ADC084S101 Datasheet PDF - National Semiconductor

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ADC084S101
National Semiconductor

Part Number ADC084S101
Description 10-Bit A/D Converter
Page 19 Pages


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May 2005
ADC104S101
4 Channel, 1 MSPS, 10-Bit A/D Converter
General Description
The ADC104S101 is a low-power, four-channel CMOS 10-bit
analog-to-digital converter with a high-speed serial interface.
Unlike the conventional practice of specifying performance
at a single sample rate only, the ADC104S101 is fully speci-
fied over a sample rate range of 500 kSPS to 1 MSPS. The
converter is based on a successive-approximation register
architecture with an internal track-and-hold circuit. It can be
www.DataSheet4U.ccoomnfigured to accept up to four input signals at inputs IN1
through IN4.
The output serial data is straight binary, and is compatible
with several standards, such as SPI, QSPI, MICROW-
IRE, and many common DSP serial interfaces.
The ADC104S101 operates with a single supply, that can
range from +2.7V to +5.25V. Normal power consumption
using a +3V or +5V supply is 3.9 mW and 11.4 mW, respec-
tively. The power-down feature reduces the power consump-
tion to just 0.12 µW using a +3.6V supply, or 0.47 µW using
a +5.5V supply.
The ADC104S101 is packaged in a 10-lead MSOP package.
Operation over the industrial temperature range of −40˚C to
+85˚C is guaranteed.
Features
n Specified over a range of sample rates.
n Four input channels
n Variable power management
n Single power supply with 2.7V - 5.25V range
Key Specifications
n DNL
n INL
n SNR
n Power Consumption
— 3V Supply
— 5V Supply
+0.26/−0.16 LSB (typ)
+0.4/−0.1 LSB (typ)
61.7 dB (typ)
3.9 mW (typ)
11.4 mW (typ)
Applications
n Portable Systems
n Remote Data Acquisition
n Instrumentation and Control Systems
Pin-Compatible Alternatives by Resolution and Speed
All devices are fully pin and function compatible.
Resolution
Specified for Sample Rates of:
50 to 200 kSPS
200 to 500 kSPS
500 kSPS to 1 MSPS
12-bit
ADC124S021
ADC124S051
ADC124S101
10-bit
ADC104S021
ADC104S051
ADC104S101
8-bit
ADC084S021
ADC084S051
ADC084S101
Connection Diagram
20125005
TRI-STATE® is a trademark of National Semiconductor Corporation
QSPIand SPIare trademarks of Motorola, Inc.
© 2005 National Semiconductor Corporation DS201250
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Ordering Information
Order Code
ADC104S101CIMM
ADC104S101CIMMX
ADC104S101EVAL
Temperature Range
−40˚C to +85˚C
−40˚C to +85˚C
Block Diagram
Description
10-Lead MSOP Package
10-Lead MSOP Package, Tape & Reel
Evaluation Board
Top Mark
X26C
X26C
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20125007
Pin Descriptions and Equivalent Circuits
Pin No.
ANALOG I/O
4-7
DIGITAL I/O
10
9
8
1
POWER SUPPLY
2
3
Symbol
IN1 to IN4
SCLK
DOUT
DIN
CS
VA
GND
Description
Analog inputs. These signals can range from 0V to VA.
Digital clock input. This clock directly controls the conversion
and readout processes.
Digital data output. The output samples are clocked out of this
pin on falling edges of the SCLK pin.
Digital data input. The ADC104S101’s Control Register is
loaded through this pin on rising edges of the SCLK pin.
Chip select. On the falling edge of CS, a conversion process
begins. Conversions continue as long as CS is held low.
Positive supply pin. This pin should be connected to a quiet
+2.7V to +5.25V source and bypassed to GND with a 1 µF
capacitor and a 0.1 µF monolithic capacitor located within 1
cm of the power pin.
The ground return for the analog supply and signals.
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Absolute Maximum Ratings (Notes 1, 2)
Operating 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 VA
Voltage on Any Pin to GND
Input Current at Any Pin (Note 3)
−0.3V to 6.5V
−0.3V to VA +0.3V
±10 mA
Operating Temperature Range
VA Supply Voltage
Digital Input Pins Voltage Range
Clock Frequency
Analog Input Voltage
−40˚C TA +85˚C
+2.7V to +5.25V
−0.3V to VA
0.8 MHz to 16 MHz
0V to VA
Package Input Current(Note 3)
Power Consumption at TA = 25˚C
ESD Susceptibility (Note 5)
±20 mA
See (Note 4)
Package Thermal Resistance
Package
θJA
Human Body Model
2500V
10-lead MSOP
190˚C / W
Machine Model
Junction Temperature
Storage Temperature
250V
+150˚C
−65˚C to +150˚C
Soldering process must comply with National Semiconduc-
tor’s Reflow Temperature Profile specifications. Refer to
www.national.com/packaging. (Note 6)
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ADC104S101 Converter Electrical Characteristics (Note 9)
The following specifications apply for VA = +2.7V to 5.25V, GND = 0V, CL = 50 pF, fSCLK = 8 MHz to 16 MHz,
fSAMPLE = 500 kSPS to 1 MSPS, unless otherwise noted. Boldface limits apply for TA = TMIN to TMAX; all other limits TA =
25˚C.
Symbol
Parameter
Conditions
Typical
Limits
(Note 7)
Units
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes
10 Bits
INL Integral Non-Linearity
+0.4
−0.1
+0.7
−0.5
LSB (max)
LSB (min)
DNL
VOFF
OEM
FSE
Differential Non-Linearity
Offset Error
Channel to Channel Offset Error Match
Full_Scale Error
+0.26
−0.16
+0.19
0.02
−0.15
+0.6
−0.6
±0.6
±0.6
±0.7
LSB (max)
LSB (min)
LSB (max)
LSB (max)
LSB (max)
FSEM
Channel to Channel Full_Scale Error
Match
0.02
±0.5
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
SINAD Signal-to-Noise Plus Distortion Ratio
VA = +2.7V to 5.25V
fIN = 40.3 kHz, −0.02 dBFS
61.6 61 dB (min)
SNR
Signal-to-Noise Ratio
VA = +2.7V to 5.25V
fIN = 40.3 kHz, −0.02 dBFS
61.7
61.3
dB (min)
THD
Total Harmonic Distortion
VA = +2.7V to 5.25V
fIN = 40.3 kHz, −0.02 dBFS
−82 −72 dB (max)
SFDR Spurious-Free Dynamic Range
VA = +2.7V to 5.25V
fIN = 40.3 kHz, −0.02 dBFS
83 75 dB (min)
ENOB Effective Number of Bits
VA = +2.7V to 5.25V
fIN = 40.3 kHz, −0.02 dBFS
9.9 9.8 Bits (min)
Channel-to-Channel Crosstalk
VA = +5.25V
−78 dB
fIN = 40.3 kHz
Intermodulation Distortion, Second Order VA = +5.25V
−82
Terms
IMD
fa = 40.161 kHz, fb = 41.015 kHz
Intermodulation Distortion, Third Order VA = +5.25V
−81
Terms
fa = 40.161 kHz, fb = 41.015 kHz
dB
dB
FPBW -3 dB Full Power Bandwidth
VA = +5V
VA = +3V
11 MHz
8 MHz
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ADC104S101 Converter Electrical Characteristics (Note 9) (Continued)
The following specifications apply for VA = +2.7V to 5.25V, GND = 0V, CL = 50 pF, fSCLK = 8 MHz to 16 MHz,
fSAMPLE = 500 kSPS to 1 MSPS, unless otherwise noted. Boldface limits apply for TA = TMIN to TMAX; all other limits TA =
25˚C.
Symbol
Parameter
Conditions
Typical
Limits
(Note 7)
Units
ANALOG INPUT CHARACTERISTICS
VIN
IDCL
CINA
Input Range
DC Leakage Current
Input Capacitance
Track Mode
Hold Mode
0 to VA
33
3
±1
V
µA (max)
pF
pF
DIGITAL INPUT CHARACTERISTICS
VIH Input High Voltage
www.DataSheet4U.comVIL
Input Low Voltage
IIN Input Current
CIND
Digital Input Capacitance
DIGITAL OUTPUT CHARACTERISTICS
VA = +5.25V
VA = +3.6V
VIN = 0V or VA
2.4 V (min)
2.1 V (min)
0.8 V (max)
±0.2 ±10 µA (max)
2 4 pF (max)
VOH
VOL
IOZH,
IOZL
COUT
Output High Voltage
Output Low Voltage
TRI-STATE® Leakage Current
TRI-STATE® Output Capacitance
Output Coding
ISOURCE = 200 µA
ISOURCE = 1 mA
ISINK = 200 µA
ISINK = 1 mA
VA − 0.03
VA − 0.1
0.03
0.1
VA − 0.5
0.4
V (min)
V
V (max)
V
±0.01
±1
µA (max)
2 4 pF (max)
Straight (Natural) Binary
POWER SUPPLY CHARACTERISTICS (CL = 10 pF)
VA Supply Voltage
2.7
5.25
V (min)
V (max)
Supply Current, Normal Mode
(Operational, CS low)
IA
Supply Current, Shutdown (CS high)
Power Consumption, Normal Mode
(Operational, CS low)
PD Power Consumption, Shutdown (CS
high)
AC ELECTRICAL CHARACTERISTICS
VA = +5.25V,
fSAMPLE = 1 MSPS, fIN = 40 kHz
VA = +3.6V,
fSAMPLE = 1 MSPS, fIN = 40 kHz
VA = +5.25V,
fSAMPLE = 0 kSPS
VA = +3.6V,
fSAMPLE = 0 kSPS
VA = +5.25V
VA = +3.6V
VA = +5.25V
VA = +3.6V
2.18
1.08
90
33
11.4
3.9
0.47
0.12
2.7 mA (max)
1.3 mA (max)
nA
14.2
4.7
nA
mW (max)
mW (max)
µW
µW
fSCLK
Clock Frequency
(Note 8)
8 MHz (min)
16 MHz (max)
fS Sample Rate
(Note 8)
500 kSPS (min)
1 MSPS (max)
tCONV
DC
Conversion Time
SCLK Duty Cycle
fCLK = 16 MHz
13 SCLK cycles
30 % (min)
50
70 % (max)
tACQ
Track/Hold Acquisition Time
Throughput Time
Full-Scale Step Input
Acquisition Time + Conversion
Time
3 SCLK cycles
16 SCLK cycles
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