Document
MCP3001
2.7V 10-Bit A/D Converter with SPI™ Serial Interface
Features
• 10-bit resolution • ±1 LSB max DNL • ±1 LSB max INL • On-chip sample and hold • SPI™ serial interface (modes 0,0 and 1,1) • Single supply operation: 2.7V - 5.5V • 200 ksps sampling rate at 5V • 75 ksps sampling rate at 2.7V • Low power CMOS technology
- 5 nA typical standby current, 2 µA max - 500 µA max active current at 5V • Industrial temp range: -40°C to +85°C • 8-pin PDIP, SOIC, MSOP and TSSOP packages
Applications
• Sensor Interface • Process Control • Data Acquisition • Battery Operated Systems
Description
The Microchip Technology Inc. MCP3001 is a successive approximation 10-bit A/D converter (ADC) with onboard sample and hold circuitry. The device provides a single pseudo-differential input. Differential Nonlinearity (DNL) and Integral Nonlinearity (INL) are both specified at ±1 LSB max. Communication with the device is done using a simple serial interface compatible with the SPI protocol. The device is capable of sample rates up to 200 ksps at a clock rate of 2.8 MHz. The MCP3001 operates over a broad voltage range (2.7V - 5.5V). Low current design permits operation with a typical standby current of only 5 nA and a typical active current of 400 µA. The device is offered in 8-pin PDIP, MSOP, TSSOP and 150 mil SOIC packages.
Package Types PDIP, MSOP, SOIC, TSSOP
VREF 1 IN+ 2 IN– 3 VSS 4
MCP3001
8 VDD 7 CLK 6 DOUT 5 CS/SHDN
Illustration not to scale
Functional Block Diagram
VREF
VDD VSS
IN+ Sample
and
IN-
Hold
DAC
Comparator 10-Bit SAR
Control Logic
Shift Register
CS/SHDN CLK
DOUT
SPI™ is a trademark of Motorola Inc.
© 2007 Microchip Technology Inc.
DS21293C-page 1
MCP3001
1.0 ELECTRICAL CHARACTERISTICS
1.1 Maximum Ratings*
VDD......................................................................... 7.0V All inputs and outputs w.r.t. VSS ...... -0.6V to VDD +0.6V Storage temperature ..........................-65°C to +150°C
Ambient temp. with power applied .....-65°C to +125°C
ESD protection on all pins (HBM)........................> 4kV
*Notice: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
PIN FUNCTION TABLE
Name
VDD VSS IN+ INCLK DOUT CS/SHDN VREF
Function +2.7V to 5.5V Power Supply Ground Positive Analog Input Negative Analog Input Serial Clock Serial Data Out Chip Select/Shutdown Input Reference Voltage Input
ELECTRICAL CHARACTERISTICS
All parameters apply at VDD = 5V, VSS = 0V, VREF = 5V, TAMB = -40°C to +85°C, fSAMPLE = 200 ksps and fCLK = 14*fSAMPLE, unless otherwise noted. Typical values apply for VDD = 5V, TAMB =25°C, unless otherwise noted.
Parameter
Sym
Min
Typ
Max Units
Conditions
Conversion Rate:
Conversion Time
tCONV
—
—
10
clock
cycles
Analog Input Sample Time
tSAMPLE
1.5
clock
cycles
Throughput Rate DC Accuracy:
fSAMPLE
—
—
200
ksps VDD = VREF = 5V
75
ksps VDD = VREF = 2.7V
Resolution
10
bits
Integral Nonlinearity
INL
—
±0.5
±1
LSB
Differential Nonlinearity
DNL
—
±0.25
±1
LSB No missing codes over temperature
Offset Error
—
—
±1.5
LSB
Gain Error
—
—
±1
LSB
Dynamic Performance:
Total Harmonic Distortion
THD
—
-76
—
dB VIN = 0.1V to 4.9V@1 kHz
Signal to Noise and Distortion
SINAD
—
61
—
dB VIN = 0.1V to 4.9V@1 kHz
(SINAD)
Spurious Free Dynamic Range
SFDR
—
80
—
dB VIN = 0.1V to 4.9V@1 kHz
Reference Input:
Voltage Range
VREF
0.25
—
VDD
V Note 2
Current Drain
IREF
—
90
150
µA
0.001
3
µA CS = VDD = 5V
Note 1: This parameter is guaranteed by characterization and not 100% tested.
2: See graph that relates linearity performance to VREF level. 3: Because the sample cap will eventually lose charge, clock rates below 10 kHz can affect linearity perfor-
mance, especially at elevated temperatures.
DS21293C-page 2
© 2007 Microchip Technology Inc.
MCP3001
All parameters apply at VDD = 5V, VSS = 0V, VREF = 5V, TAMB = -40°C to +85°C, fSAMPLE = 200 ksps and fCLK = 14*fSAMPLE, unless otherwise noted. Typical values apply for VDD = 5V, TAMB =25°C, unless otherwise noted.
Parameter
Sym
Min
Typ
Max Units
Conditions
Temperature Ranges:
Specified Temperature Range
TA
Operating Temperature Range
TA
Storage Temperature Range
TA
Thermal Package Resistance:
Thermal Resistance, 8L-PDIP
θJA
Thermal Resistance, 8L-SOIC
θJA
Thermal Resistance, 8L-MSOP
θJA
Thermal Resistance, 8L-TSSOP
θJA
Analog Inputs:
-40
—
+85
°C
-40
—
+85
°C
-65
—
+150
°C
—
85
—
°C/W
—
163
—
°C/W
—
206
—
°C/W
—
—
°C/W
Input Voltage Range (IN+) Input .