LM112 TI | Alldatasheet
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| | | LMi11Z, LM2Z12, LM312 , OPERATIONAL AMPLIFIERS/BUFFERS | | oO | | | D3304, AUGUST 1989 @® Input Bias Current ... 3nA Max Over Full | D, JG, OR P PACKAGE ; | Temperature Range for LM112, LM212 (TOP VIEW) @ Input Offset Current ... 400 pA Max Over , compi[l1 J sl compe | Full Temperature Range for LM112, LM212 IN-(]2 71) Voc, , @ Low Noise | | IN+L]3 6] | OUT Low Voc ~ 44 51] NC description , : , The LM112 series are micropower operational PACKAG " , (TOP VIEW) amplifiers with very low input-offset-voltage and input-offset-current errors — at least a factor of COMP2 ten better than FET amplifiers over the full military COMP1 Voc + temperature range of —55°C to 125°C. Similarto Ona the LM108 series, these devices use superbeta IN-{@) (6)) OUT transistors. Additionally, they include internal @) ~©/ - frequency compensation and provide for offset IN + @> NC a adjustments with a single potentiometer. , Voc — | These amplifiers will operate on supply voltage of NC — No internal connection _ 7 a +2 V to +20 V, drawing a quiescent current of Pin 4 of the L package is in ; only 300 pA. Performance is not appreciably electrical contact with the case.. affected over this range of voltages, so these a | | | devices can be easily operated from unregulated symbol , power sources. They can also be operated on a : single supply. , IN + —— OUT The LM112 series amplifiers include overvoltage oIN= : | : protection for the MOS compensation capacitor to : COMP? prevent failure caused by _ short-duration COMP1 , overvoltage spikes on the supplies. Unlike other , | internally-compensated amplifiers, these devices can be overcompensated with an external capacitor to increase the stability margin. The LM112 is characterized for operation over , the full military temperature range of —55°C to 125°C. The LM212 is characterized for operation 7 from -—40°C to 105°C, and the LM312 is , } characterized for operation from 0°C to 70°C. , , | AVAILABLE OPTIONS | Vin max | | . | (D) | (JG) (by (P) : | : | | The D package is available taped and reeled. Add the suffix R to the device type (e.g., LM312DR). PRODUCTION DATA documents contaln information .. Copyright © 1989, Texas Instruments Incorporated currant as of publication date. Products conform to a vi . i _ necaseatiiu include tastinn nf all narametars INSTRUMENTS | . POST OFFICE BOX 655303 » DALLAS, TEXAS 75265 |
LM112, LM212, LM312 _ | - OPERATIONAL AMPLIFIERS/BUFFERS , | TEXAS INSTR (LIN/INTFC) - , schematic COMP1 COMP2 - : r - Veo+ 2 pee | com | ee ye mG fae — ye Pr | OUT (waite -_ : ; ree" |_| low- Haat IN rs nn fae 16k ar ne | 20k 5 , - Qis Vr Q41 4.3k 3.3k — i , A8k 3200 3302} — | ; Ail resistor values shown are nominal and in ohms. , absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, Voc, (see Note 1): LM112, LM212 0.0... cece ee eee eee QOV Supply voltage, Vacq— (see Note 1): LM112, LM212 2... ccc cee eee cece eee nee 720 V Operating free-air temperature range, Ta: LM112 2.1... eee eee eee ee TOOT tO 125°C LM212 wo ccc eee eee ete tee cece eee ~49°C to 105°C LM312 00. ccc cee ce ete eet ec ees OFF tO 70°C © NOTES: 1. All voltage values, except differential voltages, are with respect to the midpoint between Voc, and Voc-. 7 2. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 V, whichever is less. 3. The inputs are shunted with shunt diodes for input overvoitage protection. Therefore, if a differential voltage in excess of 1 V . is applied between the inputs, excessive current will flow unless some limiting resistance is used. . 4. The output may be shorted to either supply. Temperature and/or supply voltages must be limited to ensure that the maximum dissipation rating is not exceeded. . . T te : INSTRUMENTS | | POST OFFICE BOX 655303 « DALLAS, TEXAS 75265 .
TFull range is —55°C to 125°C for the LM112, —40°C to 105°C for the LM212, and 0°C to 70°C for the LM312. . FIGURE 1. OFFSET BALANCING GREATER STABILITY MARGIN