AD602AR-REEL Analog Devices Inc, AD602AR-REEL Datasheet
AD602AR-REEL
Specifications of AD602AR-REEL
Related parts for AD602AR-REEL
AD602AR-REEL Summary of contents
Page 1
FEATURES 2 channels with independent gain control Linear in dB gain response 2 gain ranges AD600 AD602: – +30 dB Accurate absolute gain: ±0.3 dB Low input noise: 1.4 nV/√Hz Low distortion: −60 ...
Page 2
AD600/AD602 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ...
Page 3
SPECIFICATIONS Each amplifier section 25° Specifications for the AD600/AD602 are identical, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Input Resistance Input Capacitance 2 Input Noise Spectral Density Noise Figure Common-Mode Rejection Ratio OUTPUT ...
Page 4
AD600/AD602 Parameter SIGNAL GATING INTERFACE Logic Input LO (Output On) Logic Input HI (Output Off ) Response Time Input Resistance Output Gated Off Output Offset Voltage Output Noise Spectral Density Signal Feedthrough @ 1 MHz AD600 AD602 POWER SUPPLY Specified ...
Page 5
ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage ±V S Input Voltages Pin 1, Pin 8, Pin 9, Pin 16 Pin 2, Pin 3, Pin 6, Pin 7 Pin 4, Pin 5 Internal Power Dissipation Operating Temperature Range J Grade ...
Page 6
AD600/AD602 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 C1LO CH1 Gain-Control Input LO (Positive Voltage Reduces CH1 Gain) 2 A1HI CH1 Signal Input HI (Positive Voltage Increases CH1 Output) 3 A1LO CH1 ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS 0.45 0.35 0.25 0.15 0.05 –0.05 –0.15 –0.25 –0.35 –0.45 –0.7 –0.5 –0.3 –0.1 0.1 GAIN CONTROL VOLTAGE (V) Figure 3. Gain Error vs. Gain Control Voltage 20dB 17dB 0° –45° –90° 100k 1M FREQUENCY (Hz) Figure ...
Page 8
AD600/AD602 102 101 GAIN = 40dB 100 99 GAIN = 20dB 98 97 GAIN = 0dB 100k 1M FREQUENCY (Hz) Figure 9. Input Impedance vs. Frequency AD600 3 2 AD602 1 0 ...
Page 9
Figure 15. Input Stage Overload Recovery Time 1V 100 200mV 500ns Figure 16. Output Stage Overload Recovery Time 500mV 100 500ns Figure 17. Transient Response Minimum ...
Page 10
AD600/AD602 THEORY OF OPERATION The AD600/AD602 have the same general design and features. They comprise two fixed gain amplifiers, each preceded by a voltage-controlled attenuator 42.14 dB with independent control interfaces, each having a scaling factor ...
Page 11
It is apparent from the foregoing that it is essential to use a low resistance in the design of the ladder network to achieve low noise. In some applications, this can be inconvenient, requiring the use of an external buffer ...
Page 12
AD600/AD602 ACHIEVING 80 dB GAIN RANGE The two amplifier sections of the X-AMP can be connected in series to achieve higher gain. In this mode, the output of A1 (A1OP and A1CM) drives the input of A2 via a high-pass ...
Page 13
The gains are offset such that A2’s gain is increased only after A1’s gain has reached its maximum value (see Figure 26). Note that for a differential input of −700 mV or less, the gain of a single amplifier (A1 ...
Page 14
AD600/AD602 COMBINED –10 –0.5 0 0.5 1.0 1 Figure 27. Plot of Separate and Overall Gains in Sequential Control –1 –2 ...
Page 15
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. However ...
Page 16
AD600/AD602 REALIZING OTHER GAIN RANGES Larger gain ranges can be accommodated by cascading amplifiers. Combinations built by cascading two amplifiers include − +60 dB (using one AD602), − +70 dB (using ½ AD602 followed ...
Page 17
This is a Class AB amplifier increases in a positive IN direction, Q1 conducts more heavily and its r while Q2 increases. Conversely, increasingly negative values of V result in the decreasing, while the r ...
Page 18
AD600/AD602 A simple half-wave detector is used based on Q1 and R2. The average current into Capacitor C2 is the difference between the current provided by the AD590 (300 μA at 300 K, 27°C) and the collector current of Q1. ...
Page 19
INPUT AMPLITUDE (V rms) Figure 39. Output Stabilization vs. rms Input for Sine Wave Inputs at 100 kHz, 1 MHz, and 10 MHz While the band gap principle used here sets the output amplitude ...
Page 20
AD600/AD602 CAL 0dB C1LO 1 R1 INPUT 115Ω A1HI 1V rms 2 MAX R2 200Ω A1LO (SINE WAVE) 3 GAT1 4 GAT2 R3 5 133kΩ A2LO 6 A2HI U3A 7 C2LO 1/2 8 AD712 15.625mV/dB 3.01kΩ Figure ...
Page 21
This system can, of course, be used as an AGC amplifier in which the rms value of the input is leveled. Figure 43 shows the decibel output voltage. More revealing is Figure 44, which shows that the deviation from the ...
Page 22
AD600/AD602 C1LO 1 INPUT A1HI 1V rms 2 + MAX A1 A1LO (SINE WAVE) 3 – GAT1 4 REF GAT2 5 A2LO 6 – A2 A2HI 7 + C2LO 8 U1 AD600 +5V FB 0.1µF +5V DEC 0.1µF –5V DEC ...
Page 23
INPUT SIGNAL (V rms) Figure 49. Gain Error for Figure 41 Without the 2 dB Offset Modification 2.0 1.5 1.0 0.5 0.1 0 –0.1 ...
Page 24
AD600/AD602 Figure 51 shows the circuit for the sequential control scheme with R16 provide offsets of 42.14 dB between the individual amplifiers to ensure smooth transitions between the gain of each successive X-AMP, with the sequence of ...
Page 25
INPUT SIGNAL (V rms) Figure 52 Linear over the Full 120 dB Range LOG Figure 52 shows linear over ...
Page 26
AD600/AD602 For the next control range, the gain of U1A remains fixed at its maximum value of 41.07 dB and only the gain of U1B is varied, while that of U2A remains at its minimum value of ...
Page 27
OUTLINE DIMENSIONS PIN 1 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.005 (0.13) MIN 0.098 (2.49) MAX 16 9 0.310 (7.87) 0.220 (5.59 PIN 1 0.100 (2.54) BSC 0.840 (21.34) ...
Page 28
... AD600JR AD600JR-REEL AD600JR-REEL7 AD600JRZ AD600JRZ- AD600JRZ- AD600SQ/883B AD602AQ − +30 dB AD602AR − +30 dB AD602AR-REEL − +30 dB AD602AR-REEL7 − + AD602ARZ − + AD602ARZ-R7 − +30 dB AD602ARZ-RL 1 − +30 dB AD602JCHIPS AD602JN − + AD602JNZ − +30 dB AD602JR − +30 dB AD602JR-REEL – +30 dB AD602JR-REEL7 − + AD602JRZ − ...