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DAC-HF8BMC Datasheet(PDF) 2 Page - Murata Power Solutions Inc.

No. de pieza DAC-HF8BMC
Descripción Electrónicos  Ultra-Fast, 8/10/12-Bit Digital-to-Analog Converters
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Fabricante Electrónico  MURATA-PS [Murata Power Solutions Inc.]
Página de inicio  http://www.murata-ps.com
Logo MURATA-PS - Murata Power Solutions Inc.

DAC-HF8BMC Datasheet(HTML) 2 Page - Murata Power Solutions Inc.

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DAC-HF Series
®
®
DESCRIPTION
8B
10B
12B
INPUTS
Resolution,
Bits
8
10
12
Coding,
Unipolar Output
Straight binary
Coding,
Bipolar Output
Offset binary
Input Logic Level,
Bit ON ("1")
+2.0V to +5.5V at +40μA
Input Logic Level,
Bit OFF ("0")
0V to +0.8V at –2.6mA
PERFORMANCE
Nonlinearity Error,
max.
±0.012%
TMIN to TMAX
±0.024%
Differential Nonlinearity Error,
max.
±0.012%
TMIN to TMAX
±0.024%
Monotonicity
Guaranteed over oper. temp. range
Gain Tempco,
max.
±20ppm/°C
Offset Tempco,
Bipolar, max.
±10ppm/°C of FSR ➁
Zero Tempco,
max.
±1.5ppm/°C of FSR ➁
Settling Time,
ns max. ➂
25
25
50
Power Supply Sensitivity
±0.01%/% Supply
OUTPUTS
Output Current Range,
Unipolar
0 to +5mA
Output Current Range,
Bipolar
±2.5mA
Output Compliance Voltage
±1.2V
Output Voltage Ranges ➀
0 to –5V
0 to –10V
±2.5V
±5V
±10V
Output Resistance
400 Ohms ±10%
Output Capacitance
15pF
Output Leakage Current,
All Bits OFF
15nA
POWER REQUIREMENTS
Supply Voltages
±15V ±0.5V
Positive Quiescent Current,
max.
40mA
45mA
50mA
Negative Quiescent Current,
max.
17mA
17mA
17mA
PHYSICAL ENVIRONMENTAL
Operating Temperature Range,
Case
0°C to +70°C (BMC)
–55°C to +125°C (BMM, 883)
Storage Temperature Range
–65°C to +150°C
Package Type
24-pin ceramic DDIP
Weight
0.22 ounces (6.3 grams)
TECHNICAL NOTES
1. Proper operation of the DAC-HF Series converters is
dependent on good board layout and connection practices.
Bypass supplies as shown in the connection diagrams.
Mount bypass capacitors close to the converter, directly to
the supply pins where possible.
2. Use of a ground plane is particularly important in high-
speed D/A converters as it reduces high-frequency noise
and aids in decoupling the digital inputs from the analog
output. Avoid ground loop problems by connecting all
grounds on the board to the ground plane. The remainder
of the ground plane should include as much of the circuit
board as possible.
3. When the converter is configured for voltage output with an
external operational amplifier, keep the leads from the
converter to the output amplifier as short as possible.
4. The high-speed current switching technique used in the
DAC-HF Series inherently reduces the amplitude and
duration of large transient spikes at the output (“glitches”).
The most severe glitches occur at half-scale, the major
carry transition from 011 … 1 to 100 … 0 or vice versa. At
this time, a skewing of the input codes can create a
transition state code of 111 … 1. The duration of the
“transition state code” is dependent on the degree of
skewing, but its effect is dependent on the speed of the
DAC (an ultra-fast DAC will respond to these brief
spurious inputs to a greater degree than a slow DAC).
Minimize the effects of input skewing by using a high-
speed input register to match input switching times. The
input register recommended for use with the DAC-HF is
easily implemented with two Texas Instruments
SN74S174 hex D-type flip-flops. This register will reduce
glitches to a very low level and ensure fast output settling
times.
5. Test the DAC-HF using a low-capacitance test probe (such
as a 10X probe). Take care to assure the shortest
possible connection between probe ground and circuit
ground. Long probe ground leads may pick up
environmental E.M.I. causing artifacts on the scope
display, i.e., signals that do not originate at the unit under
test.
6. Passive components used with the DAC-HF may be as
indicated here: 0.1μF and 1μF bypass capacitors should
be ceramic type and tantalum type respectively; the 400Ω
output load is a ±0.1%, 10ppm/°C, metal-film type;
adjustment potentiometers are ceremet types; other
resistors may be ±10% carbon composition types.
7. Output voltage compliance is ±1.2V to preserve the
linearity of the converter. In the bipolar mode, the DAC-HF
can be operated with no load to give an output voltage of
±1.0V. In the unipolar mode, the load resistance must be
less than 600Ω to give less than +1.2V output. The
specified output currents of 0 to +5mA and ±2.5mA are
measured into a short circuit or an operational amplifier
summing junction.
ABSOLUTE MAXIMUM RATINGS, ALL MODELS
FUNCTIONAL SPECIFICATIONS
(Typical at +25°C and ±15V supplies unless otherwise noted.)
Positive Supply, Pin 24
+18V
Negative Supply, Pin 22
–18V
Digital Input Voltage, Pins 1–12
+15V
Lead Temperature (soldering, 10s)
300°C
Footnotes
With external operational amplifier.
FSR is Full Scale Range, or the difference between minimum
and maximum output values.
Full-scale current change to ±1LSB with 400Ω load.


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