INTERSIL HI1106JCP

HI1106
®
January 1998
Features
NS
ESIG
D
EW
t
RN
O
F
ter a
n
D
e
E
C
1
END
/tsc
port
I1 1 7
OMM See H cal Sup rsil.com
C
E
i
R
c hn
. i nt e
N OT
r Te r w w w
u
High
o
o
t
ntac ERSIL
o
c
T
or
8-IN
1-88
8-Bit, 35 MSPS,
Speed D/A Converter (TTL Input)
Description
• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-Bit
• High Speed Operation . . . . . . . . . . . . . . . . . . . . . 35MHz
(Maximum Conversion Speed)
• Non-Linearity . . . . . . . . . . . . . . . . . Less Than ±1/2 LSB
The HI1106 is an 8-bit, 35MHz, high-speed D/A converter
IC. Summing type current for the upper 2 bits and ladder
type resistance for the lower 6 bits, ensures a low power
consumption of 200mW (single power supply).
• Low Glitch
This IC is suitable for digital TVs, graphic displays and otherapplications.
• TTL Compatible Input
Ordering Information
• Power Supply
- Single . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V
- Dual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5V
• Low Power Consumption
- +5V Single Power Supply (Typ) . . . . . . . . . . 200mW
- ±5V Dual Power Supply (Typ) . . . . . . . . . . . . 400mW
PART
NUMBER
TEMP.
RANGE (oC)
PACKAGE
PKG. NO.
HI1106JCB
-20 to 75
24 Ld SOIC
M24.2-S
HI1106JCP
-20 to 75
24 Ld PDIP
E24.4-S
• Direct Replacement for the Sony CXA1106
Pinout
HI1106
(PDIP, SOIC)
TOP VIEW
VREF 1
24 VSET
AGND1 2
23 VEE
AGND2 3
22 NC
AOUT 4
21 NC
DGND2 5
20 D0 (LSB)
VCC 6
19 D1
DGND1 7
18 D2
NC 8
17 D3
CLK 9
16 D4
D7 (MSB) 10
15 D5
NC 11
14 NC
D6 12
13 NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
10-1
File Number
4113.3
HI1106
Functional Block Diagram
DGND2
5
INPUT BUFFER
D5 15
D4 16
DIGITAL DATA INPUT
D3 17
D2 18
3
6
D1 19
4
3
6
CURRENT SWITCH
2
CLOCK SYNCHRONIZED
CIRCUIT
D6 12
DECODER
23 VEE
D7
10
(MSB)
D0 20
(LSB)
VCC
R
R
R
2R
R
2R
R
2R
R
2R
R
2R
CLOCK
BUFFER
6
3
-+
7
VSET
AGND1
INTERNAL
REFERENCE
VOLTAGE
24
CLK DGND1
AGND2
R
2
9
AOUT
ANALOG OUTPUT
1
VREF
Pin Descriptions
PIN NO.
SYMBOL
1
VREF
EQUIVALENT CIRCUIT
AGND1
2
AGND2
1
DESCRIPTION
Internal Reference Voltage Output pin 1.2V (Typ). An
external pull down resistance is necessary. For
reference see Notes on Application 1.
VEE 23
2
AGND1
Set to Analog VCC for signal power supply and to
Analog GND for dual power supply. Connect to
AGND2 and use.
3
AGND2
Connect to AGND1.
4
AOUT
Analog Output pin.
AGND2
3
RO
4
VEE 23
Set to Digital VCC for signal power supply and to
Digital GND for dual power supply.
5
DGND2
6
VCC
Digital VCC .
7
DGND1
Digital GND.
10-2
HI1106
Pin Descriptions
PIN NO.
SYMBOL
8
NC
9
CLK
(Continued)
EQUIVALENT CIRCUIT
DESCRIPTION
No Connect.
Clock Input pin.
VCC
6
9
7
DGND1
10, 12,
15 - 20
D7, D6,
D5 - D0
Digital Input pin. D1 to MSB, D8 to LSB
VCC
6
10, 12
15 TO 20
DGND1
7
11, 13, 14
NC
No Connect
21, 22
NC
Connect to AGND or VEE .
23
VEE
Set to Analog GND for single power supply and to VEE
for dual power supply.
24
VSET
AGND1
Bias Input pin. Normally set VSET - VEE to 0.84V. For
reference see Notes on Application 1.
2
24
VEE 23
NOTE: See the Application Circuit for reference.
10-3
HI1106
Absolute Maximum Ratings TA = 25oC
Thermal Information
Supply Voltage
VCC - DGND1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0V to 6V
VEE - AGND1, AGND2 . . . . . . . . . . . . . . . . . . . . . . . . . . -6V to 0V
DGND2 - DGND1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0V to 6V
Digital Input Voltage
VI . . . . . . . . . . . . . . . . . . . . . . . . . . . DGND1 - 0.3V to VCC + 0.3V
VCLK . . . . . . . . . . . . . . . . . . . . . . . . DGND1 - 0.3V to VCC + 0.3V
Input Voltage (V SET Pin), VSET . . . . . . . . VEE - 0.3V to VEE + 2.7V
Output Current (V REF Pin), lREF . . . . . . . . . . . . . . . . . -5mA to 0mA
Thermal Resistance (Typical, Note 2)
θJA (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
Maximum Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . 1.27W
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC
Maximum Storage Temperature Range, TSTG . . . . -55oC to 150oC
Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
Recommended Operating Conditions
SINGLE POWER SUPPLY
MIN
TYP
MAX
Supply Voltage
VCC, DGND2, AGND1, AGND2 . . . . . . . . 4.75V
5V
5.25V
DGND2 - AGND1, DGND2 - AGND2 . . . . -0.2V
0V
0.2V
AGND1 - AGND2 . . . . . . . . . . . . . . . . . . . -0.1V
0V
0.1V
Digital Input Voltage
H Level, VIH, VCLKH . . . . . . . . . . . . . . . . . 2.0V
VCC
L Level, VIL, VCLKL . . . . . . . . . . . . . . . . . .DGND1 1V
VSET Input Voltage, VSET . . . . . . . . . . . . . . 0.70V 0.84V
1V
VREF Pin Current, IREF . . . . . . . . . . . . . . . .-3.0mA
-0.4mA
Clock Pulse Width (Note 1)
tPW1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10ns
tPW0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10ns
Temperature Range, TOPR . . . . . . . . . . . . . . . . . . . . -20oC to 75oC
DUAL POWER SUPPLY
Supply Voltage
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGND2 - AGND1, DGND2 - AGND2 . . .
AGND1 - AGND2. . . . . . . . . . . . . . . . . . .
Digital Input Voltage
H Level, VIH , VCLKH . . . . . . . . . . . . . . . .
L Level, VIL , VCLKL . . . . . . . . . . . . . . . . .
VSET Input Voltage, VSET. . . . . . . . . . . . . .
VREF Pin Current, IREF. . . . . . . . . . . . . . . .
Clock Pulse Width
tPW1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
tPW0. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MIN
TYP
MAX
4.75V
-5.5V
-0.2V
-0.1V
5V
5V
0V
0V
5.25V
-4.75V
-0.2V
0.1V
2.0V
VCC
DGND1 1V
-4.30V -4.16V -4.00V
-3mA
-0.4mA
10ns
10ns
-
-
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. See Figure 6 in the Timing Diagram.
2. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
TA = 25oC, VCC = DGND2 = AGND1 = AGND2 = 5V, DGND1 = VEE = 0V, VSET = 0.84V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SINGLE POWER SUPPLY
Resolution, n
Maximum Conversion Speed, fMAX
RL > 10kΩ, CL < 20pF
Linearity Error, EL
RL > 10kΩ
Differential Linearity Error, ED
Full Scale Output Voltage, VFS
RL > 10kΩ
Offset Voltage (Note 2), VOS
RL > 10kΩ
Output Resistance, RO
Power Supply Current, ICC
RL > 10kΩ, IREF = -400µA
-
8
-
Bit
35
-
-
MHz
-0.5
-
0.5
LSB
-0.5
-
0.5
LSB
0.9
1.0
1.1
V
0
4
10
mV
290
350
410
Ω
32
40
48
mA
Digital Input Current
H Level, IIH
0
-
5
µA
L Level, IIL
-400
-
0
µA
-3
-
0
µA
VSET Input Current, ISET
Internal Reference Output Voltage, VREF
IREF = -400µA
1.17
1.25
1.33
V
Accuracy Output Voltage Range, VOC
RL > 10kΩ
0.5
1.0
1.50
V
10
-
-
ns
2
-
-
ns
Set-Up Time, tS
Hold Time, tH
Propagation Delay Time, tPD
RL > 10kΩ
-
11
-
ns
Glitch Energy, GE
RL > 10kΩ,
fCLK = 1MHz, Digital Lamp Output
-
30
-
pV/s
NOTE:
3. V OS = AGND2 - V255 (V255 is the output voltage when full input is at high level).
10-4
HI1106
Electrical Specifications
TA = 25oC, VCC = 5V, DGND1 = DGND2 = AGND1 = AGND2 = 0V, VEE = -5V, VSET - VEE = 0.84V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
-
8
-
Bit
35
-
-
MHz
-0.5
-
0.5
LSB
-0.5
-
0.5
LSB
DUAL POWER SUPPLY
Resolution, n
Maximum Conversion Speed, fMAX
RL > 10kΩ, CL < 20pF
Linearity Error, EL
RL > 10kΩ
Differential Linearity Error, DNL
Full Scale Output Voltage, VFS
RL > 10kΩ
0.9
1.0
1.1
V
Offset Voltage, VOS
RL > 10kΩ
0
4
10
mV
290
350
410
Ω
24
30
36
mA
40
50
60
mA
H Level, IIH
0
-
5
µA
L Level, IIL
-400
-
0
µA
-3
-
0
µA
-3.83
-3.75
-3.67
V
0.5
1.0
1.50
V
10
-
-
ns
2
-
-
ns
Output Resistance, RO
Power Supply Current
RL > 10kΩ, IREF = -400µA
ICC
IEE
Digital Input Current
VSET Input Current, ISET
Internal Reference Output Voltage, VREF
IREF = -400µA
Accuracy Output Voltage Range, VOC
RL > 10kΩ
Set-Up Time, tS
Hold Time, tH
Propagation Delay Time, tPD
RL > 10kΩ
-
11
-
ns
Glitch Energy, GE
RL > 10kΩ,
fCLK = 1MHz Digital Lamp Output
-
30
-
pV/s
INPUT/OUTPUT CODE TABLE
(When Output Full Scale Voltage at 1.00V)
INPUT CODE
MSB
LSB
OUTPUT VOLTAGE
(SINGLE SUPPLY)
OUTPUT VOLTAGE
(DUAL SUPPLY)
1
1
1
1
1
1
1
1
VCC
-0V
1
0
0
0
0
0
0
0
V CC -0.5V
-0.5V
0
0
0
0
0
0
0
0
VCC -1V
-1V
10-5
HI1106
Test Circuits
(MSB)
D7
D6
D5
1
10
24
12
23
15
VREF
VSET
3K
0.47µ
VEE
V
HI1106
2
(LSB)
D0
VCC
DGND1
CLK TTL LEVEL
SINGLE POWER SUPPLY
CLK
20
3
AGND1
AGND2
6
V
7
4
9
5
AOUT
DGND2
DUAL POWER SUPPLY
DVCC AVCC DGND AGND VEE
FIGURE 1. DC CHARACTERISTICS
(MSB)
D7
D6
D5
8-BIT
COUNTER
(TTL LATCH
OUTPUT)
1
10
24
12
23
15
HI1106
(LSB)
D0
VCC
DGND1
CLK
2
3
20
VREF
VSET
0.47µ
VEE
AGND1
AGND2
6
7
4
9
5
3K
V
AOUT
DIGITAL LAMP
WAVEFORM
OCCURRENCE
OSCILLOSCOPE
RIN = 1MΩ
CIN = 10pF
BW = 20MHz
DGND2
CLK 35MHz
TTL LEVEL
SQUARE
WAVEFORM
CLK
SINGLE POWER SUPPLY
DUAL POWER SUPPLY
2ns TO 14ns
DATA
DVCC AVCC DGND AGND VEE
TIMING BETWEEN CLK AND DATA
FIGURE 2. MAXIMUM CONVERSION SPEED
10-6
HI1106
Test Circuits
(Continued)
(MSB)
D7
D6
D5
8-BIT
COUNTER
(TTL LATCH
OUTPUT)
1
10
24
12
23
15
HI1106
(LSB)
D0
VCC
PULSE
GENERATOR
1MHz TTL
DGND1
CLK
2
3
20
VREF
VSET
4
9
5
V
AGND1
AGND2
6
7
3K
0.47µ
VEE
AOUT
DIGITAL LAMP
WAVEFORM
OCCURRENCE
OSCILLOSCOPE
RIN = 1MΩ
CIN = 20pF
BW = 5MHz
DGND2
DELAY
CONTROLLING
PULSE
GENERATOR
1MHz TTL
FET PROBE
FET PROBE
SINGLE POWER SUPPLY
DUAL POWER SUPPLY
OSCILLOSCOPE
RIN = 50Ω
CIN = 10pF
BW = 200MHz
DVCC AVCC DGND AGND VEE
FIGURE 3. SET-UP TIME AND HOLD TIME
10-7
HI1106
Test Circuits
(Continued)
(MSB)
D7
D6
D5
8-BIT
COUNTER
(TTL LATCH
OUTPUT)
1
10
24
12
23
15
HI1106
(LSB)
D0
VCC
DGND1
CLK
2
3
20
VREF
VSET
0.47µ
VEE
AGND1
AGND2
6
7
4
9
5
3K
V
AOUT
DGND2
CLK 1MHz
TTL LEVEL
SQUARE
WAVEFORM
DIGITAL LAMP
WAVEFORM
OCCURRENCE
OSCILLOSCOPE
RIN = 1MΩ
CIN = 10pF
BW =5MHz
CLK
SINGLE POWER SUPPLY
DUAL POWER SUPPLY
2ns TO 90ns
DATA
DVCC AVCC DGND AGND VEE
TIMING BETWEEN CLK AND DATA
FIGURE 4. GLITCH AREA
10-8
HI1106
Test Circuits
(Continued)
D7
D6
D5
1/ DIVIDER
2
1
10
24
12
23
15
HI1106
D0
VCC
DGND1
CLK
20
2
3
VREF
VSET
0.47µ
VEE
AGND1
AGND2
6
7
5
9
4
DGND2
AOUT
FET PROBE
CLK 10MHz
TTL LEVEL
SQUARE
WAVEFORM
SINGLE POWER SUPPLY
3K
V
FET PROBE
OSCILLOSCOPE
RIN = 50Ω
CIN = 10pF
BW = 200MHz
CLK
DUAL POWER SUPPLY
2ns TO 90ns
DATA
DVCC AVCC DGND AGND VEE
TIMING BETWEEN CLK AND DATA
FIGURE 5. PROPAGATION DELAY TIME
10-9
HI1106
Timing Diagram
tPW1
tPW0
VTH = 1.5V
CLK
tS
tS
tS
tH
tH
tH
DATA
VTH = 1.5V
tPD
100%
D/AOUT
50%
tPD
tPD
0%
FIGURE 6.
Typical Performance Curves
TA = 25oC
VCC = DGND2 = AGND1
= AGND2 = 5V
DGND1 = VEE = 0
2.0
VFS (V)
VFS (V)
2.0
RL = 330Ω
1.0
0
TA = 25 oC
VCC = 5V
DGND1 = DGND2
= AGND1 = AGND2 = 0
VEE = -5V
RL > 10kΩ
1.0
VSET (V)
2.0
RL = 330Ω
1.0
0
FIGURE 7. FULL-SCALE OUTPUT VOLTAGE (VFS) vs VSET
(SINGLE POWER SUPPLY)
RL > 10kΩ
1.0
VSET - VEE (V)
FIGURE 8. FULL-SCALE OUTPUT VOLTAGE (VFS) vs
VSET - VEE (DUAL POWER SUPPLY)
10-10
2.0
HI1106
Typical Performance Curves
(Continued)
1.02
TA - VFS / VFS (25oC)
TA - VFS / VFS (25oC)
1.02
1.00
0.98
VSET = 0.84V
IREF = -400µA
VCC = DGND2 = AGND1
0.96
= AGND2 = 5V
DGND1 = VEE = 0
RL ≥ 10kΩ
-20
0
1.00
0.98
0.96
20
40
60
80
-20
TA , AMBIENT TEMPERATURE (oC)
2.5
2.5
2.0
2.0
VOS (mV)
VOS (mV)
3.0
-20
VSET = 0.84V
IREF = -400µA
VCC = DGND2 = AGND1
= AGND2 = 5V
DGND1 = VEE = 0V
RL ≥ 10kΩ
0
20
40
60
1.5
1.0
80
-20
TA , AMBIENT TEMPERATURE (oC)
FIGURE 11. OUTPUT OFFSET VOLTAGE (VOS) vs
TEMPERATURE (SINGLE POWER SUPPLY)
20
40
60
80
FIGURE 10. FULL-SCALE OUTPUT VOLTAGE (VFS) vs
TEMPERATURE (DUAL POWER SUPPLY)
3.0
1.0
0
TA , AMBIENT TEMPERATURE (oC)
FIGURE 9. FULL-SCALE OUTPUT VOLTAGE (VFS) vs
TEMPERATURE (SINGLE POWER SUPPLY)
1.5
VSET - VEE = 0.84V
IREF = -400µA
VCC = 5V
DGND1 = DGND2 = AGND1
= AGND2 = 0V
VEE = -5V
RL ≥ 10kΩ
VSET - VEE = 0.84V
IREF = -400µA
VCC = 5V
DGND1 = DGND2 = AGND1
= AGND2 = 0V
VEE = -5V
RL ≥ 10kΩ
0
20
40
60
TA , AMBIENT TEMPERATURE (oC)
FIGURE 12. OUTPUT OFFSET VOLTAGE (VOS) vs
TEMPERATURE (DUAL POWER SUPPLY)
10-11
80
HI1106
Typical Performance Curves
IREF = -400µA
VCC = 5V
IREF = -400µA
VCC = DGND2 = AGND1
AGND2 = 5V
DGND1 = VEE = 0V
1.260
1.250
VREF (V)
VREF (V)
1.260
(Continued)
1.240
1.230
DGND1 = DGND2 = AGND1
= AGND2 = 0V
VEE = -5V
1.250
1.240
1.230
-20
0
20
40
60
80
-20
0
TA , AMBIENT TEMPERATURE (oC)
40
60
80
TA , AMBIENT TEMPERATURE (oC)
FIGURE 13. INTERNAL REFERENCE VOLTAGE (V REF) vs
TEMPERATURE (SINGLE POWER SUPPLY)
FIGURE 14. INTERNAL REFERENCE VOLTAGE (V REF) vs
TEMPERATURE (DUAL POWER SUPPLY)
VCC = DGND2 = AGND1
= AGND2 = 5V
DGND1 = VEE = 0V
VCC = 5V
DGND1 = DGND2 = AGND1
= AGND2 = 0V
VEE = -5V
2.0
VTH (V)
VTH (V)
2.0
20
1.0
1.5
-20
0
20
40
60
80
-20
0
20
40
60
80
TA , AMBIENT TEMPERATURE (oC)
TA , AMBIENT TEMPERATURE (oC)
FIGURE 15. THRESHOLD VOLTAGE (VTH) OF DIGITAL INPUT
vs TEMPERATURE (SINGLE POWER SUPPLY)
FIGURE 16. THRESHOLD VOLTAGE (VTH) OF DIGITAL INPUT
vs TEMPERATURE (DUAL POWER SUPPLY)
1.050
1.000
VFS (V)
VOS (V)
3
TA = 25 oC
VSET = 0.84V
VCC = DGND2 = AGND1
2
= AGND2
DGND1 = VEE = 0V
RL ≥ 10kΩ
1
4.5
5.0
VCC (V)
0.950
0.900
0.850
4.5
5.5
FIGURE 17. OUTPUT OFFSET VOLTAGE (VOS) vs SUPPLY
VOLTAGE (SINGLE POWER SUPPLY)
TA = 25oC
VSET = 0.84V
VCC = DGND2 = AGND1
= AGND2
DGND1 = VEE = 0V
RL ≥ 10kΩ
5.0
VCC (V)
5.5
FIGURE 18. OUTPUT FULL-SCALE VOLTAGE (V FS) vs SUPPLY
VOLTAGE (DUAL POWER SUPPLY)
10-12
Typical Performance Curves
VFS (V)
1.260
(Continued)
TA = 25 oC
I REF = -400µA
VCC = DGND2 = AGND1
= AGND2
DGND1 = VEE = 0V
1.250
1.240
1.230
4.5
5.0
5.5
VCC (V)
FIGURE 19. INTERNAL REFERENCE VOLTAGE (VREF) vs SUPPLY
VOLTAGE (SINGLE POWER SUPPLY)
Application Circuits
13
8-BIT
DIGITAL
INPUT
(TTL)
D5
D4
D3
D2
D1
D0
NC
NC
VEE
VSET
12
D6
16
D7
11 (MSB)
10
CLK
9
17
8
18
7
19
6
20
5
21
4
22
3
23
2
24
1
14
15
CLK (TTL)
DGND1
VCC
DGND2
-
AOUT
AGND2
AGND1
VREF
3K
FIGURE 20. SINGLE POWER SUPPLY
10-13
+
R†
†
LPF
D/AOUT
MATCHING RESISTANCE FOR LPF
Application Circuits
13
8-BIT
DIGITAL
INPUT
(TTL)
D3
D2
D1
NC
NC
VEE
VSET
16
17
8
18
7
19
6
20
5
21
4
22
3
15
D4
D6
D7
11 (MSB)
10
CLK
9
14
D5
D0 (LSB)
12
23
2
24
1
CLK (TTL)
DGND1
VCC
DGND2
-
AOUT
AGND2
AGND1
R
†
LPF
+
†
D/A OUT
MATCHING RESISTANCE FOR LPF
VREF
3K
DVCC AVCC DGND AGND
VEE
FIGURE 21. DUAL POWER SUPPLY
Notes On Application
1. Setting of VREF Pin (Pin 24)
The full-scale voltage of the D/A output is determined by
VSET input voltage. As about (1.2V - VEE) DC voltage is
generated at VREF pin (Pin 1) by connecting an external
resistor from VREF pin to VEE pin (Pin 23), divide this voltage using resistors and apply it to VSET pin as Figure 22.
Example of usage:
1
24
23
VREF
IREF
VSET
VEE
R
VSET
3. D/A Output Pin Load
Receive the D/A output stage at high impedance, so as to
obtain:
RL > 10kΩ,
CL < 20pF.
SINGLE POWER SUPPLY
AGND
DUAL POWER SUPPLY
2. Phase Relation Between Data and Clock
To make the best use of the inherent characteristics of
this D/A converter the phase relation between the data
and clock applied from the exterior, should be properly
set. Set up time (tS) and Hold time (tH ) should be as indicated in the Electrical Specifications. For tS and tH refer
to Figure 6 in the Timing Waveform. Also, set the clock
pulse width according to the Recommended Operating
Conditions.
4. Noise Reduction
Refer to the following notes in order to minimize noise
contamination that occurs from outside the IC and
penatrates D/A output.
VEE
FIGURE 22.
The full-scale voltage of the D/A output can be determined
from the following equation:
VFS = 1.2 (VSET - VEE) (RL > 10kΩ, 0.4V ≤ VSET ≤ 1.2V
Select an external resistor R (connected to VREF pin) so
that IREF (current of an external resistor) is within the value
indicated as the Recommended Operating Conditions of
(-3mA < IREF < -0.4mA).
10-14
• The power supply line and ground line should be made
as wide as possible when fixed to the printed circuit
board. Analog and Digital circuits should be separated.
• Connected a bypass capacitor between each of DVCC
(Pin 6) and DGND1 (Pin 7); AGND1, 2 (Pins 2, 3) and
VEE (Pin 23); VSET (Pin 24) and V EE (Pin 23),
respectively.