LTC6911-1/LTC6911-2 Dual Matched Amplifiers with Digitally Programmable Gain in MSOP FEATURES DESCRIPTIO n 3-Bit Digital Gain Control: The LTC 6911 is a family of low noise digitally program- (Inverting Gains of 0, 1, 2, 5, 10, 20, 50 mable gain amplifiers (PGAs) that are easy to use and and 100V/V) -1 Option occupy very little PC board space. The matched gain of (Inverting Gains of 0, 1, 2, 4, 8, 16, 32 both channels is adjustable using a 3-bit parallel interface and 64V/V) -2 Option to select voltage gains of 0, 1, 2, 5, 10, 20, 50 and 100V/ n Two Matched Programmable Gain Amplifiers V (LTC6911-1) and 0, 1, 2, 4, 8, 16, 32 and 64V/V n Channel-to-Channel Gain Matching of 0.1dB (Max) (LTC6911-2). All gains are inverting. n Rail-to-Rail Input Range The LTC6911 family consists of two matched inverting n Rail-to-Rail Output Swing amplifiers with rail-to-rail outputs. When operated with n Single or Dual Supply: 2.7V to 10.5V Total unity gain, they will also process rail-to-rail input signals. n 11MHz Gain Bandwidth Product A half-supply reference generated internally at the AGND n Input Noise: 10nV/ Hz pin supports single power supply applications. Operating n Total System Dynamic Range to 120dB from single or split supplies from 2.7V to 10.5V, the n Input Offset Voltage: 2mV, Gain of 10 LTC6911 family is offered in a 10-lead MSOP package. n Low Profile 10-Lead MSOP Package , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S n Data Acquisition Systems n Dynamic Gain Changing n Automatic Ranging Circuits n Automatic Gain Control TYPICAL APPLICATIO + V 2.7V TO 10.5V 0.1F Frequency Response (LTC6911-1) 79 50 V = 10V, V = 5mV S IN RMS GAIN OF 100 (DIGITAL INPUT 111) DIGITAL 40 INPUT GAIN IN V/V 1 10 G2 G1 G0 LTC6911-1 LTC6911-2 V = OUTA V INA 30 GAIN V 0 0 0 0 0 INA GAIN OF 50 (DIGITAL INPUT 110) AGND 0 0 1 1 1 1F GAIN OF 20 (DIGITAL INPUT 101) 0 1 0 2 2 20 2 0 1 1 5 4 LTC6911-X GAIN OF 10 (DIGITAL INPUT 100) 1 0 0 10 8 GAIN OF 5 (DIGITAL INPUT 011) 1 0 1 20 16 10 1 1 0 50 32 3 8 V = 1 1 1 100 64 OUTB GAIN OF 2 (DIGITAL INPUT 010) V INB GAIN V INB 0 GAIN OF 1 (DIGITAL INPUT 001) 10 691112 TA01 100 1k 10k 100k 1M 10M 45 6 FREQUENCY (Hz) G0 G1 G2 691112 TA02 sn691112 691112fs 1 GAIN (dB) U ULTC6911-1/LTC6911-2 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) + TOP VIEW Total Supply Voltage (V to V ) .............................. 11V INA 1 10 OUTA Input Current ..................................................... 10mA AGND 2 9 V INB 3 8 OUTB Operating Temperature Range (Note 2) + G0 4 7 V LTC6911C-1/LTC6911C-2 .................. 40 C to 85 C G1 5 6 G2 MS PACKAGE LTC6911I-1/LTC6911I-2 .................... 40 C to 85 C 10-LEAD PLASTIC MSOP LTC6911H-1/LTC6911H-2 ................ 40 C to 125 C T = 150 C, q = 230 C/W JMAX JA Specified Temperature Range (Note 3) LTC6911C-1/LTC6911C-2 .................. 40 C to 85 C ORDER PART NUMBER MS PART MARKING LTC6911I-1/LTC6911I-2 .................... 40 C to 85 C LTC6911CMS-1 LTAHK LTC6911H-1/LTC6911H-2 ................ 40 C to 125 C LTC6911IMS-1 LTAHM Storage Temperature Range ................. 65 C to 150 C LTC6911HMS-1 LTBCF Lead Temperature (Soldering, 10 sec).................. 300 C LTC6911CMS-2 LTAHH LTC6911IMS-2 LTAHJ LTC6911HMS-2 LTBCG Consult LTC Marketing for parts specified with wider operating temperature ranges. GAI SETTI GS A D PROPERTIES Table 1 (LTC6911-1) NOMINAL NOMINAL MAXIMUM LINEAR INPUT RANGE (V ) P-P INPUT DIGITAL INPUTS VOLTAGE GAIN Dual 5V Single 5V Single 3V IMPEDANCE G2 G1 G0 Volts/Volt (dB) Supply Supply Supply (kW ) 0 0 0 0 120 10 5 3 (Open) 0 0 1 1 0 10 5 3 10 0 1 0 2 6 5 2.5 1.5 5 0 1 1 5 14 2 1 0.6 2 1 0 0 10 20 1 0.5 0.3 1 1 0 1 20 26 0.5 0.25 0.15 1 1 1 0 50 34 0.2 0.1 0.06 1 1 1 1 100 40 0.1 0.05 0.03 1 Table 2 (LTC6911-2) NOMINAL NOMINAL MAXIMUM LINEAR INPUT RANGE (V ) P-P INPUT DIGITAL INPUTS VOLTAGE GAIN Dual 5V Single 5V Single 3V IMPEDANCE G2 G1 G0 Volts/Volt (dB) Supply Supply Supply (kW ) 0 0 0 0 120 10 5 3 (Open) 0 0 1 1 0 10 5 3 10 0 1 0 2 6 5 2.5 1.5 5 0 1 1 4 12 2.5 1.25 0.75 2.5 1 0 0 8 18.1 1.25 0.625 0.375 1.25 1 0 1 16 24.1 0.625 0.3125 0.188 1.25 1 1 0 32 30.1 0.3125 0.156 0.094 1.25 1 1 1 64 36.1 0.156 0.078 0.047 1.25 sn691112 691112fs 2 UUU U WWW