參數(shù)資料
型號(hào): SHC605
元件分類: 運(yùn)動(dòng)控制電子
英文描述: High-Speed Operational TRACK-AND-HOLD AMPLIFIER
中文描述: 高速運(yùn)算采樣保持放大器
文件頁(yè)數(shù): 11/15頁(yè)
文件大小: 200K
代理商: SHC605
11
SHC605
FIGURE 5. Gain of –1 Track-and-Hold Amplifier.
FIGURE 6. Differential Gain of 1 Track-and-Hold Amplifier.
LOCKOUT CIRCUITRY
The SHC605 includes additional logic circuitry which al-
lows edge-triggered operation for sampling ADCs. The
lockout comparator and Track/Hold comparator form a wired-
or mode control circuit as shown in the block diagram on
page one. When the Lock input, pin 14, is high with respect
to the Lock input, pin 13, the SHC605 is in the Hold-mode
regardless of the Hold/Hold inputs. This feature provides
more flexibility in the convert command duty cycle and
reduces noise resulting from aperture jitter.
Figure 7 shows how the SHC605 lockout circuit can be used
with an ECL one-shot to provide an edge-triggered sampling
ADC. An ECL threshold voltage is generated on Thresh/
Hold (Pin 11), which is connected to Lock (Pin 13), to allow
a single-ended lockout input on Lock (Pin 14). The ECL
convert command is applied directly to the SHC605. The
10ns delay on the ADCs convert signal is to allow for
SHC605 track-to-hold settling. The one-shot’s duty cycle
FIGURE 7. Edge-Triggered ADC.
APPLICATIONS INFORMATION
LOGIC COMPATIBILITY/TRACK-TO-HOLD
SWITCHING
The SHC605 contains an internal reference circuit which
produces either an ECL or TTL logic threshold voltage for
single-ended track-to-hold switching. Differential ECL
switching is also possible with the SHC605. Table I provides
the proper pin connections for all of the possible switching
options and the Performance Specifications Table gives the
logic levels and input bias currents.
DGND
(Pin 4)
SELECT
(Pin 10)
THRESH/HOLD
(Pin 11)
HOLD
(Pin 12)
LOGIC TYPE
Single-ended TTL
Single-ended ECL
Differential ECL
GND
GND
NC
+5V
–5V
NC
NC
NC
Clock
Clock
Clock
Clock
TABLE I. Track-to-Hold Switching Options.
HOLD
LOCK
MODE
0
0
1
1
0
1
0
1
Track
Hold
Hold
Hold
+In
+V
S
+V
S
DGND
AGND
AGND
AGND
–In
–V
S
–V
S
Lock
Lock
Hold
Hold
Select
V
OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1μF
.01μF
.01μF
1μF
–5V
+5V
V
IN
50
Digital
Output
10ns
Delay
Line
ECL Convert Command
(10ns minimum pulsewidth)
ADC
V
OUT
Convert
ECL
One-Shot
+In
+V
S
+V
S
DGND
AGND
AGND
AGND
–In
–V
S
–V
S
Lock
Lock
Hold
Hold
Select
V
OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1μF
.01μF
.01μF
1μF
–5V
+5V
NC
Hold
+5V = TTL
–5V = ECL
V
OUT
249
249
V
IN
125
R
1
R
2
V
IN
V
OUT
R
1
R
2
= –
+In
+V
S
+V
S
DGND
AGND
AGND
AGND
–In
–V
S
–V
S
Lock
Lock
Hold
Hold
Select
V
OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1μF
.01μF
.01μF
1μF
–5V
+5V
V
+IN
NC
Hold
+5V = TTL
–5V = ECL
V
OUT
249
249
V
–IN
249
249
V
OUT
R
1
R
2
= (V
+IN
– V
–IN
)
R
1
R
2
R
2
R
1
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SHC605AU 制造商:BB 制造商全稱:BB 功能描述:High-Speed Operational TRACK-AND-HOLD AMPLIFIER
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SHC-62 功能描述:CLAMP SNAP-IT .953-1.094" RoHS:是 類別:線纜,導(dǎo)線 - 管理 >> 線夾和夾具 系列:SHC 標(biāo)準(zhǔn)包裝:100 系列:TC 類型:C-夾 開(kāi)口尺寸:0.79" L x 0.54" W x 0.67" H(20.1mm x 13.7mm x 17.0mm) 安裝類型:釘子 材質(zhì):聚丙烯 顏色:黑