- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1979 > AD570JD (Analog Devices Inc)IC ADC 8BIT MONO W/CLK 18-CDIP PDF資料下載
參數(shù)資料
| 型號： | AD570JD |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 8BIT MONO W/CLK 18-CDIP |
| 產(chǎn)品變化通告： | Redesign Change 26/Apr/2012 |
| 標準包裝： | 1 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 40k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 800mW |
| 電壓電源： | 雙 ± |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 18-CDIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 18-CDIP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極；1 個單端，雙極 |
AD570
REV.
–4–
FULL-SCALE CALIBRATION
The 5 k
thin-film input resistor is laser trimmed to produce a
current which matches the full-scale current of the internal
DAC—plus about 0.3%—when a full-scale analog input voltage
of 9.961 volts (10 volts—1 LSB) is applied at the input. The in-
put resistor is trimmed in this way so that if a fine trimming
potentiometer is inserted in series with the input signal, the in-
put current at the full-scale input voltage can be trimmed down
to match the DAC full-scale current as precisely as desired.
However, for many applications the nominal 9.961 volt full
scale can be achieved to sufficient accuracy by simply inserting a
15
resistor in series with the analog input to Pin 13. Typical
full-scale calibration error will then be about
±2 LSB or ±0.8%.
If a more precise calibration is desired, a 200
trimmer should
be used instead. Set the analog input at 9.961 volts, and set the
trimmer so that the output code is just at the transition between
11111110 and 11111111. Each LSB will then have a weight of
39.06 mV. If a nominal full scale of 10.24 volts is desired
(which makes the LSB have a value of exactly 40.00 mV), a
50
resistor in series with a 200 trimmer (or a 500 trim-
mer with good resolution) should be used. Of course, larger full-
scale ranges can be arranged by using a larger input resistor, but
linearity and full-scale temperature coefficient may be compro-
mised if the external resistor becomes a sizable percentage of
5 k
.
BIPOLAR OPERATION
The standard unipolar 0 V to +10 V range is obtained by short-
ing the bipolar offset control pin to digital common. If the pin is
left open, the bipolar offset current will be switched into the
comparator summing node, giving a –5 V to +5 V range with an
Figure 4. Standard AD570 Connections
offset binary output code. (–5.00 volts in will give a 8-bit code
of 00000000; an input of 0.00 volts results in an output code of
10000000 and 4.96 volts at the input yields the 11111111 code.)
The bipolar offset control input is not directly TTL compatible,
but a TTL interface for logic control can be constructed as
shown in Figure 5.
Figure 5. Bipolar Offset Controlled by Logic Gate
Gate Output = 1: Unipolar 0 V–10 V Input Range
Gate Output = 0: Bipolar
±5 V Input Range
COMMON-MODE RANGE
The AD570 provides separate analog and digital common con-
nections. The circuit will operate properly with as much as
±200 mV of common-mode range between the two commons.
This permits more flexible control of system common bussing
and digital and analog returns.
In normal operation the analog common terminal may generate
transient currents of up to 2 mA during a conversion. In addi-
tion, a static current of about 2 mA will flow into analog com-
mon in the unipolar mode after a conversion is complete. An
additional 1 mA will flow in during a blank interval with zero
analog input. The analog common current will be modulated by
the variations in input signal.
The absolute maximum differential voltage rating between the
two commons is
±1 volt. We recommend that a parallel pair of
back-to-back protection diodes can be connected as shown in
Figure 6 if they are not connected locally.
Figure 6. Differential Common Voltage Protection
B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD571JD | IC ADC 10BIT MONO W/CLK 18-CDIP |
| AD5725BRSZ-REEL | IC DAC 12BIT QUAD PAR 28-SSOP |
| AD5735ACPZ-REEL7 | IC DAC QUAD VOLT CUR 64LFCSP |
| AD5737ACPZ | IC DAC QUAD 12BIT CUR 64-LFCSP |
| AD573JD | IC ADC 10BIT SAR REG 20-CDIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD570JD/+ | 制造商:Analog Devices 功能描述:ADC SGL SAR 8BIT PARALLEL 18PIN SBCDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:IC, MONO 8-BIT A/D CONV - Bulk |
| AD570JD883B | 制造商:AD 功能描述:_ |
| AD570JD-883B | 制造商:AD 功能描述:_ |
| AD570S | 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete 8-Bit A-to-D Converter |
| AD570SCHIPS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 8-Bit |
發(fā)布緊急采購，3分鐘左右您將得到回復。