MAX1143BCAP-T Maxim Integrated, MAX1143BCAP-T Datasheet

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MAX1143BCAP-T

Manufacturer Part Number
MAX1143BCAP-T
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1143BCAP-T

Number Of Channels
1
Architecture
SAR
Conversion Rate
200 KSPs
Resolution
14 bit
Input Type
Single-Ended
Snr
82 dB
Interface Type
QSPI, Serial (SPI, Microwire)
Operating Supply Voltage
4.75 V to 5.25 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
SSOP-20
Maximum Power Dissipation
640 mW
Minimum Operating Temperature
0 C
Number Of Converters
1
Voltage Reference
4.096 V
The MAX1142/MAX1143 are 200ksps, 14-bit ADCs.
These serially interfaced ADCs connect directly to
SPI™, QSPI™, and MICROWIRE™ devices without
external logic. They combine an input scaling network,
internal track/hold, a clock, +4.096V reference, and
three general-purpose digital output pins (for external
multiplexer or PGA control) in a 20-pin SSOP package.
The excellent dynamic performance (SINAD ≥ 81dB),
high-speed (200ksps), and low power (7.5mA) of these
ADCs, make them ideal for applications such as indus-
trial process control, instrumentation, and medical
applications. The MAX1142 accepts input signals of 0
to +12V (unipolar) or ±12V (bipolar), while the
MAX1143 accepts input signals of 0 to +4.096V (unipo-
lar) or ±4.096V (bipolar). Operating from a single
+4.75V to +5.25V analog supply and a +4.75V to
+5.25V digital supply, power-down modes reduce cur-
rent consumption to 1mA at 10ksps and further reduce
supply current to less than 20µA at slower data rates.
A serial strobe output (SSTRB) allows direct connection
to the TMS320-family of digital signal processors. The
MAX1142/MAX1143 user can select either the internal
clock, or an external serial-interface clock for the ADC
to perform analog-to-digital conversions.
The MAX1142/MAX1143 feature internal calibration cir-
cuitry to correct linearity and offset errors. On-demand
calibration allows the user to optimize performance.
Three user-programmable logic outputs are provided
for the control of an 8-channel MUX or a PGA.
19-2037; Rev 0; 5/01
Functional Diagram appears at end of data sheet.
Typical Application Circuit appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered Equipment
________________________________________________________________ Maxim Integrated Products
14-Bit ADC, 200ksps, +5V Single-Supply
General Description
Applications
Ordering Information continued at end of data sheet.
MAX1142ACAP
MAX1142BCAP
200ksps (Bipolar) and 150ksps (Unipolar)
Sampling ADC
14-Bits, No Missing Codes
1LSB INL Guaranteed
81dB (min) SINAD
+5V Single-Supply Operation
Low Power Operation, 7.5mA (Unipolar Mode)
2.5µA Shutdown Mode
Software-Configurable Unipolar & Bipolar Input
Ranges
Internal or External Clock
SPI/QSPI/MICROWIRE-Compatible Wire Serial
Interface
Three User-Programmable Logic Outputs
Small 20-Pin SSOP Package
TOP VIEW
PART
0 to +12V and ±12V (MAX1142)
0 to +4.096V and ±4.096V (MAX1143)
Internal or External Reference
REFADJ
SSTRB
SHDN
AGND
DGND
AV
REF
DD
P2
P1
P0
TEMP. RANGE
with Reference
0 C to +70 C
0 C to +70 C
10
1
2
3
4
5
6
7
8
9
Ordering Information
MAX1142
MAX1143
SSOP
Pin Configuration
20
19
18
17
16
15
14
13
12
11
20 SSOP
20 SSOP
PACKAGE
AIN
AGND
CREF
CS
DIN
DV
DGND
SCLK
RST
DOUT
PIN-
DD
Features
(LSB)
INL
1
2
1

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MAX1143BCAP-T Summary of contents

Page 1

... Typical Application Circuit appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...

Page 2

ADC, 200ksps, +5V Single-Supply with Reference ABSOLUTE MAXIMUM RATINGS AV to AGND DGND .............................-0. AGND to DGND.....................................................-0.3V to +0.3V AIN to AGND.....................................................................±16.5V REFADJ, CREF, REF to AGND.................-0.3V to (AV Digital Inputs to DGND.............................................-0.3V ...

Page 3

ADC, 200ksps, +5V Single-Supply ELECTRICAL CHARACTERISTICS (continued) ( +5V ±5 4.8MHz, external clock (50% duty cycle), 24 clocks/conversion (200ksps), bipolar input, external DD DD SCLK V = +4.096V REF ...

Page 4

ADC, 200ksps, +5V Single-Supply with Reference ELECTRICAL CHARACTERISTICS (continued) ( +5V ±5 4.8MHz, external clock (50% duty cycle), 24 clocks/conversion (200ksps), bipolar input, external DD DD SCLK V = +4.096V ...

Page 5

ADC, 200ksps, +5V Single-Supply TIMING CHARACTERISTICS (Figures 5 and 6) ( +5V ±5 MIN PARAMETER SYMBOL Acquisition Time DIN to SCLK Setup DIN to SCLK Hold SCLK to ...

Page 6

ADC, 200ksps, +5V Single-Supply with Reference (MAX1142/MAX1143 + lar input, external REF = +4.096V, 0.22µF bypassing on REFADJ, 2.2µF on REF, 1µF on CREF, T INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE ...

Page 7

ADC, 200ksps, +5V Single-Supply (MAX1142/MAX1143 + lar input, external REF = +4.096V, 0.22µF bypassing on REFADJ, 2.2µF on REF, 1µF on CREF, T NORMALIZED REF VOLTAGE vs. TEMPERATURE 1.010 1.005 1 ...

Page 8

ADC, 200ksps, +5V Single-Supply with Reference PIN NAME Reference Buffer Output/ADC Reference Input. Reference voltage for analog-to-digital conversion. In internal reference mode, the reference buffer provides a +4.096V nominal output, externally adjustable at 1 REF REFADJ. In external reference ...

Page 9

ADC, 200ksps, +5V Single-Supply Detailed Description The MAX1142/MAX1143 analog-to-digital converters (ADCs) use a successive-approximation technique and input track/hold (T/H) circuitry to convert an analog signal to a 14-bit digital output. The MAX1142/MAX1143 easily interfaces to microprocessors (µPs). The data ...

Page 10

ADC, 200ksps, +5V Single-Supply with Reference User-Programmable Outputs The MAX1142/MAX1143 have three user-programma- ble outputs: P0, P1 and P2. The power-on default state for the programmable outputs is zero. These are push- pull CMOS outputs suitable for driving a ...

Page 11

ADC, 200ksps, +5V Single-Supply Table 2. User-Programmable Outputs PROGRAMMED POWER-ON OUTPUT THROUGH PIN CONTROL- BYTE P2 Bit 2 P1 Bit 1 P0 Bit 0 In external clock mode, SSTRB is high-impedance when CS is high. In external clock mode, ...

Page 12

ADC, 200ksps, +5V Single-Supply with Reference CS t ACQ 1 4 SCLK UNI/ INT START BIP EXT DIN SSTRB DOUT A/D IDLE STATE Figure 3. Long Acquisition Mode (32-Clock Cycles) External Clock, Bipolar Mode CS t ACQ ...

Page 13

ADC, 200ksps, +5V Single-Supply The falling edge of CS does NOT start a conversion on the MAX1142/MAX1143. The first logic high clocked into DIN is interpreted as a start bit and defines the first bit of the Control-Byte. A ...

Page 14

ADC, 200ksps, +5V Single-Supply with Reference An external reference can be placed at either the input (REFADJ) or the output (REF) of the MAX1142/ MAX1143’s internal buffer amplifier. When connecting an external reference to REFADJ, the input impedance is ...

Page 15

ADC, 200ksps, +5V Single-Supply Acquisition is 5.5 clock cycles in short acquisition mode and 13.5 clock cycles in long acquisition mode. Short acquisition mode is 24 clock cycles per conver- sion. Using the external clock to run the conversion ...

Page 16

ADC, 200ksps, +5V Single-Supply with Reference Offsets resulting from synchronous noise (such as the conversion clock) are canceled by the MAX1142/ MAX1143’s calibration scheme. The magnitude of the offset produced by a synchronous signal depends on the signal’s shape. ...

Page 17

ADC, 200ksps, +5V Single-Supply quately bypassed, add an additional 1µF or 10µF low- ESR capacitor in parallel with the primary bypass capacitor. Transfer Function Figures 10 and 11 show the MAX1142/MAX1143’s transfer functions. In unipolar mode, the output data ...

Page 18

... TRANSISTOR COUNT: 21,807 PROCESS : BiCMOS 18 ______________________________________________________________________________________ through 2.2 F Ordering Information (continued) PART MAX1142AEAP MAX1142BEAP MAX1143ACAP* MAX1143BCAP* MAX1143AEAP* MAX1143BEAP* *Future product—contact factory for availability. Typical Application Circuit +5V 0 SHDN +5V MAX1142 DV DD 0.1 F MAX1143 AIN TO DGND MC68HCXX I/O CS SCLK ...

Page 19

ADC, 200ksps, +5V Single-Supply AV DD AGND 9k CREF REFERENCE REFADJ REF AIN INPUT SCALING NETWORK ANALOG TIMING CONTROL DV DD DGND CS SERIAL MEMORY SCLK INPUT PORT DIN RST CLOCK CONTROL GENERATOR SHDN ______________________________________________________________________________________ with Reference Functional Diagram ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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