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DAC-12100LC Datenblatt(PDF) 4 Page - DATEL, Inc.

Teilenummer DAC-12100LC
Bauteilbeschribung  12-Bit, 100MHz, Low-Power D/A Converters
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Hersteller  DATEL [DATEL, Inc.]
Direct Link  http://www.datel.com/
Logo DATEL - DATEL, Inc.

DAC-12100LC Datenblatt(HTML) 4 Page - DATEL, Inc.

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DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
DAC-12100
12-Bit, 100MHz, Low-Power D/A Converters
26 Jun 2015 MDA_DAC-12100.B03 Page 4 of 7
POWER SUPPLIES
REFERENCE
In order to reduce power supply noise separate –5.2V analog and digital
power supplies should be used. The power supply lines should be
bypassed with 0.1μF and 0.01μF ceramic capacitors placed as close to the
–5.2V analog pins (15, 25) and digital pins (12, 21) as possible. The analog
and digital power supply ground returns should be connected at one point
as close to the power source as possible. The +5V supply pin (23) should
be bypassed with a 0.1μF ceramic capacitor connected as close to the pin
as possible. See Figure 2.
Figure 2. Typical Connection Diagram
The internal reference is a –1.23V, typical, bandgap voltage reference. The
internal reference is connected to Reference OUT (REF OUT, pin 20) and the
internal control Amplifier (CTRL IN, pin 19). The control Amplifier OUT (CTRL
OUT, pin 18) should be connected to Reference IN (REF IN, pin17) and to
–5.2V (pin 15) Analog Supply through a 0.1μF and a 0.01uF ceramic capac-
itor (as shown in figure 2) in order to improve the settling time This reduces
switching noise and improves output settling time. The Full Scale Output
Current, IOUT (pin 14) and IOUT (pin 16), is controlled by the REF OUT (pin 20)
voltage and the RSET (pin 24) resistor through the following equation:
Full Scale IOUT = (REF OUT Voltage/RSET Resistance) x 16
The internal reference (REF OUT) may be overdriven with a more precise
external reference, capable of delivering up to 2mA, to provide better over
temperature performance.
(17) REF IN
(18) CTRL OUT
(20) REF OUT
(28)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(13) AGND
(15, 25) –5.2 V (A)
–5.2 V (D) (12, 21)
DATA CLOCK (26)
DGND (27)
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)
+5V (D) (23)
+5V (D)
DAC-12100
–5.2V (A)
D/A OUT
976
-5.2V (A)
(14) IOUT
(16) IOUT
–5.2V (D)
Ω
Ω
Ω
0.1μF
0.01μF
0.1μF
0.01μF
0.01μF
0.1μF
50
Ω
RSET
(24)
0.1μF
50
50
(19) CTRL IN
REF GND
(22)


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