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AD7767BRUZ-1 其他数据使用手册 - ADI（亚德诺）
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AD转换器
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TSSOP-16
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ANALOG DEVICES AD7767BRUZ-1 模数转换器, 24 bit, 64 kSPS, 单, 2.375 V, 2.625 V, TSSOP
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AD7767BRUZ-1数据手册
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24-Bit, 8.5 mW, 109 dB,
128 kSPS/64 kSPS/32 kSPS ADCs
AD7767
Rev. C
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 www.analog.com
Fax: 781.461.3113 ©2007–2010 Analog Devices, Inc. All rights reserved.
FEATURES
Oversampled successive approximation (SAR) architecture
High performance ac and dc accuracy, low power
115.5 dB dynamic range, 32 kSPS (AD7767-2)
112.5 dB dynamic range, 64 kSPS (AD7767-1)
109.5 dB dynamic range, 128 kSPS (AD7767)
−118 dB THD
Exceptionally low power
8.5 mW, 32 kSPS (AD7767-2)
10.5 mW, 64 kSPS (AD7767-1)
15 mW, 128 kSPS (AD7767)
High dc accuracy
24 bits, no missing codes (NMC)
INL: ±3 ppm (typical), ±7.6 ppm (maximum)
Low temperature drift
Zero error drift: 15 nV/°C
Gain error drift: 0.4 ppm/°C
On-chip low-pass FIR filter
Linear phase response
Pass-band ripple: ±0.005 dB
Stop-band attenuation: 100 dB
2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options
Flexible interfacing options
Synchronization of multiple devices
Daisy-chain capability
Power-down function
Temperature range: −40°C to +105°C
APPLICATIONS
Low power PCI/USB data acquisition systems
Low power wireless acquisition systems
Vibration analysis
Instrumentation
High precision medical acquisition
FUNCTIONAL BLOCK DIAGRAM
V
REF+
V
IN+
V
IN–
REFGND
AV
DD
AGND MCLK DV
DD
V
DRIVE
DGND
SUCCESSIVE
APPROXIMATION
ADC
DIGITAL
FIR FILTER
SERIAL INTERFACE
AND
CONTROL LOGIC
SCLK DRDY SDO SDI
AD7767/
AD7767-1/
AD7767-2
CS
SYNC/PD
06859-001
Figure 1.
GENERAL DESCRIPTION
The AD7767/AD7767-1/AD7767-2 are high performance,
24-bit, oversampled SAR analog-to-digital converters (ADCs).
The AD7767/AD7767-1/AD7767-2 combine the benefits of a
large dynamic range and input bandwidth, consuming 15 mW,
10.5 mW, and 8.5 mW power, respectively, and are contained in
a 16-lead TSSOP package.
Ideal for ultralow power data acquisition (such as PCI- and
USB-based systems), the AD7767/AD7767-1/AD7767-2
provide 24-bit resolution. The combination of exceptional SNR,
wide dynamic range, and outstanding dc accuracy make the
AD7767/AD7767-1/AD7767-2 ideally suited for measuring
small signal changes over a wide dynamic range. This is
particularly suitable for applications where small changes on the
input are measured on larger ac or dc signals. In such an
application, the AD7767/AD7767-1/AD7767-2 accurately
gather both ac and dc information.
The AD7767/AD7767-1/AD7767-2 include an on-board digital
filter (complete with linear phase response) that acts to elimi-
nate out-of-band noise by filtering the oversampled input
voltage. The oversampled architecture also reduces front-end
antialias requirements. Other features of the AD7767 include a
SYNC
/
PD
(synchronization/power-down) pin, allowing the
synchronization of multiple AD7767 devices. The addition of
an SDI pin provides the option of daisy chaining multiple
AD7767 devices.
The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply
using a 5 V reference. The devices operate from −40°C to +105°C.
RELATED DEVICES
Table 1. 24-Bit ADCs
Part No. Description
AD7760 2.5 MSPS, 100 dB dynamic range,
1
on-board differential
amp and reference buffer, parallel, variable decimation
AD7762/
AD7763
625 kSPS, 109 dB dynamic range,
1
on-board differential
amp and reference buffer, parallel/serial, variable
decimation
AD7764
312 kSPS, 109 dB dynamic range,
1
on-board differential
amp and reference buffer, variable decimation (pin)
AD7765
156 kSPS, 112 dB dynamic range,
1
on-board differential
amp and reference buffer, variable decimation (pin)
AD7766
128 kSPS, 109.5 dB,
1
15 mW, 16-bit INL, serial interface
AD7766-1
64 kSPS 112.5 dB,
1
10.5 mW, 16-bit INL, serial interface
AD7766-2
32 kSPS, 115.5 dB,
1
8.5 mW, 16-bit INL, serial interface
1
Dynamic range at maximum output data rate.
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