鈥?/div>
16-Bit resolution
3 Output voltage ranges
鹵15ppm/擄C maximum gain tempco
Integral nonlinearity error 鹵0.003%FSR, max.
14 Bits monotonic from +10擄C to +40擄C
High-reliability MIL-STD鈥?83 models available
GENERAL DESCRIPTION
The DAC-HP Series are high-resolution hybrid digital-to-analog
converters with voltage outputs. The Series has 16-bit binary
resolution with 鹵0.003% integral nonlinearity. These units are
self-contained, including a low-tempco Zener reference circuit
and an output amplifier, in a miniature 24-pin DDIP package.
The DAC-HP Series offers both unipolar and bipolar modes
with outputs of 0 to +10V and 鹵5V respectively. Devices with a
bipolar output range of 鹵10V are also available and are
designated with a "-1" suffix after the model designation. Input
coding is complementary binary and complementary offset
binary.
The DAC-HP design incorporates thin and thick-film hybrid
technology. The design also includes an on-board amplifier
and a precision Zener reference circuit. This eliminates code
dependent ground currents by routing currents 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 stability and performance. The
excellent tracking of the resistors results in tempcos for
differential nonlinearity, gain and zero of 鹵2, 鹵15 and
鹵5ppm/擄C max., 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
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
REFERENCE OUT
+15V SUPPLY
GAIN ADJUST
SUMMING JUNCTION
GROUND
鈥?5V SUPPLY
BIPOLAR OFFSET
OUTPUT
BIT 16 (LSB)
BIT 15
BIT 14
BIT 13
The DAC-HP Series operates off of 鹵15V supplies and offers
models with temperature performance covering the 0 to +70擄C
commercial or 鈥?5 to +125擄C military temperature ranges.
High reliability MIL-STD-883 versions are also available.
BIPOLAR
OFFSET
18
+15V
SUPPLY
23
GROUND
20
鈥?5V
SUPPLY
19
6.4k
鈩?/div>
REFERENCE 24
OUT
6.4V
REFERENCE
17 OUTPUT
5k
鈩?/div>
5k
鈩?/div>
21
SUMMING
JUNCTION
GAIN
22
ADJUST
REFERENCE
CONTROL
CIRCUIT
16-BIT
D/A CONVERTER
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
BITS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
MSB
DIGITAL INPUTS
LSB
Figure 1. Functional Block Diagram
1
2
3
4
