MCP3204 Datasheet, PDF (1/20 Pages) Microchip Technology – 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI Serial Interface

MCP3204/3208
2.7V 4-Channel/8-Channel 12-Bit A/D Converters
with SPI^® Serial Interface
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
• 100ksps max. sampling rate at V_DD = 5V
• 50ksps max. sampling rate at V_DD = 2.7V
• Low power CMOS technology
- 500 nA typical standby current, 2µA max.
- 400 µA 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
DESCRIPTION
The Microchip Technology Inc. MCP3204/3208
devices are successive approximation 12-bit Ana-
log-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 sin-
gle-ended inputs. The MCP3208 is programmable to
provide four pseudo-differential input pairs or eight sin-
gle-ended inputs. Differential Nonlinearity (DNL) is
specified at ±1 LSB, and Integral Nonlinearity (INL) is
offered in ±1 LSB (MCP3204/3208-B) and ±2 LSB
(MCP3204/3208-C) versions. Communication with the
devices is done using a simple serial interface compat-
ible with the SPI protocol. The devices are capable of
conversion rates of up to 100ksps. The MCP3204/3208
devices operate over a broad voltage range (2.7V -
5.5V). Low current design permits operation with typi-
cal standby and active currents of only 500nA and
320µA, respectively. The MCP3204 is offered in 14-pin
PDIP, 150mil SOIC and TSSOP packages, and the
MCP3208 is offered in 16-pin PDIP and SOIC pack-
ages.
PACKAGE TYPES
PDIP, SOIC, TSSOP
CH0 1
CH1 2
CH2 3
CH3 4
NC 5
NC 6
DGND 7
14 V_DD
13 V_REF
12 AGND
11 CLK
10 D_OUT
9 D_IN
8 CS/SHDN
PDIP, SOIC
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
16 V_DD
15 V_REF
14 AGND
13 CLK
12 D_OUT
11 D_IN
10 _CS/SHDN
9 DGND
FUNCTIONAL BLOCK DIAGRAM
CH0
CH1
CH7*
Input
Channel
Mux
Sample
and
Hold
V_REF
V_DD V_SS
DAC
Comparator
12-Bit SAR
Control Logic
Shift
Register
CS/SHDN D_IN CLK
D_OUT
*Note: Channels 5-7 available on MCP3208 Only
© 1999 Microchip Technology Inc.
Preliminary
DS21298B-page 1