Analog DevicesメーカーAD602の使用説明書/サービス説明書
ページ先へ移動 of 20
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.
デバイスAnalog Devices AD602の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Analog Devices AD602をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはAnalog Devices AD602の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Analog Devices AD602の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Analog Devices AD602で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Analog Devices AD602を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はAnalog Devices AD602の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Analog Devices AD602に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちAnalog Devices AD602デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
