LTC6910-1/ LTC6910-2/LTC6910-3 Digitally Controlled Programmable Gain Amplifiers in SOT-23 Fea T Descrip T n 3-Bit Digital Gain Control in Three Gain-Code The LTC 6910 family are low noise digitally program- Options mable gain amplifiers (PGAs) that are easy to use and n Rail-to-Rail Input Range occupy very little PC board space. The inverting gain is n Rail-to-Rail Output Swing adjustable using a 3-bit digital input to select gains of 0, n Single or Dual Supply: 2.7V to 10.5V Total 1, 2, 5, 10, 20, 50 and 100V/V in the LTC6910-1 0, 1, 2, n 11MHz Gain Bandwidth Product 4, 8, 16, 32 and 64V/V in the LTC6910-2 and 0, 1, 2, 3, n Input Noise Down to 8nV/Hz 4, 5,6 and 7V/V in the LTC6910-3. n System Dynamic Range to 120dB The LTC6910-Xs are inverting amplifiers with rail-to-rail n Input Offset Voltage: 1.5mV output. When operated with unity gain, they will also n 8-Pin Low Profile (1mm) SOT-23 process rail-to-rail input signals. A half-supply refer- (ThinSOT) Package ence generated internally at the AGND pin supports single power supply applications. Operating from single or split supplies from 2.7V to 10.5V, the LTC6910-X family is a T offered in an 8-lead SOT-23 package. n Data Acquisition Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their Dynamic Gain Changing respective owners. Protected by U.S. patents, including 6121908. n Automatic Ranging Circuits n Automatic Gain Control Typical a T Single Supply Programmable Amplifier Frequency Response (LTC6910-1) + 50 V V = 10V, V = 5mV S IN RMS 2.7V TO 10.5V GAIN OF 100 (DIGITAL INPUT 111) 0.1F 40 DIGITAL INPUTS GAIN IN VOLTS/VOLT G2 G1 G0 6910-1 6910-2 6910-3 30 8 GAIN OF 50 (DIGITAL INPUT 110) 0 0 0 0 0 0 4 0 0 1 1 1 1 GAIN OF 20 (DIGITAL INPUT 101) 0 1 0 2 2 2 3 1 20 V LTC6910-X V = GAIN V IN OUT IN 0 1 1 5 4 3 GAIN OF 10 (DIGITAL INPUT 100) 2 1 0 0 10 8 4 5 GAIN OF 5 (DIGITAL INPUT 011) 1 0 1 20 16 5 10 AGND 6 1 1 0 50 32 6 7 1F OR LARGER GAIN OF 2 (DIGITAL INPUT 010) 1 1 1 100 64 7 G2 G1 G0 6910 TA01 0 GAIN OF 1 (DIGITAL INPUT 001) PIN 2 (AGND) PROVIDES BUILT-IN HALF-SUPPLY REFERENCE WITH INTERNAL RESISTANCE OF 5k. 10 AGND CAN ALSO BE DRIVEN BY A SYSTEM ANALOG 100 1k 10k 100k 1M 10M GROUND REFERENCE NEAR HALF SUPPLY FREQUENCY (Hz) 6910 TA01b 6910123fb 1 For more information www.linear.com/LTC6910 GAIN (dB) ion pplica ions pplica ion uresLTC6910-1/ LTC6910-2/LTC6910-3 a Te Maxi Mu M r a T p in c F T (Note 1) Total Supply Voltage (V+ to V) ............................... 11V Input Current ...................................................... 25mA TOP VIEW + Operating Temperature Range (Note 2) OUT 1 8 V AGND 2 7 G2 LTC6910-1C, -2C, -3C ..........................40C to 85C IN 3 6 G1 LTC6910-1I, -2I, -3I ............................. 40C to 85C V 4 5 G0 LTC6910-1H, -2H, -3H ...................... 40C to 125C TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 Specified T emperature Range (Note 3) T = 150C, = 230C/W JMAX JA LTC6910-1C, -2C, -3C .......................... 40C to 85C LTC6910-1I, -2I, -3I ............................. 40C to 85C LTC6910-1H, -2H, -3H ...................... 40C to 125C Storage Temperature Range ................... 65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C o r Der i n F Ma T