TS636

TS636 DIFFERENTIAL VARIABLE GAIN AMPLIFIER FOR ADSL LINE INTERFACE s s s s LOW NOISE : 4.7nV/√Hz LOW DISTORTION HIGH SLEW RATE : 90V/µs WIDE BANDWIDTH : 52MHz @ -3dB & 18dB gain with 3dB STEPS s GAIN PROGRAMMABLE from -9dB to +30dB s POWER DOWN FUNCTION DESCRIPTION This TS636 is particularly intended for applications such as preamplification in telecommunication systems using multiple carriers. It has been minly designed to fit with ADSL chip-sets such as ASCOT ADSL chip-set for CPE. The TS636 is a differential digitally controled variable gain amplifier featuring a high slew rate of 90V/µs, a large bandwidth, a very low distortion and a very low current and voltage noise. The gain can be set from -9dB to +30dB through a 4bit digital word, with 3dB steps. The gain monotonicity is guaranteed by design. The TS636 comes in SO-14 plastic packages. APPLICATION Input 2 3 4 5 Gain Control Logic Decoder 12 Output 2 11 Power Down 10 -Vcc 9 AGND 8 DGND +Vcc1 1 14 +Vcc2 D SO14 (Plastic Micropackage) PIN CONNECTIONS (top view) Input 1 2 13 Output 1 LSB GC1 s Preamplifier with automatic gain control for Asymmetric Digital Subscriber Line (ADSL). ORDER CODE Package Part Number TS636I Temperature Range D -40, +85°C GC2 GC3 6 7 MSB GC4 D = Small Outline Package (SO) - also available in Tape & Reel (DT) January 2001 1/9 TS636 ABSOLUTE MAXIMUM RATINGS Symbol VCC Vi Toper Tstd Tj Rthjc Rthja Supply voltage Input Voltage 2) 1) Parameter Value 14 0 to 14 -40 to + 85 -65 to +150 ...