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參數(shù)資料
| 型號： | ADC10321CIVT |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | ADC |
| 英文描述： | 10-Bit, 20MSPS, 98mW A/D Converter with Internal Sample and Hold |
| 中文描述： | 1-CH 10-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PQFP32 |
| 封裝： | TQFP-32 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 414K |
| 代理商： | ADC10321CIVT |
AC Electrical Characteristics
(Continued)
The following specifications apply for V
= +5.0V
, V
I/O = 5.0V
, V
+ = +3.5V
DC
, V
REF
= +1.5V
, f
= 20MHz,
t
= t
= 5ns, R
S
= 25
. C
L
(data bus loading) = 20 pF,
Boldface limits apply for T
A
= T
MIN
to T
MAX
:
all other limits T
A
=
25C(Note 7)
Symbol
Parameter
Conditions
Typical
(Note 8)
10
20
12
Limits
(Note 9)
Units
(Limits)
ns
ns(max)
ns
t
r
, t
f
t
OD
t
OH
Output Rise and Fall Times
Fall of CLK to data valid
Output Data Hold Time
25
t
DIS
Rising edge of OE to valid data
From output High,
2K to Ground
From output Low,
2K to V
D
I/O
1K to V
CC
25
ns
18
ns
t
EN
t
VALID
t
AJ
Falling edge of OE to valid data
Data valid time
Aperture Jitter
Full Scale Step Response
25
40
<
30
1
ns
ns
ps
t
r
= 10ns
V
IN
step from
(V
REF
+ +100mV) to
(V
REF
)
conversion
Overrange Recovery Time
1
conversion
t
WU
PD low to 1/2 LSB accurate
conversion (Wake-Up time)
700
ns
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed speci-
fications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 2:
All voltages are measured with respect to GND = AGND = DGND = 0V, unless otherwise specified.
Note 3:
When the input voltage at any pin exceeds the power supplies ( V
IN
<
AGND or V
IN
>
V
A
or V
D
), the current at that pin should be limited to 25mA. The 50mA
maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 25mA to two.
Note 4:
The absolute maximum junction temperature (T
J
max) for this device is 150C. The maximum allowable power dissipation is dictated by TJmax, the
junction-to-ambient thermal resistance (
θ
JA
), and the ambient temperature (T
A
), and can be calculated using the formula P
D
MAX = (T
J
max - T
A
)/
θ
JA
. In the 32-pin
TQFP,
θ
JA
is 69C/W, so P
D
MAX = 1,811 mW at 25C and 942mW at the maximum operating ambient temperature of 85C. Note that the power dissipation of this
device under normal operation will typically be about 110mW (98mW quiescent power + 2mW reference ladder power +10mW due to 10 TTL load on each digital out-
put). The values for maximum power dissipation listed above will be reached only when the ADC10321 is operated in a severe fault condition (e.g. when input or out-
put pins are driven beyond the power supply voltages, or the power supply polarity is reversed). Obviously, such conditions should always be avoided.
Note 5:
Human body model is 100 pF capacitor discharged through a 1.5k
resistor. Machine model is 220 pF discharged through ZERO
.
Note 6:
See AN450,
″
Surface Mounting Methods and Their Effect on Product Reliability
″
, or the section entitled
″
Surface Mount
″
found in any post 1986 National
Semiconductor Linear Data Book, for other methods of soldering surface mount devices.
Note 7:
The inputs are protected as shown below. Input voltage magnitudes up to 500mV beyond the supply rails will not damage this device. However, errors in
the A/D conversion can occur if the input goes above V
A
or below AGND by more than 300 mV.
Note 8:
Typical figures are at T
A
= T
J
= 25C, and represent most likely parametric norms.
Note 9:
Tested limits are guaranteed to Nationsl’s AOQL (Average Outgoing Quality Level).
Note 10:
When the input signal is between V
REF
+ and (V
A
+ 300mV), the output code will be 3FFh, or all 1s. When the input signal is between 300 mV and V
REF
,
the output code will be 000h, or all 0s.
DS100897-11
DS100897-12
DS100897-24
A
www.national.com
7
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| ADC10321CIVT/NOPB | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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