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參數(shù)資料
| 型號(hào)： | LTC1411CG#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 2.5MSPS 36SSOP |
| 標(biāo)準(zhǔn)包裝： | 37 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 2.5M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 325mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 36-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 36-SSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 2 個(gè)單端，雙極；1 個(gè)差分，雙極 |
6
LTC1411
1411f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Acquisition Time
vs Source Resistance
4096 Points FFT Plot (1MHz)
FREQUENCY (kHz)
0
–40
–20
0
1000
1411 G15
–60
–80
250
500
750
1250
–100
–120
–140
AMPLITUDE
(dB)
SINAD = 75dB
SFDR = 81dB
fSAMPLE = 2.5MHz
fIN = 1MHz
SOURCE RESISTANCE (
)
1
ACQUISITION
TIME
(
s)
1
10
10000
1411 G16
0.1
0.01
10
100
1000
100000
100
AIN+ (Pin 1): Positive Analog Input. The ADC converts the
difference voltage between AIN+ and AIN– with program-
mable input ranges of
±1.8V, ±1.27V, ±0.9V and ±0.64V
depending on PGA selection. AIN+ has common mode
range between 0V and VDD.
AIN– (Pin 2): Negative Analog Input. This pin can be tied
to the REFOUT pin of the ADC or tied to an external DC
voltage. This voltage is also the bipolar zero for the ADC.
AIN– has common mode range between 0V and VDD.
REFOUT (Pin 3): 2.5V Reference Output. Bypass to AGND1
with a 22
F tantalum capacitor if REFOUT is tied to AIN–.
No capacitor is needed if the external reference is used to
drive AIN–.
REFIN (Pin 4): Reference Buffer Input. This pin can be
tied to REFOUT or to an external reference if more
precision is required.
REFCOM1 (Pin 5): Noise Reduction Pin. Put a 10
F
bypass capacitor at this pin to reduce the noise going into
the reference buffer.
REFCOM2 (Pin 6): 4.05V Reference Compensation Pin.
Bypass to AGND1 with a 10
F tantalum capacitor in
parallel with a 0.1
F ceramic.
UU
U
PI FU CTIO S
AGND (Pins 7 to 9): Analog Ground. AGND1 is the ground
for the reference. AGND2 is the ground for the comparator
and AGND3 is the ground for the remaining analog
circuitry.
AVP (Pin 10): 5V Analog Power Supply. Bypass to AGND
with a 10
F tantalum capacitor.
AVM (Pin 11): Analog and Digital Substrate Pin. Tie this
pin to AGND.
D13 to D0 (Pins 12 to 25): Digital Data Outputs. D13 is the
MSB (Most Significant Bit).
OTR (Pin 26): Out-of-the-Range Pin. This pin can be used
in conjunction with D13 to determine if a signal is less than
or greater than the analog input range. If D13 is low and
OTR is high, the analog input to the ADC exceeds the
maximum voltage of the input range.
BUSY (Pin 27): Busy Output. Converter status pin. It is
low during conversion.
OGND (Pin 28): Digital Ground for Output Drivers (Data
Bits, OTR and BUSY).
OVDD (Pin 29): 3V or 5V Digital Power Supply for Output
Drivers (Data Bits, OTR and BUSY). Bypass to OGND with
a 10
F tantalum capacitor.
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