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參數(shù)資料
| 型號(hào)： | AD7665ASTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/23頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT CMOS 5V 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 570k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 74mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 4 個(gè)單端，單極；4 個(gè)單端，雙極 |
| 配用： | EVAL-AD7665CBZ-ND - BOARD EVALUATION FOR AD7665 |
REV.
AD7665
–13–
TYPICAL CONNECTION DIAGRAM
Figure 5 shows a typical connection diagram for the AD7665. Different circuitry shown on this diagram is optional and is discussed below.
100nF
10 F
100nF
10 F
AVDD
10 F
100nF
AGND
DGND
DVDD
OVDD
OGND
SER/
PAR
CNVST
BUSY
SDOUT
SCLK
RD
CS
RESET
PD
REFGND
CREF
2.5V REF
REF
50
D
CLOCK
AD7665
C/ P/DSP
SERIAL
PORT
DIGITAL SUPPLY
(3.3V OR 5V)
ANALOG
SUPPLY
(5V)
DVDD
OB/
2C
NOTE 8
BYTESWAP
DVDD
50k
100nF
1M
INA
100nF
U2
IND
INGND
ANALOG
INPUT
( 10V)
CC
2.7nF
U1
15
10 F
NOTE 2
NOTE 1
NOTE 3
NOTE 7
NOTE 4
50
INC
INB
NOTE 6
NOTES
1. SEE VOLTAGE REFERENCE INPUT SECTION.
2. WITH THE RECOMMENDED VOLTAGE REFERENCES, CREF IS 47 F. SEE VOLTAGE REFERENCE INPUT SECTION.
3. OPTIONAL CIRCUITRY FOR HARDWARE GAIN CALIBRATION.
4. FOR BIPOLAR RANGE ONLY. SEE SCALER REFERENCE INPUT SECTION.
5. THE AD8021 IS RECOMMENDED. SEE DRIVER AMPLIFIER CHOICE SECTION.
6. WITH 0V TO 2.5V RANGE ONLY. SEE ANALOG INPUTS SECTION.
7. OPTION. SEE POWER SUPPLY SECTION.
8. OPTIONAL LOW JITTER
CNVST. SEE CONVERSION CONTROL SECTION.
+
++
+
AD8031
AD8021
50
ADR421
NOTE 5
WARP
IMPULSE
Figure 5. Typical Connection Diagram (±10 V Range Shown)
Table III. Output Codes and Ideal Input Voltages
Digital Output
Code (Hexa)
Straight Twos
Description
Analog Input
Binary
Complement
Full-Scale Range
1
±10 V
±5 V
±2.5 V
0 V to 10 V
0 V to 5 V
0 V to 2.5 V
Least Significant Bit 305.2 V
152.6 V
76.3 V
152.6 V
76.3 V
38.15 V
FSR – 1 LSB
9.999695 V
4.999847 V
2.499924 V
9.999847 V
4.999924 V 2.499962 V
FFFF
2
7FFF
2
Midscale + 1 LSB
305.2 V
152.6 V
76.3 V
5.000153 V
2.570076 V 1.257038 V
8001
0001
Midscale
0 V
5 V
2.5 V
1.25 V
8000
0000
Midscale – 1 LSB
–305.2 V
–152.6 V
–76.3 V
4.999847 V
2.499924 V 1.249962 V
7FFF
FFFF
–FSR + 1 LSB
–9.999695 V –4.999847 V –2.499924 V 152.6 V
76.3 V
38.15 V
0001
8001
–FSR
–10 V
–5 V
–2.5 V
0 V
0000
3
8000
3
NOTES
1Values with REF = 2.5 V; with REF = 3 V, all values will scale linearly.
2This is also the code for an overrange analog input.
3This is also the code for an underrange analog input.
C
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