SSM2018P Analog Devices Inc, SSM2018P Datasheet
SSM2018P
Specifications of SSM2018P
Available stocks
Related parts for SSM2018P
SSM2018P Summary of contents
Page 1
FEATURES 117 dB Dynamic Range 0.006% Typical THD kHz, Unity Gain) 140 dB Gain Range No External Trimming Required Differential Inputs Complementary Gain Outputs Buffered Control Port I–V Converter On-Chip (SSM2018T) Differential Current Outputs (SSM2118T) Low External ...
Page 2
SSM1018T/SSM2118T–SPECIFICATIONS ELECTRICAL SPECIFICATIONS circuit with 18 k resistors, –V floating, and Class AB gain core bias (R IN specifications apply +25 C.] A Parameter 1 AUDIO PERFORMANCE Noise Headroom Total Harmonic Distortion plus Noise INPUT AMPLIFIER Bias ...
Page 3
ABSOLUTE MAXIMUM RATINGS Supply Voltage Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 4
SSM2018T/SSM2118T–Typical Characteristics 0 + 15V 18k F 0.010 AV = –20dB AV = 0dB 0.001 20 100 1k FREQUENCY – Hz Figure 1. SSM2018T THD + N Frequency (80 kHz Low-Pass ...
Page 5
15V S 400 300 200 100 0 10 100 1k FREQUENCY – Hz Figure 7. SSM2018T Noise Density vs. Frequency R = 18k + ...
Page 6
SSM2018T/SSM2118T–Typical Characteristics –20 –40 –60 –80 100 1k 10k 100k FREQUENCY – Hz Figure 13. SSM2018T Gain vs. Frequency 0 + 18k +20dB V 0.010 ...
Page 7
0.01 0.001 SUPPLY VOLTAGE – Volts Figure 19. SSM2118T THD + N vs. Supply Voltage ( dB rms kHz, 80 ...
Page 8
SSM2018T/SSM2118T –20 –40 –60 –80 100 1k 10k 100k FREQUENCY – Hz Figure 25. SSM2118T Gain vs. Frequency 0.06 0. 10dBu IN 0. –20dB V AND V = –10dBu IN 0.03 A ...
Page 9
V = 15V S –25 –30 –35 –40 –40 – TEMPERATURE – C Figure 31. SSM2018T and SSM2118T Gain Constant vs. Temperature – + 15V S –29 –30 –31 –32 ...
Page 10
SSM2018T/SSM2118T APPLICATIONS The SSM2018T is a trimless Voltage Controlled Amplifier (VCA) for volume control in audio systems. The SSM2018T is identical to the original SSM2018 in functionality and pinout; however the first professional quality audio VCA in the ...
Page 11
COMP 2 2 COMPENSATION NETWORK 7 –IN +IN 6 V– 10 Figure 38. SSM2018T Detailed Functional Diagram same is true for the inverting input, which is connected to Pin 1. The overall feedback ensures that the current flowing through the ...
Page 12
SSM2018T/SSM2118T COMP COMPENSATION 7 –IN 6 +IN V– 10 Figure 40. SSM2118T Detailed Functional Diagram –0 +6.0 V. The negative compliance is much smaller be- cause the gain core transistors (Q1 and Q3) begin to ...
Page 13
Boltzmann’s constant = T 1.38E-23 electron charge = 1.6E-19, and T = absolute temperature in Kelvin). This temperature dependency leads to the –3500 ppm/ C drift of the control law. It ...
Page 14
SSM2018T/SSM2118T 1µF 2k CONTROL V C VOLTAGE 1k * 3500ppm/ C *PRECISION RESISTOR CO 10601 75 3500ppm/ C LARGO, FL 34647 (813) 541-5771 Figure 42. Two TCRs Compensate for Temperature Drift of Gain Constant 50pF R1 R3 CONTROL ...
Page 15
SSM2018T 18k IN IN– 18k 8 9 47pF V+ V+ 100k OP176 10 F 100k ...
Page 16
SSM2018T/SSM2118T Voltage Controlled Panner An interesting circuit that is built with the OVCE building block is a voltage controlled panner. Figure 48 shows the feedback connection for the circuit. Notice that the average of both out- puts is fed back ...