AD602 AD [Analog Devices], AD602 Datasheet
AD602
Available stocks
Related parts for AD602
AD602 Summary of contents
Page 1
... Each indepen- dent channel provides a gain + the AD600 and – + the AD602. The lower gain of the AD602 results in an improved signal-to-noise ratio at the out- put. However, both products have the same 1.4 nV/ Hz input noise spectral density ...
Page 2
... The dc gain of the main amplifier in the AD600 is X113; thus an input offset of only 100 V becomes an 11.3 mV output offset. In the AD602, the amplifier’s gain is X35.7; thus, an input offset of 100 V becomes a 3.57 mV output offset. Specifications shown in boldface are tested on all production units at final electrical test Results from those tests are used to calculate outgoing quality levels. All min and max specifications guaranteed, although only those shown in boldface are tested on all production units ...
Page 3
... C to +150 C Q-16 NOTES Plastic DIP; Q= Cerdip; R= Small Outline IC (SOIC). 2 Refer to AD600/AD602 Military data sheet. Also available as 5962-9457201MPA. 3 Refer to AD600/AD602 Military data sheet. Also available as 5962-9457202MPA. CAUTION ESD (electrostatic discharge) sensitive device. Permanent damage may occur on unconnected devices subject to high energy electrostatic fields. Unused devices must be stored in conductive foam or shunts ...
Page 4
... Hz, or 158 nV/ Hz. Thus MHz band- width, the output S/N ratio would be 76 dB. The input NSD of the AD600 and AD602 are the same, but because of the 10 dB lower gain in the AD602’s fixed amplifier, its output S/N ratio better MHz bandwidth. ...
Page 5
... There are several options in connecting the gain-control inputs. The choice depends on the desired signal-to-noise ratio (SNR) and gain error (output ripple). The following examples feature the AD600; the arguments generally apply to the AD602, with appropriate changes to the gain values. Sequential Mode (Maximum S/N Ratio) ...
Page 6
... AD600/AD602 INPUT –40.00dB 0dB C1HI INPUT –0.51dB 0dB C1HI V = 1.25V C 0dB INPUT 0dB C1HI V = 25V C Figure 3. AD600 Gain Control Input Calculations for Sequential Control Operation The gains are offset (Figure 4) such that A2’s gain is increased only after A1’s gain has reached its maximum value. Note that for a differential input of – ...
Page 7
... 2.0 2.5 3.0 0.0 Figure 8. SNR for Cascaded Stages—Parallel Control 1.2 1.0 0.8 0.6 0.4 0.2 0.0 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 2.0 2.5 3.0 Figure 9. Gain Error for Cascaded Stages—Low Ripple Mode 0.8 1.0 1.2 0.0 Figure 10. ISNR vs. Control Voltage—Low Ripple Mode –7– AD600/AD602 0.2 0.4 0.6 0.8 1.0 1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0.6 0.8 1.0 1.2 0.2 0 1.4 1.1 1.2 1.3 1.4 ...
Page 8
... Larger gain ranges can be accommodated by cascading amplifi- ers. Combinations built by cascading two amplifiers include – +60 dB (using one AD602), – + AD602 followed by 1 AD600), and (one AD600). In multiple-channel applications, extra protection against oscillations can be provided by using amplifier sections from different packages ...
Page 9
... X-AMP. High gain cannot be tolerated, because the peak transducer signal is typically 0.5 V, while the peak input capability of the AD600 or AD602 is only slightly more than gain of two is a suitable choice. It can be shown that if the preamplifier’s overall referred-to-input (RTI) noise the same as that due to the X-AMP alone (1 ...
Page 10
... AD600/AD602 +5V R3 46.4k R4 3.74k RF C1LO 1 INPUT A1HI 2 A1 A1LO 3 GAT1 4 REF GAT2 5 A2LO 6 A2 A2HI 7 C2LO 8 AD600 Figure 15. This Accurate HF AGC Amplifier Uses Just Three Active Components A simple half-wave detector is used, based on Q1 and R2. The average current into capacitor C2 is just the difference between the current provided by the AD590 (300 A at 300 and the collector current of Q1 ...
Page 11
... V per decade, which simplifies the interpretation of the reading when using a DVM, and is arranged to be –4 V for an input of 100 V rms input, zero for 10 mV, and +4 V for rms input. In terms of Equation SCALE –11– AD600/AD602 +5V 300 A AD590 (at 300K ...
Page 12
... AD600/AD602 INPUT 1V RMS MAX C1LO R1 1 (SINE WAVE) 115 A1HI 2 R2 200 A1LO 3 GAT1 4 GAT2 R3 5 133k A2LO 6 A2HI 7 C2LO U3A 8 U1 AD600 1/2 AD712 V G 15.625mV/dB R4 3.01k Figure 19. The Output of This Three-IC Circuit Is Proportional to the Decibel Value of the RMS Input Note that the peak “log output” requires the use supplies for the dual op amp U3 (AD712) although lower supplies would suffice for the AD600 and AD636 ...
Page 13
... Very low errors can then be maintained over a 100 dB range. 2.5 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 –2.5 100mV 1V 10V 10 V Figure 24. Using the 3 dB Offset Network, the Ripple Is Reduced –13– AD600/AD602 is not affected by the changes in the SCALE C1HI 1 16 VINP A1CM –6V 14 A1OP 3 VNEG DEC VPOS 13 +6V DEC ...
Page 14
... AD600/AD602 INPUT 1V RMS MAX C1LO C1HI 1 (SINE WAVE) 16 A1HI A1CM A1LO A1OP 3 14 GAT1 VPOS 4 13 REF GAT2 VNEG 12 5 A2LO A2OP A2HI A2CM 7 10 C2LO C2HI AD600 +5V FB 0.1 F +5V DEC –5V DEC 0 –5V POWER SUPPLY DECOUPLING NETWORK ...
Page 15
... X-AMP, with the sequence of gain increase being U1A first, then U1B, and lastly U2A. The adjust- able attenuator provided R17 and the 100 –15– AD600/AD602 is generated at Pin 8 of the AD636; the LOG LOG required to set its LOG is nominally 2 ...
Page 16
... AD600/AD602 C1LO C1HI 1 16 A1CM A1HI A1LO A1OP 3 14 GAT1 VPOS 4 13 REF GAT2 VNEG 5 12 A2LO A2OP A2HI A2CM 7 10 C2LO C2HI AD600 R3 R17 INPUT 200 115 +6V DEC R15 5.11k R13 R14 866 7.32k Figure 29. 120 dB Dynamic Range RMS Responding Circuit Optimized for S/N Ratio ...
Page 17
... In fact, the bandwidth of the circuit shown in Figure 25 was specifically chosen improve measurement accuracy by altering the shape of the log error curve (Figure 31) at low signal levels. –17– AD600/AD602 –0.558 0.067 0.692 1.317 1.942 2 ...
Page 18
... GAIN CONTROL VOLTAGE – Volts Figure 42. Output Offset vs. Gain Control Voltage (Control Channel Feedthrough) –18– 10dB 7dB 0 –45 –90 100k 1M 100M FREQUENCY – Hz Figure 37. AD602 Frequency and Phase Response vs. Gain –1.0 –1.2 –1.4 –1.6 –1.8 –2.0 –2.2 –2.4 –2.6 –2.8 –3.0 –3.2 – ...
Page 19
... INPUT 200mV 500nS Figure 48. Output Stage Overload Recovery Time +20 +10 0 AD600 –10 –20 –30 AD602 –40 –50 AD600: G=40dB AD602: G=30dB –60 BOTH: R =500 L V =0V IN –70 R =50 S –80 100k 1M 10M 100M FREQUENCY – Hz Figure 51. PSRR vs. Frequency –19– AD600/AD602 ...
Page 20
... AD600/AD602 0.18 (4.57) 0.299 (7.60) 0.012 (0.3) 0.200 (5.08) 0.125 (3.18) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Pin Plastic DIP (N-16) Package 16 9 0.25 0.31 (6.35) (7.87 0.87 (22.1) MAX 0.035 (0.89) 0.125 (3.18) MIN 0.018 (0.46) 0.033 (0.84) 0.1 (2.54) 16-Pin SOIC (R-16) Package 16 9 0.419 (10.65 0.413 (10.50) 0.030 (0.75) 0.104 (2.65) 0.05 (1.27) 0.019 0.013 (0.49) REF (0.32) 16-Pin Cerdip (Q-16) Package 0.005 (0.13) MIN 0.080 (2.03) MAX ...