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參數(shù)資料
| 型號： | EVAL-AD7705EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs |
| 中文描述： | 3伏/ 5伏，1毫瓦2-/3-Channel 16位Σ-Δ模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/32頁 |
| 文件大?。?/td> | 264K |
| 代理商： | EVAL-AD7705EB |
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AD7705/AD7706
TIMING CHARACTERISTICS
1, 2
–4–
REV. A
Limit at T
MIN
, T
MAX
(B Version)
400
2.5
0.4
×
t
CLKIN
0.4
×
t
CLKIN
500
×
t
CLKIN
100
Parameter
f
CLKIN
Units
kHz min
MHz max
ns min
ns min
ns nom
ns min
Conditions/Comments
Master Clock Frequency: Crystal Oscillator or Externally Supplied
for Specified Performance
Master Clock Input Low Time. t
CLKIN
= 1/f
CLKIN
Master Clock Input High Time
DRDY
High Time
RESET
Pulsewidth
3, 4
t
CLKIN LO
t
CLKIN HI
t
1
t
Read Operation
t
3
t
4
t
55
0
120
0
80
100
100
100
0
10
60
100
100
ns min
ns min
ns min
ns max
ns max
ns min
ns min
ns min
ns min
ns max
ns max
ns max
DRDY
to
CS
Setup Time
CS
Falling Edge to SCLK Rising Edge Setup Time
SCLK Falling Edge to Data Valid Delay
V
DD
= +5V
V
= +3.0V
SCLK High Pulsewidth
SCLK Low Pulsewidth
CS
Rising Edge to SCLK Rising Edge Hold Time
Bus Relinquish Time after SCLK Rising Edge
V
DD
= +5V
V
= +3.0V
SCLK Falling Edge to
DRDY
High
7
t
6
t
7
t
8
t
96
t
10
Write Operation
t
11
t
12
t
13
t
14
t
15
t
16
120
30
20
100
100
0
ns min
ns min
ns min
ns min
ns min
ns min
CS
Falling Edge to SCLK Rising Edge Setup Time
Data Valid to SCLK Rising Edge Setup Time
Data Valid to SCLK Rising Edge Hold Time
SCLK High Pulsewidth
SCLK Low Pulsewidth
CS
Rising Edge to SCLK Rising Edge Hold Time
NOTES
1
Sample tested at +25
°
C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of V
DD
) and timed from a voltage level of 1.6 V.
2
See Figures 16 and 17.
3
f
Duty Cycle range is 45% to 55%. f
must be supplied whenever the AD7705/AD7706 is not in Standby mode. If no clock is present in this case, the device
can draw higher current than specified and possibly become uncalibrated.
4
The AD7705/AD7706 is production tested with f
at 2.4576MHz (1MHz for some I
tests). It is guaranteed by characterization to operate at 400kHz.
5
These numbers are measured with the load circuit of Figure 1 and defined as the time required for the output to cross the V
or V
limits.
6
These numbers are derived from the measured time taken by the data output to change 0.5V when loaded with the circuit of Figure 1. The measured number is
then extrapolated back to remove effects of charging or discharging the 50 pF capacitor. This means that the times quoted in the timing characteristics are the
true bus relinquish times of the part and as such are independent of external bus loading capacitances.
7
DRDY
returns high after the first read from the device after an output update. The same data can be read again, if required, while
DRDY
is high, although care
should be taken that subsequent reads do not occur close to the next output update.
TO OUTPUT
PIN
50pF
I
SINK
(800
m
A AT V
DD
= +5V
100
m
A AT V
DD
= +3V)
+1.6V
I
SOURCE
(200
m
A AT V
DD
= +5V
100
m
A AT V
DD
= +3V)
Figure 1. Load Circuit for Access Time and Bus Relinquish Time
(V
DD
= +2.7V to +5.25V; GND = 0 V; f
CLKIN
= 2.4576MHz; Input Logic 0 = 0 V, Logic 1 = V
DD
unless otherwise noted.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7705EBZ | 功能描述:BOARD EVALUATION FOR AD7705 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:- 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-AD7706EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD7706EBZ | 功能描述:BOARD EVALUATION FOR AD7706 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:- 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-AD7707EB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 3V/5 V, 610 V INPUT RANGE, 1 MW 3-CH 16BIT, SIG - Bulk |
| EVAL-AD7708EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
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