Purchase LM12H458, In-stock LM12H458 From SeekIC.
Part Number: LM12H458
Description: The LM12454, LM12458, and LM12H458 are highly integrated Data Acquisition Systems. Operating on just 5V, they combine a...
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LM12H458
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DataSheet
General Description
LM12H458 General Description
The LM12454, LM12458, and LM12H458 are highly integrated Data Acquisition Systems. Operating on just 5V, they combine a fully-differential self-calibrating (correcting linearity and zero errors) 13-bit (12-bit + sign) analog-to-digital converter (ADC) and sample-and-hold (S/H) with extensive analog functions and digital functionality. Up to 32 consecutive conversions, using two's complement format, can be stored in an internal 32-word (16-bit wide) FIFO data buffer. An internal 8-word RAM can store the conversion sequence for up to eight acquisitions through the LM12(H)458's eight-input multiplexer. The LM12454 has a four-channel multiplexer, a differential multiplexer output, and a differential S/H input. The LM12454 and LM12(H)458 can also operate with 8-bit + sign resolution and in a supervisory "watchdog" mode that compares an input signal against two programmable limits.
Programmable acquisition times and conversion rates are possible through the use of internal clock-driven timers. The reference voltage input can be externally generated for absolute or ratiometric operation or can be derived using the internal 2.5V bandgap reference.
All registers, RAM, and FIFO are directly addressable through the high speed microprocessor interface to either an 8-bit or 16-bit databus. The LM12454 and LM12(H)458 include a direct memory access (DMA) interface for high-speed conversion data transfer.
An evaluation/interface board is available. Order number LM12458EVAL.
Additional applications information can be found in applications notes AN-906, AN-947 and AN-949.
LM12H458 Maximum Ratings
Supply Voltage (VA+ and VD+) 6.0V
Voltage at Input and Output Pins
except IN0IN3 (LM12454) -0.3V to V+ + 0.3V
and IN0IN7 (LM12(H)458)
Voltage at Analog Inputs IN0IN3 (LM12454)
and IN0IN7 (LM12(H)458) GND - 5V to V+ + 5V
|VA+ - VD+| 300 mV
Input Current at Any Pin (Note 3) ±5 mA
Package Input Current (Note 3) ±20 mA
Power Dissipation (TA = 25)
V Package (Note 4) 875 mW
Storage Temperature -65 to +150
Lead Temperature
V Package, Infrared, 15 sec. +300
EL and W Packages,
Solder, 10 sec. +250
ESD Susceptibility (Note 5) 1.5 kV
LM12458MEL/883 2.0 kV
Voltage at Input and Output Pins
except IN0IN3 (LM12454) -0.3V to V+ + 0.3V
and IN0IN7 (LM12(H)458)
Voltage at Analog Inputs IN0IN3 (LM12454)
and IN0IN7 (LM12(H)458) GND - 5V to V+ + 5V
|VA+ - VD+| 300 mV
Input Current at Any Pin (Note 3) ±5 mA
Package Input Current (Note 3) ±20 mA
Power Dissipation (TA = 25)
V Package (Note 4) 875 mW
Storage Temperature -65 to +150
Lead Temperature
V Package, Infrared, 15 sec. +300
EL and W Packages,
Solder, 10 sec. +250
ESD Susceptibility (Note 5) 1.5 kV
LM12458MEL/883 2.0 kV
LM12H458 Features
`Three operating modes: 12-bit + sign, 8-bit + sign, and "watchdog"
`Single-ended or differential inputs
`Built-in Sample-and-Hold and 2.5V bandgap reference
`Instruction RAM and event sequencer
`8-channel (LM12(H)458), 4-channel (LM12454) multiplexer
`32-word conversion FIFO
`Programmable acquisition times and conversion rates
`Self-calibration and diagnostic mode
`8- or 16-bit wide databus dmicroprocessor or DSP interface
`Single-ended or differential inputs
`Built-in Sample-and-Hold and 2.5V bandgap reference
`Instruction RAM and event sequencer
`8-channel (LM12(H)458), 4-channel (LM12454) multiplexer
`32-word conversion FIFO
`Programmable acquisition times and conversion rates
`Self-calibration and diagnostic mode
`8- or 16-bit wide databus dmicroprocessor or DSP interface
LM12H458 Typical Application
·Data Logging
·Instrumentation
·Process Control
·Energy Management
·Inertial Guidance
·Instrumentation
·Process Control
·Energy Management
·Inertial Guidance
LM12H458 Connection Diagram
LM12H458
PDF/DataSheet Download
- Datasheet: LM12H458
- File Size: 1387897 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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