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參數資料
| 型號： | AD7899 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Evaluation Board for 5V, 12-Bit, Serial 220kSPS ADC in 8-Pin Package |
| 中文描述： | 評估板為5V，12位，串行220kSPS ADC的8引腳封裝 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 484K |
| 代理商： | AD7899 |
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for
its use, nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of Analog
Devices.
a
Evaluation Board 400kSPS, 14-Bit ADC
EVAL-AD7899CB
Fig. 1: FUNCTIONAL BLOCK DIAGRAM
FEATURES
Full-Featured Evaluation Board for the AD7899
Eval-Board Controller Compatible
Stand Alone Capability
On-Board Analog Buffering and Reference
Various Linking Options
PC Software for Control and Data Analysis when used
with Eval-Board Controller
INT R O D U C T IO N
T his T echnical Note describes the evaluation board for the
AD7899 high speed, low power, 14-bit A/D converter that
operates from a single 5 V supply. Full data on the AD7899
is available in the AD7899 data sheet available from Analog
Devices and should be consulted in conjunction with this
T echnical Note when using the Evaluation Board.
On-board components include an AD780 which is a +2.5V
ultra high precision bandgap reference and an op-amp for the
analog inputs. T here are various link options which are
explained in detail on page 2.
Interfacing to this board is through a 96-way connector. T his
96-way connector is compatible with the EVAL -BOARD
C ONT ROL L ER which is also available from Analog De-
vices. External sockets are provided for the optional, exter-
nal,
CONVST
and C L K IN and V
D RIVE
inputs and the
VIN1-VIN4 inputs.
OPE R AT ING T HE AD 7899 E VAL UAT ION BOAR D
Power Supplies
When using this evaluation board with the EVAL-BOARD
CONT ROLLER all supplies are provided from the EVAL-
BOARD CONT ROL L ER through the 96 way connector.
When using the board as a stand alone unit external supplies
must be provided. T his evaluation board has seven power
supply inputs: V
DD
, A
GND
, +12V, -12V, A
GND
, V
DRIVE
and
D
GND
. If the evaluation board is used in stand-alone mode
+5V must be connected to the V
DD
input to supply the
AD7899 V
DD
pin and the AD780 voltage reference. +12V and
-12V are used to supply the op-amps. T he V
DRIVE
pin can be
driven by a voltage between +3V and +5V allowing the
evaluation board to be connected to both +3V and +5V
systems. T he supplies are decoupled to the relevant ground
plane with 10μF tantalum and 0.1μF multilayer ceramic
capacitors at the point where they enter the board. T he supply
pins of all the op-amps and reference are also decoupled to
A
GND
with 10μF tantalum and a 0.1μF ceramic capacitor. T he
AD7899 AV
DD
supply pin is decoupled to A
GND
with 47uF
tantalum and 0.1μF multilayer ceramic capacitors.
Extensive ground planes are used on this board to minimize
the effect of high frequency noise interference. T here are two
ground planes, A
GND
and D
GND
. T hese are connected at one
location close to the AD7899.
AD7899
ANALOG
SIGNAL
CONDITIONING
EXTERNAL
REFERENCE
D
ANALOG
INPUT
9
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| AD7899AR-1REEL7 | 制造商:Analog Devices 功能描述:ADC SGL SAR 400KSPS 14BIT PARALLEL 28SOIC W - Tape and Reel |
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| AD7899AR-2REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 400ksps 14-bit Parallel 28-Pin SOIC W T/R |
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