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| 型號： | AD7732BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 2-Channel, +-10 V Input Range, High Throughput, 24-Bit SIGMA- ADC |
| 中文描述： | 2-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28 |
| 封裝： | MO-153AE, TSSOP-28 |
| 文件頁數(shù)： | 1/32頁 |
| 文件大小： | 1576K |
| 代理商： | AD7732BRU |
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2-Channel, ±10 V Input Range, High
Throughput, 24-Bit ∑- ADC
AD7732
FEATURES
High resolution ADC
24 bits no missing codes
±0.0015% nonlinearity
Optimized for fast channel switching
18-bit p-p resolution (21 bits effective) at 500 Hz
16-bit p-p resolution (19 bits effective) at 2 kHz
14-bit p-p resolution (18 bits effective) at 15 kHz
On-chip per channel system calibration
2 fully differential analog inputs
Input ranges +5 V, ±5 V, +10 V, ±10 V
Overvoltage tolerant
Up to ±16.5 V not affecting adjacent channel
Up to ±50 V absolute maximum
3-wire serial interface
SPI, QSPI, MICROWIRE, and DSP compatible
Schmitt trigger on logic inputs
Single-supply operation
5 V analog supply
3 V or 5 V digital supply
Package: 28-lead TSSOP
APPLICATIONS
PLCs/DCS
Multiplexing applications
Process control
Industrial instrumentation
GENERAL DESCRIPTION
The AD7732 is a high precision, high throughput analog front
end. True 16-bit p-p resolution is achievable with a total
conversion time of 500 μs (2 kHz channel switching), making it
ideally suitable for high resolution multiplexing applications.
The part can be configured via a simple digital interface, which
allows users to balance the noise performance against data
throughput up to a 15.4 kHz.
The analog front end features two fully differential input
channels with unipolar or true bipolar input ranges to ±10 V
while operating from a single +5 V analog supply. The part has
an overrange and underrange detection capability and accepts
an analog input overvoltage to ±16.5 V without degrading the
performance of the adjacent channels.
FUNCTIONAL BLOCK DIAGRAM
P0
SYNC/P1
AIN0(+)
AIN1(+)
AIN0(–)
AIN1(–)
SCLK
DIN
DOUT
CS
RESET
RDY
DGND
MCLKIN
MCLKOUT
AGND AV
DD
DV
DD
BUFFER
REFERENCE
DETECT
REFIN(–)
REFIN(+)
AD7732
24-BIT
Σ
ADC
SERIAL
INTERFACE
CONTROL
LOGIC
CLOCK
GENERATOR
CALIBRATION
CIRCUITRY
I/O PORT
MUX
Figure 1.
The differential reference input features “No-Reference” detect
capability. The ADC also supports per channel system
calibration options. The digital serial interface can be
configured for 3-wire operation and is compatible with
microcontrollers and digital signal processors. All interface
inputs are Schmitt triggered.
The part is specified for operation over the extended industrial
temperature range of –40°C to +105°C.
Other parts in the AD7732 family are the AD7734 and
the AD7738.
The AD7734 is similar to AD7732, but its analog front end
features four single-ended input channels.
The AD7738 analog front end is configurable for four fully
differential or eight single-ended input channels, features
0.625 V to 2.5 V bipolar/unipolar input ranges, and accepts a
common-mode input voltage from 200 mV to AVDD – 300 mV.
The AD7738 multiplexer output is pinned out externally,
allowing the user to implement programmable gain or signal
conditioning before being applied to the ADC.
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 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 companies.
Tel: 781.329.4700Fax: 781.326.8703
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