參數資料
| 型號： | AD660BN |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 2/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 16BIT MONO W/VREF 24-DIP |
| 產品培訓模塊： | Data Converter Fundamentals DAC Architectures |
| 標準包裝： | 15 |
| 系列： | DACPORT® |
| 設置時間： | 6µs |
| 位數： | 16 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 電壓電源： | 模擬和數字，雙 ± |
| 功率耗散（最大）： | 625mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 24-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 24-PDIP |
| 包裝： | 管件 |
| 輸出數目和類型： | 1 電壓，單極；1 電壓，雙極 |
| 采樣率（每秒）： | 167k |
AD660
Rev. B | Page 10 of 20
THEORY OF OPERATION
The AD660 uses an array of bipolar current sources with MOS
current steering switches to develop a current proportional to the
applied digital word, ranging from 0 mA to 2 mA. A segmented
architecture is used, where the most significant four data bits
are thermometer decoded to drive 15 equal current sources.
The lesser bits are scaled using a R-2R ladder, then applied
together with the segmented sources to the summing node of
the output amplifier. The internal span/bipolar offset resistor
can be connected to the DAC output to provide a 0 V to 10 V
span, or it can be connected to the reference input to provide a
10 V to +10 V span.
HBE
CONTROL
LOGIC
SER
CLR
LDAC
REF IN
10k
10.05k
REF OUT
DB0/
DB8/
SIN
DB1/DB9/
DATADIR
CS
DB7/
DB15
AD660
SOUT
VOUT
AGND
SPAN/
BIPOLAR
OFFSET
DGND
–VEE
+VCC
+VLL
10V REF
16-BIT LATCH
16-BIT DAC
16-BIT LATCH
16
17
18
19
23
24
20
21
22
13
5
1
2
3
4
11
12
14
15
01
81
3-
0
07
LBE/
CLEAR SELECT
Figure 7. Functional Block Diagram
ANALOG CIRCUIT CONNECTIONS
Internal scaling resistors provided in the AD660 can be connected
to produce a unipolar output range of 0 V to 10 V or a bipolar
output range of 10 V to +10 V. Gain and offset drift are mini-
mized in the AD660 because of the thermal tracking of the
scaling resistors with other device components.
UNIPOLAR CONFIGURATION
The configuration shown in Figure 8 provides a unipolar 0 V to
10 V output range. In this mode, 50 Ω resistors are tied between
the SPAN/BIPOLAR OFFSET terminal (Pin 22) and VOUT (Pin 21),
and between REF OUT (Pin 24) and REF IN (Pin 23). It is possible
to use the AD660 without any external components by tying Pin 24
directly to Pin 23 and Pin 22 directly to Pin 21. Eliminating
these resistors increases the gain error by 0.25% of FSR.
HBE
CONTROL
LOGIC
SER
CLR
LDAC
REF IN
REF OUT
AD660
SOUT
VOUT
AGND
OUTPUT
R2
50
R1
50
SPAN/
BIPOLAR
OFFSET
DGND
–VEE
+VCC
+VLL
10V REF
16-BIT LATCH
16-BIT DAC
16
17
18
19
23
24
20
21
22
13
1
2
3
4
15
01
813
-00
8
10k
10.05k
DB1/DB9/
DATADIR
11
LBE/
CLEAR SELECT
DB0/
DB8/
SIN
CS
DB7/
DB15
5
12
14
16-BIT LATCH
Figure 8. 0 V to 10 V Unipolar Voltage Output
If it is desired to adjust the gain and offset errors to zero, this
can be accomplished using the circuit shown in Figure 9. The
adjustment procedure is as follows:
1.
Zero adjust.
Turn all bits off and adjust the zero trimmer, R4, until the
output reads 0.000000 V (1 LSB = 153 μV).
2.
Gain adjust.
Turn all bits on and adjust the gain trimmer, R1, until the
output is 9.999847 V. (Full scale is adjusted to 1 LSB less
than the nominal full scale of 10.000000 V.)
HBE
CONTROL
LOGIC
SER
CLR
LDAC
REF IN
REF OUT
AD660
SOUT
VOUT
AGND
OUTPUT
R2
50
R3
16k
R4
10k
R1
100
SPAN/
BIPOLAR
OFFSET
DGND
–VEE
+VCC
–VEE
+VCC
+VLL
10V REF
16-BIT LATCH
16-BIT DAC
16
17
18
19
23
24
20
21
22
13
1
2
3
4
15
01
81
3-
0
09
10k
10.05k
DB1/DB9/
DATADIR
11
LBE/
CLEAR SELECT
DB0/
DB8/
SIN
CS
DB7/
DB15
5
12
14
16-BIT LATCH
Figure 9. 0 V to 10 V Unipolar Voltage Output with Gain and Offset
Adjustment
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| AD660BNZ | 功能描述:IC DAC 16BIT MONO W/VREF 24DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:DACPORT® 標準包裝:1 系列:- 設置時間:4.5µs 位數:12 數據接口:串行，SPI? 轉換器數目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
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| AD660BR-REEL | 功能描述:IC DAC 16BIT MONO W/VREF 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:DACPORT® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設置時間:1µs 位數:8 數據接口:串行 轉換器數目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數目和類型:8 電壓，單極 采樣率（每秒）:* |
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