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ADS7841-Q1 Datasheet Preview

ADS7841-Q1 Datasheet

Analog-to-Digital Converter

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ADS7841-Q1
www.ti.com
SBAS469C – MARCH 2009 – REVISED OCTOBER 2012
12-BIT 4-CHANNEL SERIAL-OUTPUT SAMPLING ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS7841-Q1
FEATURES
1
• Qualified for Automotive Applications
• Single Supply: 2.7 V To 5 V
• Four-Channel Single-Ended Or Two-Channel
Differential Input
• Up To 200-kHz Conversion Rate
• ±2 LSB Max INL and DNL
• No Missing Codes
• 71-dB Typ SINAD
• Serial Interface
• Alternate Source For MAX1247
V
CC
CH0
CH1
CH2
CH3
COM
SHDN
V
REF
DBQ PACKAGE
(TOP VIEW)
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
DCLK
CS
DIN
BUSY
DOUT
MODE
GND
V
CC
DESCRIPTION
The ADS7841 is a 4-channel 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial
interface. The resolution is programmable to either 8 bits or 12 bits. Typical power dissipation is 2 mW at a 200-
kHz throughput rate and a 5-V supply. The reference voltage (VREF) can be varied between 100 mV and VCC,
providing a corresponding input voltage range of 0 V to VREF. The device includes a shutdown mode that reduces
power dissipation to under 15 μW. The ADS7841 is specified down to 2.7-V operation.
Low power, high speed, and on-board multiplexer make the ADS7841 ideal for battery-operated systems. The
serial interface also provides low-cost isolation for remote data acquisition. The ADS7841 is available in a SSOP-
16 package.
SAR
DCLK
CH0
CH1
CH2
CH3
COM
VREF
Four
Channel
Multiplexer
CDAC
Comparator
Serial
Interface
and
Control
CS
SHDN
DIN
DOUT
MODE
BUSY
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009–2012, Texas Instruments Incorporated




etcTI

ADS7841-Q1 Datasheet Preview

ADS7841-Q1 Datasheet

Analog-to-Digital Converter

No Preview Available !

ADS7841-Q1
SBAS469C – MARCH 2009 – REVISED OCTOBER 2012
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
TA
–40°C to 85°C
–40°C to 125°C
ORDERING INFORMATION(1)
ORDERABLE PART NUMBER
ADS7841EIDBQRQ1
ADS7841ESQDBQRQ1
TOP-SIDE MARKING
S7841E
S7841S
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
TERMINAL
NAME
NO.
VCC
1
CH0
2
CH1
3
CH2
4
CH3
5
COM
6
SHDN
7
VREF
8
VCC
9
GND
10
MODE
11
DOUT
12
BUSY
13
DIN
14
CS
15
DCLK
16
TERMINAL FUNCTIONS
I/O
DESCRIPTION
Power supply
I Analog input channel 0
I Analog input channel 1
I Analog input channel 2
I Analog input channel 3
I
Ground reference for analog inputs. Sets zero code voltage in single-ended mode. Connect this pin to ground
or ground reference point.
I Shutdown. When low, the device enters a very low power shutdown mode.
I Voltage reference
Power supply
Ground
I
Conversion mode. When low, the device always performs a 12-bit conversion. When high, the resolution is
set by the MODE bit in the CONTROL byte.
O
Serial data output. Data is shifted on the falling edge of DCLK. This output is high-impedance when CS is
high.
O Busy output. This output is high-impedance when CS is high.
I Serial data input. If CS is low, data is latched on rising edge of DCLK.
I Chip select input. Controls conversion timing and enables the serial input/output register.
I External clock input. This clock runs the SAR conversion process and synchronizes serial data I/O.
2
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Copyright © 2009–2012, Texas Instruments Incorporated
Product Folder Links: ADS7841-Q1



Part Number ADS7841-Q1
Description Analog-to-Digital Converter
Maker etcTI
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