MAX1270AEAI Maxim Integrated Products, MAX1270AEAI Datasheet

no-image

MAX1270AEAI

Manufacturer Part Number
MAX1270AEAI
Description
Manufacturer
Maxim Integrated Products
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1270AEAI+
Manufacturer:
Maxim
Quantity:
40
Part Number:
MAX1270AEAI+
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX1270/MAX1271 are multirange, 12-bit data-
acquisition systems (DAS) that require only a single
+5V supply for operation, yet accept signals at their
analog inputs that can span above the power-supply
rail and below ground. These systems provide eight
analog input channels that are independently software
programmable for a variety of ranges: ±10V, ±5V, 0 to
+10V, 0 to +5V for the MAX1270; ±V
V
ing increases the effective dynamic range to 14 bits and
provides the flexibility to interface 4–20mA, ±12V, and
±15V powered sensors directly to a single +5V system.
In addition, these converters are fault protected to
±16.5V; a fault condition on any channel will not affect
the conversion result of the selected channel. Other fea-
tures include a 5MHz bandwidth track/hold, software-
selectable internal/external clock, 110ksps throughput
rate, and internal 4.096V or external reference operation.
The MAX1270/MAX1271 serial interface directly
connects to SPI™/QSPI™ and MICROWIRE™ devices
without external logic.
A hardware shutdown input (SHDN) and two software-
programmable power-down modes, standby (STBYPD)
or full power-down (FULLPD), are provided for low-cur-
rent shutdown between conversions. In standby mode,
the reference buffer remains active, eliminating startup
delays.
The MAX1270/MAX1271 are available in 24-pin narrow
PDIP or space-saving 28-pin SSOP packages.
19-4782; Rev 2; 9/04
Ordering Information continued at end of data sheet.
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.
MAX1270ACNG
MAX1270BCNG
MAX1270ACAI
MAX1270BCAI
REF
Industrial Control Systems
Data-Acquisition Systems
Battery-Powered
Instruments
, 0 to V
PART
REF
/2 for the MAX1271. This range switch-
________________________________________________________________ Maxim Integrated Products
TEMP RANGE PIN-PACKAGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
General Description
Automatic Testing
Robotics
Medical Instruments
24 Narrow PDIP
24 Narrow PDIP
28 SSOP
28 SSOP
Applications
REF
, ±V
REF
/2, 0 to
(LSB)
Multirange, +5V, 8-Channel,
±0.5
±0.5
INL
±1
±1
♦ 12-Bit Resolution, 0.5 LSB Linearity
♦ +5V Single-Supply Operation
♦ SPI/QSPI and MICROWIRE-Compatible
♦ Four Software-Selectable Input Ranges
♦ Eight Analog Input Channels
♦ 110ksps Sampling Rate
♦ ±16.5V Overvoltage-Tolerant Input Multiplexer
♦ Internal 4.096V or External Reference
♦ Two Power-Down Modes
♦ Internal or External Clock
♦ 24-Pin Narrow PDIP or 28-Pin SSOP Packages
Pin Configurations appear at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
4.7µF
3-Wire Interface
MAX1270: 0 to +10V, 0 to +5V, ±10V, ±5V
MAX1271: 0 to V
±V
ANALOG
INPUTS
REF
Serial 12-Bit ADCs
/2
0.01µF
Typical Operating Circuit
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
REF
REFADJ
REF
0.1µF
DGND
, 0 to V
MAX1270
MAX1271
AGND
REF
SSTRB
+5V
DOUT
SHDN
SCLK
V
DD
DIN
CS
/2, ±V
Features
REF
MC68HCXX
I/O
SCK
MOSI
MISO
,
1

Related parts for MAX1270AEAI

MAX1270AEAI Summary of contents

Page 1

... SSOP MAX1270BCAI 0°C to +70°C 28 SSOP Ordering Information continued at end of data sheet. ________________________________________________________________ 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. Multirange, +5V, 8-Channel, ♦ 12-Bit Resolution, 0.5 LSB Linearity ♦ +5V Single-Supply Operation ♦ ...

Page 2

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to AGND............................................................-0.3V to +6V DD AGND to DGND.....................................................-0.3V to +0.3V CH0–CH7 to AGND ......................................................... ±16.5V REF, REFADJ to AGND ..............................-0. SSTRB, DOUT to DGND.............................-0. SHDN, CS, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values are T A PARAMETER SYMBOL ANALOG ...

Page 4

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values ...

Page 5

ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values are T A PARAMETER SYMBOL Conversion ...

Page 6

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs TIMING CHARACTERISTICS (V = +4.75V to +5.25V; unipolar/bipolar range; external reference mode 2.0MHz (MAX127_B 1.8MHz (MAX127_A); T CLK (Figures 10) PARAMETER SYMBOL DIN to SCLK Setup DIN ...

Page 7

Operating Circuit +5V; external reference mode 110ksps +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) ...

Page 8

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs (Typical Operating Circuit +5V; external reference mode 110ksps +25°C, unless otherwise noted.) A AVERAGE SUPPLY CURRENT vs. CONVERSION RATE (USING STANDBY 5V, INTERNAL REFERENCE, DD ...

Page 9

Figure 1. Reference-Adjust Circuit Detailed Description Converter Operation The MAX1270/MAX1271 multirange, fault-tolerant ADCs use successive approximation and internal track/hold (T/H) circuitry to convert an analog signal to a 12-bit digital output. Figure 3 shows the ...

Page 10

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Input Bandwidth The ADC’s input small-signal bandwidth depends on the selected input range and varies from 1.5MHz to 5MHz (see Electrical Characteristics). The MAX1270B/ MAX1271B maximum sampling rate is 110ksps (100ksps for the MAX1270A/MAX1271A). ...

Page 11

Table 1. Control-Byte Format BIT 7 BIT 6 BIT 5 (MSB) START SEL2 SEL1 BIT NAME First logic 1 after CS goes low defines the beginning of the control byte. 7 (MSB) START SEL2, SEL1 These 3 ...

Page 12

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Input data (control byte) is clocked in at DIN at the ris- ing edge of SCLK. CS enables communication with the MAX1270/MAX1271. After CS falls, the first arriving logic 1 bit represents the start ...

Page 13

CS t SDV SSTRB HIGH-Z SCLK Figure 7. External Clock Mode—SSTRB Detailed Timing CS SCLK 1 8 CONTROL BYTE 0 MSB LSB START SEL2 SEL1 SEL0 RNG BIP PD1 PD0 DIN 18 SCLK HIGH-Z SSTRB HIGH-Z DOUT ACQUISITION A/D STATE ...

Page 14

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs CS SCLK 1 DIN START SEL2 SEL1 SEL0 RNG MSB SSTRB HIGH-Z DOUT A/D STATE Figure 9. Internal Clock Mode—20 SCLK/Conversion Timing CS t CSH SSTRB SCLK SCLK #8 Figure 10. Internal Clock Mode—SSTRB ...

Page 15

SCLK CONTROL BYTE Ø START SEL2 SEL1 SEL0 RNG BIP PD1 PD0 DIN 13 SCLK SSTRB HIGH-Z DOUT ACQUISITION CONVERSION A/D STATE Figure 11. Internal Clock Mode—13 Clocks/Conversion Timing CS SCLK 1 8 CONTROL BYTE Ø START ...

Page 16

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs REF MAX1270 MAX1271 A = 1.638 V REFADJ 10kΩ 2.5V Figure 13a. Internal Reference REF MAX1270 MAX1271 A = 1.638 V REFADJ 10kΩ 2.5V Figure 13b. External Reference—Reference at REF REF MAX1270 MAX1271 A ...

Page 17

OUTPUT CODE FULL-SCALE 11... 111 TRANSITION 11... 110 11... 101 00... 011 00... 010 00... 001 00... 000 INPUT VOLTAGE (LSB) Figure 14a. Unipolar Transfer Function Transfer Function Output data coding for the MAX1270/MAX1271 is bina- ...

Page 18

... PDIP Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX1270AENG -40°C to +85°C 24 Narrow PDIP MAX1270BENG -40°C to +85°C 24 Narrow PDIP MAX1270AEAI -40°C to +85°C 28 SSOP MAX1270BEAI -40°C to +85°C 28 SSOP MAX1271ACNG 0°C to +70°C 24 Narrow PDIP MAX1271BCNG 0°C to +70°C 24 Narrow PDIP MAX1271ACAI 0° ...

Page 19

For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Package Information 19 ...

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 © 2004 Maxim Integrated Products Package Information (continued) ...

Related keywords