Transformer Coupled ISOLATION AMPLIFIER

® 3656 Transformer Coupled ISOLATION AMPLIFIER FEATURES q INTERNAL ISOLATED POWER q 8000V ISOLATION TEST VOLTAGE q 0.5µA MAX LEAKAGE AT 120V, 60Hz q 3-PORT ISOLATION q IMR: 125dB REJECTION AT 60Hz q 1" x 1" x 0.25" CERAMIC PACKAGE APPLICATIONS q MEDICAL Patient Monitoring and Diagnostic Instrumentation q INDUSTRIAL Ground Loop Elimination and Off-ground Signal Measurement q NUCLEAR Input/Output/Power Isolation DESCRIPTION The 3656 was the first amplifier to provide a total isolation function, both signal and power isolation, in integrated circuit form. This remarkable advancement in analog signal processing capability was accomplished by use of a patented modulation technique and miniature hybrid transformer. Versatility and performance are outstanding features of the 3656. It is capable of operating with three completely independent grounds (three-port isolation). In addition, the isolated power generated is available to power external circuitry at either the input or output. The uncommitted op amps at the input and the output allow a wide variety of closed-loop configurations to match the requirements of many different types of isolation applications. Input Demodulator Pulse Generator + – Modulator Output Demodulator Input ISO Power Rectifiers and Filters Rectifiers and Filters Output ISO Power This product is covered by the following United States patents: 4,066,974; 4,103,267; 4,082,908. Other patents pending may also apply upon the allowance and issuance of patents thereon. The product may also be covered in other countries by one or more international patents corresponding to the above-identified U.S. patents. InternationalAirportIndustrialPark • MailingAddress:POBox11400,Tucson,AZ85734 • StreetAddress:6730S.TucsonBlvd.,Tucson,AZ 85706 • Tel:(520)746-1111 • Twx:910-952-1111 Internet:http://www.burr-brown.com/ • FAXLine:(800)548-6133(US/CanadaOnly) • Cable:BBRCORP • Telex:066-6491 • FAX:(520)889-1510 • ImmediateProductInfo:(800)548-6132 ® © 1987 Burr-Brown Corporation PDS-403G 1 Printed in U.S.A. January, 1997 3656 SBOS132 SPECIFICATIONS ELECTRICAL At +25°C, V± = 15VDC and 15VDC between P+ and P–, unless otherwise specified. 3656AG, BG, HG, JG, KG PARAMETER ISOLATION Voltage Rated Continuous(1), DC Test, 10s(1) Test, 60s(1) Rejection DC 60Hz, < 100Ω in I/P Com(2) 60Hz, 5kΩ in I/P Com(2) 3656HG 3656AG, BG, JG, KG Capacitance(1) Resistance(1) Leakage Current GAIN Equations Accuracy of Equations Initial(3) 3656HG 3656AG, JG, KG 3656BG vs Temperature 3656HG 3656AG, JG 3656BG, KG vs Time Nonlinearity External Supplies Used at Pins 12 and 16, 3656HG 3656AG, JG, KG 3656BG Internal Supplies Used for Output Stage OFFSET VOLTAGE(5), RTI Initial(3), 3656HG 3656AG, JG 3656BG, KG vs Temperature, 3656HG 3656JG 3656AG 3656KG 3656BG vs Supply Voltage 3656HG 3656AG, BG, JG, KG vs Current(6) vs Time AMPLIFIER PARAMETERS, Apply to A1 and A2 Bias Current(7) Initial vs Temperature vs Supply Offset Current(7) Impedance Common-Mode Input Noise Voltage fB = 0.05Hz to 100Hz fB = 10Hz to 10kHz Input Voltage Range(8) Linear Operation Internal Supply External Supply Output Current VOUT = ±5V ±15V External Supply Internal Supply VOUT = ±10V ±15V External Supply VOUT = ±2V, VP+, P– = 8.5V Internal Supply Quiescent Current CONDITIONS MIN TYP MAX UNITS G1 = 10V/V 3500 (1000) 8000 (3000) 2000 (700) 160 125 108 112 6 (6.3) 1012 (1012) 0.28 VDC VDC Vrms dB dB dB dB pF Ω µA 120V, 60Hz See Text G < 100V/V 0.5 1.5 1 0.3 480 120 60 0.02 (1 + log khrs.) % % % ppm/°C ppm/°C ppm/°C % RA + RF = RB ≥ 2MΩ Unipolar or Bipolar Output ±0.15 ±0.1 ±0.05 ±0.15 ±[4 + (40/G1)] ±[2 + (20/G1)] ±[1 + (10/G1)] ±[200 + (1000/G1)] ±[50 + (750/G1)] ±[25 + (500/G1)] ±[10 + (350/G1)] ±[5 + (350/G1)] ±[0.6 + (3.5/G1)] ±[0.3 + (2.1/G1)] ±[0.2 + (20/G1)] % % % % mV mV mV µV/°C µV/°C µV/°C µV/°C µV/°C mV/V mV/V mV/mA Bipolar Output Voltage Swing, Full Load(4) 15Vp between P+ and P– Supply between P+ and P– ±[0.1 + (10/G1)] ±[10 + (100/G1)] • (1 + log khrs.) µV 100 0.5 0.2 5 100 || 5 5 5 20 nA nA/°C nA/V nA MΩ || pF µVp-p µVrms V V mA mA mA ±5 Supply –5 ±5 ±2.5 ±2.5 ±1 150 450 mA µA ® 3656 2 SPECIFICATIONS ELECTRICAL (CONT) At +25°C, V± = 15VDC and 15VDC between P+ and P–, unless otherwise specified. 3656AG, BG, HG, JG, KG PARAMETER FREQUENCY RESPONSE ±3dB Response Full Power Slew Rate Settling Time OUTPUT Noise Voltage (RTI) Residual Ripple(9) POWER SUPPLY IN, at P+, P– Rated Performance Voltage Range(10) Ripple Current(9) Quiescent Current(11) Current vs Load Current(12) CONDITIONS Small Signal Direction Measured at Output to 0.05% fB = 0.05Hz to 100Hz fB = 10Hz to 10kHz +0.1, –0.04 500 √(5)2 + (22/G1)2 √(5)2 + (11/G1)2 5 15 Derated Performance Average vs Current from +V, –V, V+, V– 8.5 7 8.5 10 14 0.7 9 8 0.66 40 80 –25 0 –55 –65 16 25 18 MIN TYP 30 1.3 MAX UNITS kHz kHz V/µs µs µVp-p µVrms mVp-p VDC VDC mAp-p mA/DC mA/mA V V V/V mVp-p mVp-p °C °C °C °C ISOLATED POWER OUT, At +V, –V, V+, V– pins(13) Voltage, No Load 15V Between P+ and P– Voltage, Full Load ±5mA (10mA sum) Load(12) Voltage vs Power Supply vs Supply Between P+ and P– Ripple Voltage(9) No Load Full Load ±5mA Load TEMPERATURE RANGE Specification 3656AG, BG 3656HG, JG, KG Operation(10) Storage(14) 9.5 9 200 +85 +70 +100 +125 NOTES: (1) Ratings in parenthesis are between P- (pin 20) and O/P Com (pin 17). Other isolation ratings are between I/P Com and O/P Com or I/P Com and P–. (2) See Performance Curves. (3) May be trimmed to zero. (4) If output swing is unipolar, or if the output is not loaded, specification same as if external supply were used. (5) Includes effects of A1 and A2 offset voltages and bias currents if recommended resistors used. (6) Versus the sum of all external currents drawn from V+, V–, +V, –V (= ISO). (7) Effects of A1 and A2 bias currents and offset currents are included in Offset Voltage specifications. (8) With respect to I/P Com (pin 3) for A1 and with respect to O/P Com (pin 17) for A2. CMR for A1 and A2 is 100dB, typical. (9) In configuration of Figure 3. Ripple frequency approximately 750kHz. Measurement bandwidth is 30kHz. (10) Decreases linearly from 16VDC at 85°C to 12VDC at 100°C. (11) Instantaneous peak current required from pins 19 and 20 at turn-on is 100mA for slow rising voltages (50ms) and 300mA for fast rises (50µs). (12) Load current is sum drawn form +V, –V, V+, V– (= IISO). (13) Maximum voltage rating at pins 1 and 4 is ±18VDC; maximum voltage rating at pins 12 and 16 is ±18VDC. (14) Isolation ratings may degrade if exposed to 125°C for more than 1000 hours or 90°C for more than 50,000 hours. Example of the ratings for 3-port continuous isolation. 20 PACKAGE INFORMATION PRODUCT 3656 PACKAGE 20-Lead ISO Omni PACKAGE DRAWING NUMBER(1) 102A 3500VDC 3 1000VDC 3500VD C 17 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. PIN DESIGNATIONS NO. 1 2 3 4 5 6 7 8 9 10 DESCRIPTION +V MOD Input Input DEMOD COM –V Balance A1 Inverting Input A1 Noninverting Input Balance A1 Output Input DEMOD NO. 11 12 13 14 15 16 17 18 19 20 DESCRIPTION Output DEMOD V– A2 Noninverting Input A2 Inverting Input A2 Output V+ Output DEMOD COM No Pin P+ P– ABSOLUTE MAXIMUM RATINGS Supply Without Damage ...................................................................... 16V Input Voltage Range Using Internal Supply ......................................... ±8V Input Voltage Range Using External Supply ................................... Supply Continuous Isolation Voltage(1) ..................................... 3500, (1000) VDC Storage Temperature ...................................................... –65°C to +125°C Lead Temperature, (soldering, 10s) .............................................. +300°C NOTE: (1) Ratings in parenthesis are between P– (pin 20) and O/P Com (pin 17). Other isolation ratings are between I/P Com and O/P Com or I/P Com and P–. ® 3 3656 TYPICAL PERFORMANCE CURVES All specifications typical at +25°C, unless otherwise specified. SMALL SIGNAL FREQUENCY RESPONSE 5 G1 = 10 0 G1 = 1 Relative Gain (dB) Phase Shift (°C) 30 0 30 60 90 120 150 180 210 240 G1 = 100 PHASE RESPONSE G1 = 1 G1 = 10 –5 G1 = 1000 –10 –15 –20 –25 –30 VP = 15V V+, V– = +15V, –15V VOUT = 300mVrms G2 = 2 300 1k 3k Frequency (Hz) 10k 30k 100k G1 = 100 G1 = 1000 VP = 15V V+, V– = +15V, –15 VOUT = 300mVrms 100 270 100 1k Frequency (Hz) 10k 100k OUTPUT SWING vs SUPPLY VOLTAGE 11 7 OUTPUT SWING AND DISTORTION vs FREQUENCY 7 Output Swing Distortion 6 G = 1000 5 4 G = 100 3 2 G = 10 1 0 G=1 10 100 1k Frequency (Hz) 10k 50k 1 0 Harmonic Distortion (%) Output Voltage (±V) Output Voltage (±V) 9 7 A 5m 5V 1 =± V) =± (± V± = 2 ext. G 2 Ω, k =3 RL 6 5 4 3 2 5 or t. V± 15V Ω, in = 2k ±=± V RL ext. kΩ, 1 RL = A ) = 5m 1 (±V )= 1 (±V 0 3 8 10 12 14 16 Power Supply Voltage P± (V) OUTPUT VOLTAGE SWING vs TEMPERATURE AND ISOLATED SUPPLY LOAD 9 IISO = 0, +VOUT Output Voltage (±V) Derated Vp± NOISE VOLTAGE vs FREQUENCY 10k RB = 2MΩ 7 IISO = 0, –VOUT 5 IISO = max, +VOUT IISO = max, –VOUT 3 IISO (see note 12 of electrical specs) 1 –75 –55 –50 –25 0 25 50 Noise Voltage (nV/ Hz) 1k Output Stage 100 Input Stage 10 75 85 100 0.1 1 10 100 Frequency (Hz) 1k 10k 100k Temperature (°C) ® 3656 4 TYPICAL PERFORMANCE CURVES (CONT) All specifications typical at +25°C, unless otherwise specified. Maximum Recommended IISO Current (±mA) QUIESCENT CURRENT vs TEMPERATURE Normalized Quiescent Current (at VP+P–) ISOLATED OUTPUT VOLTAGE AND CURRENT vs TEMPERATURE 8 16 Isolated Voltage Output (±V) ® 2.2 1.8 6 12 1.4 Derated Vp± 4 ±V at IISO = 0 ±V at IISO = max Derated Vp± 8 1 2 Voltage Current 0 –75 –55 –50 –25 0 25 50