DAC-HK12BGC Datasheet, PDF (1/4 Pages) Murata Power Solutions Inc. – High-Performance, 12-Bit DAC’s with Input Registers

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INNOVATION and EXCELLENCE
FEATURES
• 12-Bit resolution
• Integral nonlinearity error ±1/2LSB, max.
• Differential nonlinearity error ±3/4LSB, max.
• MIL-STD-883 high-reliability versions available
• Input register
• 3µs fast settling time
• Guaranteed monotonicity over full temperature range
GENERAL DESCRIPTION
The DAC-HK Series hybrid D/A converters are high-
performance 12-bit devices with a fast settling voltage output.
They incorporate a level-controlled input storage register and
are specifically designed for systems applications such as data
bus interfacing with computers. When the “load” input is high,
data in the storage register is held, and when the load input is
low, data is transferred through to the DAC. There are two
basic models available by coding option: binary and two’s
complement. The output voltage ranges are externally pin-
programmable and include: 0 to +5V, 0 to +10V, ±2.5V, ±5V
and ±10V.
The DAC-HK Series contains a precision 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 a differential
nonlinearity tempco of ±2ppm/°C maximum. The temperature
coefficient of gain is ±20ppm/°C maximum, and the tempco of
zero is ±5ppm/°C maximum.
DAC-HK Series
High-Performance, 12-Bit
DAC’s with Input Registers
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 1 (MSB)
2 BIT 2
3 BIT 3
4 BIT 4
5 BIT 5
6 BIT 6
7 BIT 7
8 BIT 8
9 BIT 9
10 BIT 10
11 BIT 11
12 BIT 12 (LSB)
24 REFERENCE OUT
23 GAIN ADJUST
22 +15V SUPPLY
21 GROUND
20 SUMMING JUNCTION
19 20V RANGE
18 10V RANGE
17 BIPOLAR OFFSET
16 LOAD
15 VOLTAGE OUTPUT
14 –15V SUPPLY
13 +5V SUPPLY
REF.
OUT
24
GAIN
ADJUST
23
BIPOLAR +15V
–15V
+5V
OFFSET SUPPLY SUPPLY SUPPLY
17
22
14
13
+5V
D/A CONVERTER
19 20V RANGE
5kΩ
5kΩ
18 10V RANGE
LOAD 16
REGISTER
74LS75
REGISTER
74LS75
REGISTER
74LS75
20
SUMMING
JUNCTION
15
VOLTAGE
OUTPUT
21 GROUND
1234
BITS 1 2 3 4
5678
5678
MSB
DIGITAL INPUTS
9 10 11 12
9 10 11 12
LSB
Figure 1. Functional Block Diagram