AD ADM663 Tri-mode: 3.3 v, 5 v, adjustable micropower linear voltage regulator Datasheet

a
Tri-Mode: +3.3 V, +5 V, Adjustable
Micropower Linear Voltage Regulators
ADM663A/ADM666A*
FEATURES
Tri-Mode Operation
3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable
Low Power CMOS: 9 µA max Quiescent Current
High Current 100 mA Output
Low Dropout Voltage
Upgrade for ADM663/ADM666
“Small” 0.1 µF Output Capacitor (0805 Style)
+2 V to +16.5 V Operating Range
Low Battery Detector ADM666A
No Overshoot on Power-Up
Thermal Shutdown
FUNCTIONAL BLOCK DIAGRAMS
VOUT2
VIN
VOUT1
0.5V
1.3V
C1
A1
SENSE
D
E
C
O
D
E
R
SHDN
APPLICATIONS
Handheld Instruments
LCD Display Systems
Pagers
Battery Operated Equipment
C2
VIN–50mV
VSET
C3
50mV
R1
R2
0.9V
A2
VTC
R3
GENERAL DESCRIPTION
The ADM663A/ADM666A are precision linear voltage regulators featuring a maximum quiescent current of 9 µA. They can
be used to give a fixed +3.3 V or +5 V output with no additional
external components or can be adjusted from 1.3 V to 16 V
using two external resistors. Fixed or adjustable operation is automatically selected via the VSET input. The low quiescent current makes these devices especially suitable for battery powered
systems. The input voltage range is 2 V to 16.5 V, and an output current up to 100 mA is provided. Current limiting may be
set using a single external resistor. For additional safety, an
internal thermal shutdown circuit monitors the internal die
temperature.
VIN
VOUT
0.5V
1.3 V
C1
A1
SENSE
D
E
C
O
D
E
R
SHDN
The ADM666A features additional low battery monitoring circuitry to detect for low battery voltages.
The ADM663A/ADM666A are pin compatible enhancements
for the ADM663/ADM666. Improvements include an additional 3.3 V output range, higher output current, and operation
with a small output capacitor.
ADM663A
GND
C2
VIN–50mV
VSET
C3
50mV
LBI
R1
1.3V
C4
LBO
R2
R3
ADM666A
GND
The ADM663A/ADM666A are available in an 8-pin DIP and
narrow surface mount (SOIC) packages.
*Patent pending.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
ADM663A/ADM666A–SPECIFICATIONS (V
Parameter
Min
Input Voltage, VIN
Quiescent Current, IQ
Output Voltage, VOUT(2) (+5 V Mode)
Output Voltage, VOUT(2) (+3.3 V Mode)
Dropout Voltage, VDO
Dropout Voltage, VDO
Line Regulation (∆VOUT(2)/∆VIN)
Load Regulation
∆VOUT(2);(∆VOUT(2)/∆IOUT(2))
2.0
∆VOUT1;(∆VOUT1/∆IOUT1)
Reference Voltage, VSET
Reference Tempco (∆VSET/∆T)
VSET Internal Threshold
VF/A Low
VF/A High
VSET Input Current, ISET
Shutdown Input Voltage, VSHDN
4.75
3.135
Output Current, IOUT(2)
Minimum Load Current, IL (MIN)
LBI Input Threshold
Low Going
High Going
Hysteresis
LBI Input Current, ILBI
LBO Output Saturation Resistance, RSAT
LBO Output Leakage Current
VTC Open Circuit Voltage, VTC
VTC Sink Current, ITC
VTC Temperature Coefficient
Max
Units
6
5.0
3.3
0.75
1.0
0.03
16.5
9
5.25
3.465
0.9
1.2
0.35
V
µA
V
V
V
V
%/V
1.0
0.35
0.30
1.2
1.33
Ω
Ω
Ω
Ω
V
ppm/°C
± 100
50
VIN – 50
± 0.01 ± 10
1.4
0.3
± 10
± 0.01
0.5
3
Shutdown Input Current, ISHDN
SENSE Input Threshold, VOUT – VSENSE
SENSE Input Resistance, RSENSE
Input-Output Saturation Resistance, RSAT
ADM663A, VOUT1
200
20
20
400
40
30
100
1.0
1.1
= +9 V, TA = TMIN to TMAX, unless otherwise noted)
Typ
0.3
0.15
0.15
0.25
1.27
IN
1.26
1.29
30
± 0.01
20
0.2
0.9
8.0
+2.5
1.42
± 10
30
2.0
mV
mV
nA
V
V
nA
V
MΩ
Test Conditions/Comments
No Load, VIN = +16.5 V
VSET = GND
VSET = VIN
IOUT = 40 mA, VOUT = +14.5 V
IOUT = 100 mA, VOUT = +14.5 V
+2 V ≤ VIN ≤ +15 V, VOUT = VREF
VIN = (VOUT +3 V), 1 mA ≤ IOUT(2) ≤ 100 mA
VSET = GND (Fixed +5 V Output)
VSET = VIN (Fixed +3.3 V Output)
VSET = Resistive Divider (Adjustable Output)
ADM663A, 50 µA ≤ IOUT1 ≤ 10 mA
TA = +25°C, VOUT = VSET
VSET < VF/A Low for +5 V Output
VSET > VF/A High for +3.3 V Output
VSHDN High = Output Off
VSHDN Low = Output On
Current Limit Threshold
Ω
Ω
Ω
mA
µA
VIN = +2 V, IOUT = 1 mA
VIN = +9 V, IOUT = 10 mA
VIN = +15 V, IOUT = 10 mA
+3 V ≤ VIN ≤ +16.5 V, VIN – VOUT = +1.5 V
V
V
mV
nA
Ω
nA
V
mA
mV/°C
ADM666A
ADM666A
ADM666A
ADM666A
ADM666A, ISAT = 2 mA
ADM666A, LBI = 1.4 V
ADM663A
ADM663A
ADM663A
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(TA = +25°C unless otherwise noted)
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18 V
Terminal Voltage
(ADM663A) Pins 1, 3, 5, 6, 7
. . . . . . . . . . . . . . . . . . . . . . (GND – 0.3 V) to (VIN + 0.3 V)
(ADM666A) Pins 1, 2, 3, 5, 6
. . . . . . . . . . . . . . . . . . . . . . . (GND – 0.3 V) to (VIN + 0.3 V)
(ADM663A) Pin 2 . . . . . . . . (GND – 0.3 V) to (VOUT1 + 0.3 V)
(ADM666A) Pin 7 . . . . . . . . . . . . . . (GND – 0.3 V) to +16.5 V
Output Source Current
(ADM663A, ADM666A) Pin 2 . . . . . . . . . . . . . . . . . . 100 mA
(ADM663A) Pin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Output Sink Current, Pin 7 . . . . . . . . . . . . . . . . . . . . . . –20 mA
Power Dissipation, N-8 . . . . . . . . . . . . . . . . . . . . . . . . 800 mW
(Derate 8.3 mW/°C above +30°C)
θJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 120°C/W
–2–
Power Dissipation, R-8 . . . . . . . . . . . . . . . . . . . . . . . . 570 mW
(Derate 6 mW/°C above +30°C)
θJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 170°C/W
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>5000 V
*This is a stress rating only and functional operation of the device at these or any
other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended
periods of time may affect reliability.
REV. 0
ADM663A/ADM666A
PIN FUNCTION DESCRIPTION
TERMINOLOGY
Dropout Voltage: The input/output voltage differential at
which the regulator no longer maintains regulation against further reductions in input voltage. It is measured when the output
decreases 100 mV from its nominal value. The nominal value is
the measured value with VIN = VOUT +2 V.
Mnemonic
Function
VOUT(1) (2)
Voltage Regulator Output(s).
VIN
Voltage Regulator Input.
SENSE
Current Limit Sense Input. (Referenced to
VOUT(2).) If not used, it should be connected to
VOUT(2).
GND
Ground Pin. Must be connected to 0 V.
LBI
Low Battery Detect Input. Compared with 1.3 V.
LBO
Low Battery Detect Output. Open Drain Output.
SHDN
Digital Input. May be used to disable the device
so that the power consumption is minimized.
VSET
VTC
Line Regulation: The change in output voltage as a result of
a change in the input voltage. It is specified as a percentage
change in output voltage for an input voltage change.
∆V OUT
(100)
V
Line Reg = OUT
∆V IN
Load Regulation: The change in output voltage for a change
in output current.
Load Reg (Ω) =
Voltage Setting Input. Connect to GND for
+5 V output, to VIN for +3.3 V output or
connect to external resistive divider for
adjustable output.
Quiescent Current: The input bias current which flows when
the regulator output is unloaded or when the regulator is in
shutdown.
Sense Input Threshold: Current limit sense voltage. This
is the voltage (referenced to VOUT(2)) at which current limiting
occurs.
Temperature-Proportional Voltage for negative
TC Output.
Input-Output Saturation Resistance (ADM663A): This is a
measure of the internal MOS transistor effective resistance in series with VOUT1. The minimum input-output voltage differential
at low currents may be calculated by multiplying the load current by the saturation resistance.
PIN CONFIGURATIONS
DIP & SOIC
SENSE
1
VOUT2
2
ADM663A
VOUT1
3
TOP VIEW
(Not to Scale)
GND
4
8
VIN
7
VTC
6
VSET
5
SHDN
∆V OUT
∆IOUT
Thermal Limiting: This feature monitors the internal die temperature and disables the output when an internal temperature
of 125°C is reached.
Maximum Power Dissipation: The maximum total device
dissipation for which the regulator will continue to operate
within specifications.
DIP & SOIC
SENSE
1
VOUT
2
ADM666A
LBI
3
TOP VIEW
(Not to Scale)
GND
4
8
VIN
7
LBO
6
VSET
5
SHDN
ORDERING GUIDE
Model
Temperature
Range
Package
Option
ADM663AAN
ADM663AAR
ADM666AAN
ADM666AAR
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
N-8
R-8
N-8
R-8
REV. 0
–3–
ADM663A/ADM666A
Both the ADM663A and the ADM666A contain a shutdown
(SHDN) input that can be used to disable the error amplifier
and hence the voltage output. The power consumption in shutdown reduces to less than 9 µA.
GENERAL INFORMATION
The ADM663A/ADM666A contains a micropower bandgap
reference voltage source; an error amplifier, A1; three comparators, C1, C2, C3, and a series pass output transistor. A P-channel FET and an NPN transistor are used on the ADM663A
while the ADM666A uses an NPN output transistor.
VIN
VOUT
CIRCUIT DESCRIPTION
The internal bandgap reference is trimmed to 1.3 V ± 30 mV.
This is used as a reference input to the error amplifier A1. The
feedback signal from the regulator output is supplied to the
other input by an on-chip voltage divider or by two external resistors. When VSET is at ground, the internal divider tap between
R1 and R2, provides the error amplifier’s feedback signal giving
a +5 V output. When VSET is at VIN, the internal divider tap between R2 and R3 provides the error amplifier’s feedback signal
giving a +3.3 V output. When VSET is at more than 50 mV
above ground and less than 50 mV below VIN, the error amplifier’s input is switched directly to the VSET pin, and external
resistors are used to set the output voltage. The external resistors are selected so that the desired output voltage gives 1.3 V
at VSET.
D
E
C
O
D
E
R
50mV
LBI
1.3V
ADM666A
R3
Figure 2. ADM666A Functional Block Diagram
Circuit Configurations
For a fixed +5 V output the VSET input is grounded and no external resistors are necessary. This basic configuration is shown
in Figure 3. For a fixed +3.3 V output, the VSET input is connected to VIN as shown in Figure 4. Current limiting is not being utilized so the SENSE input is connected to VOUT(2).
VIN
+6V TO +16V
INPUT
SENSE
ADM663A
ADM666A
VOUT(2)
VSET
SHDN
GND
+5V
OUTPUT
Figure 3. A Fixed +5 V Output
VIN
VOUT2
+4.5V TO +16V
INPUT
0.5V
SENSE
ADM663A
ADM666A
VOUT(2)
VSET
SHDN
C1
A1
SENSE
D
E
C
O
D
E
R
C2
LBO
C4
GND
VOUT1
GND
+3.3V
OUTPUT
VIN–50mV
VSET
Figure 4. A Fixed +3.3 V Output
C3
50mV
R1
Output Voltage Setting
R2
If VSET is not connected to GND or to VIN, the output voltage is
set according to the following equation:
0.9V
A2
VTC
V OUT =V SET ×
R3
GND
VSET
C3
R2
The ADM666A has an additional comparator, C4, that compares the voltage on the low battery input, LBI, pin to the internal +1.3 V reference. The output from the comparator drives an
open drain FET connected to the low battery output pin, LBO.
The low battery threshold may be set using a suitable voltage
divider connected to LBI. When the voltage on LBI falls below
1.3 V, the open drain output LBO is pulled low.
1.3V
VIN–50mV
C2
R1
The ADM663A has an additional amplifier, A2, which provides
a temperature proportional output, VTC. If this is summed into
the inverting input of the error amplifier, a negative temperature
coefficient results at the output. This is useful when powering
liquid crystal displays over wide temperature ranges.
VIN
C1
SENSE
SHDN
Comparator C1 monitors the output current via the SENSE input. This input, referenced to VOUT(2), monitors the voltage
drop across a load sense resistor. If the voltage drop exceeds
0.5 V, then the error amplifier A1 is disabled and the output
current is limited.
SHDN
0.5V
1.3 V
A1
ADM663A
(R1 + R2)
R1
where VSET = 1.30 V.
Figure 1. ADM663A Functional Block Diagram
–4–
REV. 0
ADM663A/ADM666A
the current drain to a low quiescent (9 µA maximum) current.
This is very useful for low power applications. The SHDN input
should be driven with a CMOS logic level signal since the input
threshold is 0.3 V. In TTL systems, an open collector driver
with a pull-up resistor may be used.
The resistor values may be selected by first choosing a value for
R1 and then selecting R2 according to the following equation:
V

R2 = R1×  OUT −1
 1.30

If the shutdown function is not being used, then it should be
connected to GND.
The input leakage current on VSET is 10 nA maximum. This allows large resistor values to be chosen for R1 and R2 with little
degradation in accuracy. For example, a 1 MΩ resistor may be
selected for R1, and then R2 may be calculated accordingly.
The tolerance on VSET is guaranteed at less than ± 30 mV so in
most applications, fixed resistors will be suitable.
VIN
+2V TO +16V
INPUT
SENSE
RCL
ADM663A
ADM666A
Low Supply or Low Battery Detection
The ADM666A contains on-chip circuitry for low power supply
or battery detection. If the voltage on the LBI pin falls below the
internal 1.3 V reference, then the open drain output LBO will
go low. The low threshold voltage may be set to any voltage
above 1.3 V by appropriate resistor divider selection.
+1.3V TO +15V
OUTPUT
V

R3 = R4  BATT −1
 1.3 V

VOUT(2)
R2
SHDN
GND
where R3 and R4 are the resistive divider resistors and VBATT is
the desired low voltage threshold.
VSET
R1
Since the LBI input leakage current is less than 10 nA, large values may be selected for R3 and R4 in order to minimize loading.
For example, a 6 V low threshold may be set using 10 MΩ for
R3 and 2.7 M Ω for R4.
Figure 5. Adjustable Output
+2V TO +16V
INPUT
Table I. Output Voltage Selection
VSET
VOUT
GND
VIN
R1/R2
+5 V
+3 V
ADJ
VIN
SENSE
RCL
ADM666A
R3
R2
VSET
R4
SHDN
Current limiting may be achieved by using an external current
sense resistor in series with VOUT(2). When the voltage across
the sense resistor exceeds the internal 0.5 V threshold, current
limiting is activated. The sense resistor is therefore chosen such
that the voltage across it will be 0.5 V when the desired current
limit is reached.
GND
LBO
R1
LOW
BATTERY
OUTPUT
Figure 6. ADM666A Adjustable Output with Low Battery
Detection
High Current Operation
The ADM663A contains an additional output, VOUT1, suitable
for directly driving the base of an external NPN transistor. Figure 7 shows a configuration which can be used to provide +5 V
with boosted current drive. A 1 Ω current sensing resistor limits
the current at 0.5 A.
0.5
=
ICL
where RCL is the current sense resistor, ICL is the maximum
current limit.
VIN
The value chosen for RCL should also ensure that the current is
limited to less than the 100 mA absolute maximum rating and
also that the power dissipation will also be within the package
maximum ratings.
VIN
+
2N4237
VOUT1
10µ F
ADM663A
If current limiting is employed, there will be an additional voltage drop across the sense resistor that must be considered when
determining the regulators dropout voltage.
VOUT2
100Ω
SHDN
1.0Ω
SHUTDOWN
If current limiting is not used, the SENSE input should be connected to VOUT(2).
VSET
GND
SENSE
+
10µF
Shutdown Input (SHDN)
The SHDN input allows the regulator to be turned off with a
logic level signal. This will disable the output and reduce
REV. 0
VOUT
LBI
Current Limiting
RCL
+1.3V TO +15V
OUTPUT
+5V, 0.5A
OUTPUT
Figure 7. ADM663A Boosted Output Current (0.5 A)
–5–
ADM663A/ADM666A
be kept within the maximum limits. The package power dissipation is calculated from the product of the voltage differential
across the regulator times the current being supplied to the load.
The power dissipation must be kept within the maximum limits
given in the Absolute Maximum Ratings section.
Temperature Proportional Output
The ADM663A contains a VTC output with a positive temperature coefficient of +2.5 mV/°C. This may be connected to the
summing junction of the error amplifier (VSET) through a resistor resulting in a negative temperature coefficient at the output
of the regulator. This is especially useful in multiplexed LCD
displays to compensate for the inherent negative temperature
coefficient of the LCD threshold. At +25°C the voltage at the
VTC output is typically 0.9 V. The equations for setting both
the output voltage and the tempco are given below. If this function is not being used, then VTC should be left unconnected.
PD = (VIN–VOUT)(IL)
The die temperature is dependent on both the ambient temperature and on the power being dissipated by the device. The
ADM663A/ADM666A contains an internal thermal limiting circuit which will shut down the regulator if the internal die temperature exceeds 125°C. Therefore, care must be taken to
ensure that, under normal operating conditions, the die temperature is kept below the thermal limit.

R2  R2
V OUT = V SET 1 +
(V SET − VTC )
+

R1  R3
TCV OUT =
TJ = TA + PD (θJA)
– R2
(TCV TC )
R3
This may be expressed in terms of power dissipation as follows:
PD = (TJ – TA)/(θJA)
where VSET = +1.3 V, VTC = +0.9 V, TCVTC = +2.5 mV/°C
where:
SENSE
TJ = Die Junction Temperature (°C)
VOUT2
VOUT
ADM663A
TA = Ambient Temperature (°C)
R2
PD = Power Dissipation (W)
VSET
R3
θJA = Junction to Ambient Thermal Resistance (°C/W)
R1
If the device is being operated at the maximum permitted ambient temperature of 85°C the maximum power dissipation permitted is:
VTC
PD (max) = (TJ (max) – TA)/(θJA)
Figure 8. ADM663A Temperature Proportional Output
PD (max) = (125 – 85)/(θJA)
APPLICATION HINTS
Input-Output (Dropout Voltage)
= 40/θJA
A regulator’s minimum input-output differential or dropout
voltage determines the lowest input voltage for a particular output voltage. The ADM663A/ADM666A dropout voltage is 1 V
at its rated output current. For example when used as a fixed
+5 V regulator, the minimum input voltage is +6 V. At lower
output currents (IOUT < 10 mA) on the ADM663A, VOUT1 may
be used as the output driver in order to achieve lower dropout
voltages. In this case the dropout voltage depends on the voltage
drop across the internal FET transistor. This may be calculated
by multiplying the FET’s saturation resistance by the output
current, for example with VIN = 9 V, RSAT = 20 Ω. Therefore,
the dropout voltage for 5 mA is 100 mV. As the current limit
circuitry is referenced to VOUT2, VOUT2 should be connected to
VOUT1. For high current operation VOUT2 should be used alone
and VOUT1 left unconnected.
VIN
+6V TO +16V
INPUT
θJA = 170°C/W for the 8-pin SOIC (R-8) package
Therefore, for a maximum ambient temperature of 85°C
PD (max) = 333 mW for N-8
PD (max) = 235 mW for R-8
At lower ambient temperatures the maximum permitted power
dissipation increases accordingly up to the maximum limits
specified in the absolute maximum specifications.
The thermal impedance (θJA) figures given are measured in still
air conditions and are reduced considerably where fan assisted
cooling is employed. Other techniques for reducing the thermal
impedance include large contact pads on the printed circuit
board and wide traces. The copper will act as a heat exchanger
thereby reducing the effective thermal impedance.
SENSE
ADM663A
GND
High Power Dissipation Recommendations
Where excessive power dissipation due to high input-output differential voltages and or high current conditions exists, the simplest method of reducing the power requirements on the
regulator is to use a series dropper resistor. In this way the excess power can be dissipated in the external resistor. As an example, consider an input voltage of +12 V and an output
voltage requirement of +5 V @ 100 mA with an ambient temperature of +85°C. The package power dissipation under these
conditions is 700 mW which exceeds the maximum ratings. By
using a dropper resistor to drop 4 V, the power dissipation requirement for the regulator is reduced to 300 mW which is
within the maximum specifications for the N-8 package at
VOUT2
VOUT1
VSET
θJA = 120°C/W for the 8-pin DIP (N-8) package
+5V
OUTPUT
SHDN
Figure 9. Low Current, Low Dropout Configuration
Thermal Considerations
The ADM663A/ADM666A can supply up to 100 mA load current and can operate with input voltages up to 16.5 V, but the
package power dissipation and hence the die temperature must
–6–
REV. 0
ADM663A/ADM666A
+85°C. The resistor value is calculated as R = 4/0.1 = 40 Ω. A
resistor power rating of 400 mW or greater may be used.
An input capacitor helps reduce noise, improves dynamic performance and reduces the input dV/dt at the regulator input. A
suitable input capacitor is 0.1 µF or greater.
Bypass Capacitors
The high frequency performance of the ADM663A/ADM666A
may be improved by decoupling the ouput using a filter capacitor. A capacitor of 0.1 µF is suitable.
Typical Performance Characteristics
80
12
VINDC = +9V
TA = +25°C
VIN p-p = +2V
VOUT DC = +5V
10
TA = +25°C
60
8
IIN – µA
PSRR – dB
VOUT = +5V
40
6
VOUT = +3.3V
4
20
2
0
0.01
0
0.1
1
10
100
1000
2
10000
4
6
FREQUENCY – Hz
Figure 10. Power Supply Rejection Ratio vs. Frequency
14
16
1.0
TA = +25°C
1.8
VIN = +2V
0.9
TA = +25°C
1.6
0.8
1.4
0.7
|VIN – VOUT| – Volts
(V IN – VOUT ) – Volts
12
Figure 12. Quiescent Current vs. Input Voltage
2.0
1.2
1.0
0.8
0.6
VIN = +9V
0.4
VIN = +2V
0.6
VIN = +15V
0.5
VIN = +9V
0.4
0.3
0.2
VIN = +15V
0.2
0.1
0
0
2
4
6
8
10
12
14
16
18
0
20
IOUT1 – mA
0
10
20
30
IOUT2 – mA
40
50
Figure 13. VOUT2 Input-Output Differential vs.
Output Current
Figure 11. VOUT1 Input-Output Differential vs.
Output Current
REV. 0
8
10
VIN – Volts
–7–
ADM663A/ADM666A
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Pin Plastic DIP
8
C1939–18–7/94
(N-8)
5
0.280 (7.11)
0.240 (6.10)
PIN 1
1
4
0.325 (8.25)
0.300 (7.62)
0.430 (10.92)
0.348 (8.84)
0.060 (1.52)
0.015 (0.38)
0.210
(5.33)
MAX
0.150
(3.81)
MIN
0.160 (4.06)
0.115 (2.93)
0.100
(2.54)
BSC
0.022 (0.558)
0.014 (0.356)
0.070 (1.77)
0.045 (1.15)
0.195 (4.95)
0.115 (2.93)
0.015 (0.381)
0.008 (0.204)
SEATING
PLANE
8-Terminal SO
(R-8)
8
5
0.1574 (4.00)
0.1497 (3.80)
PIN 1
0.2440 (6.20)
0.2284 (5.80)
4
1
0.1968 (5.00)
0.1890 (4.80)
0.0196 (0.50)
x 45 °
0.0099 (0.25)
0.102 (2.59)
0.094 (2.39)
0.0500
(1.27)
BSC
0.0192 (0.49)
0.0138 (0.35)
0.0098 (0.25)
0.0075 (0.19)
8°
0°
0.0500 (1.27)
0.0160 (0.41)
PRINTED IN U.S.A.
0.0098 (0.25)
0.0040 (0.10)
–8–
REV. 0
ADM663A/ADM666A
ORDERING GUIDE
Model
Temperature
Range
Package
Option*
ADM663AAN
ADM663AAR
ADM666AAN
ADM666AAR
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
N-8
R-8
N-8
R-8
*For outline information see Package Information section.
REV. 0
–9–