Datasheet LT1236 (Analog Devices) - 9

LT1236
U TYPICAL APPLICATIONS Boosted Output Current Boosted Output Current with No Current Limit with Current Limit
±
10V Output Reference
V+ ≥ (VOUT + 1.8V) V+ ≥ VOUT + 2.8V R1 D1* R1 LT1236-10 8.2Ω 220Ω LED 220Ω 15V V V +10V IN OUT 2N2905 2N2905 GND IN LT1236 IN COM 10V AT LT1236 OUT 100mA 10V AT LT1236-10 GND + OUT 2µF 100mA SOLID GND + V V 2µF IN OUT TANT SOLID TANT GND –10V LT1236 TA05 GLOWS IN CURRENT LIMIT, * –15V –10V ILOAD R1 = R1 DO NOT OMIT LT1236 TA06 ILOAD + 1.5mA –15V LT1236 TA17
Handling Higher Load Currents Operating 5V Reference from 5V Supply
15V 30mA 5V LOGIC SUPPLY 1N914 IN R1* CMOS LOGIC GATE** LT1236-5 169Ω 1N914 LT1236-10 + ≈8.5V 5V fIN ≥ 2kHz* IN OUT V + REFERENCE OUT OUT 10V C2* C1* GND GND 5µF 5µF R TYPICAL LOAD L CURRENT = 30mA FOR HIGHER FREQUENCIES C1 AND C2 MAY BE DECREASED * PARALLEL GATES FOR HIGHER REFERENCE CURRENT LOADING ** LT1236 TA15 SELECT R1 TO DELIVER TYPICAL LOAD CURRENT. * LT1236 WILL THEN SOURCE OR SINK AS NECESSARY TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD AS OUTPUT WILL BE DRIVEN UNREGULATED HIGH. LINE REGULATION IS DEGRADED IN THIS APPLICATION LT1236 TA07
Trimming 10V Units to 10.24V CMOS DAC with Low Drift Full-Scale Trimming**
LT1236-10 R3 OUT 4.02K V IN IN OUT VOUT = 10.24V 1% LT1236-10 R4* TRIM GND 100Ω TRIM FB FULL-SCALE GND R1 CMOS 30pF ADJUST 4.99k DAC IOUT – 4.32k 1% LTC7543 REF LT1007C 10V F.S. 5k R2 + 40.2Ω 1% V – = –15V* 1.2k TC LESS THAN 200ppm/ * °C *MUST BE WELL REGULATED NO ZERO ADJUST REQUIRED ** dVOUT 15mV = –15V WITH LT1007 (V LT1236 TA14 0S ≤ 60µV) dV – V LT1236 TA11 9