x96012 Intersil Corporation, x96012 Datasheet - Page 8

• Manufacturer Part Number: x96012
• Description: Universal Sensor Conditioner With Dual Look Up Table Memory And Dacs
• Manufacturer: Intersil Corporation

Intersil Sensor Conditioner Product Family
DEVICE
X96010 Sensor Conditioner
X96012 Universal Sensor
X96011 Temperature Sensor
Device Description
The X96012 combines two Programmable Current
Generators, and integrated EEPROM with Block Lock™
protection, in one package. The combination of the X96012
functionality and Intersil’s QFN package lowers system cost,
increases reliability, and reduces board space requirements.
Two on-chip Programmable Current Generators may be
independently programmed to either sink or source current.
The maximum current generated is determined by using an
externally connected programming resistor, or by selecting
one of three predefined values. Both current generators
have a maximum output of ±3.2 mA, and may be controlled
to an absolute resolution of 0.39% (256 steps/8-bit).
Both current generators may be driven using an on-board
temperature sensor, an external sensor, or Control
Registers. The internal temperature sensor operates over a
very broad temperature range (-40
sensor output (internal or external) drives an 8-bit A/D
converter. The six MSBs of the ADC output select one of
64 bytes from each nonvolatile look-up table (LUT).
The contents of the selected LUT row (8-bit wide) drives the
input of an 8-bit D/A converter, which generates the output
current.
All control and set-up parameters of the X96012, including
the look-up tables, are programmable via the 2-wire serial
port.
The general purpose memory portion of the device is a
CMOS serial EEPROM array with Intersil’s Block Lock
protection.
The EEPROM array is internally organized as 272x8 bits
with 16-Byte pages, and utilizes Intersil’s proprietary Direct
Write
Page Write cycles and a minimum data retention of 100
years.
TM
with Dual Look-Up
Table Memory and
DACs
with Look-Up Table
Memory and DAC
Conditioner with
Dual Look-Up Table
Memory and DACs
cells, providing a minimum endurance of 100,000
TITLE
TEMPERATURE
8
INTERNAL
SENSOR
Yes
Yes
No
°
C to +100
EXTERNAL
°
SENSOR
C). The
INPUT
Yes
Yes
No
FSO = Full Scale Output, Ext = External, Int = Internal.
TM
REFERENCE
INTERNAL
VOLTAGE
X96012
Yes
Yes
Yes
FEATURES/FUNCTIONS
Principles of Operation
Control And Status Registers
The Control and Status Registers provide the user with a
mechanism for changing and reading the value of various
parameters of the X96012. The X96012 contains seven
Control, one Status, and several Reserved registers, each
being one Byte wide (see Figure 4). The Control registers
0 through 6 are located at memory addresses 80h through
86h respectively. The Status register is at memory address
87h, and the Reserved registers at memory address 88h
through 8Fh.
All bits in Control register 6 always power-up to the logic
state “0”. All bits in Control registers 0 through 5 power-up to
the logic state value kept in their corresponding nonvolatile
memory cells. The nonvolatile bits of a register retain their
stored values even when the X96012 is powered down, then
powered back up. The nonvolatile bits in Control 0 through
Control 5 registers are all preprogrammed to the logic state
“0” at the factory.
Bits indicated as “Reserved” are ignored when read, and
must be written as “0”, if any Write operation is performed to
their registers.
A detailed description of the function of each of the Control
and Status register bits follows:
Control Register 0
This register is accessed by performing a Read or Write
operation to address 80h of memory.
BL1, BL0: BLOCK LOCK PROTECTION BITS
(NON-VOLATILE)
These two bits are used to inhibit any write operation to
certain addresses within the memory array. The protected
region of memory is determined by the values of the two bits,
as shown Table 1.
VREF
Yes
Yes
I/O
No
GENERAL
PURPOSE
EEPROM
Yes
No
No
ORGANIZATION
Single Bank
LOOK-UP
Dual Bank
Dual Bank
TABLE
DACS
Single
# OF
Dual
Dual
November 19, 2007
RESISTORS
CURRENT
SETTING
Ext/Int
DAC
FSO
FN8216.2
Ext
Int