- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄357567 > ADC-207MC (MURATA POWER SOLUTIONS INC) PDF資料下載
參數(shù)資料
| 型號： | ADC-207MC |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | ADC |
| 中文描述： | 1-CH 7-BIT FLASH METHOD ADC, PARALLEL ACCESS, CDIP18 |
| 封裝： | ROHS COMPLIANT, CERAMIC, DIP-18 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 210K |
| 代理商： | ADC-207MC |
USING TWO ADC-207’S FOR 8-BIT RESOLUTION
Two ADC-207’s (A and B) are cascadable for applications requiring
8-bit resolution. The device A provides a typical 7-bit output. The OVER-
FLOW signal of device A turns off device A and turns on the device B. The
OVERFLOW signal of device A is also used as MSB for 8-bit operation. The
device B provides the other seven bits from the input signal. Figure 4 shows
the circuit connections for the application.
BEAT FREQUENCY AND ENVELOPE TESTS
Figure 5 shows an actual ADC-207 plot of the Beat Frequency Test. This
test uses a 20MHz clock input to the ADC-207 with a 20.002MHz full-scale
sine wave input. Although the converter would not normally be used in this
mode because the input frequency violates Nyquist criteria for full recovery
of signal information, the test is an excellent demonstration of the ADC-
207’s high-frequency performance.
The effect of the 2kHz frequency difference between the input and the
clock is that the output will be a 2kHz sinusoidal digital data array which
"walks" along the actual input at the 2kHz beat note frequency. Any inabil-
ity to follow the 20.002MHz input will be immediately obvious by plotting
the digital data array. Further arithmetic analysis may be done on the data
array to determine spectral purity, harmonic distortion, etc. This test is an
excellent indication of:
1. Full power input bandwidth of all 128 comparators.
(Any gain loss would show as signal distortion.)
2. Phase response linearity vs. instantaneous signal magnitude.
(Phase problems would show as
improper codes.)
3. Comparator slew rate limiting.
Figure 6 shows an actual ADC-207 plot of the Envelope Test. This test
is a variation of the previous test but uses a 10.002MHz sinewave input to
give two overlapping cycles when the data is reconstructed by a D/A con-
verter output to an oscilloscope. The scope is triggered by the 20MHz clock
used by the A/D. Any asymmetry between positive and negative portions of
the signal will be very obvious. This test is an excellent indication of slew
rate capability. At the peaks of the envelope, consecutive samples swing
completely through the input voltage range.
NOTE: The output data bit numbering is offset by a
bit to the device B’s output.
9
CLOCK IN
GROUND
+5 VOLTS
8
1
2
3
13
12
11
CLOCK OUT
20k
6
4
5
0.01μF
10pF
18
6
10
TURN
+5V
8
4
1
9
3
6
8
1
4
+5V
REFERENCE
GROUND
9
18
3
7
7
10
OVERFLOW
ANALOG IN
CLOCK IN
OPTIONAL
MIDSCALE
ADJUST
+5.12
REFERENCE
IN
BIT 1 (MSB)
BIT2
BIT3
BIT4
BIT5
BIT6
BIT7
BIT8 (LSB)
11
12
13
14
15
16
17
+REFERENCE
+V
DD
OF
B1
B2
B3
B4
B5
B6
B7
DIG GND
CS1
ANALOG INPUT
CLOCK
CS2
–REFERENCE
ANALOG GROUND
+REFERENCE
OF
B1
B2
B3
B4
B5
B6
B7
CS1
CLOCK
ANALOG INPUT
+V
DD
CS2
–REFERENCE
2
10
11
12
13
14
15
16
17
2
ANALOG GROUND
DIG GND
Figure 3. Optional Pulse Shaping Circuit
Figure 4. Using Two ADC-207’s for 8-Bit Operation
ADC-207
7-Bit, 20MHz, CMOS Flash A/D Converters
DATEL
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA Tel: (508) 339-3000 www.datel.com e-mail: help@datel.com
30 Mar 2011 MDA_ADC-207.B02
Page 4 of 6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADE05 | SLIDE DIP SWITCH-5SWITCHES, SPST, LATCHED,THROUGH HOLE-STRAIGHT |
| ADE06SA | SLIDE DIP SWITCH-6SWITCHES, SPST, LATCHED,SURFACE MOUNT-STRAIGHT |
| ADF0204 | SLIDE DIP SWITCH-2SWITCHES, SPST, LATCHED,0.1A, 24VDC, THROUGH HOLE-STRAIGHT |
| ADF03 | SLIDE DIP SWITCH-3SWITCHES, SPST, LATCHED,THROUGH HOLE-STRAIGHT |
| ADF07T | SLIDE DIP SWITCH-7SWITCHES, SPST, LATCHED,THROUGH HOLE-STRAIGHT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC-207MM | 制造商:Murata Power Solutions 功能描述:ADC Single Flash 20Msps 7-bit Parallel 18-Pin CDIP |
| ADC-207MM-QL | 制造商:Murata Power Solutions 功能描述:ADC Single Flash 20Msps 7-bit Parallel 18-Pin CDIP |
| ADC208 | 制造商:MPSIND 制造商全稱:MPS Industries, Inc. 功能描述:1W, High Isolation SIP, Single & Dual Output DC/DC Converters |
| ADC-208A | 制造商:MURATA-PS 制造商全稱:Murata Power Solutions Inc. 功能描述:8-Bit, 20MSPS CMOS Flash A/D (ADC-208 Compatible) |
| ADC-208ALC | 制造商:Murata Power Solutions 功能描述:ADC Single Flash 20Msps 8-bit Parallel 24-Pin CLCC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。