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PDF ADM8660 Data sheet ( Hoja de datos )
| Número de pieza | ADM8660 | |
| Descripción | CMOS Switched-Capacitor Voltage Converters | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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CMOS Switched-Capacitor
Voltage Converters
ADM660/ADM8660
FEATURES
ADM660: Inverts or Doubles Input Supply Voltage
ADM8660: Inverts Input Supply Voltage
100 mA Output Current
Shutdown Function (ADM8660)
2.2 F or 10 F Capacitors
0.3 V Drop at 30 mA Load
+1.5 V to +7 V Supply
Low Power CMOS: 600 A Quiescent Current
Selectable Charge Pump Frequency (25 kHz/120 kHz)
Pin Compatible Upgrade for MAX660, MAX665, ICL7660
Available in 16-Lead TSSOP Package
APPLICATIONS
Handheld Instruments
Portable Computers
Remote Data Acquisition
Op Amp Power Supplies
GENERAL DESCRIPTION
The ADM660/ADM8660 is a charge-pump voltage converter
that can be used to either invert the input supply voltage giving
VOUT = –VIN or double it (ADM660 only) giving VOUT = 2 ϫ VIN.
Input voltages ranging from +1.5 V to +7 V can be inverted into
a negative –1.5 V to –7 V output supply. This inverting scheme
is ideal for generating a negative rail in single power supply
systems. Only two small external capacitors are needed for the
charge pump. Output currents up to 50 mA with greater than
90% efficiency are achievable, while 100 mA achieves greater
than 80% efficiency.
A Frequency Control (FC) input pin is used to select either
25 kHz or 120 kHz charge-pump operation. This is used to
optimize capacitor size and quiescent current. With 25 kHz
selected, a 10 µF external capacitor is suitable, while with 120 kHz
the capacitor may be reduced to 2.2 µF. The oscillator frequency
on the ADM660 can also be controlled with an external capacitor
connected to the OSC input or by driving this input with an
external clock. In applications where a higher supply voltage is
desired it is possible to use the ADM660 to double the input
voltage. With input voltages from 2.5 V to 7 V, output voltages
from 5 V to 14 V are achievable with up to 100 mA output current.
The ADM8660 features a low power shutdown (SD) pin instead
of the external oscillator (OSC) pin. This can be used to disable
the device and reduce the quiescent current to 300 nA.
TYPICAL CIRCUIT CONFIGURATIONS
+1.5V TO +7V
INPUT
C1 +
10F
FC V+
ADM660
CAP+
OSC
GND
LV
CAP–
OUT
C2
+10F
INVERTED
NEGATIVE
OUTPUT
Voltage Inverter Configuration (ADM660)
C1 +
10F
SHUTDOWN
CONTROL
+1.5V TO +7V
INPUT
FC ADM8660
CAP+
GND
V+
LV
CAP–
OUT
SD
C2
+10F
INVERTED
NEGATIVE
OUTPUT
Voltage Inverter Configuration with Shutdown (ADM8660)
The ADM660 is a pin compatible upgrade for the MAX660,
MAX665, ICL7660, and LTC1046.
The ADM660/ADM8660 is available in 8-lead DIP and
narrow-body SOIC. The ADM660 is also available in a 16-lead
TSSOP package.
ADM660/ADM8660 Options
Option
ADM660
ADM8660
Inverting Mode
Doubling Mode
External Oscillator
Shutdown
Package Options
R-8
N-8
RU-16
Y
Y
Y
N
Y
Y
Y
Y
N
N
Y
Y
Y
N
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax:781/461-3113 ©2011 Analog Devices, Inc. All rights reserved.
1 page  
Typical Performance Characteristics–ADM660/ADM8660
3.0
2.5
VOLTAGE DOUBLER
LV = OUT
2.0
1.5
1.0
LV = GND
0.5
LV = OPEN
0
1.5
3.5 7
5.5
.5
SUPPLY VOLTAGE – Volts
TPC 1. Power Supply Current vs. Voltage
100
IL = 10mA
90
80 IL = 1mA
70
60
IL = 50mA
50
IL = 80mA
40
30
1k
10k 100k
CHARGE-PUMP FREQUENCY – Hz
1M
TPC 4. Efficiency vs. Charge-Pump Frequency
–3.0
–3.4
EFFICIENCY
100
80
–3.8
60
–4.2
–4.6
VOUT
40
20
–5.0
0
20 40
60 80
LOAD CURRENT – mA
0
100
TPC 2. Output Voltage and Efficiency vs. Load Current
1.6
1.2
0.8
V+ = +1.5V
0.4
V+ = +3.5V
V+ = +2.5V
V+ = +4.5V
V+ = +5.5V
0
0 20 40 60 80 100
LOAD CURRENT – mA
TPC 3. Output Voltage Drop vs. Load Current
3.5
3.0
2.5
2.0
LV = GND
VOLTAGE DOUBLER
1.5
1.0
0.5
0
1
LV = GND
VOLTAGE INVERTER
10 100
CHARGE-PUMP FREQUENCY – kHz
1000
TPC 5. Power Supply Current vs. Charge-Pump
Frequency
120
V+ = +6.5V
100
V+ = +5.5V V+ = +4.5V
80
V+ = +3.5V
60
V+ = +1.5V
V+ = +2.5V
40
20
0
0 20 40 60 80 100
LOAD CURRENT – mA
TPC 6. Power Efficiency vs. Load Current
REV. C
–5–
5 Page 
5.10
5.00
4.90
16 9
4.50
4.40
4.30
1
6.40
BSC
8
PIN 1
0.15
0.05
1.20
MAX
0.20
0.09
0.65
BSC
0.30
0.19
COPLANARITY
0.10
SEATING
PLANE
8°
0°
0.75
0.60
0.45
COMPLIANT TO JEDEC STANDARDS MO-153-AB
Figure 12. 16-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-16)
Dimensions shown in millimeters
ADM660/ADM8660
ORDERING GUIDE
Model1
ADM660ANZ
ADM660ARZ
ADM660ARZ-REEL
ADM660ARUZ
ADM660ARUZ-REEL
ADM660ARUZ-REEL7
ADM8660ANZ
ADM8660ARZ
ADM8660ARZ-REEL
1 Z = RoHS Compliant Part
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Package Description
8-Lead Plastic Dual In-Line Package [PDIP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
16-Lead Thin Shrink Small Outline Package [TSSOP]
16-Lead Thin Shrink Small Outline Package [TSSOP]
16-Lead Thin Shrink Small Outline Package [TSSOP]
8-Lead Plastic Dual In-Line Package [PDIP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N]
Package Option
N-8
R-8
R-8
RU-16
RU-16
RU-16
N-8
R-8
R-8
REVISION HISTORY
4/11—Rev. B to Rev. C
Changes to Ordering Guide .......................................................... 11
12/02—Rev. A to Rev. B
Renumbered TPCs and Figures........................................Universal
Edits to Specifications ...................................................................... 2
Updated Absolute Maximum Ratings ........................................... 3
Updated Outline Dimensions ....................................................... 10
©2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D00082-0-4/11(C)
REV. C
–11–
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ADM8660.PDF ] | |
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