LTC6362 - Precision, Low Power Rail-to-Rail …

1 LTC6362 . Precision, Low Power Rail-to-Rail Input/Output Differential Op Amp/SAR. ADC Driver FEATURES DESCRIPTION. n 1mA Supply Current The LTC 6362 is a low Power , low noise differential op n Single to supply amp with Rail-to-Rail input and output swing that has been n Fully Differential Input and Output optimized to drive low Power SAR ADCs. The LTC6362 . n 200 V Max Offset Voltage draws only 1mA of supply current in active operation, and n 260nA Max Input Bias Current features a shutdown mode in which the current consump- n Fast Settling: 550ns to 18-Bit, 8V. P-P Output tion is reduced to 70 A. n Low Distortion: 116dBc at 1kHz, 8V. P-P. n Rail-to-Rail Inputs and Outputs The amplifier may be configured to convert a single- n Hz Input-Referred Noise ended input signal to a differential output signal, and is n 180 MHz Gain-Bandwidth Product capable of being operated in an inverting or noninverting n 34 MHz 3dB Bandwidth configuration.

2 N Low Power Shutdown: 70 A Low offset voltage, low input bias current, and a stable n 8-Lead MSOP and 3mm 3mm 8-Lead DFN Packages high impedance configuration make this amplifier suit- able for use not only as an ADC driver but also earlier in APPLICATIONS the signal chain, to convert a precision sensor signal to n 16-Bit and 18-Bit SAR ADC Drivers a balanced (differential) signal for processing in noisy n Single-Ended-to-Differential Conversion industrial environments. n Low Power Pipeline ADC Driver The LTC6362 is available in an 8-lead MSOP package and n Differential Line Drivers also in a compact 3mm 3mm 8-pin leadless DFN pack- n Battery-Powered Instrumentation age, and operates with guaranteed specifications over a L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear 40 C to 125 C temperature range.

3 Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION LTC6362 Driving LTC2379-18. fIN = 2kHz, 1dBFS, 16384-Point FFT. DC-Coupled Interface from a Ground-Referenced 0. VS = 5V, 0V. 10. Single-Ended Input to an LTC2379-18 SAR ADC 20 VOUTDIFF = 30 HD2 = 1k HD3 = 5V 40. SFDR = AMPLITUDE (dBFS). 5V 50 THD = 60 SNR = 1k VREF VDD. 70 SINAD = VOCM. + AIN+ 18-BIT. 80. VIN LTC2379-18 90. LTC6362 F SHDN SAR ADC. 100. + AIN 110. GND 120. 1k 1k 6362 TA01a 130. 140. 150. 0 100 200 300 400 500 600 700 800. FREQUENCY (kHz). 6362 TA01b 6362fa 1. LTC6362 . ABSOLUTE MAXIMUM RATINGS (Note 1). Total Supply Voltage (V+ V ).. Specified Temperature Range (Note 5). Input Current (+IN, IN, VOCM, SHDN) (Note 2).

4 10mA 0 C to 70 C. Output Short-Circuit Duration (Note 3).. Indefinite 40 C to 85 C. Operating Temperature Range (Note 4) 40 C to 125 C. LTC6362 40 C to 85 C Maximum Junction 150 C. 40 C to 125 C Storage Temperature 65 C to 150 C. PIN CONFIGURATION. TOP VIEW. TOP VIEW IN 1 8 +IN. IN 1 8 +IN VOCM 2 7 SHDN. VOCM 2 7 SHDN. V+ 3 6 V V+ 3 6 V . +OUT 4 5 OUT +OUT 4 9 5 OUT. V . MS8 PACKAGE. 8-LEAD PLASTIC MSOP. DD PACKAGE. TJMAX = 150 C, JA = 273 C/W, JC = 45 C/W 8-LEAD (3mm 3mm) PLASTIC DFN. TJMAX = 150 C, JA = C/W, JC = 45 C/W. EXPOSED PAD (PIN 9) IS V , MUST BE SOLDERED TO PCB. ORDER INFORMATION. LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE. LTC6362 CMS8#PBF LTC6362 CMS8#TRPBF LTGCN 8-Lead Plastic MSOP 0 C to 70 C.

5 LTC6362 IMS8#PBF LTC6362 IMS8#TRPBF LTGCN 8-Lead Plastic MSOP 40 C to 85 C. LTC6362 HMS8#PBF LTC6362 HMS8#TRPBF LTGCN 8-Lead Plastic MSOP 40 C to 125 C. LTC6362 CDD#PBF LTC6362 CDD#TRPBF LGCM 8-Lead (3mm 3mm) Plastic DFN 0 C to 70 C. LTC6362 IDD#PBF LTC6362 IDD#TRPBF LGCM 8-Lead (3mm 3mm) Plastic DFN 40 C to 85 C. LTC6362 HDD#PBF LTC6362 HDD#TRPBF LGCM 8-Lead (3mm 3mm) Plastic DFN 40 C to 125 C. Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: For more information on tape and reel specifications, go to: 6362fa 2.

6 LTC6362 . ELECTRICAL. The CHARACTERISTICS l denotes the specifications which apply over the full operating + . temperature range, otherwise specifications are at TA = 25 C. V = 5V, V = 0V, VCM = VOCM = VICM = , VSHDN = open. VS is defined as (V+ V ). VOUTCM is defined as (V+OUT + V OUT)/2. VICM is defined as (V+IN + V IN)/2. VOUTDIFF is defined as (V+OUT V OUT). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS. VOSDIFF (Note 6) Differential Offset Voltage (Input Referred) VS = 3V. VICM = 50 200 V. l 350 V. VICM = 65 250 V. l 600 V. VS = 5V. VICM = 50 200 V. l 350 V. VICM = 75 260 V. l 600 V. VOSDIFF/ T (Note 7) Differential Offset Voltage Drift (Input Referred) VS = 3V l V/ C. VS = 5V l V/ C. IB (Note 8) Input Bias Current VS = 3V.

7 VICM = 100 350 nA. l 500 nA. VICM = 75 350 nA. l 850 nA. VS = 5V. VICM = 75 260 nA. l 460 nA. VICM = 75 350 nA. l 850 nA. IB/ T Input Bias Current Drift VS = 3V l nA/ C. VS = 5V l nA/ C. IOS (Note 8) Input Offset Current VS = 3V. VICM = 75 325 nA. l 650 nA. VICM = 125 425 nA. l 1200 nA. VS = 5V. VICM = 75 325 nA. l 500 nA. VICM = 125 425 nA. l 1200 nA. RIN Input Resistance Common Mode 14 M . Differential Mode 32 k . CIN Input Capacitance Differential Mode 2 pF. en Differential Input Noise Voltage Density f = 100kHz, Not Including RI/RF Noise nV/ Hz in Input Noise Current Density f = 100kHz, Not Including RI/RF Noise pA/ Hz envocm Common Mode Noise Voltage Density f = 100kHz nV/ Hz VICMR (Note 9) Input Common Mode Range VS = 3V l 0 3 V.

8 VS = 5V l 0 5 V. CMRRI (Note 10) Input Common Mode Rejection Ratio VS = 3V, VICM from 0V to 3V l 70 95 dB. (Input Referred) VICM/ VOSDIFF VS = 5V, VICM from 0V to 5V l 73 98 dB. CMRRIO (Note 10) Output Common Mode Rejection Ratio VS = 3V, VOCM from to l 75 100 dB. (Input Referred) VOCM/ VOSDIFF VS = 5V, VOCM from to l 55 90 dB. PSRR (Note 11) Differential Power Supply Rejection VS = to l 80 105 dB. ( VS/ VOSDIFF). PSRRCM (Note 11) Output Common Mode Power Supply Rejection VS = to l 58 72 dB. ( VS/ VOSCM). 6362fa 3. LTC6362 . ELECTRICAL. The CHARACTERISTICS l denotes the specifications which apply over the full operating + . temperature range, otherwise specifications are at TA = 25 C. V = 5V, V = 0V, VCM = VOCM = VICM = , VSHDN = open.

9 VS is defined as (V+ V ). VOUTCM is defined as (V+OUT + V OUT)/2. VICM is defined as (V+IN + V IN)/2. VOUTDIFF is defined as (V+OUT V OUT). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS. GCM Common Mode Gain ( VOUTCM/ VOCM) VS = 3V, VOCM from to l 1 V/V. VS = 5V, VOCM from to l 1 V/V. GCM Common Mode Gain Error 100 (GCM 1) VS = 3V, VOCM from to l %. VS = 5V, VOCM from to l %. BAL Output Balance ( VOUTCM/ VOUTDIFF) VOUTDIFF = 2V. Single-Ended Input l 57 35 dB. Differential Input l 57 35 dB. AVOL Open-Loop Voltage Gain 95 dB. VOSCM Common Mode Offset Voltage VS = 3V l 6 30 mV. (VOUTCM VOCM) VS = 5V l 6 30 mV. VOSCM/ T Common Mode Offset Voltage Drift l 45 V/ C. VOUTCMR (Note 9) Output Signal Common Mode Range VOCM Driven Externally, VS = 3V l V.

10 (Voltage Range for the VOCM Pin) VOCM Driven Externally, VS = 5V l V. VOCM Self-Biased Voltage at the VOCM Pin VOCM Not Connected, VS = 3V l V. VOCM Not Connected, VS = 5V l V. RINVOCM Input Resistance, VOCM Pin l 110 170 230 k . VOUT Output Voltage, High, Either Output Pin IL= 0mA, VS = 3V l V. IL = 5mA, VS = 3V l V. IL= 0mA, VS = 5V l V. IL = 5mA, VS = 5V l V. Output Voltage, Low , Either Output Pin IL= 0mA, VS = 3V l V. IL = 5mA, VS = 3V l V. IL= 0mA, VS = 5V l V. IL = 5mA, VS = 5V l V. ISC Output Short-Circuit Current, Either Output Pin VS = 3V l 13 25 mA. VS = 5V l 15 35 mA. SR Slew Rate Differential 8VP-P Output 45 V/ s GBWP Gain-Bandwidth Product fTEST = 200kHz 145 180 MHz l 90 MHz f 3dB 3dB Bandwidth RI = RF = 1k 34 MHz HD2/HD3 2nd/3rd Order Harmonic Distortion f = 1kHz, VOUT = 8VP-P 120/ 116 dBc Single-Ended Input f = 10kHz, VOUT = 8VP-P 106/ 103 dBc f = 100kHz, VOUT = 8VP-P 84/ 76 dBc ts Settling Time to a 2VP-P Output Step 160 ns 180 ns (16-Bit) 230 ns 4ppm (18-Bit) 440 ns Settling Time to a 8VP-P Output Step 230 ns 300 ns (16-Bit) 460 ns 4ppm (18-Bit) 550 ns VS (Note 12) Supply Voltage Range l V.