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PDF SA58780 Data sheet ( Hoja de datos )
| Número de pieza | SA58780 | |
| Descripción | Sense current amplifier with selectable gain | |
| Fabricantes | Philips | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SA58780 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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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
1 page  
Philips Semiconductors
Sense current amplifier with selectable gain
Product data
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.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
VCC
ICC
Gv(high)
Gv(low)
VIO1
VIO2
∆VIO1
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
GSEL = 5 V
GSEL = 0 V
∆VIN = 0 V; VISEL = 5 V (HIGH)
∆VIN = 0 V; VISEL = 0 V (LOW)
VISEL = 5 V
3.0 –
– 150
97 100
48.5 50
–0.5 –
–0.5 –
–4 –
24
200
103
51.5
0.5
0.5
4
∆VIO2
Input offset voltage 1 temperature
coefficient
VISEL = 0 V
–6 –
6
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
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
VISEL = 5 V (HIGH)
VISEL = 0 V (LOW)
∆VIN = 0 V; VISEL = 5 V (HIGH)
∆VIN = 0 V; VISEL = 0 V (LOW)
Tamb = –40 to +85 °C
RL = open
VISEL = 5 V
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
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
–
–
–
1.2
–1.2
±1
–
–
1.0
–
–
1.0
–
–
–
1.0
–1.0
100
140
80
80
80
80
24
VCC – 2.4
200
1.6
–1.6
±3
–
VCC – 1.2
–
24
0.5
–
24
0.5
VCC – 0.3
–
–
–
–
–
–
–
–
UNIT
V
µA
mV/mV
mV/mV
mV
mV
µV/°C
µV/°C
V
V
mV
µA
µA
µV/°C
kΩ
V
µA
V
V
µA
V
V
V
mA
mA
kHz
kHz
dB
dB
dB
dB
2003 Nov 10
5
5 Page 
Philips Semiconductors
Sense current amplifier with selectable gain
TYPICAL CHARACTERIZATION CURVES (continued)
VCC = 5.0 V; VGSEL = VISEL = 5 V; RL = 10 kΩ; Tamb = 25 °C; unless otherwise specified.
7
6
5
4
3
2
1
0
–250
–150
–50
50
150
INPUT DIFFERENTIAL VOLTAGE, VIDF (mV)
250
SL02027
Figure 33. Input bias current versus input differential voltage.
Product data
SA58780
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.
20 MΩ
RS
1
TO CHARGER CIRCUIT
8
2
BATTERY
3
4
7
TO ADC
6
5
2.5 V
Charger current sensing
The only difference between the battery and charge current sense
circuits is the diode position.
20 MΩ
RS
1
TO CHARGER CIRCUIT
8
2
BATTERY
3
4
7
TO ADC
6
5
2.5 V
SL01574
Figure 35. Charger current sensing circuit.
SL01573
Figure 34. Battery current sensing circuit.
2003 Nov 10
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet SA58780.PDF ] | |
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