Integrated Circuit - SSI2164, Quad VCA, Sound Semiconductor
The FatKeys™ SSI2164 is perhaps the most flexible VCA available, with four independent channels for lowest cost-per-VCA. The user-selectable mode control allows Class A, AB, or intermediate biasing, and current inputs and outputs provide great design freedom. Ideal for voltage-controlled filters.
The SSI2164 is a versatile VCA building block for high-performance audio applications. Four independent channels provide voltage control of current-mode inputs and outputs for a gain range from +20dB to –100dB, with control provided by a ground-referenced –33mV/dB constant. The SSI2164 will directly retrofit existing SSM/V2164 positions while offering improvements that include significantly lower overall distortion, on-chip protection against asymmetrical power failure, and a substantial increase of input current handling.
The device offers considerable flexibility for a wide range of design goals and applications. A unique mode control allows selection of Class A, Class AB, or in-between using a single resistor. In addition, improved current handling allows use of considerably lower value input resistors for reduced output noise without loss of headroom. Two or more channels can be parallel-connected for further noise improvement. Finally, SSI2164 VCA channels can be used as high-quality OTA building blocks for a variety of applications such as voltage controlled filters, exponential generators, and antilog converters.
The SSI2164 will operate on supplies as low as +8V for battery-powered devices such as guitar pedals, or up to ±18V in systems where maximum headroom is desired. For the single version, see P-Q-SSI2161. For the dual version, see P-Q-SSI2162.
Features:
- Improved Direct Replacement for SSM2164/V2164
- Input Current Handling Increased 2x to 1mA
- Pin-Selectable Class A or AB Operation
- 118dB Dynamic Range (Class AB)
- Low Distortion – Typical 0.025% (Class A)
- Large Gain Range: -100dB to +20dB
- ±4V to ±18V Operation
- No External Trimming
- Low Control Feedthrough – Typical -60dB
Accessory Items:
Channel Separation (CF = 10pF) | -110 dB | ||
Class AB Output Noise (RIN/OUT = 7.5kΩ) | -101dBu | ||
Class AB Output Noise (RIN/OUT = 15kΩ) | -98 dBu | ||
Class AB Output Noise (RIN/OUT = 20kΩ) | -96 dBu | ||
Class AB Output Noise (RIN/OUT = 30kΩ) | -93 dBu | ||
Class AB Total Harmonic Distortion (AV = +20dB) | 0.20 % | ||
Class AB Total Harmonic Distortion (AV = -20dB) | 0.045 % | ||
Class AB Total Harmonic Distortion (AV = 0dB) | 0.05 % | ||
Class AB Total Harmonic Distortion (AV = 0dB, VIN = –17dBu) | 0.025 % | ||
Class A Output Noise (RIN/OUT = 7.5kΩ) | -92.5 dBu | ||
Class A Output Noise (RIN/OUT = 15kΩ) | -87 dBu | ||
Class A Output Noise (RIN/OUT = 20kΩ) | -84 dBu | ||
Class A Output Noise (RIN/OUT = 30kΩ) | -81 dBu | ||
Class A Total Harmonic Distortion (AV = +20dB) | 0.17 % | ||
Class A Total Harmonic Distortion (AV = -20dB) | 0.025 % | ||
Class A Total Harmonic Distortion (AV = 0dB) | 0.025 % | ||
Class A Total Harmonic Distortion (AV = 0dB, VIN = –5dBu) | 0.015 % | ||
Control Pin Max. Voltage (Pin 4) | V- to V+ | ||
Control Port - Channel-to-Channel Gain Matching (AV = -40dB) | 0.24 dB | ||
Control Port - Channel-to-Channel Gain Matching (AV = 0dB) | 0.07 dB | ||
Control Port - Control Feedthrough (AV = 0dB to –40dB) | -60 dB | ||
Control Port - Gain Accuracy (AV = +20dB) | ±0.55 dB | ||
Control Port - Gain Accuracy (AV = -20dB) | ±0.55 dB | ||
Control Port - Gain Accuracy (AV = 0dB) | ±0.30 dB | ||
Control Port - Gain Constant (After 60 seconds of operation) | -33 mV/dB | ||
Control Port - Gain Constant Temp. Coefficient | -3300 ppm/°C | ||
Control Port - Max. Input Impedance | 11 kΩ | ||
Control Port - Maximum Attenuation | -100 dB | ||
Control Port - Maximum Gain | +20 dB | ||
Control Port - Min. Input Impedance | 9 kΩ | ||
Control Port - Typ. Input Impedance | 10 kΩ | ||
Headroom (1% THD) | +22 dBu | ||
Max. Lead Temperature (Soldering, 10 sec) | 260°C | ||
Max. Mode Current (IM; Pin 1 to Pin 10 via RM) | 2.0 mA | ||
Max. Operating Temperature Range | -40°C to +85°C | ||
Max. Storage Temperature Range | -65°C to +150°C | ||
Max. Supply Current (Class AB, VC = GND) | ±8 mA | ||
Max. Supply Voltage | ±20 V | ||
Max. Supply Voltage Range | ±18 V | ||
Min. Supply Voltage Range | ±4 V | ||
Power Supply Rejection Ratio (60Hz) | 90 dB | ||
Signal Input - Input Bias Current | ±10 Na | ||
Signal Input - Input Current Handling | 1 mAP | ||
Signal Output - Output Compliance | ±100 mV | ||
Signal Output - Output Offset Current (VIN = GND) | ±150 nA | ||
Slew Rate | 700 µA/µs | ||
Supply Current (Class A, VC = GND, IM = 1mA) | ±8.4 mA | ||
Typ. Supply Current (Class AB, VC = GND) | ±6 mA | ||
Unity Gain Bandwidth (CF = 10pF) | 500 kHz |
Packaging Dimensions | 0.395 in. × 0.243 in. × 0.055 in. | ||
Weight (Packaging) | 0.0018 lbs. |
Datasheet | All Models |
Package Dimensions | All Models |
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