OP27 Analog Devices, OP27 Datasheet

Page 1

... GENERAL DESCRIPTION The OP27 precision operational amplifier combines the low offset and drift of the OP07 with both high speed and low noise. Offsets down to 25 µV and drift of 0.6 µV/°C maximum make the OP27 ideal for precision instrumentation applications. Exceptionally low noise 3.5 nV/√ ...

Page 2

... L ≥ 2 kΩ 1.7 2.8 L 5.0 8 140 O ± 4 kΩ P versus. Time over extended periods after the first 30 days of operation. Excluding the OS OP27F OP27C/G Min Typ Max Min Typ Max 100 0.3 1.5 0.4 2 ± 12 ± 55 ± 15 ± 80 ...

Page 3

... TCV P OP27C Max Min Typ Max 60 70 300 0 135 ± 60 ± 35 ± 150 ± 10.2 ± 11.5 94 118 300 800 ± 10.5 ± 13.0 is 100% tested for A/E grades, sample tested for OS OP27 Unit µV µV/° µV/V V/mV V ...

Page 4

... The TCV performance is within the specifications unnulled or when nulled with R OS C/F/G grades. 2 Guaranteed by design. = ±15 V, –25 C¯≤ T ≤ for OP27J, OP27Z ≤ OP27FP, and –40 C ≤ T ≤ for OP27GP, OP27GS, unless otherwise noted.) A OP27E Min ...

Page 5

... OP27 Unit µV Max nA Max nA Max V Min dB Min µV/V Max V/mV Min V/mV Min V Min V Min mW Max ...

Page 6

... OSn 1000 1000 np-p ≥ 2 kΩ unless otherwise noted.) A OP27N OP27G OP27GR Typical Typical Typical 0.2 0.3 0.4 80 130 180 100 160 200 3.5 3.5 3.8 3.1 3.1 3.3 3.0 3.0 3.2 1.7 1.7 1.7 1.0 1.0 1.0 0.4 0.4 0.4 0.08 0.08 0.09 2.8 2 ...

Page 7

... Operating Temperature Range OP27A, OP27C ( –55°C to +125°C OP27E, OP27F ( –25°C to +85°C OP27E, OP27F ( 0°C to 70°C OP27G ( –40°C to +85°C Lead Temperature Range (Soldering, 60 sec 300°C Junction Temperature . . . . . . . . . . . . . . . . . –65°C to +150° 25° ...

Page 8

... RESISTOR NOISE ONLY 1 100 1k 10k SOURCE RESISTANCE – 10.0 1.0 I/F CORNER = 140Hz 0.1 10 100 1k 10k FREQUENCY – Hz 100 741 I/F CORNER 10 I/F CORNER = LOW NOISE 2.7Hz AUDIO OP AMP OP27 I/F CORNER INSTRUMENTATION AUDIO RANGE RANGE 20kHz 100 1k FREQUENCY – 15V 10Hz 3 AT 1kHz 2 1 – ...

Page 9

... GBW 8 4 SLEW –75 –50 – 100 125 TEMPERATURE – C OP27 15V S 10 OP27 C/G OP27 F 5 OP27 A TIME AFTER POWER ON – Min 15V OP27C 10 OP27A 0 –75 –50 – ...

Page 10

... OP27 1.0 0 TOTAL SUPPLY VOLTAGE – V 100 V = 15V 100mV 500 1000 1500 2000 2500 CAPACITIVE LOAD – 15V (+) (– ...

Page 11

... Best operation will be obtained when both input contacts are main- tained at the same temperature. OFFSET VOLTAGE ADJUSTMENT The input offset voltage of the OP27 is trimmed at wafer level. However, if further adjustment necessary kΩ trim OS potentiometer can be used ...

Page 12

... The argument S can be made that current noise is not important for applica- tions with low to moderate source resistances. The crossover between the OP27, OP07, and OP08 noise occurs in the 15 kΩ kΩ region. 2.8V/ s Figure 5 shows the 0 peak-to-peak noise. Here the picture is less favorable ...

Page 13

... Ra 47.5k OP37 125 dB 125 dB The OP27 brings a 3.2 nV/√Hz voltage noise and 0.45 pA/√Hz 124 dB current noise to this circuit. To minimize noise from other sources set to a value of 100 Ω, which generates a voltage noise of 1.3 nV/√Hz. The noise increases the 3.2 nV/√Hz of the amplifier by only 0.7 dB. With a 1 kΩ source, the circuit noise measures 63 dB below reference level, unweighted kHz noise bandwidth ...

Page 14

... SOURCE Gain may be trimmed to other levels, if desired, by adjusting R2 or R1. Because of the low offset voltage of the OP27, the output offset of this circuit will be very low, 1 less, for gain. The typical output blocking capacitor can be eliminated in such cases, but is desirable for higher gains to eliminate switch- ing transients. Capacitor C2 and resistor R2 form a 2 µ ...

Page 15

... Any practical amplifier can only approach this noise level; it can never exceed it. With the OP27 and T1 specified, the additional noise degradation will be close to 3.6 dB (or –69.5 refer- enced to 1 mV). ...

Page 16

Revision History Location 9/01—Data Sheet changed from REV REV. A. Edits to ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . ...