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| INTEGRATED CIRCUITS SA58780 Sense current amplifier with selectable gain Product data File under Integrated Circuits, Standard Analog 2001 Oct 03 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. 2001 Oct 03 2 853-2290 27197 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 TEMPERATURE RANGE -20 to +85 C Part number marking Each device is marked with three or four lines of alphanumeric codes. The first three letters of the top line designate the product. The fourth letter, represented by `x', is a date tracking code. The remaining lines are for manufacturing codes. Part number SA58780D Marking AGSx 1 2 3 4 7 6 8 5 AG S x SL01571 PIN CONFIGURATION TOP VIEW ISEL IN- IN+ GND 1 2 8 7 GSEL VCC OUT COM SO8 3 4 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 2001 Oct 03 3 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 PIN 5 SYMBOL COM DESCRIPTION Reference voltage input VCC INTERNAL EQUIVALENT CIRCUIT 7 COM 5 6 OUT Output 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 -20 - MAX. +25 +25 +125 +85 300 UNIT V V C C mW 2001 Oct 03 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 = -20 to +75 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 2001 Oct 03 5 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 APPLICATION INFORMATION Battery current sensing circuit The circuit shown in Figure 3 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 4. Charger current sensing circuit. SL01573 Figure 3. Battery current sensing circuit. PACKING METHOD The SA58780 is packed in reels, as shown in Figure 5. GUARD BAND TAPE REEL ASSEMBLY TAPE DETAIL COVER TAPE CARRIER TAPE BARCODE LABEL BOX SL01305 Figure 5. Tape and reel packing method 2001 Oct 03 6 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 SO8: plastic small outline package; 8 leads; body width 3.9 mm pin 1 index B2 1.73 0.068 4.95 4.80 0.189 0.195 0.51 0.33 0.013 0.020 4.95 4.80 1.27 0.38 0.050 0.015 0.076 0.003 SO8 2001 Oct 03 7 Philips Semiconductors Product data Sense current amplifier with selectable gain SA58780 Data sheet status Data sheet status [1] Objective data Preliminary data Product status [2] Development Qualification 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. Changes will be communicated according to the Customer Product/Process Change Notification (CPCN) procedure SNW-SQ-650A. 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. 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, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. 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. 2001 All rights reserved. Printed in U.S.A. Date of release: 10-01 For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. Document order number: 9397 750 08982 Philips Semiconductors 2001 Oct 03 8 |
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