DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ
PC667
10-BIT D/A CONVERTER
The
µ
PC667 is high-speed and high-precision 10-bit D/A converter.
Clock rate of the
µ
PC667 is 60 Msps. Conversion precision of the
µ
PC667 is
±1.0
LSB.
FEATURES
• Resolution
• Clock rate
• Technology
• Power supply
• D/A conversion method
• Analog output form
10-bit
60 Msps
Bi-CMOS
+5 V
R-2R ladder resistance and segment summing system
Voltage output type
• Built-in reference voltage generating circuit
ORDERING INFORMATION
Part Number
Package
30-pin plastic shrink DIP (400 mil)
µ
PC667CT
The information in this document is subject to change without notice.
Document No. S11099EJ2V0DS00 (2nd edition)
(Previous No. IC-3250)
Date Published February 1996 P
Printed in Japan
The mark
5
shows major revised points.
©
1993, 1996
µ
PC667
BLOCK DIAGRAM
CLK
10
D1 to D10
Input buffer
Master-slave
F.F.
Current switch
R-2R ladder
A
OUT
Reference
voltage
generator
Amp.
Reference
current source
Reference
resistor
V
RSET
V
ROUT
V
REF
COMP AV
CC
DV
CC
AGND DGND
2
µ
PC667
PIN CONFIGURATION
(Top View)
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
DGND
CLK
NC
DGND
NC
1
2
3
4
5
6
30
29
28
27
26
25
DV
CC
AGND
AV
CC
COMP
A
OUT
V
REF
AV
CC
AGND
DGND
V
ROUT
V
RSET
NC
NC
NC
NC
µ
PC667CT
7
8
9
10
11
12
13
14
15
24
23
22
21
20
19
18
17
16
AGND
A
OUT
AV
CC
CLK
COMP
DGND
DV
CC
NC
V
REF
V
ROUT
V
RSET
: Ground for Analog Circuit
: Analog Output
: Power Supply for Analog Circuit
: Clock
: Phase Compensation
: Ground for Digital Circuit
: Power Supply for Digital Circuit
: No Connection
: Reference Voltage
: Reference Voltage Output
: Reference Voltage Adjustment
D1 to D10 : Digital Signal
3
µ
PC667
PIN FUNCTIONS
Input/
Output
Input
Pin Name
D1 to D10
Pin No.
1 to 10
Function
Digital signal
D1 is MSB, D10 is LSB.
Equivalent Circuit
DV
CC
DV
CC
500
Ω
DGND
DGND
CLK
12
Input
Clock
The rising edge of signal input to
this pin triggers analog output.
DV
CC
DV
CC
500
Ω
DGND
DGND
DV
CC
30
—
Power supply for digital circuit
DV
CC
DGND
11, 14, 22
—
Ground for digital circuit
DGND
V
RSET
20
—
Reference voltage adjustment
Voltage adjusting pin for the
incorporated reference voltage
generating circuit. The output
voltage of V
ROUT
pin varies according
to the voltage applied to this pin.
When no adjustment is necessary,
connect approx. 0.1
µ
F capacitance
between this pin and GND pin.
V
ROUT
21
Output
Reference voltage output
Voltage output pin of the incorpo-
rated reference voltage generating
circuit. This pin has high output
impedance, and must be connected
with a high impedance element.
V
ROUT
AV
CC
AV
CC
7.5 kΩ
3 kΩ
AV
CC
2 kΩ
V
RSET
AGND
Reference
voltage
generator
AGND
4
µ
PC667
Input/
Output
Input
Pin Name
V
REF
Pin No.
25
Function
Reference voltage
The output full-scale range is set
according to the voltage applied to
this pin. Apply standard 4.0 V.
When no adjustment is necessary,
connect the output from V
ROUT
pin
directly to this pin.
Equivalent Circuit
AV
CC
5 kΩ
20
µ
A
AGND
AGND
A
OUT
26
Output
Analog signal
Analog signal output pin.
AV
CC
AV
CC
112.5
Ω
112.5
Ω
AGND
225
Ω
112.5
Ω
R-2R
Ladder
resistance
AGND AGND
COMP
27
—
Phase compensation
Phase compensating capacitor
connection pin for full-scale ampli-
fier. Approx. 0.1
µ
F capacitor must
be connected between this pin and
AV
CC
pin.
AV
CC
AV
CC
9.7 kΩ
AGND
AV
CC
9.7 kΩ
AV
CC
COMP
AGND
AGND
AV
CC
24, 28
—
Power supply for analog circuit
AV
CC
AGND
23, 29
—
Ground for analog circuit
AGND
NC
13, 15 to 19
—
No Connection
5
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