Datasheet
Package Availability, Models, Samples & Pricing
| Obsolete Part | Alternate Part or
Supplier | Source | Last Time Buy Date |
LM2907MX-8EP
| NONE
| NATIONAL SEMICONDUCTOR
| 16 Nov 2008
|
General Description
The LM2907, LM2917 series are monolithic frequency to voltage converters with a high gain op amp/comparator designed to operate
a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump
technique and offers frequency doubling for low ripple, full input protection in two versions (LM2907-8, LM2917-8) and its
output swings to ground for a zero frequency input.
The op amp/comparator is fully compatible with the tachometer and has a floating transistor as its output. This feature allows
either a ground or supply referred load of up to 50 mA. The collector may be taken above VCC up to a maximum VCE of 28V.
The two basic configurations offered include an 8-pin device with a
ground referenced tachometer input and an internal connection between the tachometer output and the op amp non-inverting input. This version is well
suited for single speed or frequency switching or fully buffered frequency to voltage conversion applications.
The more versatile configurations provide differential tachometer input and uncommitted op amp inputs. With this version the
tachometer input may be floated and the op amp becomes suitable for active filter conditioning of the tachometer output.
Both of these configurations are available with an active shunt regulator connected across the power leads. The regulator
clamps the supply such that stable frequency to voltage and frequency to current operations are possible with any supply voltage
and a suitable resistor.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM2907M | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM2907M-8 | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM2907MX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM2907MX-8 | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM2907N | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM2907N-8 | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
More Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-97: Application Note 97 Versatile Timer Operates from Microseconds to Hours |
457
Kbytes |
24-Feb-99 |
Download |
| AN-162: AN-162 LM2907 Tachometer/Speed Switch Building Block Applications |
309
Kbytes |
1-May-04 |
Download |
| AN-607: Pulse Width Modulation A/D Conversion Techniques with COP800 Family Microcontrollers |
148
Kbytes |
5-Aug-95 |
Download |
| AN-1237: Application Note 1237 RSDS™ Flat Panel Display Design Guidelines Part 2 |
141
Kbytes |
14-May-03 |
Download |
[Information as of 8-Nov-2009]
| 
RoHS Compliance Information
