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High-reliability QL versions available
GENERAL DESCRIPTION
The DAC-HZ Series are high-performance, monolithic, 12-bit
binary and 3-digit BCD, digital-to-analog converters. The
DAC-HZ Series are complete and self-contained with a
precision internal reference and fast output operational
amplifier. Pin programmable output voltage and current
ranges are provided for a high degree of application flexibility;
the binary versions offer 5 output voltage ranges and two
current ranges while the BCD models offer 3 and 1 output
ranges, respectively.
The DAC-HZ Series contains a precision embedded Zener
reference circuit. This eliminates code-dependent ground
currents by routing current from the positive supply to the
internal ground node as determined by the R-2R ladder
network. The internal feedback resistors for the on-board
amplifier track the ladder network resistors, enhancing
temperature performance. The excellent tracking of the
resistors results in temperature coefficients for differential
nonlinearity, zero and gain of 鹵2, 鹵3 and 鹵20ppm/擄C
maximum, respectively.
INPUT/OUTPUT CONNECTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
FUNCTION
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
REFERENCE OUT
GAIN ADJUST
+15V SUPPLY
GROUND
CURRENT OUTPUT
20V RANGE
10V RANGE
BIPOLAR OFFSET
REFERENCE IN
VOLTAGE OUTPUT
鈥?5V SUPPLY
NO CONNECTION
1
2
4
8
10
20
40
80
100
200
400
800
BITS BCD
BITS BINARY
MSB 1 2 3 4 5 6 7 8 9 10 11 12 LSB
1 2 3 4 5 6 7 8 9 10 11 12
5kW
19 20V RANGE
(4kW , BCD)
5kW
D/A CONVERTER
(4kW , BCD)
18 10V RANGE
REFERENCE IN 16
6.3k
W
*
BIPOLAR OFFSET 17
*
FOR BCD MODELS,
THIS RESISTOR IS
OPEN CIRCUIT.
20 CURRENT OUTPUT
15 VOLTAGE OUTPUT
GAIN ADJUST 23
+6.3V
REFERENCE
21 GROUND
REFERENCE OUT 24
22
+15V
SUPPLY
14
鈥?5V
SUPPLY
13
NO INTERNAL
CONNECTION
Figure 1. Functional Block Diagram
1
2
3
4
