DATA SHEET
D
LND2907HT
10-Bit Successive Approximation Register Analog-to-
Digital Converter with Extended Temperature Range
GENERAL DESCRIPTION
The LND2907HT is a 10-bit Successive Approximation
Register (SAR) analog-to-digital converters (ADC)
which is designed to operate from a single-ended
supply of 3.3V and can withstand temperatures up to
200
o
C.
The LND2907HT provides a front-end interface for high
temperature sensor applications including LVDTs and
Resolvers.
The LND2907HT is built using a temperature insensitive
Digital-to-Analog Converter (DAC), Comparator,
Successive Approximation Register (SAR) and a
Sample and Hold circuit.
The analog input range to the SAR ADC can vary from
V
SS
to V
DD
. The ADC normally remains in a shutdown
mode, powering up only for the conversions. This
process of conversion is controlled by an external
command than comes from the processor and this
results in a lot of power saving.
All the bias voltages required for proper functioning of
various internal components are generated inside the
chip which eliminates the use of external voltage
references.
The LND2907HT provides a serial interface which is
compatible with SPI and hence makes it a good choice
of ADC for many applications.
The LND2907HT is available in a 14-pin DIP package,
and is specified over the temperature range of 27
o
C to
200
o
C.
FEATURES
•
Provides frond-end interface for
LVDTs and Resolvers
•
On-chip Bias Voltage References
•
Compatible with standard interfaces
like SPI
•
Operating temperature range of 27
o
C
to 200
o
C
•
Sampling Rate of 1MHz
•
Maximum power dissipation of 5 mW
under a supply voltage of 3.3V
•
14-pin (2mm × 3mm) DIP package
•
Guaranteed Monotonicity and Linearity
over temperature
APPLICATIONS
•
•
•
•
LVDT & Resolver Front-End Interface
Digital Signal Processing
Industrial Process Control
Battery Powered Systems
PRODUCT HIGHLIGHTS
•
•
•
Temperature insensitive operation up to
200
o
C Digital Signal Processing
SPI compatible serial interface
Bias voltages derived inside the chip
•
Linear Dimensions, Inc.
•
445 East Ohio Street, Chicago IL 60611 USA
•
tel 312.404.9283
•
fax 312.321.1830
•
•
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
