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參數(shù)資料
| 型號： | LTC2053CDD#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP INST 0-DRFT R-R I/O 8-DFN |
| 標準包裝： | 2,500 |
| 放大器類型： | 斷路器（零漂移） |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉換速率： | 0.2 V/µs |
| 增益帶寬積： | 200kHz |
| 電流 - 輸入偏壓： | 4nA |
| 電壓 - 輸入偏移： | 5µV |
| 電流 - 電源： | 950µA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 11 V，±1.35 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WFDFN 裸露焊盤 |
| 供應商設備封裝： | 8-DFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
LTC2053/LTC2053-SYNC
2053syncfc
applicaTions inForMaTion
Figure 2. Centered Justified for a Single Line of Text
If a square wave is used to drive the CLK pin, a 5s RC
time constant should be placed in front of the CLK pin to
maintain low offset voltage performance (see Figure 2).
This avoids internal and external coupling of the high
frequency components of the external clock at the instant
the LTC2053-SYNC holds the sampled input.
–
+
–
+
VD
V+IN
VOUT
EXTERNAL
CLOCK
V–IN
3
2053 F02
8
5V
4
5
1
6 R2
1k
R1
7
2
LTC2053-SYNC
CLK
5V
4.7nF
0V
The LTC2053-SYNC is tested with a sample clock of 3kHz
(fCLK = 24kHz) to the same specifications as the LTC2053.
In addition, the LTC2053-SYNC is tested at one-half and
2x this frequency to verify proper operation. The curves
in the Typical Performance Characteristics section of this
data sheet apply to the LTC2053-SYNC when driving it
with a 24kHz clock at Pin 1 (fCLK = 24kHz, 3kHz sample
clock rate). Below are three curves that show the behavior
of the LTC2053-SYNC as the clock frequency is varied.
The offset is essentially unaffected over a 2:1 increase or
decrease of the typical LTC2053 sample clock speed. The
bias current is directly proportional to the clock speed.
The noise is roughly proportional to the square root of
the clock frequency. For optimum noise and bias current
performance, drive the LTC2053-SYNC with a nominal
24kHz external clock (3kHz sample clock).
Figure 3. LTC2053-SYNC Input
Offset vs Sample Frequency
SAMPLE FREQUENCY (Hz) (= FCLK/8)
0
INPUT
OFFSET
(
V)
20
15
10
5
0
–5
–10
–15
–20
2000
4000
6000
8000
2053 F03
10000
VS = ±5V
VS = 5V
VS = 3V
TYP LTC2053
SAMPLE FREQUENCY
SAMPLE FREQUENCY (Hz) (= FCLK/8)
0
INPUT
BIAS
CURRENT
(nA)
14
12
10
8
6
4
2
0
2000
4000
6000
8000
2053 F04
10000
VS = 5V
VREF = 0
VCM = 1V
TYP LTC2053
SAMPLE FREQUENCY
SAMPLE FREQUENCY (FCLK/8)
0
INPUT
REFERRED
NOISE
VOLTAGE
(V
PP
)
12
10
8
6
4
2
0
2000
4000
6000
8000
2053 F05
10000
TYP LTC2053
SAMPLE FREQUENCY
VS = 5V
TA = 25°C
NOISE IN 10Hz BANDWIDTH
Figure 4. LTC2053-SYNC Average Input
Bias Current vs Sample Frequency
Figure 5. LTC2053-SYNC Input Referred
Noise vs Sample Frequency
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