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TSA7887ARZ-REEL Scheda tecnica(PDF) 1 Page - Silicon Laboratories

Il numero della parte TSA7887ARZ-REEL
Spiegazioni elettronici  A Micropower, 2-channel, 125-ksps, Serial-Output 12-bit SAR ADC
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Produttore elettronici  SILABS [Silicon Laboratories]
Homepage  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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TSA7887
Page 1
© 2014 Silicon Laboratories, Inc. All rights reserved.
FEATURES
 Alternate Source for AD7887
 Single-supply Operation: +2.7V to +5.25V
 INL: ±1LSB - TSA7887B
±2LSBs - TSA7887A
 One or Two Single-ended Analog Inputs
 Internal Wide-bandwidth Track-and-Hold
 Internal +2.5-V Reference
 Flexible Power/Throughput-Rate Management
0.85mA at 125ksps (Internal VREF ON)
0.7mA at 125ksps (Internal VREF OFF)
 Shutdown-mode Supply Current: 1
μA (max)
 SPI®/QSPI™/MICROWIRE™/DSP-Compatible
Serial Interfaces1
 Operating Temperature Range:
-40ºC to +125ºC
 8-pin SOIC and MSOP Packaging
APPLICATIONS
Instrumentation and Control Systems
High-Speed Modems
Battery-powered systems:
Personal Digital Assistants, Medical
Instruments, Mobile Communications
1 SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National
Semiconductor Corporation
DESCRIPTION
The TSA7887 – an alternate source for the AD7887 -
is
a
self-contained,
2-channel,
high-speed,
micropower, 12-bit analog-to-digital converter (ADC)
that operates from a single +2.7V to +5.25V power
supply. The TSA7887 is capable of a 125-ksps
throughput rate with an external 2MHz serial clock
and draws 0.85mA supply current.
The wideband input track-and-hold acquires signals
in 500ns and features a single-ended sampling
topology. Output data coding is straight binary and
the ADC is capable of converting full power signals
up to 2.5 MHz. The ADC also contains an integrated
2.5V reference or the VREF pin can be overdriven by
an external reference.
The TSA7887’s provides one or two analog inputs
each with an analog input range from 0 to VREF. In
two-channel operation, the analog input range is 0V
to VDD. Efficient circuit design ensures low power
consumption of 2mW (typical) for normal operation
and 3
μW in power-down operation.
The TSA7887 is fully specified from -40ºC to +125ºC
and is available in 8-pin SOIC and MSOP packages.
A Micropower, 2-channel, 125-ksps, Serial-Output 12-bit SAR ADC
FUNCTIONAL BLOCK DIAGRAM


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