. Standard SIP (Single Inline Package) 220/330
resistor networks are available for this purpose. It is recom­mended that stripline or microstrip techniques be used for all
ECL interface. Printed circuit wiring of known impedance
over a solid ground plane is recommended.

OUTPUT CONSIDERATIONS

The analog outputs are designed to directly drive a dual 50 or
75 ohm load transmission system as shown. The source
impedances of the SPT1019 outputs are high impedance
current sinks. The load impedance (RL) must be 25
or 37.5 ohms to attain standard RS-343-A video levels. Any
deviation from this impedance will affect the resulting video
output levels proportionally. As with the data interface, it is
important that the analog transmission lines have matched
impedance throughout, including connectors and transitions
between printed wiring and coaxial cable. The combination of
matched source termination resistor RS and load terminator
RL minimizes reflections of both forward and reverse travel­ing waves in the analog transmission system. The return path
for analog output current is V

which is connected to the

CC

source termination resistor RS.

SPT

SPT1019

5 5/14/97

POWER CONSIDERATIONS

The SPT1019 operates from a single -5.2 V standard supply.
Proper bypassing of the supplies will augment the SPT1019’s
inherent supply noise rejection characteristics. As shown in
figure 2, each supply pin should be bypassed as close to the
device as possible with 0.01 µF and 10 µF capacitors.

The SPT1019 has two analog (VEE) power supply pins. Both
supply pins should be properly bypassed as mentioned
previously. This device also has two analog (VCC) ground
pins. Both ground pins should be tied to the analog ground
plane. Power and ground pins must be connected in all
applications. If a +5 V power source is required, the ground
pins (VCC) become the positive supply pins while the supply
pins (VEE) become the ground pins. The relative polarities of
the other input and output voltages must be maintained.

The output of the buffer amplifier is the reference for the
current sinks. The amplifier feedback loop is connected
around one of the current sinks to achieve better accuracy.
(See Figure 8.)

Since the analog output currents are proportional to the digital
input data and the reference current (I
output may be adjusted by varying the reference current. I
is controlled through the I
and equations to set I

input on the SPT1019. A method

Set

is shown in Figure 2. The SPT1019

Set

uses its own reference voltage for setting up I
Figure 2. The value for I

can be varied with the 500 Ohm

Set

), the full-scale

Set

as shown in

Set

SET

trimmer to change the full scale output. A double 50 Ohm load
(25 Ohm) can be driven if I

is increased 50% more than I

Set

Set

for doubly terminated 75 Ohm video applications.

COMPENSATION

REFERENCE CONSIDERATIONS

The SPT1019 has one reference input (I

) and one refer-

Set

ence output (Ref Out). These pins are connected to the
inverting and noninverting inputs of an internal amplifier that
serves as a reference buffer amplifier. The SPT1019 has a
bandgap reference connected internally to the inverting input
of the buffer amplifier and Ref Out.

Figure 3 - Timing Diagram

CONV

-1.3 V
CONV

t

S

-1.3 V

Data Control

The SPT1019 provides an external compensation input
(COMP) for the reference buffer amplifier. In order to use this
pin correctly, a capacitor should be connected between
COMP and VEE as shown in figure 2. Keep the lead lengths
as short as possible. If the reference is to be kept as a
constant, use a large capacitor (.01 µF). The value of the
capacitor determines the bandwidth of the amplifier. If modu­lation of the reference is required, smaller values of capaci­tance can be used to achieve up to a 1 MHz bandwidth.

t

PWH

t

PWL

t

H

Inputs

t

DST

SPT

OUT -

OUT +

t

DSC

t

SI

1/2 LSB

1/2 LSB

SPT1019

6 5/14/97

Table II - Video Control Operation (Output values for setup = 10 IRE and 75 ohm standard load)

Sync Blank

1 X X X X 28.57 -1.071 -40 Sync Level

0 1 X X X 20.83 -0.781 0 Blank Level

0 0 1 1 X 0.00 0.000 110 Enhanced High Level

0 0 1 0 X 1.95 -0.073 100 Normal High Level

0 0 0 0 000... 19.40 -0.728 7.5 Normal Low Level

0 0 0 0 111... 1.95 -0.073 100 Normal High Level

0 0 0 1 000... 17.44 -0.654 17.5 Enhanced Low Level

0 0 0 1 111... 0.00 0.000 110 Enhanced High Level

Ref

White Bright

Data

Input Out - (mA) Out - (V) Out - (IRE) Description

DATA INPUTS AND VIDEO CONTROLS

The SPT1019 has standard single-ended data inputs. The
inputs are registered to produce the lowest differential data
propagation delay (skew) to minimize glitching. There are
also four video control inputs to generate composite video
outputs. These are Sync, Blank, Bright and Reference White
or Force High. Also provided is the Feedthrough control as
mentioned earlier. The controls and data inputs are all 10 KH
and 100K ECL compatible. In addition, all have internal
pulldown resistors to leave them at a logic low so the pins are
inactive when not used. This is useful if the devices are
applied as standard DACs without the need for video controls
or if less than eight bits are used.

The SPT1019 is usually configured in the synchronous
mode. In this mode, the controls and data are synchronized
to prevent pixel dropout. This reduces screen-edge distor­tions and provides the lowest output noise while maintaining
the highest conversion rate. By leaving the Feedthrough (FT)
control open (low), each rising edge of the convert (CONV)
clock latches decoded data and control values into a D-type
internal register. The registered data is then converted into
the appropriate analog output by the switched current sinks.
When FT is tied high, the control inputs and data are not
registered. The analog output asynchronously tracks the
input data and video controls. Feedthrough itself is asynchro­nous and usually used as a DC control.

The video controls produce the output levels needed for
horizontal blanking, frame synchronization, etc., to be com­patible with video system standards as described in
RS-343-A. Table II shows the video control effects on the
analog output. Internal logic governs Blank, Sync, and Force
High so that they override the data inputs as needed in video
applications. Sync overrides both the data and other controls
to produce full negative video output (figure 9).

Reference White video level output is provided by Force
High, which drives the internal digital data to full scale output
or 100 IRE units. Bright gives an additional 10% of full scale
value to the output level. This function can be used in graphic
displays for highlighting menus, cursors or warning mes­sages. Again, if the devices are used in non-video applica­tions, the video controls can be left open.

CONVERT CLOCK

For best performance, the clock should be ECL driven,
differentially, by utilizing CONV and

(figure 4). By

CONV

driving the clock this way, clock noise and power supply/
output intermodulation will be minimized. The rising edge of
the clock synchronizes the data and control inputs to the
SPT1019. Since the actual switching threshold of

CONV

is
determined by CONV, the clock can be driven single-ended
by connecting a bias voltage to

. The switching thresh-

CONV

old of CONV is set by this bias voltage.

The controls and data have to be present at the input pins for
a setup time of ts before, and a hold time of th after, the rising
edge of the clock (CONV) in order to be synchronously
registered. The setup and hold times are not important in the
asynchronous mode. The minimum pulse widths high (t
and low (t

) as well as settling time become the limiting

PWL

PWH

factors. (See figure 3.)

SPT

ANALOG OUTPUTS

The SPT1019 has two analog outputs that are high imped­ance, complementary current sinks. The outputs vary in

)

proportion to the input data, controls and reference current
values so that the full scale output can be changed by setting
I

as mentioned earlier.

Set

In video applications, the outputs can drive a doubly termi-

SPT1019

7 5/14/97

nated 50 or 75 ohm load to standard video levels. In the
standard configuration of figure 5, the output voltage is the
product of the output current and load impedance and is
between 0 and -1.07 V. The Out- output (figure 9) will provide
a video output waveform with the Sync pulse bottom at the

-1.07 V level. The Out+ is inverted with Sync up.

Figure 4 - CONVert,

V

IDF

V

ICM MAX

CONVert

Switching Levels

0.0 V
V

ICM MIN

-1.3 V

CONV

CONV

Figure 5A -Standard Load

Video Monitor

SPT1019

OUT-

OUT +

R

75 Ω

R

75 Ω

S

S

75 Ω COAX

75 Ω COAX

75 Ω

75 Ω

R

L

Inverse

Video

R

L

TYPICAL RGB GRAPHICS SYSTEM

In an RGB graphics system, the color displayed is determined
by the combined intensities of the red, green and blue (RGB)
D/A converter outputs. A change in gain or offset in any of the
RGB outputs will affect the apparent hue displayed on the
CRT screen.

Thus, it is very important that the outputs of the D/A convert­ers track each other over a wide range of operating condi­tions. Since the D/A output is proportional to the product of the
reference and digital input code, a common reference should
be used to drive all three D/As in an RGB system to minimize
RGB DAC-to-DAC mismatch and improve TC tracking.

The SPT1019 contains an internal precision bandgap refer­ence which completely eliminates the need for an external
reference. The reference can supply up to 50 µA to an
external load, such as two other DAC reference inputs.

The circuits shown in figure 6 illustrate how a single SPT1019
may be used as a master reference in a system with multiple
DACs (such as RGB). The other DACs are simply slaved from
the SPT1019’s reference output. The SPT1018s shown are
especially well-suited to be slaved to a SPT1019 for a better
TC tracking from DAC-to-DAC, since they are essentially
SPT1019s without the reference. The SPT1018 is pin-com­patible with the TDC1018, that does not have an internal
reference. Although either the TDC1018 or the SPT1018 may
be slaved from an SPT1019, the higher performance
SPT1018 and the above mentioned DAC-to-DAC TC track­ing is the best choice for new designs.

Figure 5B -Test Load

OUT +

OUT -

C

L

<5 pF

R

37.5Ω

No external reference is required for operation of the
SPT1019, as this function is provided internally. The internal
reference is a bandgap type and is suitable for operation over

Video Out
0 to -1 Volt

L

extended temperature ranges. The SPT1018 must use an
external reference.

SPT

SPT1019

8 5/14/97

Figure 6 - Typical RGB Graphics System

Figure 7 - Burn-In Circuit

R

500 Ω

1

SPT1019

(Master)

I

Set

R

2

750 Ω

I

Set

-5.9 V

(Max 200 mA)

-1.2 V

(Max 1.5 mA)

Ref Out

I

Ref

1 kΩ

SPT1018

R G

(Slave)

750 Ω500 Ω

I

Set

1 kΩ

6.5 Ω

V

Ref Out

6.5 Ω

EE

SPT1018

(Slave)

Ref-Ref+

750 Ω500 Ω

I

Set

Out-

Out+

24 Pin DIP

(Max 50 mA)

(Max 50 mA)

100 Ω

All Resistors Are 5% 1/4 W cc

Clock = -0.9 to -1.7 V, 100 kHz

Ref-Ref+

1 kΩ

100 Ω

B

Figure 8 - DAC Output Circuit

I

Set

Ref Out

-1.3 V

(Max 60 µA)

Clock

(Max 60 µA)

Reference

Amplifier

+

-

1 kΩ

1 kΩ

Reference

Current

CONV

CONV

Current
Sink #1

1 kΩ

I

Set

(Max 1.5 mA)

V

CC

Current

Sink #N

Out+

Out-

I

Seg

I

Seg

V

EE

SPT

Comp

SPT1019

9 5/14/97

Figure 9 - Video Output Waveform for Standard Load

I

Bias

V

EE

V

CC

Reference

Segment

Switch

Ref Out

I

Set

I

Bias

I

Bias

IRE

110

100

0 mV

-73 mV

Bright

Normal High (White)

256 Gray Levels

Normal Low (Black)

7.5

-40

0

-728 mV

-781 mV

-1071 mV

Blank

Figure 10- Equivalent Input Circuit - Data, Clock, Controls and Reference

Video

Sync

Conv

Data and

Controls

Conv

80 kΩ

I

I

Bias

Bias

V

V

EE

EE

V

SPT

SPT1019

10 5/14/97

24

1

PACKAGE OUTLINE

24-Lead PDIP

INCHES MILLIMETERS

SYMBOL MIN MAX MIN MAX

K

I

J

A
B
C
D
E

F
G
H

I

J
K

0.125

0.015

0.100 typ

0.055

0.008

0.150 typ

0.600

0.530

1.245

0.070

0.190

0.135

0.022

0.065

0.012

0.625

0.550

1.255

0.080

3.18

0.38

2.54 typ

1.40

0.20

3.81 typ

15.24

13.46

31.62

1.78

4.83

3.43

0.56

1.65

0.30

15.88

13.97

31.88

2.03

H

A

B

C

D

E

F

G

SPT

SPT1019

11 5/14/97

PIN ASSIGNMENTS PIN FUNCTIONS

Name Function

D3
D2

D1
D0

V

EE

CONV
CONV

FT

V

CC

FH

Blank

BRT

1

2

3

4

5

6

7

8

9

10

11

12

PDIP

24

23

22

21

20

19

18

17

16

15

14

13

D4
D5
D6
D7
V

EE

Out +
Out ­V

CC

Comp

I

Set

Ref Out
Sync

D3 Data Bit 3
D2 Data Bit 2
D1 Data Bit 1
D0 Data Bit 0 (LSB)
V

EE

Negative Supply

CONV Convert Clock Input

CONV

Convert Clock Input Complement
FT Register Feedthrough Control
V

CC

Positive Supply
FH Data Force High Control
Blank Video Blank Input
BRT Video Bright Input
Sync Video Sync Input
Ref Out Reference Output
I

Set

Reference Current + Input
COMP Compensation Input
Out- Output Current Negative
Out+ Output Current Positive
D7 Data Bit 7 (MSB)
D6 Data Bit 6
D5 Data Bit 5
D4 Data Bit 4

ORDERING INFORMATION

PART NUMBER DESCRIPTION TEMPERATURE RANGE PACKAGE

SPT1019AIN 8-BIT, 275 MWPS DAC -25 to +85 °C 24L PDIP
SPT1019BIN 8-BIT, 165 MWPS DAC -25 to +85 °C 24L PDIP

Signal Processing Technologies, Inc. reserves the right to change products and specifications without notice. Permission is hereby expressly
granted to copy this literature for informational purposes only. Copying this material for any other use is strictly prohibited.

WARNING - LIFE SUPPORT APPLICATIONS POLICY - SPT products should not be used within Life Support Systems without the specific
written consent of SPT. A Life Support System is a product or system intended to support or sustain life which, if it fails, can be reasonably
expected to result in significant personal injury or death.

Signal Processing Technologies believes that ultrasonic cleaning of its products may damage the wire bonding, leading to device
failure. It is therefore not recommended, and exposure of a device to such a process will void the product warranty.

SPT1019

SPT

12 5/14/97