MCP3208-CI/ST

Part: MCP3204/MCP3208 — Microchip Technology Inc.

Type: 12-Bit SAR A/D Converter with SPI Interface

Description: 2.7–5.5 V, 4-channel (MCP3204) / 8-channel (MCP3208) 12-bit SAR ADC with SPI interface, up to 100 ksps at 5 V and ±1 LSB max DNL.

Operating Conditions:

• Supply voltage: 2.7–5.5 V
• Operating temperature: -40 to +85 °C (electrical characteristics specified at TA = -40 to +85 °C; the temperature characteristics table lists -40 to +125 °C)
• Max sampling rate: 100 ksps at VDD = 5 V, 50 ksps at VDD = 2.7 V
• Clock frequency: up to 2.0 MHz at 5 V, 1.0 MHz at 2.7 V

Absolute Maximum Ratings:

• Max supply voltage (VDD): 7.0 V
• Voltage on all inputs and outputs w.r.t. VSS: -0.6 V to VDD + 0.6 V
• Storage temperature: -65 to +150 °C
• Ambient temperature with power applied: -65 to +125 °C
• ESD protection on all pins: > 4 kV

Key Specs:

• Resolution: 12 bits
• INL: ±1 LSB max (-B), ±2 LSB max (-C)
• DNL: ±0.5 LSB typ, ±1 LSB max (no missing codes over temperature)
• Offset error: ±1.25 LSB typ, ±3 LSB max; gain error: ±1.25 LSB typ, ±5 LSB max
• SINAD: 72 dB typ; THD: -82 dB typ; SFDR: 86 dB typ (VIN = 0.1–4.9 V at 1 kHz)
• Operating current: 320 μA typ, 400 μA max (VDD = VREF = 5 V); 225 μA typ at 2.7 V
• Standby current: 0.5 μA typ, 2.0 μA max (CS = VDD = 5 V)
• Reference voltage range: 0.25 V to VDD; reference current drain 100 μA typ, 150 μA max
• Conversion time: 12 clock cycles; sample time 1.5 clock cycles

Features:

• Programmable single-ended or pseudo-differential inputs
• On-chip sample and hold
• SPI modes 0,0 and 1,1
• Low-power CMOS technology
• Straight binary data coding

Applications:

• Sensor interface
• Process control
• Data acquisition
• Battery-operated systems

Package:

• MCP3204: 14-pin PDIP, 150 mil SOIC, TSSOP
• MCP3208: 16-pin PDIP, SOIC

• 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 V DD = 5V
• 50 ksps max. sampling rate at V DD = 2.7V
• Low power CMOS technology:
• -500 nA typical standby current, 2 μA max.
• -400 μA max. active current at 5V
• Industrial temp range: -40°C to +85°C
• Available in PDIP, SOIC and TSSOP packages

• Sensor Interface
• Process Control
• Data Acquisition
• Battery Operated Systems

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1: PIN FUNCTION TABLE

Note 1: This parameter is established by characterization and not 100% tested.

• 2: See graphs that relate linearity performance to V REF levels.

3: Because the sample cap will eventually lose charge, effective clock rates below 10 kHz can affect linearity performance, particularly at elevated temperatures. See Section 6.2 'Maintaining Minimum Clock Speed' , 'Maintaining Minimum Clock Speed', for more information.

†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.