INTEGRATED CIRCUITS SA58780 Sense current amplifier with selectable gain Product data Supersedes data of 2002 Dec 10 2003 Nov 10 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 µV with typical offset drift of ±6 µV/°C. The SA58780 supply current is typically 150 µA 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 APPLICATIONS • Supply voltage range: 3 V to 24 V • Low supply current: 150 µA (typical) • Low input offset voltage: ±500 µV (typical) • Low input offset drift: ±6 µV/°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: • Notebook computers • Personal digital assistants (PDA) 1.8 V to 24 V (ISEL HIGH); –0.3 V to VCC – 2.4 V (ISEL LOW) • Amplifier gain selection: GSEL HIGH: GV = 100 V/V; GSEL LOW: GV = 50 V/V SIMPLIFIED DEVICE DIAGRAM TO CHARGE RS TO BATTERY ISEL 1 INPUT CONTROL GAIN CONTROL SA58780 HIGH 2 H R 6 kΩ V/I CONVERTER L R 15 kΩ 3 LOW GND GSEL R 194 kΩ IN– IN+ 8 R 200 kΩ R 5 kΩ R 55 kΩ 7 L H 6 R 10 kΩ L H 4 R 6 kΩ VCC R 5 kΩ 5 R 55 kΩ OUT TO ADC 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 DESCRIPTION VERSION TEMPERATURE RANGE SO8 plastic small outline package; 8 leads; body width 3.9 mm SOP005 –40 °C to +85 °C PIN CONFIGURATION TOP VIEW ISEL 1 2 3 GND 4 SA58780D IN– IN+ 8 GSEL 7 VCC 6 OUT 5 COM SL01572 Figure 2. Pin configuration. PIN DESCRIPTION AND EQUIVALENT CIRCUITS PIN SYMBOL DESCRIPTION 1 ISEL Input common mode range selection HIGH: 1.8 V to 24 V LOW: –0.3 V to VCC – 2.4 V 4 GND Ground 2 IN– Inverting input 3 IN+ Non-inverting input 5 COM 2003 Nov 10 INTERNAL EQUIVALENT CIRCUIT Reference voltage input 3 VCC 7 ISEL 1 GND 4 IN– 2 IN+ 3 VCC 7 COM 5 Philips Semiconductors Product data Sense current amplifier with selectable gain PIN SYMBOL DESCRIPTION 6 OUT Output 7 VCC Positive supply 8 GSEL SA58780 INTERNAL EQUIVALENT CIRCUIT VCC 7 6 Gain selection HIGH: 100 V/V LOW: 50 V/V GND 4 VCC 7 GSEL 8 GND 4 OUT MAXIMUM RATINGS SYMBOL PARAMETER MIN. MAX. UNIT +25 V VCC Single supply voltage –0.3 VIN Input voltage –0.3 +25 V Tstg Storage temperature –40 +125 °C Tamb Operating ambient temperature –40 +85 °C PD Power dissipation – 300 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 kΩ; Tamb = 25 °C, unless otherwise specified. MIN. TYP. MAX. UNIT 3.0 – 24 V – 150 200 µA 97 100 103 mV/mV 48.5 50 51.5 mV/mV –0.5 – 0.5 mV –0.5 – 0.5 mV VISEL = 5 V –4 – 4 µV/°C Input offset voltage 1 temperature coefficient VISEL = 0 V –6 – 6 µV/°C VI(CM)1 Common mode input voltage range 1 VISEL = 5 V (HIGH) 1.8 – 24 V VI(CM)2 Common mode input voltage range 1 VISEL = 0 V (LOW) –0.3 – VCC – 2.4 V VI(dif) Differential input voltage –200 – 200 mV Ii(bias)1 Input bias current 1 ∆VIN = 0 V; VISEL = 5 V (HIGH) 0.8 1.2 1.6 µA Ii(bias)2 Input bias current 2 ∆VIN = 0 V; VISEL = 0 V (LOW) –0.8 –1.2 –1.6 µA ∆VIO/∆T Input offset voltage temperature drift Tamb = –40 to +85 °C – ±1 ±3 µV/°C Zi Input impedance 100 – – kΩ VCOM COM voltage range RL = open 1.2 – VCC – 1.2 V IISEL ISEL current VISEL = 5 V – 1.0 – µA VISEL1 ISEL voltage range 1 (HIGH) 1.7 – 24 V VISEL2 ISEL voltage range 2 (LOW) 0 – 0.5 V IGSEL GSEL sink current VGSEL = 5 V – 1.0 – µA VGSEL1 GSEL voltage range 1 (100 V/V) 1.7 – 24 V VGSEL2 GSEL voltage range 2 (50 V/V) 0 – 0.5 V VOUT Output voltage range RL = open 0.3 – VCC – 0.3 V IO(source) Output source current VOUT = VCC – 0.3 V 0.5 1.0 – mA IO(sink) Output sink current VOUT = 0.3 V –0.5 –1.0 – mA fC1 Cutoff frequency 1 VGSEL = 5 V (Gv(high) = 100 V/V); VOUT = –3 dB – 100 – kHz fC2 Cutoff frequency 2 VGSEL = 0 V (Gv(low) = 50 V/V); VOUT = –3 dB – 140 – kHz PSRR1 Power supply rejection ratio 1 f = 1 kHz; VISEL = 5 V 70 80 – dB PSRR2 Power supply rejection ratio 2 f = 1 kHz; VISEL = 0 V 70 80 – dB CMRR1 Common mode rejection ratio 1 f = 1 kHz; VISEL = 5 V 70 80 – dB CMRR2 Common mode rejection ratio 2 f = 1 kHz; VISEL = 0 V 70 80 – dB SYMBOL PARAMETER CONDITIONS VCC Supply voltage operating range ICC Supply current Gv(high) Voltage gain HIGH GSEL = 5 V Gv(low) Voltage gain LOW GSEL = 0 V VIO1 Input offset voltage 1 ∆VIN = 0 V; VISEL = 5 V (HIGH) VIO2 Input offset voltage 2 ∆VIN = 0 V; VISEL = 0 V (LOW) ∆VIO1 Input offset voltage 1 temperature coefficient ∆VIO2 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 kΩ; Tamb = 25 °C; unless otherwise specified. 100.8 VOLTAGE GAIN HIGH, GV(high) , (mV/mV) SUPPLY CURRENT, ICC (mA) 180 160 140 120 100 –40 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) 99.6 –20 0 20 40 60 80 100 SL01964 Figure 4. Voltage Gain 1 (HIGH) versus ambient temperature. VOLTAGE GAIN LOW, GV(low), (mV/mV) VOLTAGE GAIN HIGH, GV(high) , (mV/mV) 99.8 50.6 100.4 100.0 99.6 99.2 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) VGSEL = 0 V VISEL = 5 V 50.4 50.2 50.0 49.8 49.6 49.4 –40 100 –20 0 20 40 60 SL01965 0.10 INPUT OFFSET VOLTAGE 1, VIO1 (mV) VGSEL = 0 V VISEL = 0 V 50.5 50.0 49.5 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) 80 100 SL01966 Figure 6. Voltage Gain 2 (LOW) versus ambient temperature. 51.0 –20 80 AMBIENT TEMPERATURE, Tamb (°C) Figure 5. Voltage Gain 1 (HIGH) versus ambient temperature. VOLTAGE GAIN LOW, GV(low) , (mV/mV) 100.0 SL01963 VGSEL = 5 V VISEL = 0 V ∆VIN = 0 V VISEL = 5 V 0.05 0 –0.05 –0.10 –0.15 –0.20 –40 100 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) SL01979 Figure 7. Voltage Gain 2 (LOW) versus ambient temperature. 2003 Nov 10 100.2 AMBIENT TEMPERATURE, Tamb (°C) 100.8 49.0 –40 VGSEL = 5 V VISEL = 5 V 100.4 99.4 –40 100 Figure 3. Supply current versus ambient temperature. 98.8 –40 100.6 80 100 SL01967 Figure 8. Input offset voltage 1 versus ambient temperature. 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 kΩ; Tamb = 25 °C; unless otherwise specified. 1.6 ∆VIN = 0 V VISEL = 0 V INPUT BIAS CURRENT 1, II(bias)1 ( µ A) INPUT OFFSET VOLTAGE 2, VIO2 (mV) 0.100 0.075 0.050 0.025 0 –0.025 –0.050 –40 0 –20 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) 1.0 0.8 40 60 80 100 SL01981 2.0 INPUT COMMON MODE VOLTAGE RANGE 1, V ICM1 (V) –1.0 –1.2 0 –20 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) 100 VISEL = 5 V 1.8 1.6 1.4 1.2 1.0 0.8 –40 0 –20 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) SL01982 Figure 11. Input bias current versus ambient temperature. 100 SL01983 Figure 12. Input common mode voltage (minimum) versus ambient temperature. 4 6 RL = OPEN COM VOLTAGE RANGE, VCOM (V) VISEL = 0 V 3 MAXIMUM 2 1 0 MINIMUM –1 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) 80 5 MAXIMUM 4 3 2 MINIMUM 1 0 –40 100 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) SL01984 Figure 13. Input common mode voltage range 2 versus ambient temperature. 2003 Nov 10 20 Figure 10. Input bias current versus ambient temperature. –0.8 –2 –40 0 –20 SL01980 ∆VIN = 0 V VISEL = 0 V INPUT BIAS CURRENT 2, II(bias)2 ( µ A) 1.2 AMBIENT TEMPERATURE, Tamb (°C) –0.6 INPUT COMMON MODE VOLTAGE RANGE 2, V ICM2 (V) 1.4 0.6 –40 100 Figure 9. Input offset voltage 1 versus ambient temperature. –1.4 –40 ∆VIN = 0 V VISEL = 5 V 80 100 SL01985 Figure 14. COM voltage range versus ambient temperature. 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 kΩ; Tamb = 25 °C; unless otherwise specified. 5.0 OUTPUT VOLTAGE RANGE, V OUT (V) RL = OPEN OUTPUT SOURCE CURRENT, IO(source) (mA) 6 MAXIMUM 5 4 3 2 1 0 –40 MINIMUM 0 –20 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) VOUT = VCC – 0.3 V 4.5 4.0 3.5 3.0 2.5 2.0 –40 100 SL01986 I SEL SINK CURRENT, IISEL (mA) OUTPUT SINK CURRENT, I O(sink) (mA) 60 80 100 SL01987 VISEL = 5 V 2.0 1.5 1.0 0.5 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) 1.2 1.0 0.8 0.6 –40 100 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) SL01988 Figure 17. Output sink current versus ambient temperature. 100 SL01989 Figure 18. ISEL sink current versus ambient temperature. 1.90 I SEL VOLTAGE RANGE 1, (HIGH), V ISEL1 (V) 1.4 VGSEL = 5 V GSEL SINK CURRENT, IGSEL (mA) 40 1.4 VOUT = 0.3 V 1.2 1.0 0.8 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) 80 VISEL = 5 V 1.85 1.80 1.75 1.70 1.65 1.60 1.55 –40 100 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) SL01990 Figure 19. GSEL sink current versus ambient temperature. 2003 Nov 10 20 Figure 16. Output source current versus ambient temperature. 2.5 0.6 –40 0 AMBIENT TEMPERATURE, Tamb (°C) Figure 15. Output voltage range versus ambient temperature. 0 –40 –20 80 100 SL01995 Figure 20. ISEL voltage range 1 versus ambient temperature. 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 kΩ; Tamb = 25 °C; unless otherwise specified. 1.3 1.4 VGSEL = 5 V G SEL VOLTAGE RANGE 1, VGSEL1 (V) I SEL VOLTAGE RANGE 2, V ISEL2 (V) VISEL = 0 V 1.1 0.9 0.7 0.5 0.3 –40 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) COMMON MODE REJECTION RATIO 1, CMRR1 (dB) G SEL VOLTAGE RANGE 2, V GSEL2 (V) 1.7 1.3 0.9 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) 100 POWER SUPPLY REJECTION RATIO 1, PSRR1 (dB) COMMON MODE REJECTION RATIO 2, CMRR2 (dB) 90 88 86 84 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) 80 100 80 100 SL01997 VISEL = 5 V 83 81 79 77 75 –40 –20 0 20 40 60 80 100 SL01999 106 VISEL = 5 V 102 98 94 90 –40 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) SL02000 Figure 25. Common mode rejection ratio 2 versus ambient temperature. 2003 Nov 10 60 Figure 24. Common mode rejection ratio 1 versus ambient temperature. VISEL = 0 V 0 40 85 SL01998 92 –20 20 AMBIENT TEMPERATURE, Tamb (°C) Figure 23. GSEL voltage range 2 versus ambient temperature. 82 –40 0 Figure 22. GSEL voltage range 1 versus ambient temperature. 2.1 20 –20 SL01996 VGSEL = 0 V 0 0.8 AMBIENT TEMPERATURE, Tamb (°C) 2.5 –20 1.0 0.6 –40 100 Figure 21. ISEL voltage range 2 versus ambient temperature. 0.5 –40 1.2 80 100 SL02020 Figure 26. Power supply rejection ratio 1 versus ambient temperature. 9 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 TYPICAL CHARACTERIZATION CURVES (continued) 95 130 94 93 92 91 90 –40 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) CUTOFF FREQUENCY 2, fC2 (kHz) CUTOFF FREQUENCY 1, f C1 (kHz) 80 –20 0 20 40 60 80 100 SL02022 146 VGSEL = 5 V VISEL = 0 V 100 95 90 85 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) VGSEL = 0 V VISEL = 5 V 144 142 140 138 136 –40 100 –20 0 20 40 60 80 AMBIENT TEMPERATURE, Tamb (°C) SL02023 Figure 29. Cutoff frequency 1 versus ambient temperature. 100 SL02024 Figure 30. Cutoff frequency 2 versus ambient temperature. 0.9 MINIMUM OUTPUT VOLTAGE, VOUT(min) (V) 150 VGSEL = 0 V VISEL = 0 V 146 142 138 134 0.8 RL = OPEN 0.7 RL = 20 kΩ 0.6 RL = 10 kΩ 0.5 RL = 5.1 kΩ 0.4 0.3 0.2 0.1 0 –20 0 20 40 60 AMBIENT TEMPERATURE, Tamb (°C) 80 100 1.0 1.5 2.0 COM VOLTAGE, VCOM (V) SL02025 Figure 31. Cutoff frequency 2 versus ambient temperature. 2003 Nov 10 90 Figure 28. Cutoff frequency 1 versus ambient temperature. 105 130 –40 100 SL02021 110 80 –40 110 AMBIENT TEMPERATURE, Tamb (°C) 120 115 120 70 –40 100 Figure 27. Power supply rejection ratio 2 versus ambient temperature. CUTOFF FREQUENCY 2, fC2 (kHz) VGSEL = 5 V VISEL = 5 V VISEL = 0 V CUTOFF FREQUENCY 1, f C1 (kHz) POWER SUPPLY REJECTION RATIO 2, PSRR2 (dB) VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 kΩ; Tamb = 25 °C; unless otherwise specified. 2.5 SL02026 Figure 32. Minimum output voltage versus COM voltage. 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 kΩ; Tamb = 25 °C; unless otherwise specified. INPUT BIAS CURRENT, II(bias) ( µ A) 7 6 5 4 3 2 1 0 –250 –50 –150 50 150 INPUT DIFFERENTIAL VOLTAGE, VIDF (mV) 250 SL02027 Figure 33. Input bias current versus input differential voltage. APPLICATION INFORMATION Battery current sensing circuit Charger current sensing 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. The only difference between the battery and charge current sense circuits is the diode position. 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. 20 MΩ 20 MΩ TO CHARGER CIRCUIT RS TO CHARGER CIRCUIT 1 8 2 7 3 6 4 5 RS TO ADC 1 8 BATTERY 2 7 2.5 V TO ADC 3 6 4 5 SL01574 BATTERY Figure 35. Charger current sensing circuit. 2.5 V 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 SO8: plastic small outline package; 8 leads; body width 3.9 mm 2003 Nov 10 13 SA58780 SOP005 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 REVISION HISTORY Rev Date Description _3 20031110 Product data (9397 750 12303); ECN 853–2290 30333 of 09 September 2003. Supersedes data of 2002 Dec 10 (9397 750 10746). Modifications: • Change package outline version to SOP005 in Ordering information table and Package outline sections. _2 20021210 Product data (9397 750 10746); ECN 853–2290 29179 of 11 November 2002. Supersedes data of 2001 Oct 03 (9397 750 08982). _1 20011003 Product data; initial version (9397 750 08982). ECN 853–2290 27197 of 03 October 2001. 2003 Nov 10 14 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 Data sheet status Level Data sheet status [1] Product status [2] [3] Definitions I Objective data Development 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. II Preliminary data Qualification 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. III Product data Production 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). [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. Koninklijke Philips Electronics N.V. 2003 All rights reserved. Printed in U.S.A. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 Date of release: 11-03 For sales offices addresses send e-mail to: [email protected]. Document order number: 2003 Nov 10 15 9397 750 12303