SA58780 [NXP]
Sense current amplifier with selectable gain; 感应电流放大器，可选增益
| 型号： | SA58780 |
| 厂家： | 
NXP |
| 描述： | Sense current amplifier with selectable gain |
| 文件： | 总15页 (文件大小：138K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
SA58780
Sense current amplifier with selectable gain
Product data
2003 Nov 10
Supersedes data of 2002 Dec 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 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
• Notebook computers
• Low supply current: 150 µA (typical)
• Personal digital assistants (PDA)
• 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:
1.8 V to 24 V (I
HIGH);
SEL
–0.3 V to V – 2.4 V (I
LOW)
CC
SEL
• Amplifier gain selection:
G
G
HIGH: G = 100 V/V;
V
SEL
LOW: G = 50 V/V
SEL
V
SIMPLIFIED DEVICE DIAGRAM
R
TO CHARGE
TO BATTERY
S
I
SEL
1
2
GAIN CONTROL
INPUT CONTROL
SA58780
8
7
G
HIGH
SEL
R
IN–
194 kΩ
H
L
R
6 kΩ
R
5 kΩ
R
55 kΩ
V
CC
V/I CONVERTER
LOW
L
H
R
IN+
15 kΩ
3
4
OUT
6
5
TO ADC
R
200 kΩ
R
10 kΩ
GND
L
COM
H
R
6 kΩ
R
5 kΩ
R
55 kΩ
V
COM
SL01575
Figure 1. Simplified device diagram.
2
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
ORDERING INFORMATION
PACKAGE
TEMPERATURE
RANGE
TYPE NUMBER
NAME
DESCRIPTION
VERSION
SA58780D
SO8
plastic small outline package; 8 leads; body width 3.9 mm
SOP005
–40 °C to +85 °C
PIN CONFIGURATION
TOP VIEW
I
1
2
3
4
8
7
6
5
G
SEL
SEL
IN–
V
CC
IN+
OUT
GND
COM
SL01572
Figure 2. Pin configuration.
PIN DESCRIPTION AND EQUIVALENT CIRCUITS
PIN
SYMBOL
DESCRIPTION
INTERNAL EQUIVALENT CIRCUIT
1
I
Input common mode range selection
HIGH: 1.8 V to 24 V
SEL
7
V
CC
LOW: –0.3 V to V – 2.4 V
CC
1
I
SEL
4
GND
Ground
4
GND
2
3
IN–
IN+
Inverting input
IN–
2
Non-inverting input
3
7
IN+
5
COM
Reference voltage input
V
CC
5
COM
3
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
PIN
SYMBOL
OUT
DESCRIPTION
INTERNAL EQUIVALENT CIRCUIT
6
Output
7
V
CC
6
OUT
7
V
CC
Positive supply
4
7
GND
8
G
Gain selection
SEL
V
CC
HIGH: 100 V/V
LOW: 50 V/V
8
4
G
SEL
GND
MAXIMUM RATINGS
SYMBOL
PARAMETER
MIN.
–0.3
–0.3
–40
–40
–
MAX.
+25
UNIT
V
V
V
Single supply voltage
CC
IN
Input voltage
+25
V
T
stg
Storage temperature
+125
+85
°C
T
Operating ambient temperature
Power dissipation
°C
amb
P
D
300
mW
4
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
ELECTRICAL CHARACTERISTICS
V
= 5.0 V; V
= 15 V; V
= 25 V; V
= 5 V; V
= 5 V; R = 10 kΩ; T
= 25 °C, unless otherwise specified.
CC
ICM
COM
ISEL
GSEL
L
amb
SYMBOL
PARAMETER
CONDITIONS
MIN.
3.0
–
TYP.
–
MAX.
UNIT
V
V
CC
Supply voltage operating range
Supply current
24
200
103
51.5
0.5
0.5
4
I
150
100
50
–
µA
CC
G
G
Voltage gain HIGH
G
= 5 V
= 0 V
97
mV/mV
mV/mV
mV
v(high)
v(low)
IO1
SEL
SEL
Voltage gain LOW
G
48.5
–0.5
–0.5
–4
V
V
Input offset voltage 1
Input offset voltage 2
∆V = 0 V; V
= 5 V (HIGH)
= 0 V (LOW)
IN
ISEL
ISEL
∆V = 0 V; V
–
mV
IO2
IN
∆V
Input offset voltage 1 temperature
coefficient
V
ISEL
= 5 V
–
µV/°C
IO1
∆V
Input offset voltage 1 temperature
coefficient
V
ISEL
= 0 V
–6
–
6
µV/°C
IO2
V
V
V
Common mode input voltage range 1
Common mode input voltage range 1
Differential input voltage
Input bias current 1
V
V
= 5 V (HIGH)
= 0 V (LOW)
1.8
–0.3
–200
0.8
–0.8
–
–
–
24
V
V
I(CM)1
I(CM)2
I(dif)
ISEL
V
– 2.4
ISEL
CC
–
200
1.6
–1.6
±3
mV
µA
µA
µV/°C
kΩ
V
I
I
∆V = 0 V; V
= 5 V (HIGH)
= 0 V (LOW)
1.2
–1.2
±1
–
i(bias)1
i(bias)2
IN
ISEL
ISEL
Input bias current 2
∆V = 0 V; V
IN
∆V /∆T
Input offset voltage temperature drift
Input impedance
T
amb
= –40 to +85 °C
IO
Z
i
100
1.2
–
–
V
COM voltage range
R = open
–
V
– 1.2
COM
ISEL
L
CC
I
I
I
I
current
V
ISEL
= 5 V
1.0
–
–
µA
V
SEL
SEL
SEL
V
V
voltage range 1 (HIGH)
voltage range 2 (LOW)
1.7
0
24
0.5
–
ISEL1
ISEL2
GSEL
–
V
I
G
G
G
sink current
V
GSEL
= 5 V
–
1.0
–
µA
V
SEL
SEL
SEL
V
GSEL1
V
GSEL2
V
OUT
voltage range 1
voltage range 2
(100 V/V)
(50 V/V)
1.7
0
24
0.5
–
V
Output voltage range
Output source current
Output sink current
Cutoff frequency 1
R = open
0.3
0.5
–0.5
–
–
V
– 0.3
V
L
CC
I
I
f
V
V
= V – 0.3 V
1.0
–1.0
100
–
–
–
mA
mA
kHz
O(source)
O(sink)
C1
OUT
OUT
GSEL
CC
= 0.3 V
V
V
= 5 V (G
= 100 V/V);
= 50 V/V);
v(high)
= –3 dB
OUT
f
C2
Cutoff frequency 2
V
V
= 0 V (G
–
140
–
kHz
GSEL
OUT
v(low)
= –3 dB
PSRR1
PSRR2
CMRR1
CMRR2
Power supply rejection ratio 1
Power supply rejection ratio 2
Common mode rejection ratio 1
Common mode rejection ratio 2
f = 1 kHz; V
f = 1 kHz; V
f = 1 kHz; V
f = 1 kHz; V
= 5 V
= 0 V
= 5 V
= 0 V
70
70
70
70
80
80
80
80
–
–
–
–
dB
dB
dB
dB
ISEL
ISEL
ISEL
ISEL
5
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T = 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
180
100.8
100.6
100.4
100.2
100.0
V
= 5 V
= 5 V
GSEL
V
ISEL
160
140
120
99.8
99.6
99.4
100
–40
–20
0
20
40
60
80
100
SL01963
–40
–20
0
20
40
60
80
100
SL01964
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 3. Supply current versus ambient temperature.
Figure 4. Voltage Gain 1 (HIGH) versus ambient temperature.
100.8
50.6
V
= 0 V
= 5 V
GSEL
V
= 5 V
= 0 V
GSEL
V
ISEL
V
ISEL
50.4
100.4
100.0
50.2
50.0
99.6
99.2
98.8
49.8
49.6
49.4
–40
–20
0
20
40
60
80
100
SL01965
–40
–20
0
20
40
60
80
100
SL01966
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 5. Voltage Gain 1 (HIGH) versus ambient temperature.
Figure 6. Voltage Gain 2 (LOW) versus ambient temperature.
0.10
51.0
∆V = 0 V
V
= 0 V
= 0 V
IN
GSEL
V
= 5 V
V
ISEL
ISEL
0.05
50.5
0
50.0
49.5
49.0
–0.05
–0.10
–0.15
–0.20
–40
–20
0
20
40
60
80
100
SL01979
–40
–20
0
20
40
60
80
100
SL01967
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 7. Voltage Gain 2 (LOW) versus ambient temperature.
Figure 8. Input offset voltage 1 versus ambient temperature.
6
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES (continued)
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T = 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
0.100
1.6
∆V = 0 V
IN
∆V = 0 V
IN
V
= 0 V
ISEL
V
= 5 V
ISEL
0.075
1.4
1.2
0.050
0.025
1.0
0.8
0.6
0
–0.025
–0.050
–40
–20
0
20
40
60
80
100
SL01980
–40
–20
0
20
40
60
80
100
SL01981
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 9. Input offset voltage 1 versus ambient temperature.
Figure 10. Input bias current versus ambient temperature.
–0.6
2.0
V
= 5 V
∆V = 0 V
IN
ISEL
V
= 0 V
ISEL
1.8
–0.8
1.6
1.4
–1.0
–1.2
–1.4
1.2
1.0
0.8
–40
–20
0
20
40
60
80
100
SL01982
–40
–20
0
20
40
60
80
100
SL01983
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 11. Input bias current versus ambient temperature.
Figure 12. Input common mode voltage (minimum) versus
ambient temperature.
4
6
V
= 0 V
R = OPEN
L
ISEL
3
5
MAXIMUM
MAXIMUM
2
1
4
3
0
2
MINIMUM
MINIMUM
–1
–2
1
0
–40
–20
0
20
40
60
80
100
SL01984
–40
–20
0
20
40
60
80
100
SL01985
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 13. Input common mode voltage range 2 versus
ambient temperature.
Figure 14. COM voltage range versus ambient temperature.
7
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES (continued)
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T = 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
6
5.0
4.5
R
= OPEN
V
= V – 0.3 V
OUT CC
L
MAXIMUM
5
4
3
4.0
3.5
2
3.0
1
0
2.5
2.0
MINIMUM
0
–40
–20
20
40
60
80
100
SL01986
–40
–20
0
20
40
60
80
100
SL01987
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 15. Output voltage range versus ambient temperature.
Figure 16. Output source current versus ambient temperature.
2.5
1.4
V
= 0.3 V
V
= 5 V
ISEL
OUT
2.0
1.5
1.2
1.0
0.8
0.6
1.0
0.5
0
–40
–20
0
20
40
60
80
100
SL01988
–40
–20
0
20
40
60
80
100
SL01989
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 17. Output sink current versus ambient temperature.
Figure 18. I
sink current versus ambient temperature.
SEL
1.4
1.90
V
= 5 V
V
= 5 V
ISEL
GSEL
1.85
1.80
1.75
1.70
1.2
1.0
0.8
0.6
1.65
1.60
1.55
–40
–20
0
20
40
60
80
100
SL01990
–40
–20
0
20
40
60
80
100
SL01995
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 19. G
sink current versus ambient temperature.
Figure 20. I
voltage range 1 versus ambient temperature.
SEL
SEL
8
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES (continued)
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T = 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
1.3
1.4
V
= 0 V
V
= 5 V
GSEL
ISEL
1.1
0.9
1.2
1.0
0.8
0.6
0.7
0.5
0.3
–40
–20
0
20
40
60
80
100
SL01996
–40
–20
0
20
40
60
80
100
SL01997
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 21. I
voltage range 2 versus ambient temperature.
Figure 22. G
voltage range 1 versus ambient temperature.
SEL
SEL
2.5
85
V
V
= 0 V
= 5 V
ISEL
GSEL
2.1
1.7
83
81
1.3
0.9
79
77
0.5
–40
75
–40
–20
0
20
40
60
80
100
SL01998
–20
0
20
40
60
80
100
SL01999
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 23. G
voltage range 2 versus ambient temperature.
Figure 24. Common mode rejection ratio 1 versus
ambient temperature.
SEL
92
V
106
= 0 V
V
= 5 V
ISEL
ISEL
90
88
102
98
94
90
86
84
82
–40
–20
0
20
40
60
80
100
SL02000
–40
–20
0
20
40
60
80
100
SL02020
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 25. Common mode rejection ratio 2 versus
ambient temperature.
Figure 26. Power supply rejection ratio 1 versus
ambient temperature.
9
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES (continued)
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T = 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
95
130
120
V
V
= 5 V
V
= 0 V
GSEL
ISEL
= 5 V
ISEL
94
93
110
100
92
91
90
80
70
90
–40
–20
0
20
40
60
80
100
SL02021
–40
–20
0
20
40
60
80
100
SL02022
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 27. Power supply rejection ratio 2 versus
ambient temperature.
Figure 28. Cutoff frequency 1 versus ambient temperature.
120
115
146
V
V
= 5 V
V
= 0 V
= 5 V
GSEL
GSEL
= 0 V
V
ISEL
ISEL
144
142
110
105
100
95
140
138
136
90
85
80
–40
–20
0
20
40
60
80
100
SL02023
–40
–20
0
20
40
60
80
100
SL02024
AMBIENT TEMPERATURE, T
(°C)
AMBIENT TEMPERATURE, T
(°C)
amb
amb
Figure 29. Cutoff frequency 1 versus ambient temperature.
Figure 30. Cutoff frequency 2 versus ambient temperature.
150
0.9
0.8
V
= 0 V
= 0 V
GSEL
V
ISEL
R
R
R
R
= OPEN
= 20 kΩ
= 10 kΩ
= 5.1 kΩ
L
L
L
L
146
142
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
138
134
130
–40
–20
0
20
40
60
80
100
SL02025
1.0
1.5
2.0
(V)
2.5
SL02026
AMBIENT TEMPERATURE, T
(°C)
COM VOLTAGE, V
amb
COM
Figure 31. Cutoff frequency 2 versus ambient temperature.
Figure 32. Minimum output voltage versus COM voltage.
10
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
TYPICAL CHARACTERIZATION CURVES (continued)
V
CC
= 5.0 V; V
= V
= 5 V; R = 10 kΩ; T
= 25 °C; unless otherwise specified.
GSEL
ISEL
L
amb
7
6
5
4
3
2
1
0
–250
–150
–50
50
150
(mV)
250
SL02027
INPUT DIFFERENTIAL VOLTAGE, V
IDF
Figure 33. Input bias current versus input differential voltage.
APPLICATION INFORMATION
Battery current sensing circuit
Charger current sensing
The only difference between the battery and charge current sense
circuits is the diode position.
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 G of
v
20 MΩ
TO CHARGER CIRCUIT
50 V/V. For a fixed G of 100 V/V, tie Pin 8 to V . For selectable
v
CC
R
S
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.
1
2
3
4
8
7
20 MΩ
TO CHARGER CIRCUIT
R
S
TO ADC
6
1
2
3
4
8
7
BATTERY
5
2.5 V
TO ADC
6
SL01574
BATTERY
5
Figure 35. Charger current sensing circuit.
2.5 V
SL01573
Figure 34. Battery current sensing circuit.
11
2003 Nov 10
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
TAPE DETAIL
REEL
ASSEMBLY
COVER TAPE
CARRIER TAPE
BARCODE
LABEL
BOX
SL01305
Figure 36. Tape and reel packing method
12
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SOP005
13
2003 Nov 10
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
_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.
14
2003 Nov 10
Philips Semiconductors
Product data
Sense current amplifier with selectable gain
SA58780
Data sheet status
Product
status
Definitions
[1]
Level
Data sheet status
[2] [3]
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
Product data
Qualification
Production
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
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.
Limitingvaluesdefinition— 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
viaaCustomerProduct/ProcessChangeNotification(CPCN).PhilipsSemiconductorsassumesnoresponsibilityorliabilityfortheuseofanyoftheseproducts,conveys
nolicenseortitleunderanypatent, copyright, ormaskworkrighttotheseproducts, andmakesnorepresentationsorwarrantiesthattheseproductsarefreefrompatent,
copyright, or mask work right infringement, unless otherwise specified.
Koninklijke Philips Electronics N.V. 2003
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 11-03
9397 750 12303
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
Philips
Semiconductors
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