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| INTEGRATED CIRCUITS SA58780 Sense current amplifier with selectable gain Product data Supersedes data of 2002 Dec 10 2003 Nov 10 Philips Semiconductors Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 GENERAL DESCRIPTION The SA58780 is a single amplifier that allows current sensing independent of the supply voltage. The input offset voltage is typically 500 V with typical offset drift of 6 V/C. The SA58780 supply current is typically 150 A and it operates from 3.0 V to 24 V single supply. The input common mode range is selectable for high and low ranges. The amplifIer gain is user selected for a "High" of 100 V/V or a "Low" of 50 V/V. The SA58780 is ideal for battery charger applications in notebook computers and PDAs. FEATURES * Supply voltage range: 3 V to 24 V * Low supply current: 150 A (typical) * Low input offset voltage: 500 V (typical) * Low input offset drift: 6 V/C (typical) * Power supply rejection ratio (1 kHz): 80 dB (typical) * Common mode rejection ratio (1 kHz): 100 dB (typical) * Common mode input range selection: * Amplifier gain selection: 1.8 V to 24 V (ISEL HIGH); -0.3 V to VCC - 2.4 V (ISEL LOW) GSEL HIGH: GV = 100 V/V; GSEL LOW: GV = 50 V/V APPLICATIONS * Notebook computers * Personal digital assistants (PDA) SIMPLIFIED DEVICE DIAGRAM TO CHARGE RS ISEL 1 INPUT CONTROL HIGH IN- 2 H V/I CONVERTER IN+ 3 LOW R 200 k L R 194 k R 6 k R 15 k R 5 k H R 55 k L OUT TO BATTERY SA58780 GAIN CONTROL 8 GSEL 7 VCC 6 R 10 k R 6 k TO ADC GND 4 H R 5 k L R 55 k 5 COM VCOM SL01575 Figure 1. Simplified device diagram. 2003 Nov 10 2 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 ORDERING INFORMATION PACKAGE TYPE NUMBER SA58780D NAME SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm VERSION SOP005 TEMPERATURE RANGE -40 C to +85 C PIN CONFIGURATION TOP VIEW ISEL IN- IN+ GND 1 8 GSEL VCC OUT COM SA58780D 2 3 4 7 6 5 SL01572 Figure 2. Pin configuration. PIN DESCRIPTION AND EQUIVALENT CIRCUITS PIN 1 SYMBOL ISEL DESCRIPTION Input common mode range selection HIGH: 1.8 V to 24 V LOW: -0.3 V to VCC - 2.4 V VCC 7 INTERNAL EQUIVALENT CIRCUIT 4 GND Ground ISEL 1 GND 4 2 IN- Inverting input IN- 2 3 IN+ Non-inverting input IN+ 3 5 COM Reference voltage input VCC 7 COM 5 2003 Nov 10 3 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 PIN 6 SYMBOL OUT Output DESCRIPTION INTERNAL EQUIVALENT CIRCUIT VCC 7 7 VCC Positive supply 6 OUT GND 4 8 GSEL Gain selection HIGH: 100 V/V LOW: 50 V/V VCC 7 GSEL 8 GND 4 MAXIMUM RATINGS SYMBOL VCC VIN Tstg Tamb PD Single supply voltage Input voltage Storage temperature Operating ambient temperature Power dissipation PARAMETER MIN. -0.3 -0.3 -40 -40 - MAX. +25 +25 +125 +85 300 UNIT V V C C mW 2003 Nov 10 4 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 ELECTRICAL CHARACTERISTICS VCC = 5.0 V; VICM = 15 V; VCOM = 25 V; VISEL = 5 V; VGSEL = 5 V; RL = 10 k; Tamb = 25 C, unless otherwise specified. SYMBOL VCC ICC Gv(high) Gv(low) VIO1 VIO2 VIO1 VIO2 VI(CM)1 VI(CM)2 VI(dif) Ii(bias)1 Ii(bias)2 VIO/T Zi VCOM IISEL VISEL1 VISEL2 IGSEL VGSEL1 VGSEL2 VOUT IO(source) IO(sink) fC1 fC2 PSRR1 PSRR2 CMRR1 CMRR2 PARAMETER Supply voltage operating range Supply current Voltage gain HIGH Voltage gain LOW Input offset voltage 1 Input offset voltage 2 Input offset voltage 1 temperature coefficient Input offset voltage 1 temperature coefficient Common mode input voltage range 1 Common mode input voltage range 1 Differential input voltage Input bias current 1 Input bias current 2 Input offset voltage temperature drift Input impedance COM voltage range ISEL current ISEL voltage range 1 (HIGH) ISEL voltage range 2 (LOW) GSEL sink current GSEL voltage range 1 GSEL voltage range 2 Output voltage range Output source current Output sink current Cutoff frequency 1 Cutoff frequency 2 Power supply rejection ratio 1 Power supply rejection ratio 2 Common mode rejection ratio 1 Common mode rejection ratio 2 VGSEL = 5 V (100 V/V) (50 V/V) RL = open VOUT = VCC - 0.3 V VOUT = 0.3 V VGSEL = 5 V (Gv(high) = 100 V/V); VOUT = -3 dB VGSEL = 0 V (Gv(low) = 50 V/V); VOUT = -3 dB f = 1 kHz; VISEL = 5 V f = 1 kHz; VISEL = 0 V f = 1 kHz; VISEL = 5 V f = 1 kHz; VISEL = 0 V RL = open VISEL = 5 V VIN = 0 V; VISEL = 5 V (HIGH) VIN = 0 V; VISEL = 0 V (LOW) Tamb = -40 to +85 C GSEL = 5 V GSEL = 0 V VIN = 0 V; VISEL = 5 V (HIGH) VIN = 0 V; VISEL = 0 V (LOW) VISEL = 5 V VISEL = 0 V VISEL = 5 V (HIGH) VISEL = 0 V (LOW) CONDITIONS MIN. 3.0 - 97 48.5 -0.5 -0.5 -4 -6 1.8 -0.3 -200 0.8 -0.8 - 100 1.2 - 1.7 0 - 1.7 0 0.3 0.5 -0.5 - - 70 70 70 70 TYP. - 150 100 50 - - - - - - - 1.2 -1.2 1 - - 1.0 - - 1.0 - - - 1.0 -1.0 100 140 80 80 80 80 MAX. 24 200 103 51.5 0.5 0.5 4 6 24 VCC - 2.4 200 1.6 -1.6 3 - VCC - 1.2 - 24 0.5 - 24 0.5 VCC - 0.3 - - - - - - - - UNIT V A mV/mV mV/mV mV mV V/C V/C V V mV A A V/C k V A V V A V V V mA mA kHz kHz dB dB dB dB 2003 Nov 10 5 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. 180 VOLTAGE GAIN HIGH, GV(high) , (mV/mV) 100.8 100.6 100.4 100.2 100.0 99.8 99.6 99.4 -40 VGSEL = 5 V VISEL = 5 V SUPPLY CURRENT, ICC (mA) 160 140 120 100 -40 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01963 AMBIENT TEMPERATURE, Tamb (C) SL01964 Figure 3. Supply current versus ambient temperature. Figure 4. Voltage Gain 1 (HIGH) versus ambient temperature. 100.8 VOLTAGE GAIN HIGH, GV(high) , (mV/mV) VOLTAGE GAIN LOW, GV(low), (mV/mV) VGSEL = 5 V VISEL = 0 V 100.4 50.6 VGSEL = 0 V VISEL = 5 V 50.4 50.2 100.0 50.0 99.6 49.8 99.2 49.6 98.8 -40 -20 0 20 40 60 80 100 49.4 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01965 AMBIENT TEMPERATURE, Tamb (C) SL01966 Figure 5. Voltage Gain 1 (HIGH) versus ambient temperature. Figure 6. Voltage Gain 2 (LOW) versus ambient temperature. 51.0 VOLTAGE GAIN LOW, GV(low) , (mV/mV) INPUT OFFSET VOLTAGE 1, VIO1 (mV) VGSEL = 0 V VISEL = 0 V 50.5 0.10 VIN = 0 V VISEL = 5 V 0.05 0 50.0 -0.05 -0.10 49.5 -0.15 49.0 -40 -20 0 20 40 60 80 100 -0.20 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01979 AMBIENT TEMPERATURE, Tamb (C) SL01967 Figure 7. Voltage Gain 2 (LOW) versus ambient temperature. Figure 8. Input offset voltage 1 versus ambient temperature. 2003 Nov 10 6 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. 0.100 INPUT OFFSET VOLTAGE 2, VIO2 (mV) VIN = 0 V VISEL = 0 V 1.6 INPUT BIAS CURRENT 1, II(bias)1 ( A) VIN = 0 V VISEL = 5 V 1.4 0.075 0.050 1.2 0.025 1.0 0 -0.025 0.8 -0.050 -40 -20 0 20 40 60 80 100 0.6 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01980 AMBIENT TEMPERATURE, Tamb (C) SL01981 Figure 9. Input offset voltage 1 versus ambient temperature. -0.6 Figure 10. Input bias current versus ambient temperature. 2.0 INPUT COMMON MODE VOLTAGE RANGE 1, V ICM1 (V) INPUT BIAS CURRENT 2, II(bias)2 ( A) VIN = 0 V VISEL = 0 V -0.8 VISEL = 5 V 1.8 1.6 -1.0 1.4 1.2 -1.2 1.0 -1.4 -40 -20 0 20 40 60 80 100 0.8 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01982 AMBIENT TEMPERATURE, Tamb (C) SL01983 Figure 11. Input bias current versus ambient temperature. Figure 12. Input common mode voltage (minimum) versus ambient temperature. 6 INPUT COMMON MODE VOLTAGE RANGE 2, V ICM2 (V) 4 VISEL = 0 V 3 MAXIMUM 2 COM VOLTAGE RANGE, VCOM (V) RL = OPEN 5 MAXIMUM 4 1 3 0 MINIMUM 2 MINIMUM 1 -1 -2 -40 -20 0 20 40 60 80 100 0 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01984 AMBIENT TEMPERATURE, Tamb (C) SL01985 Figure 13. Input common mode voltage range 2 versus ambient temperature. Figure 14. COM voltage range versus ambient temperature. 2003 Nov 10 7 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. 6 MAXIMUM OUTPUT SOURCE CURRENT, IO(source) (mA) RL = OPEN OUTPUT VOLTAGE RANGE, V OUT (V) 5 5.0 VOUT = VCC - 0.3 V 4.5 4 4.0 3 3.5 2 3.0 1 MINIMUM 2.5 0 -40 -20 0 20 40 60 80 100 2.0 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01986 AMBIENT TEMPERATURE, Tamb (C) SL01987 Figure 15. Output voltage range versus ambient temperature. Figure 16. Output source current versus ambient temperature. 2.5 VOUT = 0.3 V OUTPUT SINK CURRENT, I O(sink) (mA) 2.0 I SEL SINK CURRENT, IISEL (mA) 1.4 VISEL = 5 V 1.2 1.5 1.0 1.0 0.8 0.5 0 -40 -20 0 20 40 60 80 100 0.6 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01988 AMBIENT TEMPERATURE, Tamb (C) SL01989 Figure 17. Output sink current versus ambient temperature. Figure 18. ISEL sink current versus ambient temperature. 1.90 1.4 VGSEL = 5 V GSEL SINK CURRENT, IGSEL (mA) I SEL VOLTAGE RANGE 1, (HIGH), V ISEL1 (V) VISEL = 5 V 1.85 1.80 1.75 1.70 1.65 1.60 1.55 -40 1.2 1.0 0.8 0.6 -40 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01990 AMBIENT TEMPERATURE, Tamb (C) SL01995 Figure 19. GSEL sink current versus ambient temperature. Figure 20. ISEL voltage range 1 versus ambient temperature. 2003 Nov 10 8 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. 1.3 VISEL = 0 V 1.1 G SEL VOLTAGE RANGE 1, VGSEL1 (V) I SEL VOLTAGE RANGE 2, V ISEL2 (V) 1.4 VGSEL = 5 V 1.2 0.9 1.0 0.7 0.8 0.5 0.3 -40 -20 0 20 40 60 80 100 0.6 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01996 AMBIENT TEMPERATURE, Tamb (C) SL01997 Figure 21. ISEL voltage range 2 versus ambient temperature. 2.5 VGSEL = 0 V G SEL VOLTAGE RANGE 2, V GSEL2 (V) 2.1 Figure 22. GSEL voltage range 1 versus ambient temperature. COMMON MODE REJECTION RATIO 1, CMRR1 (dB) 85 VISEL = 5 V 83 1.7 81 1.3 79 0.9 77 0.5 -40 -20 0 20 40 60 80 100 75 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL01998 AMBIENT TEMPERATURE, Tamb (C) SL01999 Figure 23. GSEL voltage range 2 versus ambient temperature. Figure 24. Common mode rejection ratio 1 versus ambient temperature. POWER SUPPLY REJECTION RATIO 1, PSRR1 (dB) 106 VISEL = 5 V COMMON MODE REJECTION RATIO 2, CMRR2 (dB) 92 VISEL = 0 V 90 102 88 98 86 94 84 82 -40 -20 0 20 40 60 80 100 90 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL02000 AMBIENT TEMPERATURE, Tamb (C) SL02020 Figure 25. Common mode rejection ratio 2 versus ambient temperature. Figure 26. Power supply rejection ratio 1 versus ambient temperature. 2003 Nov 10 9 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. POWER SUPPLY REJECTION RATIO 2, PSRR2 (dB) 95 VISEL = 0 V CUTOFF FREQUENCY 1, f C1 (kHz) 94 120 130 VGSEL = 5 V VISEL = 5 V 110 93 100 92 90 91 80 90 -40 -20 0 20 40 60 80 100 70 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL02021 AMBIENT TEMPERATURE, Tamb (C) SL02022 Figure 27. Power supply rejection ratio 2 versus ambient temperature. 120 CUTOFF FREQUENCY 1, f C1 (kHz) 115 110 105 100 95 90 85 80 -40 VGSEL = 5 V VISEL = 0 V Figure 28. Cutoff frequency 1 versus ambient temperature. 146 VGSEL = 0 V VISEL = 5 V 144 CUTOFF FREQUENCY 2, fC2 (kHz) 0 20 40 80 100 142 140 138 -20 60 136 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE, Tamb (C) SL02023 AMBIENT TEMPERATURE, Tamb (C) SL02024 Figure 29. Cutoff frequency 1 versus ambient temperature. Figure 30. Cutoff frequency 2 versus ambient temperature. 150 VGSEL = 0 V VISEL = 0 V 146 MINIMUM OUTPUT VOLTAGE, V OUT(min) (V) 0.9 0.8 RL = OPEN 0.7 RL = 20 k 0.6 RL = 10 k 0.5 RL = 5.1 k 0.4 0.3 0.2 0.1 0 -20 0 20 40 60 80 100 1.0 1.5 2.0 2.5 AMBIENT TEMPERATURE, Tamb (C) COM VOLTAGE, VCOM (V) CUTOFF FREQUENCY 2, fC2 (kHz) 142 138 134 130 -40 SL02025 SL02026 Figure 31. Cutoff frequency 2 versus ambient temperature. Figure 32. Minimum output voltage versus COM voltage. 2003 Nov 10 10 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 k; Tamb = 25 C; unless otherwise specified. 7 6 5 4 3 2 1 0 -250 INPUT BIAS CURRENT, II(bias) ( A) -150 -50 50 150 250 INPUT DIFFERENTIAL VOLTAGE, VIDF (mV) SL02027 Figure 33. Input bias current versus input differential voltage. APPLICATION INFORMATION Battery current sensing circuit The circuit shown in Figure 34 will sense when the load is drawing current from the battery, and the output of Pin 6 to an analog-to-digital converter can be used to provide a digital readout. Pin 8, the Gain Select, is tied to ground. This gives a fixed Gv of 50 V/V. For a fixed Gv of 100 V/V, tie Pin 8 to VCC. For selectable gain, Pin 8 may be connected to a user-controlled selector switch or the output of another device that will change state as the current rises and falls. Charger current sensing The only difference between the battery and charge current sense circuits is the diode position. 20 M RS TO CHARGER CIRCUIT 1 8 20 M RS TO CHARGER CIRCUIT 2 7 TO ADC 3 1 8 BATTERY 4 2 7 2.5 V TO ADC 3 BATTERY 4 5 2.5 V 6 5 6 SL01574 Figure 35. Charger current sensing circuit. SL01573 Figure 34. Battery current sensing circuit. 2003 Nov 10 11 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 PACKING METHOD The SA58780 is packed in reels, as shown in Figure 36. GUARD BAND TAPE REEL ASSEMBLY TAPE DETAIL COVER TAPE CARRIER TAPE BARCODE LABEL BOX SL01305 Figure 36. Tape and reel packing method 2003 Nov 10 12 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 SO8: plastic small outline package; 8 leads; body width 3.9 mm SOP005 2003 Nov 10 13 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 REVISION HISTORY Rev _3 Date 20031110 Description Product data (9397 750 12303); ECN 853-2290 30333 of 09 September 2003. Supersedes data of 2002 Dec 10 (9397 750 10746). * Change package outline version to SOP005 in Ordering information table and Package outline sections. _2 _1 20021210 20011003 Product data (9397 750 10746); ECN 853-2290 29179 of 11 November 2002. Supersedes data of 2001 Oct 03 (9397 750 08982). Product data; initial version (9397 750 08982). ECN 853-2290 27197 of 03 October 2001. Modifications: 2003 Nov 10 14 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 Data sheet status Level I Data sheet status [1] Objective data Product status [2] [3] Development Definitions This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). II Preliminary data Qualification III Product data Production [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. Definitions Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes in the products--including circuits, standard cells, and/or software--described or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 (c) Koninklijke Philips Electronics N.V. 2003 All rights reserved. Printed in U.S.A. Date of release: 11-03 For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. Document order number: 9397 750 12303 Philips Semiconductors 2003 Nov 10 15 |
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