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參數(shù)資料
| 型號： | AD8522ARZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 12BIT DUAL 5V 14-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Fundamentals DAC Architectures |
| 產(chǎn)品變化通告： | AD8522 Redesign Change 29/Nov/2010 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 設(shè)置時間： | 16µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 25mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SO |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電壓，單極 |
| 采樣率（每秒）： | 62.5k |
| 產(chǎn)品目錄頁面： | 785 (CN2011-ZH PDF) |
AD8522
input register and transferring the 12 bits of data into the de-
coded address determined by the address bits A and B in the se-
rial input register.
Unipolar Output Operation
This is the basic mode of operation for the AD8522. The
AD8522 has been designed to drive loads as low as 820
in
parallel with 500 pF. The code table for this operation is shown
in Table III.
Table III. Unipolar Code Table
Hexadecimal
Decimal
Analog
Number in
Output
DAC Register
Voltage (V)
FFF
4095
+4.095
801
2049
+2.049
800
2048
+2.048
7FF
2047
+2.047
000
0
5
2
0
1
3
4
10
100
100k
10k
1k
RL TIED TO AGND
DATA = FFFH
VDD = +5V
TA = +25
°C
RL TIED TO +5V
DATA = 000H
LOAD RESISTANCE –
OUTPUT
VOLTAGE
–
Volts
VINH = +5V
VINL = 0V
Figure 6. Output Swing vs. Load
80
60
40
20
0
–20
–40
–60
–80
123
OUTPUT VOLTAGE – Volts
OUTPUT
CURRENT
–
mA
DATA = 800H
POSITIVE
CURRENT
LIMIT
NEGATIVE
CURRENT
LIMIT
Figure 9. IOUT vs. VOUT
5.2
5.0
4.8
4.6
4.4
4.2
4.0
0.01
0.1
100
10
1.0
OUTPUT LOAD CURRENT – mA
V
DD
MIN
–
Volts
VFS ≤ 1 LSB
DATA = FFFH
TA = +25°C
PROPER OPERATION
WHEN VDD SUPPLY
VOLTAGE IS ABOVE
CURVE
Figure 7. Minimum Supply Voltage
vs. Load Current
100
90
10
0%
200V/DIV
100s/DIV
TA = +25°C
NBW = 1MHz
Figure 10. Broadband Noise
1
10
1000
100
1
0.1
10
0.01
+85
°C
–55
°C
+25
°C
VDD = +5V
DATA = 000H
VIH = 5.0V
VIL = 0.0V
OUTPUT SINK CURRENT – A
OUTPUT
PULL-DOWN
VOLTAGE
–
mV
Figure 8. Pull-Down Voltage vs. Out-
put Sink Current Capability
9
8
7
6
5
4
3
2
1
0
01
3
4
5
2
VDD = +4.5V
VDD = +5V
TA = +25°C
SUPPLY
CURRENT
I
DD
–
mA
LOGIC INPUT VOLTAGE VINH – Volts
Figure 11. Supply Current vs. Logic
Input Voltage
Typical Performance Characteristics
is possible down to +4.3 V. The minimum operating supply
voltage versus load current plot, in Figure 7, provides informa-
tion for operation below VDD = +4.5 V.
TIMING AND CONTROL
The AD8522 has a 16-bit serial input register that accepts
clocked in data when the CS pin is active low. The DAC regis-
ters are updated by the Load Enable (LDA and LDB) pins.
The AD8522 offers two modes of data loading. The first mode,
hardware-load, directs the data currently clocked into the serial
shift register into either the DAC A or the DAC B register or
both depending on the external active low strobing of the LDA
or LDB pin. Serial data register bit Sf/Hd must be low for this
mode to be in effect.
The second mode of operation is software-load which is de-
signed to minimize the number of control lines connected to
the AD8522. In this mode of operation the LDA and LDB pins
act as one control input taking the present contents of the serial
–6–
REV. A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8522ARZ | 制造商:Analog Devices 功能描述:IC, DAC, 12BIT, 62.5KSPS, SOIC-14 |
| AD8522ARZ-REEL | 功能描述:IC DAC DUAL 12BIT 5V 14SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時間:2µs 位數(shù):14 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）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
| AD8522JRU | 制造商:Rochester Electronics LLC 功能描述:+5V DUAL 12-BIT DAC - Bulk 制造商:Analog Devices 功能描述: |
| AD8522JRU-REEL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 12-bit 14-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD8527 | 制造商:AD 制造商全稱:Analog Devices 功能描述:7 MHz Rail-to-Rail Low Voltage Operational Amplifiers |
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