ADC121S101 Datasheet PDF - National Semiconductor
| Part Number | ADC121S101 | |
| Description | 1MSPS/ 12-/10-/8-Bit A/D Converters in SOT-23 | |
| Manufacturers | National Semiconductor | |
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June 2004
ADC121S101/ADC101S101/ADC081S101
1MSPS, 12-/10-/8-Bit A/D Converters in SOT-23
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™, QSPI™, MICROWIRE™,
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 VDD. 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 is 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 µW 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. These products are
designed for operation over the automotive/extended indus-
trial temperature range of −40˚C to +125˚C.
Features
n Variable power management
n Packaged in 6-lead SOT-23
n Power supply used as reference
n Single +2.7V to +5.25V supply operation
n SPI™/QSPI™/MICROWIRE™/DSP compatible
Key Specifications
n Resolution with no Missing Codes
n Conversion Rate
n DNL
n INL
n Power Consumption
— 3V Supply
— 5V Supply
12/10/8 bits
1 MSPS
+0.5, -0.3 LSB (typ)
± 0.4 LSB (typ)
2 mW (typ)
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™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a trademark of National Semiconductor Corporation.
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2004 National Semiconductor Corporation DS201102
www.national.com
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ADC121S101/ADC101S101/ADC081S101 Specifications(Note 2) (Continued)
ADC101S101 Converter Electrical Characteristics
The following specifications apply for VDD = +2.7V to 5.25V, fSCLK = 20 MHz, fSAMPLE = 1 MSPS unless otherwise noted. Bold-
face limits apply for TA = −40˚C to +85˚C: all other limits TA = 25˚C, 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)
VOFF
GE
Offset Error
Gain Error
±0.1
±0.2
±0.7
±1
LSB (max)
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
SINAD
SNR
THD
SFDR
IMD
Signal-to-Noise Plus Distortion Ratio
Signal-to-Noise Ratio
Total Harmonic Distortion
Spurious-Free Dynamic Range
Intermodulation Distortion, Second
Order Terms
Intermodulation Distortion, Third
Order Terms
fIN = 100 kHz
fIN = 100 kHz
fIN = 100 kHz
fIN = 100 kHz
fa = 103.5 kHz, fb = 113.5 kHz
fa = 103.5 kHz, fb = 113.5 kHz
61.7
62
-77
78
61 dBFS (min)
dB
-73 dB (max)
74 dB (min)
-78 dB
-78 dB
FPBW -3 dB Full Power Bandwidth
+5V Supply
+3V Supply
11 MHz
8 MHz
POWER SUPPLY CHARACTERISTICS
VDD Supply Voltage
2.7
5.25
V (min)
V (max)
Normal Mode (Static)
VDD = +4.75V to +5.25V,
SCLK On or Off
VDD = +2.7V to +3.6V,
SCLK On or Off
2
1
mA
mA
IDD
Normal Mode (Operational)
Shutdown Mode
Power Consumption, Normal Mode
(Operational)
PD
Power Consumption, Shutdown Mode
ANALOG INPUT CHARACTERISTICS
VDD = +4.75V to +5.25V,
fSAMPLE = 1 MSPS
VDD = +2.7V to +3.6V,
fSAMPLE = 1 MSPS
VDD = +5V, SCLK Off
VDD = +5V, SCLK On
VDD = +5V, fSAMPLE = 1 MSPS
VDD = +3V, fSAMPLE = 1 MSPS
VDD = +5V, SCLK Off
VDD = +3V, SCLK Off
2.0 3.5 mA (max)
0.6 1.6 mA (max)
0.5 µA (max)
60 µA (max)
10
17.5
mW (max)
2 4.8 mW (max)
2.5 µW (max)
1.5 µW (max)
VIN Input Range
IDCL DC Leakage Current
CINA
Input Capacitance
DIGITAL INPUT CHARACTERISTICS
0 to VDD
30
±1
V
µA (max)
pF
VIH
VIL
IIN
CIND
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
VDD = +5V
VDD = +3V
VIN = 0V or VDD
2.4 V (min)
0.8 V (max)
0.4 V (max)
±10 nA ±1 µA (max)
2 4 pF (max)
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADC121S101 electronic component. |
| Information | Total 22 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADC121S101.PDF Datasheet ] | |
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