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參數(shù)資料
| 型號(hào)： | EVAL-AD7663CBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/24頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7663 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 輸入范圍： | ±4 REF |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 35mW @ 250kSPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7663 |
| 已供物品： | 板，CD |
| 相關(guān)產(chǎn)品： | AD7663ACPZ-ND - IC ADC 16BIT CMOS 5V 48LFCSP AD7663ACPZRL-ND - IC ADC 16BIT CMOS 5V 48LFCSP AD7663ASTZRL-ND - IC ADC 16BIT CMOS 48-LQFP T/R AD7663ASTZ-ND - IC ADC 16BIT CMOS 48-LQFP |
REV. B
AD7663
–13–
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
100
D
CLOCK
AD7663
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
Figure 5. Typical Connection Diagram (±10 V Range Shown)
Figure 6 shows a simplified analog input section of the AD7663.
INC
INB
INA
4R
2R
R
IND
4R
AGND
AVDD
R1
CS
R = 1.28k
Figure 6. Simplified Analog Input
The four resistors connected to the four analog inputs form a resis-
tive scaler that scales down and shifts the analog input range to a
common input range of 0 V to 2.5 V at the input of the switched
capacitive ADC.
By connecting the four inputs INA, INB, INC, and IND to the
input signal itself, the ground, or a 2.5 V reference, other analog
input ranges can be obtained.
The diodes shown in Figure 6 provide ESD protection for the four
analog inputs. The inputs INB, INC, and IND have a high voltage
protection (–11 V to +30 V) to allow wide input voltage range.
Care must be taken to ensure that the analog input signal never
exceeds the absolute ratings on these inputs, including INA
(0 V to 5 V). This will cause these diodes to become forward-
biased and start conducting current. These diodes can handle a
forward-biased current of 120 mA maximum. For instance, when
using the 0 V to 2.5 V input range, these conditions could even-
tually occur on the input INA when the input buffer’s (U1) supplies
are different from AVDD. In such cases, an input buffer with a
short-circuit current limitation can be used to protect the part.
This analog input structure allows the sampling of the differential
signal between the output of the resistive scaler and INGND. Unlike
other converters, the INGND input is sampled at the same time as
the inputs. By using this differential input, small signals common
to both inputs are rejected as shown in Figure 7, which represents
the typical CMRR over frequency. For instance, by using INGND
to sense a remote signal ground, the difference of ground potentials
between the sensor and the local ADC ground is eliminated.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7663EDZ | 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| EVAL-AD7664CB | 制造商:Analog Devices 功能描述:Evaluation Kit For 16-Bit, 570 KSP Pulsar Unipolar CMOS ADC |
| EVAL-AD7664CBZ | 功能描述:BOARD EVALUATION FOR AD7664 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7665CB | 制造商:AD 制造商全稱:Analog Devices 功能描述:Evaluation Board AD766X/AD767X |
| EVAL-AD7665CBZ | 功能描述:BOARD EVALUATION FOR AD7665 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
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