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參數(shù)資料
| 型號： | EVAL-AD7328CB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 8-Channel, Software-Selectable True Bipolar Input, 12-Bit Plus Sign ADC |
| 中文描述： | 8通道，軟件可選真雙極性輸入，12位ADC的加號 |
| 文件頁數(shù)： | 1/36頁 |
| 文件大?。?/td> | 496K |
| 代理商： | EVAL-AD7328CB |
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8-Channel, Software-Selectable True
Bipolar Input, 12-Bit Plus Sign ADC
AD7328
FEATURES
12-bit plus sign SAR ADC
True bipolar input ranges
Software-selectable input ranges
±10 V, ±5 V, ±2.5 V, 0 V to +10 V
1 MSPS throughput rate
Eight analog input channels with channel sequencer
Single-ended, true differential, and pseudo differential
analog input capability
High analog input impedance
Low power: 21 mW
Temperature indicator
Full power signal bandwidth: 22 MHz
Internal 2.5 V reference
High speed serial interface
Power-down modes
20-lead TSSOP package
i
CMOS
process technology
GENERAL DESCRIPTION
Rev. A
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
The AD7328
1
is an 8-channel, 12-bit plus sign, successive
approximation ADC designed on the
i
CMOS (industrial
CMOS) process.
i
CMOS is a process combining high voltage
silicon with submicron CMOS and complementary bipolar
technologies. It enables the development of a wide range of high
performance analog ICs capable of 33 V operation in a footprint
that no previous generation of high voltage parts could achieve.
Unlike analog ICs using conventional CMOS processes,
i
CMOS
components can accept bipolar input signals while providing
increased performance, dramatically reduced power consumption,
and reduced package size.
The AD7328 can accept true bipolar analog input signals. The
AD7328 has four software-selectable input ranges, ±10 V, ±5 V,
±2.5 V and 0 V to +10 V Each analog input channel can be
independently programmed to one of the four input ranges. The
analog input channels on the AD7328 can be programmed to be
single-ended, true differential, or pseudo differential.
The ADC contains a 2.5 V internal reference. The AD7328 also
allows for external reference operation. If a 3 V reference is applied
to the REFIN/OUT pin, the AD7328 can accept a true bipolar
±12 V analog input. Minimum ±12 V V
DD
and V
SS
supplies are
required for the ±12 V input range. The ADC has a high speed
serial interface that can operate at throughput rates up to 1 MSPS.
FUNCTIONAL BLOCK DIAGRAM
V
IN
0
V
IN
1
V
IN
2
V
IN
3
V
IN
4
V
IN
5
V
IN
6
V
IN
7
DOUT
SCLK
CS
DIN
V
DRIVE
V
DD
REFIN/OUT
V
CC
AGND
V
SS
DGND
CONTROL LOGIC
ASUADC
T/H
2.5V
I/P
SCHANNEL
AD7328
0
TINDICATOR
Figure 1.
PRODUCT HIGHLIGHTS
1.
The AD7328 can accept true bipolar analog input signals,
±10 V, ±5 V, ±2.5 V, and 0 V to +10 V unipolar signals.
2.
The eight analog inputs can be configured as eight single-
ended inputs, four true differential input pairs, four pseudo
differential inputs, or seven pseudo differential inputs.
3.
1 MSPS serial interface. SPI-/QSPI-/DSP-/MICROWIRE-
compatible interface.
4.
Low power, 30 mW, at a maximum throughput rate of
1 MSPS.
5.
Table 1. Similar Product Selection
Device
Number
Rate
AD7329
1000 kSPS
AD7327
500 kSPS
AD7324
1000 kSPS
AD7323
500 kSPS
AD7322
1000 kSPS
AD7321
500 kSPS
Channel sequencer.
Throughput
Number of Bits
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
Number of
Channels
8
8
4
4
2
2
1
Protected by U.S. Patent No. 6,731,232.
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