PDF《MCP3204/3208》

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2008 Microchip Technology Inc.

DS21298E-page

1 MCP3204/3208 Features ? 12-bit resolution ? ±

1 LSB max DNL ? ±

1 LSB max INL (MCP3204/3208-B) ? ±

2 LSB max INL (MCP3204/3208-C) ?

4 (MCP3204) or

8 (MCP3208) input channels ? Analog inputs programmable as single-ended or pseudo-differential pairs ? On-chip sample and hold ? SPI serial interface (modes 0,0 and 1,1) ? Single supply operation: 2.7V - 5.5V ?

100 ksps max. sampling rate at VDD = 5V ?

50 ksps max. sampling rate at VDD = 2.7V ? Low power CMOS technology: -

500 nA typical standby current,

2 ?A max. -

400 ?A max. active current at 5V ? Industrial temp range: -40°C to +85°C ? Available in PDIP, SOIC and TSSOP packages Applications ? Sensor Interface ? Process Control ? Data Acquisition ? Battery Operated Systems Functional Block Diagram Description The Microchip Technology Inc. MCP3204/3208 devices are successive approximation 12-bit Analog- to-Digital (A/D) Converters with on-board sample and hold circuitry. The MCP3204 is programmable to provide two pseudo-differential input pairs or four single-ended inputs. The MCP3208 is programmable to provide four pseudo-differential input pairs or eight single-ended inputs. Differential Nonlinearity (DNL) is specified at ±1 LSB, while Integral Nonlinearity (INL) is offered in ±1 LSB (MCP3204/3208-B) and ±2 LSB (MCP3204/3208-C) versions. Communication with the devices is accomplished using a simple serial interface compatible with the SPI protocol. The devices are capable of conversion rates of up to

100 ksps. The MCP3204/3208 devices operate over a broad voltage range (2.7V - 5.5V). Low current design permits operation with typical standby and active currents of only

500 nA and

320 ?A, respectively. The MCP3204 is offered in 14-pin PDIP,

150 mil SOIC and TSSOP packages. The MCP3208 is offered in 16-pin PDIP and SOIC packages. Package Types Comparator Sample and Hold 12-Bit SAR DAC Control Logic CS/SHDN VREF VSS VDD CLK DOUT Shift Register CH0 Channel Mux Input CH1 CH7* * Note: Channels 5-7 available on MCP3208 Only DIN VDD CLK DOUT MCP3204

1 2

3 4

14 13

12 11

10 9

8 5

6 7 VREF DIN CH0 CH1 CH2 CH3 CS/SHDN DGND AGND NC VDD CLK DOUT MCP3208

1 2

3 4

16 15

14 13

12 11

10 9

5 6

7 8 VREF DIN CS/SHDN DGND CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 NC AGND PDIP, SOIC, TSSOP PDIP, SOIC 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface MCP3204/3208 DS21298E-page

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2008 Microchip Technology Inc. 1.0 ELECTRICAL CHARACTERISTICS Absolute 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 Soldering temperature of leads (10 seconds)300°C ESD protection on all pins.4 kV ?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 operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. ELECTRICAL SPECIFICATIONS Electrical Characteristics: Unless otherwise noted, all parameters apply at VDD = 5V, VSS = 0V, VREF = 5V, TA = -40°C to +85°C,fSAMPLE =

100 ksps and fCLK = 20*fSAMPLE Parameters Sym Min Typ Max Units Conditions Conversion Rate Conversion Time tCONV ― ―

12 clock cycles Analog Input Sample Time tSAMPLE 1.5 clock cycles Throughput Rate fSAMPLE ― ― ― ―