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Электронный компонент: ADC081S101EVAL

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ADC121S101/ADC101S101/ADC081S101
1MSPS, 12-/10-/8-Bit A/D Converters in SOT-23 & LLP
General Description
The ADC121S101, ADC101S101, and ADC081S101 are low
power, monolithic CMOS 12-, 10- and 8-bit analog-to-digital
converters that operate at 1 MSPS. Each device is based on
a successive approximation register architecture with inter-
nal track-and-hold. The serial interface is compatible with
several standards, such as SPI
TM
, QSPI
TM
, MICROWIRE
TM
,
and many common DSP serial interfaces.
The ADC121S101/101S101/081S101 uses the supply volt-
age as a reference. This enables the devices to operate with
a full-scale input range of 0 to V
DD
. The conversion rate is
determined from the serial clock (SCLK) speed. These con-
verters offer a shutdown mode, which can be used to trade
throughput for power consumption. The ADC121S101/
101S101/081S101 are operated with a single supply that
can range from +2.7V to +5.25V. Normal power consumption
during continuous conversion, using a +3V or +5V supply, is
2 mW or 10 mW, respectively. The power down feature,
which is enabled by a chip select (CS) pin, reduces the
power consumption to under 5 W using a +5V supply. All
three converters are available in a 6-lead SOT-23 package,
which provides an extremely small footprint for applications
where space is a critical consideration. The ADC081S101 is
also available in a 6-lead LLP package. These products are
designed for operation over the industrial temperature range
of -40C to +85C, with some parameters specified to
+125C for the ADC121S101.
Features
n
Variable power management
n
Packaged in 6-lead SOT-23 (ADC081S101 also
available in a 6-Lead LLP package)
n
Power supply used as reference
n
Single +2.7V to +5.25V supply operation
n
SPI
TM
/QSPI
TM
/MICROWIRE
TM
/DSP compatible
Key Specifications
n
Resolution with no Missing Codes
12/10/8 bits
n
Conversion Rate
1 MSPS
n
DNL (ADC121S101)
+0.5, -0.3 LSB (typ)
n
INL (ADC121S101)
0.4 LSB (typ)
n
Power Consumption
-- 3V Supply
2 mW (typ)
-- 5V Supply
10 mW (typ)
Applications
n
Automotive Navigation
n
FA/ATM Equipment
n
Portable Systems
n
Medical Instruments
n
Mobile Communications
n
Instrumentation and Control Systems
Connection Diagram
20110201
MICROWIRE
TM
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a trademark of National Semiconductor Corporation.
QSPI
TM
and SPI
TM
are trademarks of Motorola, Inc.
January 2005
ADC121S101/ADC101S101/ADC081S101
1MSPS,
12-/10-/8-Bit
A/D
Converters
in
SOT
-23
&
LLP
2005 National Semiconductor Corporation
DS201102
www.national.com
Ordering Information
Order Code
Temperature
Range
Description
Top Mark
ADC121S101CIMF
-40C to
+125C
6-Lead SOT-23 Package
X01C
ADC101S101CIMF
-40C to +85C
6-Lead SOT-23 Package
X02C
ADC081S101CIMF
-40C to +85C
6-Lead SOT-23 Package
X03C
ADC121S101CIMFX
-40C to
+125C
6-Lead SOT-23 Package, Tape & Reel
X01C
ADC101S101CIMFX
-40C to +85C
6-Lead SOT-23 Package, Tape & Reel
X02C
ADC081S101CIMFX
-40C to +85C
6-Lead SOT-23 Package, Tape & Reel
X03C
ADC081S101CISDX
-40C to +85C
6-Lead LLP Package, Tape & Reel
X3C
ADC081S101CISD
-40C to +85C
6-Lead LLP Package, Tape & Partial Reel
X3C
ADC121S101EVAL
SOT-23 Evaluation Board
ADC101S101EVAL
SOT-23 Evaluation Board
ADC081S101EVAL
SOT-23 Evaluation Board
Pin Descriptions
Pin No.
Symbol
Description
ANALOG I/O
3
V
IN
Analog input. This signal can range from 0V to V
DD
.
DIGITAL I/O
4
SCLK
Digital clock input. The range of frequencies for this input is 10 kHz to 20 MHz, with
guaranteed performance at 20 MHz. This clock directly controls the conversion and readout
processes.
5
SDATA
Digital data output. The output words are clocked out of this pin by the SCLK pin.
6
CS
Chip select. A conversion process begins on the falling edge of CS.
POWER SUPPLY
1
V
DD
Positive supply pin. These pins should be connected to a quiet +2.7V to +5.25V source and
bypassed to GND with 0.1 F and 1 F monolithic capacitors located within 1 cm of the
power pin. The ADC121S101/101S101/081S101 uses this power supply as a reference, so it
should be thoroughly bypassed.
2
GND
The ground return for the supply.
Block Diagram
20110218
ADC121S101/ADC101S101/ADC081S101
www.national.com
2
Absolute Maximum Ratings
(Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage V
DD
-0.3V to +6.5V
Voltage on Any Analog Pin to GND
-0.3V to V
DD
+0.3V
Voltage on Any Digital Pin to GND
-0.3V to 6.5V
Input Current at Any Pin (Note 5)
10 mA
ESD Susceptibility
Human Body Model
Machine Model
3500V
200V
Soldering Temperature, Infrared,
10 seconds
215C
Junction Temperature
+150C
Storage Temperature
-65C to +150C
Soldering process must comply with National
Semiconductor's Reflow Temperature Profile
specifications. Refer to www.national.com/packaging.
(Note 4)
Operating Ratings
(Note 2)
Operating Temperature Range
ADC121S101
ADC101S101 & ADC081S101
-40C
T
A
+125C
-40C
T
A
+85C
V
DD
Supply Voltage
+2.7V to +5.25V
Digital Input Pins Voltage Range
(Note 6)
+2.7V to +5.25V
Package Thermal Resistance
Package
JA
6-Lead SOT-23
265C / W
6-Lead LLP
94C / W
ADC121S101 Converter Electrical Characteristics
The following specifications apply for V
DD
= +2.7V to 5.25V, f
SCLK
= 20 MHz, f
SAMPLE
= 1 MSPS unless otherwise noted. Bold-
face limits apply for T
A
= -40C to +85C: all other limits T
A
= 25C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical
Limits
Units
STATIC CONVERTER CHARACTERISTICS (V
DD
= 2.7V to 3.6V)
Resolution with No Missing Codes
-40C
T
A
125C
12
Bits
INL
Integral Non-Linearity
-40C
T
A
85C
0.4
1
LSB (max)
T
A
= 125C
+1
-1.1
LSB (min)
LSB (max)
DNL
Differential Non-Linearity
-40C
T
A
85C
+0.5
-0.3
+1
-0.9
LSB (max)
LSB (min)
T
A
= 125C
1
LSB (max)
V
OFF
Offset Error
-40C
T
A
125C
0.1
1.2
LSB (max)
GE
Gain Error
-40C
T
A
125C
0.2
1.2
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS (f
IN
= 100 kHz, -0.02 dBFS sine wave unless otherwise noted)
SINAD
Signal-to-Noise Plus Distortion Ratio
-40C
T
A
125C
72
70
dB (min)
SNR
Signal-to-Noise Ratio
-40C
T
A
85C
72.5
70.8
dB (min)
T
A
= 125C
70.6
dB (min)
THD
Total Harmonic Distortion
-80
dB
SFDR
Spurious-Free Dynamic Range
82
dB
IMD
Intermodulation Distortion, Second
Order Terms
f
a
= 103.5 kHz, f
b
= 113.5 kHz
-78
dB
Intermodulation Distortion, Third
Order Terms
f
a
= 103.5 kHz, f
b
= 113.5 kHz
-78
dB
FPBW
-3 dB Full Power Bandwidth
+5V Supply
11
MHz
+3V Supply
8
MHz
POWER SUPPLY CHARACTERISTICS
V
DD
Supply Voltage
-40C
T
A
125C
2.7
V (min)
5.25
V (max)
ADC121S101/ADC101S101/ADC081S101
www.national.com
3
ADC121S101 Converter Electrical Characteristics
(Continued)
The following specifications apply for V
DD
= +2.7V to 5.25V, f
SCLK
= 20 MHz, f
SAMPLE
= 1 MSPS unless otherwise noted. Bold-
face limits apply for T
A
= -40C to +85C: all other limits T
A
= 25C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical
Limits
Units
POWER SUPPLY CHARACTERISTICS
I
DD
Normal Mode (Static)
V
DD
= +4.75V to +5.25V,
SCLK On or Off
2
mA
V
DD
= +2.7V to +3.6V,
SCLK On or Off
1
mA
Normal Mode (Operational)
V
DD
= +4.75V to +5.25V,
f
SAMPLE
= 1 MSPS
2.0
3.2
mA (max)
V
DD
= +2.7V to +3.6V,
f
SAMPLE
= 1 MSPS
0.6
1.5
mA (max)
Shutdown Mode
V
DD
= +5V, SCLK Off
0.5
A
V
DD
= +5V, SCLK On
60
A
P
D
Power Consumption, Normal Mode
(Operational)
V
DD
= +5V, f
SAMPLE
= 1 MSPS
10
16
mW (max)
V
DD
= +3V, f
SAMPLE
= 1 MSPS
2
4.5
mW (max)
Power Consumption, Shutdown Mode
V
DD
= +5V, SCLK Off
2.5
W
V
DD
= +3V, SCLK Off
1.5
W
ANALOG INPUT CHARACTERISTICS
V
IN
Input Range
0 to V
DD
V
I
DCL
DC Leakage Current
1
A (max)
C
INA
Input Capacitance (Note 3)
30
pF
DIGITAL INPUT CHARACTERISTICS
V
IH
Input High Voltage
2.4
V (min)
V
IL
Input Low Voltage
V
DD
= +5V
0.8
V (max)
V
DD
= +3V
0.4
V (max)
I
IN
Input Current
V
IN
= 0V or V
DD
10 nA
1
A (max)
C
IND
Input Capacitance (Note 3)
2
4
pF (max)
DIGITAL OUTPUT CHARACTERISTICS
V
OH
Output High Voltage
I
SOURCE
= 200 A,
V
DD
= +2.7V to +5.25V
V
DD
-0.2
V (min)
V
OL
Output Low Voltage
I
SINK
= 200 A
0.4
V (max)
I
OL
TRI-STATE Leakage Current
10
A (max)
C
OUT
TRI-STATE Output Capacitance
2
4
pF (max)
Output Coding
Straight (Natural) Binary
AC ELECTRICAL CHARACTERISTICS
f
SCLK
Clock Frequency
20
MHz (max)
DC
SCLK Duty Cycle
40
60
% (min)
% (max)
t
TH
Track/Hold Acquisition Time
400
ns (max)
f
RATE
Throughput Rate
See Serial Interface Section
1
MSPS
(max)
t
AD
Aperture Delay
3
ns
t
AJ
Aperture Jitter
30
ps
ADC121S101/ADC101S101/ADC081S101
www.national.com
4
ADC101S101 Converter Electrical Characteristics
The following specifications apply for V
DD
= +2.7V to 5.25V, f
SCLK
= 20 MHz, f
SAMPLE
= 1 MSPS unless otherwise noted. Bold-
face limits apply for T
A
= -40C to +85C: all other limits T
A
= 25C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical
Limits
Units
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes
10
Bits
INL
Integral Non-Linearity
0.2
0.7
LSB (max)
DNL
Differential Non-Linearity
+0.3
-0.2
0.7
LSB (max)
LSB (max)
V
OFF
Offset Error
0.1
0.7
LSB (max)
GE
Gain Error
0.2
1
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
SINAD
Signal-to-Noise Plus Distortion Ratio
f
IN
= 100 kHz
61.7
61
dBFS (min)
SNR
Signal-to-Noise Ratio
f
IN
= 100 kHz
62
dB
THD
Total Harmonic Distortion
f
IN
= 100 kHz
-77
-73
dB (max)
SFDR
Spurious-Free Dynamic Range
f
IN
= 100 kHz
78
74
dB (min)
IMD
Intermodulation Distortion, Second
Order Terms
f
a
= 103.5 kHz, f
b
= 113.5 kHz
-78
dB
Intermodulation Distortion, Third
Order Terms
f
a
= 103.5 kHz, f
b
= 113.5 kHz
-78
dB
FPBW
-3 dB Full Power Bandwidth
+5V Supply
11
MHz
+3V Supply
8
MHz
POWER SUPPLY CHARACTERISTICS
V
DD
Supply Voltage
2.7
5.25
V (min)
V (max)
I
DD
Normal Mode (Static)
V
DD
= +4.75V to +5.25V,
SCLK On or Off
2
mA
V
DD
= +2.7V to +3.6V,
SCLK On or Off
1
mA
Normal Mode (Operational)
V
DD
= +4.75V to +5.25V,
f
SAMPLE
= 1 MSPS
2.0
3.2
mA (max)
V
DD
= +2.7V to +3.6V,
f
SAMPLE
= 1 MSPS
0.6
1.5
mA (max)
Shutdown Mode
V
DD
= +5V, SCLK Off
0.5
A (max)
V
DD
= +5V, SCLK On
60
A (max)
P
D
Power Consumption, Normal Mode
(Operational)
V
DD
= +5V, f
SAMPLE
= 1 MSPS
10
16
mW (max)
V
DD
= +3V, f
SAMPLE
= 1 MSPS
2
4.5
mW (max)
Power Consumption, Shutdown Mode
V
DD
= +5V, SCLK Off
2.5
W (max)
V
DD
= +3V, SCLK Off
1.5
W (max)
ANALOG INPUT CHARACTERISTICS
V
IN
Input Range
0 to V
DD
V
I
DCL
DC Leakage Current
1
A (max)
C
INA
Input Capacitance (Note 3)
30
pF
DIGITAL INPUT CHARACTERISTICS
V
IH
Input High Voltage
2.4
V (min)
V
IL
Input Low Voltage
V
DD
= +5V
0.8
V (max)
V
DD
= +3V
0.4
V (max)
I
IN
Input Current
V
IN
= 0V or V
DD
10 nA
1
A (max)
C
IND
Input Capacitance (Note 3)
2
4
pF (max)
DIGITAL OUTPUT CHARACTERISTICS
V
OH
Output High Voltage
I
SOURCE
= 200 A,
V
DD
= +2.7V to +5.25V
V
DD
-0.2
V (min)
ADC121S101/ADC101S101/ADC081S101
www.national.com
5