Texas Instruments ADS7861 Handleiding
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Dual, 500kSPS, 12-Bit, 2 + 2 Channel,
Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
●4 INPUT CHANNELS
●FULLY DIFFERENTIAL INPUTS
●2
µs TOTAL THROUGHPUT PER CHANNEL
●NO MISSING CODES
●1MHz EFFECTIVE SAMPLING RATE
●LOW POWER: 40mW
●SSI SERIAL INTERFACE
●OPERATING TEMPERATURE RANGE:
–40
°C to +125°C
APPLICATIONS
●MOTOR CONTROL
●MULTI-AXIS POSITIONING SYSTEMS
●3-PHASE POWER CONTROL
DESCRIPTION
The ADS7861 is a dual, 12-bit, 500kSPS, Analog-to-Digital
(A/D) converter with four fully differential input channels
grouped into two pairs for high speed, simultaneous signal
acquisition. Inputs to the sample-and-hold amplifiers are fully
differential and are maintained differential to the input of the
A/D converter. This provides excellent common-mode rejec-
tion of 80dB at 50kHz which is important in high noise
environments.
The ADS7861 offers a high-speed, dual serial interface and
control inputs to minimize software overhead. The output data
for each channel is available as a 12-bit word. The ADS7861
is offered in both an SSOP-24 and a QFN-32 package and is
fully specified over the –40°C to +125°C operating range.
SAR
Serial
Interface
COMP
CLOCK
A0
M1
M0
CONVST
CS
RD
BUSY
SERIAL DATA B
SERIAL DATA A
CDAC
Internal
2.5V
Reference
SHA
CH A0–
CH A0+
REF
IN
CH A1–
CH A1+
SAR
COMP
CDAC
SHA
CH B0–
CH B0+
CH B1–
CH B1+
REF
OUT
ADS7861
SBAS110D – DECEMBER 1998 – REVISED AUGUST 2007
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1998-2007, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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All trademarks are the property of their respective owners.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS7861 |
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