參數(shù)資料
型號(hào): DAC8562FRUZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 5/16頁(yè)
文件大?。?/td> 0K
描述: IC DAC 12BIT PARALLEL 5V 20TSSOP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 1
設(shè)置時(shí)間: 16µs
位數(shù): 12
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
功率耗散(最大): 30mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 管件
輸出數(shù)目和類型: 1 電壓,單極;1 電壓,雙極
采樣率(每秒): 62.5k
DAC8562
REV. A
–13–
To compensate for the SSM2018’s gain constant temperature
coefficient of –3300 ppm/
°C, a 1 k, temperature-sensitive
resistor (R7) manufactured by the Precision Resistor Com-
pany with a temperature coefficient of +3500 ppm/
°C is used.
A CCON of 1
F provides a control transition time of 1 ms which
yields a click-free change in the audio channel attenuation. Sym-
metry and offset trimming details of the VCA can be found in
the SSM2018 data sheet.
Information regarding the PT146 1 k
“Compensator” can be
obtained by contacting:
Precision Resistor Company, Incorporated
10601 75th Street North
Largo, FL 34647
(813) 541-5771
A High-Compliance, Digitally Controlled Precision Current
Source
The circuit in Figure 38 shows the DAC8562 controlling a
high-compliance, precision current source using an AMP05 in-
strumentation amplifier. The AMP05’s reference pin becomes
the input, and the “old” inputs now monitor the voltage across a
precision current sense resistor, RCS. Voltage gain is set to unity,
so the transfer function is given by the following equation:
I
OUT =
V
IN
R
CS
If RCS equals 100
, the output current is limited to +10 mA
with a 1 V input. Therefore, each DAC LSB corresponds to
2.4
A. If a bipolar output current is required, then the circuit
in Figure 33 can be modified to drive the AMP05’s reference
pin with a
±1 V input signal.
Potentiometer P1 trims the output current to zero with the in-
put at 0 V. Fine gain adjustment can be accomplished by adjust-
ing R1 or R2.
A Digitally Programmable Window Detector
A digitally programmable, upper/lower limit detector using two
DAC8562s is shown in Figure 39. The required upper and
lower limits for the test are loaded into each DAC individually
by controlling HDAC/LDAC. If a signal at the test input is not
within the programmed limits, the output will indicate a logic
zero which will turn the red LED on.
9
18
1
2
17
R1
100k
7
6
R2
5k
P1
100k
5
4
11
0.1F
–15V
AMP-05
10
RCS
100
0mA
I
OUT 10mA
2.4A/ LSB
12
0.1F
+15V
15
DGND
AGND
DATA
DAC-8562
13
+15V
10
16
CE
CLR
20
12
0.1F
4
REF-02
6
2
0.1F
R3
3k
R4
1k
8
Figure 38. A High-Compliance, Digitally Controlled
Precision Current Source
15
16
DGND AGND
DAC-8562
13
10
12
0.1F
20
+5V
2
1
1/6
74HC05
HDAC/LDAC
CLR
+5V
1k
C1
C2
0.1F
+5V
12
3
2
1
4
6
7
5
+5V
R1
604
RED LED
T1
3
4
+5V
R2
604
GREEN LED
T1
PASS/FAIL
C1, C2 = 1/4 CMP-404
15
16
DGND AGND
DAC-8562
13
10
12
0.1F
20
+5V
DATA
1/6
74HC05
VIN
Figure 39. A Digitally Programmable Window Detector
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