Manuale d’uso / di manutenzione del prodotto AD600 del fabbricante Analog Devices
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REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
AD600J/AD602J AD600A/AD602A Parameter Conditions Min Typ Max Min Typ Max Units INPUT CHARACTERISTICS Input Resistance Pins 2 to 3; Pins 6 to 7 98 100 102 95 100 105 Ω Input Capacitance 22 p F Input Noise Spectral Density 1 1.4 1.4 nV/ √ Hz Noise Figure R S = 50 Ω , Maximum Gain 5.
AD600/AD602 REV. A –3– ABSOLUTE MAXIMUM RATINGS 1 Supply Voltage ± V S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 7.5 V Input Voltages Pins 1, 8, 9, 16 . . . . . . . . . . . . . . . . . . . . . . . . . . .
AD600/AD602 REV. A –4– THEORY OF OPERATION The AD600 and AD602 have the same general design and fea- tures. They comprise two fixed gain amplifiers, each preceded by a voltage-controlled attenuator of 0 dB to 42.14 dB with in- dependent control interfaces, each having a scaling factor of 32 dB per volt.
AD600/AD602 REV. A –5– The Gain-Control Interface The attenuation is controlled through a differential, high imped- ance (15 M Ω ) input, with a scaling factor which is laser trimmed to 32 dB per volt, that is, 31.25 mV/dB. Each of the two amplifiers has its own control interface.
AD600/AD602 REV. A –6– 41.07dB –40.00dB C1HI C1LO V = 0.592V O1 1.07dB 41.07dB –42.14dB C1HI C1LO V = 1.908V O2 V G1 V G2 OUTPUT 0dB –41.07dB –40.00dB INPUT 0dB V = 0V C 41.07dB –0.51dB C1HI C1LO V = 0.592V O1 40.56dB 41.07dB –41.63dB C1HI C1LO V = 1.
AD600/AD602 REV. A –7– 90 –10 3.0 20 0 0.0 10 –0.5 50 30 40 60 70 80 2.5 2.0 1.5 1.0 0.5 V C OVERALL GAIN – dB A1 COMBINED A2 Figure 5. Plot of Separate and Overall Gains in Sequential Control 5 –8 3.0 –5 –7 0.0 –6 –0.5 –2 –4 –3 –1 1 2 4 3 0 2.
AD600/AD602 REV. A –8– APPLICATIONS The full potential of any high performance amplifier can only be realized by careful attention to details in its applications. The following pages describe fully tested circuits in which many such details have already been considered.
AD600/AD602 REV. A –9– 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 REF A1 A2 C1HI A1CM A1OP VPOS VNEG A2OP A2CM C2HI C1LO A1HI A1LO GAT1 GAT2 A2LO A2HI C2LO V IN +5V 100 Ω –5V AD600 or AD602 100 Ω 50 Ω V OUT GAIN-CONTROL VOLTAGE V G Figure 13.
AD600/AD602 REV. A –10– 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 REF A1 A2 C1HI A1CM A1OP VPOS VNEG A2OP A2CM C2HI C1LO A1HI A1LO GAT1 GAT2 A2LO A2HI C2LO V ' G C1 100pF C4 0.1 µ F R3 46.4k Ω R4 3.74k Ω R1 100 Ω AD600 +5V DEC –5V DEC RF INPUT AD590 R2 806 Ω 1% C3 15pF 300 µ A (at 300K) Q1 2N3904 V PTAT RF OUTPUT 0.
AD600/AD602 REV. A –11– The emitter circuit of Q1 is somewhat inductive (due its finite f t and base resistance). Consequently, the effective value of R2 in- creases with frequency.
AD600/AD602 REV. A –12– INPUT 1V RMS MAX (SINE WAVE) 0.1 µ F 0.1 µ F FB –6V +6V POWER SUPPLY DECOUPLING NETWORK +6V DEC –6V DEC 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 REF A1 A2 C1HI A1CM A1OP VPOS VNEG A2OP A2CM C2HI C1LO A1HI A1LO GAT1 GAT2 A2LO A2HI C2LO R3 133k Ω R2 200 Ω U1 AD600 +6V DEC –6V DEC C2 2 µ F C1 0.
AD600/AD602 REV. A –13– (This system can, of course, be used as an AGC amplifier, in which the rms value of the input is leveled.) Figure 21 shows the “decibel” output voltage.
AD600/AD602 REV. A –14– 100 dB to 120 dB RMS Responding Constant Bandwidth AGC Systems with High Accuracy dB Outputs The next two applications double as both AGC amplifiers and measurement systems. In both, precise gain offsets are used to achieve either (1) a very high gain linearity of ± 0.
AD600/AD602 REV. A –15– 2.0 –2.0 1 µ V1 0 µ V 10V 1V 100mV 10mV 1mV 100 µ V 0.5 1.0 1.5 –1.5 –1.0 –0.5 GAIN ERROR – dB INPUT SIGNAL – V RMS –0.1 0.1 0 Figure 27. Gain Error for Figure 25 Without the 2 dB Offset Modification 2.0 0 –2.
AD600/AD602 REV. A –16– 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 REF A1 A2 C1HI A1CM A1OP VPOS VNEG A2OP A2CM C2HI C1LO A1HI A1LO GAT1 GAT2 A2LO A2HI C2LO U1 AD600 +6V DEC –6V DEC U3A 1/4 AD713 R2 100 Ω V OUT C1 0.1 µ F U3B 1/4 AD713 R1 133k Ω C2 0.
AD600/AD602 REV. A –17– 2.0 0 –2.0 1 µ V1 0 µ V 10V 1V 100mV 10mV 1mV 100 µ V 0.5 1.0 1.5 –1.5 –1.0 –0.5 INPUT SIGNAL – V RMS GAIN ERROR – dB 0.
AD600/AD602–T ypical Performance Characteristics 0.45 –0.45 0.7 –0.25 –0.35 –0.5 –0.7 –0.05 –0.15 0.05 0.15 0.25 0.35 0.5 0.3 0.1 –0.1 –0.3 GAIN CONTROL VOLTAGE – Volts GAIN ERROR – dB Figure 35. Gain Error vs. Gain Control Voltage 10.
AD600/AD602 10 90 100 0% 50mV 5V 100nS OUTPUT INPUT Figure 44. Gating Feedthrough to Output, Gating Off to On 10 90 100 0% 500mV 1V 200nS OUTPUT INPUT Figure 47.
AD600/AD602 REV. A –20– OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Pin Plastic DIP (N-16) Package 0.125 (3.18) MIN 0.035 (0.89) 0.18 (4.57) 0.3 (7.62) 0.87 (22.1) MAX 0.25 (6.35) 0.31 (7.87) 0.18(4.57) MAX 0.011 (0.28) 18 9 16 0.018 (0.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Analog Devices AD600 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Analog Devices AD600 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Analog Devices AD600 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Analog Devices AD600 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Analog Devices AD600, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Analog Devices AD600.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Analog Devices AD600. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Analog Devices AD600 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
