SA58780
SA58780 is Sense current amplifier with selectable gain manufactured by Philips Semiconductors.
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 mon mode range is selectable for high and low ranges. The amplif Ier 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 puters and PDAs.
FEATURES
- 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 k Hz): 80 d B (typical)
- mon mode rejection ratio (1 k Hz): 100 d B (typical)
- mon 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 puters
- 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 kΩ L R 194 kΩ R 6 kΩ R 15 kΩ R 5 kΩ H R 55 kΩ L OUT TO BATTERY
GAIN CONTROL 8 GSEL
6 R 10 kΩ R 6 kΩ
TO ADC
H R 5 kΩ
L R 55 kΩ
SL01575
Figure 1. Simplified device diagram.
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
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...
