Blackmer Trimmable IC Voltage Controlled Amplifiers THAT 2181A, 2181B, 2181C FEATURES APPLICATIONS Wide Dynamic Range: >120 dB Faders Wide Gain Range: >130 dB Panners Exponential (dB) Gain Control Compressors Low Distortion: Expanders ~ 0.0025 % (typical 2181A) Equalizers ~ 0.005 % (typical 2181C) Filters Wide Gain-Bandwidth: 20 MHz Oscillators Dual Gain-Control Ports (pos/neg) Automation Systems Pin-Compatible with 2150-Series Description THAT 2181 Series integrated-circuit voltage The VCA design takes advantage of a fully controlled amplifiers (VCAs) are very high- complementary dielectric isolation process which performance current-in/current-out devices with offers closely matched NPN/PNP pairs. This deliv- two opposing-polarity, voltage-sensitive control ers performance unobtainable through any ports. They offer wide-range exponential control conventional process, integrated or discrete. The of gain and attenuation with low signal distortion. parts are available in three grades, allowing the The parts are selected after packaging based user to optimize cost vs. performance. Both 8-pin primarily on after-trim THD and control-voltage single-in-line (SIP) and surface mount (SO) feedthrough performance. packages are available. Pin Name SIP Pin SO Pin Input 1 1 7 Ec+ 2 2 Vcc 2k Ec- 3 3 Sym 4 4 BIAS CURRENT 2 COMPENSATION Ec+ V- 5 5 25 Ec- Gnd 6 6 3 Vbe V+ 7 7 MULTI- Input 8 PLIER 1 Output Output 8 8 4 6 Sym Table 1. Pin Assignments Gnd Max Trimmed Iadj Plastic Plastic THD V- SIP SO 5 1V,1kHz,0dB Iset 0.01% 2181AL08-U 2181AS08-U 0.02% 2181BL08-U 2181BS08-U 0.05% 2181CL08-U 2181CS08-U Table 2. Ordering information Figure 1. 2181 Series Equivalent Circuit Diagram THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2008, THAT Corporation Document 600030 Rev 02Document 600030 Rev 02 Page 2 of 12 THAT 2181 Series Blackmer Trimmable IC VCAs 1 SPECIFICATIONS 2,3 Absolute Maximum Ratings Positive Supply Voltage (V )+20 V Power Dissipation (P ) (T = 75 C) 330 mW CC D A Negative Supply Voltage (V ) -20 V Operating Temperature Range (T ) 0 to +70 C EE OP Supply Current (ICC) 10 mA Storage Temperature Range (TST) -40 to +125 C Maximum E E - (E ) 1 V C C+ C- Recommended Operating Conditions 2181A 2181B 2181C Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units Positive Supply Voltage VCC +4 +15 +18 +4 +15 +18 +4 +15 +18 V Negative Supply Voltage V -4 -15 -18 -4 -15 -18 -4 -15 -18 V EE Bias Current I V - V = 30 V 1 2.4 3.5 1 2.4 3.5 1 2.4 3.5 mA SET CC EE Signal Current I + I I = 2.4 mA 0.35 2.5 0.35 2.5 0.35 2.5 mA IN OUT SET 2 Electrical Characteristics 2181A 2181B 2181C Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units Supply Current I No signal 2.4 4 2.4 4 2.4 4 mA CC Equiv. Input Bias Current I No Signal 2 10 2 12 2 15 nA B Input Offset Voltage V No Signal 5 5 5 mV OFF(IN) Output Offset Voltage V R = 20 k OFF(OUT) out 0 dB gain 0.5 1 1 2 1.5 3 mV +15 dB gain 1 3 1.5 4 3 10 mV +30 dB gain 3 12 5 15 9 30 mV Gain Cell Idling Current I 20 20 20 A IDLE Gain-Control Constant T =25C (T 35C) A CHIP -60 dB < gain < +40 dB E /Gain (dB) Pin 2 (Fig. 15) 6.0 6.1 6.2 6.0 6.1 6.2 6.0 6.1 6.2 mV/dB C+ E /Gain (dB) Pin 3 -6.2 -6.1 -6.0 -6.2 -6.1 -6.0 -6.2 -6.1 -6.0 mV/dB C- Gain-Control TempCo E / T Ref T = 27C +0.33 +0.33 +0.33 %/C C CHIP CHIP Gain-Control Linearity -60 to +40 dB gain 0.5 2 0.5 2 0.5 2 % 1 kHz Off Isolation E = -360mV,E =+360mV 110 115 110 115 110 115 dB C+ C- Output Noise e 20 Hz ~ 20 kHz n(OUT) Rout = 20k 0 dB gain -98 -97 -98 -96 -98 -95 dBV +15 dB gain -88 -86 -88 -85 -88 -84 dBV Voltage at V- V No Signal -3.1 -2.85 -2.6 -3.1 -2.85 -2.6 -3.2 -2.85 -2.6 V V- 1. All specifications are subject to change without notice. 2. Unless otherwise noted, T =25C, V =+15V, V = -15V. Test circuit as shown in Figure 2. SYM ADJ is adjusted for minimum THD at 1 V, 1 kHz, Ec- = -Ec+ = 0 V. A CC EE 3. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not impli ed. Exposure to absolute maximum rating condi- tions for extended periods may affect device reliability. THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2008, THAT Corporation