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参数资料
| 型号： | AD9070BR |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | ADC |
| 英文描述： | 10-Bit, 100 MSPS A/D Converter |
| 中文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封装： | PLASTIC, SOIC-28 |
| 文件页数： | 12/16页 |
| 文件大小： | 254K |
| 代理商： | AD9070BR |
AD9070
–
12
–
REV. B
AD9070BR EVALUATION BOARD
10H176
ECL
RECVR
E4
E6
PIN 2
E7
E5
PIN 21
BUFFERED
AND
LATCHED
ON-CARD
ENCODE
CARD
CONNECTOR
50
CLK
AIN
AIN
BYPASS
COMP
VREF IN
VREF OUT
ENC
ENC
1 OF 2
10H176
HEX D FF
TO CARD
CONNECT
1 OF 4
10H116
AD9070
1k
–
5V
E19
E9
E8
CLKB
AIN
J2
J4
E1
E2
E3
AD780 REFERENCE
1k
50
50
Figure 23.
The AD9070 evaluation board is a convenient and easy way to
evaluate the performance of the AD9070 in the SOIC package.
The board consists of an AD780 voltage reference (configured
for –2.5 V), two 10H176 (hex D flip flop) for capturing data
from the A/D converter and five 10H116 triple line receivers for
buffering the encode signal and driving the data via the edge
connector. Termination resistors (RP11, RP12, and RP14) are
provided for the data leaving the board via the connector; (they
can be removed if termination resistors are already provided by
the user).
Analog Input
The evaluation board requires a 1 V peak-to-peak signal
centered at ground (J1). This signal is ac coupled and then dc
shifted –2.5 V before it is input to the A/D converter.
Encode
The AD9070 encode inputs can be driven single ended
(connect E9 to E19 and drive J2 with an ECL signal) or
differentially (connect E8 to E19 and drive J2 and J4 with
differential ECL signals). The board is shipped in single ended
configuration. The differential encode signal leaving the board
via the connector can be inverted by interchanging E4, E5, E6,
and E7 (connect E4 to E7 and E5 to E6 or E4 to E6 and E7 to
E5). This ensures that the user will be able to capture the data
coming from the evaluation board.
Data Out
Data goes single-ended into the 10H116 flip flops but comes
out differentially. The data coming out of the AD9070 is in twos
complement format, but is changed to straight binary by
inverting the MSB at the connector (on the schematic Bit 1 and
Bit 1B are swapped).
Voltage Reference
The AD9070 can be operated using its internal bandgap
reference (connect E2 to E3) or the on board AD780 external
reference (connect E1 to E3). The board is shipped utilizing the
internal voltage reference.
Layout
The AD9070 is not layout sensitive if some important guide-
lines are met. The evaluation board layout provides an
example where these guidelines have been followed to
optimize performance.
Provide a good ground plane connecting the analog and
digital sections.
Excellent bypassing is essential. Chip caps with 0.1
μ
F values
and 0603 dimensions are placed flush against the pins.
Placing any of the caps on the bottom of the board can
degrade performance. These techniques reduce the amount
of parasitic inductance which can impact the bypassing ability
of the caps.
Separate power planes and supplies for the analog and digital
sections are recommended.
The AD9070 evaluation board is provided as a design example
for customers of Analog Devices. ADI makes no warranties
express, statutory, or implied regarding merchantability or
fitness for a particular purpose.
相关PDF资料 |
PDF描述 |
|---|---|
| AD9071 | 10-Bit, 100 MSPS A/D Converter |
| AD9071BR | 10-Bit, 100 MSPS A/D Converter |
| AD9100AD | Ultrahigh Speed Monolithic Track-and-Hold |
| AD9100JD | Ultrahigh Speed Monolithic Track-and-Hold |
| AD9100SD | Ultrahigh Speed Monolithic Track-and-Hold |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9070BR-REEL | 制造商:Analog Devices 功能描述:ADC Single 100Msps 10-bit Parallel 28-Pin SOIC T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD9070TD | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 10-Bit |
| AD9071 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 100 MSPS A/D Converter |
| AD9071/PCB | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 100 MSPS A/D Converter |
| AD90717 | 制造商:Analog Devices 功能描述:- Trays |
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