LTC221CN

LTC221/LTC222 Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches DESCRIPTIO The LTC®221 and LTC222 are micropower, quad CMOS analog switches which typically dissipate only 250µW from ±15V supplies and 40µW from a single 5V supply. Onboard latches allow the LTC221 and LTC222 to interface directly to most microprocessor buses. The switches have 65Ω typical on resistance and a very high off resistance. A break before make characteristic is inherent in these switches to prevent the shorting of two channels. The signal range is ±15V with a supply voltage of ±15V and 0V to 5V with a single 5V supply. The switches have special charge compensation circuitry which greatly reduces charge injection to a maximum of ±25pC (±15V supplies). The LTC221 and LTC222 are designed for applications such as microprocessor controlled programmable gain amplifiers, automatic test equipment, communication systems, and data acquisition systems. The LTC221 is normally closed and the LTC222 is normally open as shown in the Logic Table. , LTC and LT are registered trademarks of Linear Technology Corporation. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Micropower Operation Single 5V or ±15V Supply Operation Low Charge Injection Low RON Low Leakage Guaranteed Break Before Make Latch Resistant Design TLL/CMOS Compatible Improved Second Source for DG221/DG222 Microprocessor Bus Compatible KEY SPECIFICATIO S ■ ■ ■ ■ Supply Current ..................... I+ = 40µA, I – = 5µA Max Charge Injection ±15V Supplies ................................. ±25pC Max Single 5V Supply .................................. 2pC Typ RON ............................................................... 65ΩTyp Signal Range ..................................................... ±15V TYPICAL APPLICATIO LTC221/LTC222 WR 5V V+ GND V– IN4 IN3 IN2 IN1 VFS VIN OV TO 5V S3 S4 D3 D4 S1 S2 D1 D2 Two-Channel, 12-Bit, Self Calibrating Data Acquisition System WR LOGIC DECODER ADDRESS BUS DATA BUS B0 – B3 TO MICROPROCESSOR e.g. TMS320C25 15V 5V 10k IN + LT1006 LTC1292 12-BIT ADC CLK DOUT CS SERIAL PORT 100k – 150k –IN GND 120Ω –15V R1 VREF 270Ω LT1027 VFS 15V LTC221/222 • TA01 U U U 2212fa 1 LTC221/LTC222 ABSOLUTE (Note 1) AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW IN1 1 D1 2 S1 3 V– 4 GND 5 S4 6 D4 7 IN4 8 16 IN2 15 D2 14 S2 13 V + 12 WR 11 S3 10 D3 9 IN3 Voltages Referenced to V – V+ ........................................................................................... 44V GND ..................................................................... 25V Digital Inputs, S, D (Note 2) .......... – 2V to (V + 2V) or Digital Inputs, S, D (N2020mA, Whichever Occurs First Current Any Input Except S or D ................................... 30mA Continuous S or D ............................................ 20mA Peak S or D (Pulsed at 1 ms, 10% Duty Cycle Max) ......... 70mA ESD Susceptibility (Note 3) ...................................... 4kV Power Dissipation (Plastic) ............................... 500mW Power Dissipation (Ceramic) ............................. 900mW Operating Temperature Range LTC221C/LTC222C .................................. 0°C to 70°C LTC221M/LTC222M (OBSOLETE).......–55°C to 125°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C ORDER PART NUMBER LTC221CN LTC221CS LTC222CN LTC222CS N PACKAGE 16-LEAD PDIP JMAX = 110°C, θJA = 120°C/W S PACKAGE 16-LEAD PLASTIC SO JMAX = 110°C, θJA = 130°C/W J PACKAGE 16-LEAD CERDIP OBSOLETE PACKAGE Consider the N or S Package for Alternate Source LTC221MJ LTC221CJ LTC222MJ LTC222CJ Consult LTC Marketing for parts specified with wider operating temperature ranges. LOGIC TABLE INX 0 1 X WR 0 0 1 LTC221 On Off Maintain Previous State LTC222 Off On Maintain Previous State DIGITAL A D DC ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply + – over full operating temperature range, otherwise specifications are at TA = 25°C. V = ±15V, V = –15V, GND = 0V, unless noted. PARAMETER Analog Signal Range RON CONDITIONS ● LTC221M/LTC222M MIN TYP MAX ±15 90 90 135 ±1 ±100 ±1 ±100 ±1 ±200 LTC221C/LTC222C MIN TYP MAX ±15 90 90 135 ±5 ±100 ±5 ±100 ±5 ±200 0.8 ±1 5 12 30 16 UNITS V Ω Ω Ω nA nA nA nA nA nA V V µA pF pF pF µA µA 2212fa VS = ±10V ID = 1mA Off Input Leakage IS (OFF) Off Output Leakage ID (0FF) On Channel Leakage lD (ON) Input High Voltage VINH, VWRH Input Low Voltage VINL, VWRL Input High or Low Current IINH, IINL, IWRH, IWRL CS (OFF) CD (OFF) CD, CS (ON) I+ TMIN 25°C TMAX VD = 14V, VS = ±14V ● 65 0.01 0.01 ● 65 0.01 0.01 0.02 2.4 VIN = 2.4V, LTC221 VIN = 0.8V, LTC222 VD = VS = ±14V, VIN = 2.4V, LTC222 VIN = 0.8V, LTC221 0.02 ● ● ● 2.4 0.8 ±1 5 12 30 16 VIN = 15V, 0V VWR = 15V, 0V ● All Channels On or Off VIN = VWR = 0V or 4.0V ● 40 60 40 60 2 U W U U WW W U LTC221/LTC222 DIGITAL A D DC ELECTRICAL CHARACTERISTICS The–● denotes the specifications which apply + over full operating temperature range, otherwise specifications are at TA = 25°C. V = ±15V, V = –15V, GND = 0V, unless noted. CONDITIONS ● PARAMETER I– AC ELECTRICAL CHARACTERISTICS V + = 15V, V – = – 15V, GND = 0V, unless otherwise noted. PARAMETER tON tOFF tOPEN Off Isolation Crosstalk Charge Injection OINJ Total Harmonic Distortion THD tON, WR tOFF, WR VS = 2Vp-p, RL = 1kΩ f = 100kHz RGEN = 0Ω, CL = 1000pF, VGEN = 0 VS = 2Vp-p, RL = 10kΩ VS = 2V, RL = 1kΩ, CL = 35pF 20 CONDITIONS VS = 2V, RL = 1kΩ, CL = 35pF LTC221M/LTC222M MIN TYP MAX 290 210 85 75 90 5 0.01 270 160 400 300 ±25 400 300 20 LTC221C/LTC222C MIN TYP MAX 290 210 85 75 90 8 0.01 270 160 400 300 ±25 pC % ns 400 300 ns dB UNITS ns The ● denotes the specifications which apply over full operating temperature range, otherwise specifications are at TA = 25°C. V + = 5V, V – = GND = 0V, unless noted. PARAMETER Analog Signal Range RON VS = 1.5V, 3V ID = 0.25mA Off Input Leakage IS (OFF) Off Output Leakage ID (0FF) ● DIGITAL A D DC ELECTRICAL CHARACTERISTICS CONDITIONS ● On Channel Leakage lD (ON) Input High Voltage VINH, VWRH Input Low Voltage VINL, VWRL Input High or Low Current IINH, IINL, IWRH, IWRL CS(OFF) CD (OFF) CD, CS (ON) I+ U U LTC221M/LTC222M MIN TYP MAX 0.1 5 10 LTC221C/LTC222C MIN TYP MAX 0.1 5 10 UNITS µA LTC221M/LTC222M MIN TYP MAX 0 280 0.01 ● LTC221C/LTC222C MIN TYP MAX 0 280 0.01 0.01 0.01 2.4 5 520 520 650 ±5 ± 100 ±5 ± 100 ±5 ± 200 0.8 ±1 5 12 30 UNITS V Ω Ω Ω nA nA nA nA nA nA V V µA pF pF pF 5 450 450 650 ±1 ± 100 0.01 ±1 ± 100 0.01 ±1 ± 200 TMIN 25°C TMAX VD = 4V, 1V; VS = 1V, 4V (Note 4) VD = VS = 1V, 4V (Note 4) ● ● ● 2.4 0.8 ±1 5 12 30 VIN = 5V, 0V VWR = 5V, 0V ● All Channels On or Off VIN = VWR = 0V or 4.0V ● 8 20 30 8 20 30 µA µA 2212fa 3 LTC221/LTC222 AC ELECTRICAL CHARACTERISTICS PARAMETER tON tOFF tOPEN Off Isolation Crosstalk Charge Injection OINJ Total Harmonic Distortion THD tON, WR tOFF, WR Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Signals on S, D, or IN exceeding V + or V – will be clamped by internal diodes. Limit forward diode current to maximum current rating. VS = 2VP-P, RL = 1kΩ f = 100kHz RGEN = 0Ω, CL = 1000pF, VGEN = 2.5V VS = 2VP-P, RL = 10kΩ VS = 2V, RL = 1kΩ, CL = 35pF 100 CONDITIONS VS = 2V, RL = 1kΩ, CL = 35pF V + = 5V, V – = GND = 0V, unless otherwise noted. LTC221M/LTC222M MIN TYP MAX 450 190 250 75 90 2 0.01 430 160 600 300 600 300 100 LTC221C/LTC222C MIN TYP MAX 450 190 250 75 90 2 0.01 430 160 600 300 600 300 UNITS ns ns ns dB dB pC % ns ns Note 3: In-circuit ESD on the switch pins (S or D) exceeds 4kV (see test circuit). Note 4: Leakage current with a 5V supply is guaranteed by correlation with the ±15V leakage current. TYPICAL PERFOR A CE CHARACTERISTICS RON vs VS Over Supply Voltage 250 200 TA = 25°C ID = 1mA VSUPPLY = 5V, OV 100 80 RON (Ω) RON (Ω) RON (Ω) 150 ±5V 100 ±10V 50 ±15V ±20V 0 –20 –16 –12 –8 –4 04 VS (V) 8 12 16 20 LTC221/222 • TPC01 Positive Supply Current vs Logic Input Voltage 250 ALL LOGIC INPUTS TIED TOGETHER 200 V + = 15V V – = – 15V TA = 25°C 150 I+(µA) ALL INX TIED TOGETHER WR TIED TO GROUND 100 I+(µA) 50 0 0 3 4 UW 6 VIN (V) 9 RON vs VS Over Temperature 125°C RON vs VS Over Temperature V + = 5V 500 V – = 0V ID = 1mA 400 125°C 25°C 60 40 25°C 300 200 –55°C 20 V + = 15V V – = – 15V ID = 1mA 100 –55°C 0 –15 –12 –9 –6 –3 0 0 3 6 9 12 15 0 1 2 VS (V) 3 4 5 VS (V) LTC221/222 • TPC02 LTC221/222 • TPC03 Positive Supply Current vs Logic Input Voltage 250 V + = 5V V – = 0V TA = 25°C ALL LOGIC INPUTS TIED TOGETHER 200 150 ALL INX TIED TOGETHER WR TIED TO GROUND 100 50 12 15 0 0 1 2 VIN (V) 3 4 5 2212fa LTC221/222 • TPC04 LTC221/222 • TPC05 LTC221/LTC222 APPLICATIO S I FOR ATIO Switching Time Test Circuit Switch output waveform shown for VS = constant with logic input waveform as shown. Note that VS may be (+) or (–) as per switching time test circuit. VO is the steady LTC222 LOGIC INPUT 3V tr < 20ns tr < 20ns OV LTC221 LOGIC INPUT 3V tr < 20ns tr < 20ns OV SWITCH INPUT VS LOGIC "1" = SW ON 50% LOGIC "0" = SW ON 50% VO tON 0.9 VO tOFF SWITCH OV OUTPUT LTC221/222 • AI01 RGEN SX DX VO CL = 1000pF INX VGEN LTC221/222 • AI03 OIRR-Off Isolation Test Circuit C 15V SIGNAL GENERATOR VS = 2VP-P f = 100kHz CHAN A ANALYZER CHAN B RL 1k C = 0.001µF//0.1µF CHIP CAPACITORS VS VD VS V+ INX VD GND V– OIRR = 20 LOG C –15V LTC221/222 • AI05 U state output switch on. Feedthrough via gate capacitance may result in spikes at leading and trailing edge of output waveform. Switching Time Test Circuit SWITCH INPUT VS = 2V IN1 LOGIC INPUT RL 1k S1 D1 SWITCH OUTPUT VO CL 35pF VO = V S RL RL+ RDS(ON) W UU 0.9 (REPEAT TEST FOR IN2, IN3 AND IN4) LTC221/222 • AI02 Charge Injection Test Circuit ∆VO VO 3V LTC221 INX OV 3V LTC222 INX OV ON ON OFF OFF ON ON ∆VO IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION. THE ERROR VOLTAGE IN COULOMBS IS ∆Q = VL • ∆VO LTC221/222 • AI04 CCRR-Channel to Channel Crosstalk Test Circuit C 15V SIGNAL GENERATOR VS = 2Vp-p f = 100kHz VIN VS1 V+ VL VD1 50Ω IN1 CHAN A ANALYZER CHAN B VIN RL 1k C = 0.001µF//0.1µF CHIP CAPACITORS VS1 VD2 IN2 VIN VD2 GND V– VS2 NC OIRR = 20 LOG C –15V LTC221/222 • AI06 2212fa 5 LTC221/LTC222 APPLICATIO S I FOR ATIO ANY SOURCE OR DRAIN PIN ESD TESTER 1.5k S OR D LTC221/ LTC222 V+ 15V ±4kV 100pF PER MIL-STD-883C METHOD 3015.2 LTC221/222 • TA07 WR Switching Time Test Circuit WR 3V 50% 0V 3V LTC221 IN 0V 3V LTC222 IN 0V VS VO 0V tON WR LOGIC INPUT tr < 20ns tr < 20ns tOFF WR LTC221/222 • AI08 50% VO 0.9 VO 0.9 WR Setup Conditions 3V WR OV 3V LTC221 IN OV 3V LTC222 IN OV LTC221/222 • AI10 1.5V tWW tDW 1.5V tWD 0.8V 0.8V 2.4V 2.4V 6 U In-Circuit ESD Test Circuit 0.1µF POWER APPLIED OR OPEN CIRCUT V– 0.1µF –15V GND LOGIC INPUT SWITCH INPUT VS = 2V LOGIC INPUT S1 WR 15V V+ D1 RL 1k SWITCH OUTPUT VO CL 35pF IN1 GND OV VO = V S V– –15V RL RL+ rDS(ON) LTC221/222 • AI09 W UU (REPEAT TEST FOR IN2, IN3 AND IN4) WR/Input Minimum Timing Requirements PARAMETER tWW tDW tWD Write Pulse Width Data Valid to Write Data Valid After Write MIN LIMIT 230 180 30 UNITS ns ns ns 2212fa LTC221/LTC222 APPLICATIO S I FOR ATIO U SERIAL PORT 15V 15V LTC221/ LTC222 5V LT1027 D1 20kΩ 15V S1 S2 D2 10kΩ S3 D3 4.99kΩ S4 D4 2.49kΩ TO MICROCONTROLLER e.g. HD64180 IN1 IN2 IN3 IN4 WR V– WR GND LOGIC DECODER ADDRESS BUS LTC221/222 • AI11 CH0 CH1 CH2 VIN OV – 5V CH3 CH4 CH5 CH6 CH7 COM DGND LTC1090 VCC ACLK SCLK DIN DOUT CS REF+ REF – V– AGND 5V W UU Auto Ranging an 8-Channel, 10-Bit A/D Converter + LT1006 – DATA BUS B0 – B3 2212fa 7 LTC221/LTC222 APPLICATIO S I FOR ATIO 8-Channel, 14-Bit A/D Converter CH0 CH1 CH2 VIN 0V TO 5V CH3 CH4 CH5 CH6 CH7 COM DGND 15V S1 S2 S3 S4 LTC221/ LTC222 D1 D2 D3 D4 IN1 IN2 IN3 IN4 WR V– WR GND LOGIC DECODER ADDRESS BUS LTC221/222 • AI12 ACLK SCLK DIN DOUT LTC1090 CS REF+ REF – V– AGND 5V SERIAL PORT 8 U 1kΩ 1kΩ 1kΩ LT1027 15V 1kΩ TO MICROCONTROLLER e.g. TMS370 DATA BUS B0 – B3 2212fa W UU LTC221/LTC222 PACKAGE DESCRIPTIO U J Package 16-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) .840 (21.336) MAX 16 15 14 13 12 11 10 9 .005 (0.127) MIN .025 (0.635) RAD TYP 1 2 3 4 5 6 7 8 .200 (5.080) MAX .015 – .060 (0.380 – 1.520) .220 – .310 (5.588 – 7.874) .125 (3.175) MIN .045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660) .100 (2.54) BSC J16 0801 CORNER LEADS OPTION (4 PLCS) .023 – .045 (0.584 – 1.143) HALF LEAD OPTION .045 – .065 (1.143 – 1.65) FULL LEAD OPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) 0° – 15° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS OBSOLETE PACKAGE 2212fa 9 LTC221/LTC222 PACKAGE DESCRIPTIO U N Package 16-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .770* (19.558) MAX 16 15 14 13 12 11 10 9 .255 ± .015* (6.477 ± 0.381) 1 2 3 4 5 6 7 8 .130 ± .005 (3.302 ± 0.127) .020 (0.508) MIN .045 – .065 (1.143 – 1.651) .065 (1.651) TYP .125 (3.175) MIN .018 ± .003 (0.457 ± 0.076) .100 (2.54) BSC N16 0502 .300 – .325 (7.620 – 8.255) .009 – .015 (0.229 – 0.381) +.035 .325 –.015 +0.889 8.255 –0.381 ( ) INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) NOTE: 1. DIMENSIONS ARE 2212fa 10 LTC221/LTC222 PACKAGE DESCRIPTIO S Package 16-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .386 – .394 (9.804 – 10.008) NOTE 3 16 15 14 13 12 11 10 9 .045 ±.005 .050 BSC N .245 MIN .160 ±.005 .228 – .244 (5.791 – 6.197) 1 2 3 N/2 N/2 .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT 1 .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0° – 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U N .150 – .157 (3.810 – 3.988) NOTE 3 2 3 4 5 6 7 8 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) .014 – .019 (0.355 – 0.483) TYP .050 (1.270) BSC S16 0502 2212fa 11 LTC221/LTC222 RELATED PARTS PART NUMBER LTC1380/LTC1393 LTC1390/LTC1391 DESCRIPTION 8-Channel/4-Channel Analog Multiplexer with SMBus Interface 8-Channel, Analog Multiplexer with Serial Interface COMMENTS 3V to ±15V, 8 Single Ended/4 Differential Inputs 3V to ±15V Operation LTC201/LTC202/LTC203 Micropower, Low Charge Injection, Quad CMOS Analog Switches DG201/DG202 Compatible 2212fa 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● LW/TP 1002 1K REV A • PRINTED IN USA www.linear.com  LINEAR TECHNOLOGY CORPORATION 1991