Datasheet

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LTC201A/LTC202/LTC203

201a23fb

■

Micropower Operation

■

Single 5V or ±15V Supply Operation

■

Low Charge Injection

■

Low R

■

Low Leakage

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Guaranteed Break Before Make

■

Latch Resistant Design

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TTL/CMOS Compatible

■

Improved Second Source for DG2O1A/DG202

The LTC

201A, LTC202, and LTC203 are micropower,

quad CMOS analog switches which typically dissipate only

250µW from ±15V supplies and 40µW from a single 5V

supply. The switches have 65Ω typical on resistance

and a very high off resistance. A break-before-make

characteristic, inherent in these switches, prevents the

shorting of two channels. With a supply voltage of ±15V,

the signal range is ±15V. These switches have special

charge compensation circuitry which greatly reduces

charge injection to a maximum of ±25pC (±15V supplies).

The LTC201A, LTC202, and LTC203 are designed for

applications such as programmable gain amplifiers,

analog multiplexers, sample-and-hold circuits, precision

charge switching and remote switching. These three

devices are differentiated by the type of switch action, as

shown in the logic table.

Micropower, Low Charge

Injection, Quad CMOS Analog Switches

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Supply Current ................... I

= 40µA, I

–

= 5µA Max

■

Charge Injection

±15V Supplies .................................±25pC Max

Single 5V Supply .................................. 2pC Typ

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............................................................. 65Ω Typ

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Signal Range .................................................... ±15V

Micropower 100Hz to 1MHz V-to-F Converter

FEATURES

DESCRIPTIO

KEY SPECIFICATIO S

TYPICAL APPLICATIO

–

IN2

IN3

IN1

IN4 V

–

GND

1.5M

OV TO 5V

50k

220k*

47k

10M3pF

2N3906

1N4148

100Ω

2N3904

12k

0.01µF

CLK

1µF

7V TO 10V

10k

100k

LT1004-2.5

500pF

POLYSTYRENE

0.022µF

2µF

LINEARITY IS 0.02%

QUIESCENT CURRENT IS 90µA

SUPPLY CURRENT IS 360µA AT 1MHz

*1%FILM RESISTOR

CD4024

LTC201A/LTC202

RESET

OUT

74C14

0.33µF

100Hz TRIM

(240k* TYP)

LTC201A/202/203•TA01

–

1/2 LT

1178

1/2 LT1178

, LTC and LT are registered trademarks of Linear Technology Corporation.

Summary of content (16 pages)

PAGE 1
LTC201A/LTC202/LTC203 Micropower, Low Charge Injection, Quad CMOS Analog Switches U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO The LTC®201A, LTC202, and LTC203 are micropower, quad CMOS analog switches which typically dissipate only 250µW from ±15V supplies and 40µW from a single 5V supply. The switches have 65Ω typical on resistance and a very high off resistance. A break-before-make characteristic, inherent in these switches, prevents the shorting of two channels.
PAGE 2
LTC201A/LTC202/LTC203 W W W AXI U U ABSOLUTE RATI GS U U W PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Voltages Referenced to V – V+ ........................................................................ 44V GND ..................................................................... 25V Digital Inputs, S, D (Note 2) ....... – 2V to (V + + 2V) or 20mA, Whichever Occurs First Current Any Input Except S or D ................................... 30mA Continuous S or D .....................................
PAGE 3
LTC201A/LTC202/LTC203 U 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. PARAMETER CONDITIONS Off Output Leakage ID (0FF) VD = ±14V, VS = ±14V Switch Off On Channel Leakage lD (ON) VD = VS = ±14V Switch On LTC201AM/LTC202M/ LTC203M MIN TYP MAX LTC201AC/LTC202C/ LTC203C MIN TYP MAX 0.01 ±1 ±100 0.01 ±5 ±100 nA nA 0.02 ±1 0.
PAGE 4
LTC201A/LTC202/LTC203 U 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 = 5V, V– = GND = 0V unless otherwise noted. PARAMETER LTC201AM/LTC202M/ LTC203M MIN TYP MAX CONDITIONS Analog Signal Range RON ● VS = ±1.5V, +3V ID = 0.
PAGE 5
LTC201A/LTC202/LTC203 U W TYPICAL PERFOR A CE CHARACTERISTICS RON vs VS Over Supply Voltage T = 25°C 250 I A = 1mA D RON vs VS Over Temperature VSUPPLY = 5V, 0V 100 ± 5V 25°C 60 ± 15V V + = 15V V – = – 15V ID = 1mA 20 ± 20V 8 0 – 15 – 12 – 9 – 6 – 3 12 16 20 0 0 3 VS(V) V + = 5V V – = 0V 9 – 10 V + = 15V – V = – 15V – 40 0 VS(V) 5 10 15 3 4 5 LT201_202_203 • TPC03 V + = 5V V – = 0V TA = 25°C ALL LOGIC INPUTS TIED TOGETHER 300 270 240 210 180 150 180 150 120 120 90 90 60
PAGE 6
LTC201A/LTC202/LTC203 U W U U 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 state output switch on. Feedthrough via gate capacitance may result in spikes at leading and trailing edge of output waveform.
PAGE 7
LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO OIRR-Off Isolation Test Circuit C SIGNAL GENERATOR CCRR-Channel to Channel Crosstalk Test Circuit C 15V SIGNAL GENERATOR VS V + VS = 2VP-P f = 100kHz CHAN A ANALYZER CHAN B OIRR = 20 LOG V– GND VIN C = 0.001µF//0.1µF CHIP CAPACITORS C – 15V VL IN2 CCRR = 20 LOG VIN VS2 NC V– GND LT201_202_203 • AI05 50Ω VD1 VD2 RL 1kΩ VO VD + VS1 V IN1 VIN VD RL 1kΩ C = 0.001µF//0.
PAGE 8
LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO Micropower, ±4.5V to ±15V, Voltage Inverter Using the LTC203 LTC203 10 13 3 VIN 5 330k 14 1 16 14 74C14 9 1MΩ 10µF VIN IQ 4.5V 15V 15µA 125µA 8 1000pF VOUT, NO LOAD 7 V+ 2 D3 S3 1µF GND S2 D2 15 IN3 IN2 IN1 IN4 S4 D4 V– 4 ROUT –4.494V(6mV Error) –14.975V(25mV Error) 11 S1 D1 6 VOUT = – VIN 1µF 1.
PAGE 9
LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO Ultra Low Noise, Low Drift Chopper Amplifier 15V 74C14 INPUT 10 D3 7 1 IN1 D4 16 IN2 9 8 IN3 IN4 14 S2 1MΩ 3 S1 1000pF LTC203 S3 11 S4 NC 6 V+ 12 15V 13 1µF V– GND 4 5 D2 D1 15 15V 2 100kΩ 15V – 15V + 1µF – + LT1097 OUTPUT LT1028 – – 15V 470pF 10kΩ 100kΩ – 15V 10Ω 0.47µF NOISE: 40nVP-P 0.1Hz TO 10Hz VOS: 1µV DRIFT: 0.
PAGE 10
LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO Bipolar (AC) Input V/F Converter 0.01µF* 3 S1 15V 6 1 IN1 S4 16 9 IN3 IN2 8 IN4 11 S3 15 D2 74C04 LTC203 D1 D4 2 1N4148 NC 12 7 V+ V– 13 GND 4 D3 5 10 0.1µF OUTPUT 0kHz TO 10kHz S2 14 15V 1N4148 2k LT1004-2.5 1N4148 10kΩ INPUT ± 10V 36.5kΩ 1%** – 15V 1N4148 15V 15V – + LT1056 – + 1kΩ 15V 15V 15V LT1012 A = 10 10k 3.6kΩ – 3.6k + – 15V LT1011 2N2369 1N4148 – 15V – 15V * POLYSTYRENE 50ppm/°C DRIFT 0.
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LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO Micropower Thermocouple Temperature to Frequency Converter 6V 0.02µF NC TYPE K THERMOCOUPLE “A” 6V +V K – + Q1 2N3904 – 100k 1M LT1025 GND 10k 6V + R– 6V Q2 2N3906 LT1049 74C14 100k C1 100pF 6.81kΩ** C4 300pF C3 0.47µF 100°C 1.5kΩ TRIM OUTPUT 0°C to 100°C D.C. to 1kHz 240k 6V 6.8µF 3 S1 14 S2 1 IN1 LT1004-1.
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LTC201A/LTC202/LTC203 U W U U APPLICATIO S I FOR ATIO Precision Current Sensing in Supply Rails 15V 74C14 IIN RSHUNT SHUNT CAN BE IN POSITIVE OR NEGATIVE SUPPLY LEAD 1MΩ VOUT 1000pF 1µF S1 S2 IN1 IN2 IN3 IN4 S3 S4 V+ V– GND D3 D4 15V – 15V LTC203 D1 D2 NC 1µF LT201_202_203 • AI15 Precision Voltage Divide by 2 Circuit VOUT = VIN/2 1µF VIN 4.
PAGE 13
LTC201A/LTC202/LTC203 U PACKAGE DESCRIPTIO J Package 16-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) .005 (0.127) MIN .023 – .045 (0.584 – 1.143) HALF LEAD OPTION .840 (21.336) MAX 16 15 14 13 12 11 10 9 .220 – .310 (5.588 – 7.874) .025 (0.635) RAD TYP .045 – .065 (1.143 – 1.65) FULL LEAD OPTION 1 2 3 4 5 6 7 8 .200 (5.080) MAX .300 BSC (7.62 BSC) .015 – .060 (0.380 – 1.520) .008 – .018 (0.203 – 0.
PAGE 14
LTC201A/LTC202/LTC203 U PACKAGE DESCRIPTIO 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 1 2 3 4 5 6 7 8 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE ) .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) .020 (0.508) MIN .065 (1.651) TYP .120 (3.048) MIN .100 (2.
PAGE 15
LTC201A/LTC202/LTC203 U 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 .045 ±.005 .050 BSC 16 N 15 14 13 12 11 10 9 N .245 MIN .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 1 .030 ±.005 TYP 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 – .020 × 45° (0.254 – 0.508) 2 3 4 5 6 .053 – .069 (1.346 – 1.752) .008 – .010 (0.203 – 0.254) NOTE: 1.
PAGE 16
LTC201A/LTC202/LTC203 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC221/LTC222 Micropower, Low Charge Injection, Quad CMOS Analog Switches Parallel Controlled with Data Latches LTC1380/LTC1393 8-Channel/4-Channel Differential Analog Multiplexer with SMBus Interface 3V to ±15V, RON = 35Ω Single-Ended/70Ω Differential LTC1390/LTC1391 8-Channel, Analog Multiplexer with Serial Interface 3V to ±15V, RON = 45Ω, Low Charge Injection LT1675/LT1675-1 250MHz, Triple and Single RGB Multiplexer 100MHz