MAX1282ACEE Maxim Integrated, MAX1282ACEE Datasheet

no-image

MAX1282ACEE

Manufacturer Part Number
MAX1282ACEE
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1282ACEE

Number Of Channels
4/2
Architecture
SAR
Conversion Rate
400 KSPs
Resolution
12 bit
Input Type
Single-Ended/Pseudo-Differential
Interface Type
4-Wire (SPI, Microwire, QSPI, TMS320)
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Power Dissipation
535 mW
Number Of Converters
1
Voltage Reference
2.5 V
The MAX1282/MAX1283 12-bit analog-to-digital convert-
ers (ADCs) combine a 4-channel analog-input multiplexer,
high-bandwidth track/hold (T/H), and serial interface with
high conversion speed and low power consumption. The
MAX1282 operates from a single +4.5V to +5.5V supply;
the MAX1283 operates from a single +2.7V to +3.6V sup-
ply. Both devices’ analog inputs are software configurable
for unipolar/bipolar and single-ended/pseudo-differential
operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™/MICROWIRE™ devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1282/
MAX1283 use an external serial-interface clock to perform
successive-approximation analog-to-digital conversions.
The devices feature an internal +2.5V reference and a ref-
erence-buffer amplifier with a ±1.5% voltage-adjustment
range. An external reference with a 1V to V
also be used.
The MAX1282/MAX1283 provide a hardwired SHDN pin
and four software-selectable power modes (normal opera-
tion, reduced power (REDP), fast power-down (FASTPD),
and full power-down (FULLPD)). These devices can be
programmed to automatically shut down at the end of a
conversion or to operate with reduced power. When using
the power-down modes, accessing the serial interface
automatically powers up the devices, and the quick turn-
on time allows them to be shut down between all conver-
sions.
The MAX1282/MAX1283 are available in 16-pin TSSOP
packages.
Typical Operating Circuit appears at end of data sheet.
19-1688; Rev 0; 5/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
________________________________________________________________ Maxim Integrated Products
General Description
Applications
DD
range may
♦ 4-Channel Single-Ended or 2-Channel
♦ Internal Multiplexer and Track/Hold
♦ Single-Supply Operation
♦ Internal +2.5V Reference
♦ 400kHz Sampling Rate (MAX1282)
♦ Low Power: 2.5mA (400ksps)
♦ SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
♦ Software-Configurable Unipolar or Bipolar Inputs
♦ 16-Pin TSSOP Package
MAX1282BCUE
MAX1282BEUE
MAX1283BCUE
MAX1283BEUE
Pseudo-Differential Inputs
Serial Interface
TOP VIEW
+4.5V to +5.5V (MAX1282)
+2.7V to +3.6V (MAX1283)
PART
SHDN
V
COM
CH0
CH1
CH2
CH3
REF
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
DD1
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
1
2
6
3
4
5
7
8
RANGE
TEMP.
Ordering Information
MAX1282/
MAX1283
TSSOP
Pin Configuration
PIN-
PACKAGE
16 TSSOP
16 TSSOP
16 TSSOP
16 TSSOP
16
15
14
13
12
11
10
9
V
SCLK
CS
DIN
SSTRB
DOUT
GND
REFADJ
DD2
Features
(LSB)
INL
±1
±1
±1
±1
1

Related parts for MAX1282ACEE

MAX1282ACEE Summary of contents

Page 1

... Typical Operating 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 free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. ...

Page 2

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference ABSOLUTE MAXIMUM RATINGS GND ........................................................... -0. ....................................................... -0.3V to +0.3V DD1 DD2 CH0–CH3, COM to GND .......................... -0. REF, REFADJ ...

Page 3

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1282 (continued +4.5V to +5.5V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER SYMBOL ...

Page 4

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1282 (continued +4.5V to +5.5V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER SYMBOL ...

Page 5

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1283 (continued +2.7V to +3.6V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER SYMBOL ...

Page 6

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1283 (continued +2.7V to +3.6V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER SYMBOL ...

Page 7

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference TIMING CHARACTERISTICS—MAX1283 (Figures +2.7V to +3.6V, T DD1 DD2 PARAMETER SYMBOL SCLK Period SCLK Pulse Width High SCLK Pulse Width Low DIN to ...

Page 8

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference (MAX1282 5.0V 6.4MHz; MAX1283: V DD1 DD2 SCLK at REF, 0.01µF capacitor at REFADJ INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE 0.4 0.3 0.2 ...

Page 9

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference (MAX1282 5.0V, f DD1 DD2 SCLK at REF, 0.01µF capacitor at REFADJ, T REFERENCE VOLTAGE vs. TEMPERATURE 2.5002 2.5000 MAX1282 2.4998 MAX1283 2.4996 2.4994 2.4992 2.4990 2.4988 ...

Page 10

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference PIN NAME 1 V Positive Supply Voltage DD1 2–5 CH0–CH3 Sampling Analog Inputs Ground Reference for Analog Inputs. COM sets zero-code voltage in single-ended mode. Must be 6 COM stable to ...

Page 11

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference Detailed Description The MAX1282/MAX1283 ADCs use a successive- approximation conversion technique and input T/H cir- cuitry to convert an analog signal to a 12-bit digital out- put. A flexible serial interface ...

Page 12

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference Table 1. Channel Selection in Single-Ended Mode SEL2 SEL1 SEL0 Table 2. Channel Selection in Pseudo-Differential Mode (SGL/DIF = 0) SEL2 SEL1 0 ...

Page 13

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference conversion result). (See Figure 16 for MAX1282/ MAX1283 QSPI connections.) Simple Software Interface Make sure the CPU’s serial interface runs in master mode so the CPU generates the serial clock. Choose ...

Page 14

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference Table 3. Control-Byte Format BIT 7 BIT 6 BIT 5 (MSB) START SEL2 SEL1 BIT NAME DESCRIPTION The first logic 1 bit after CS goes low defines the beginning of the ...

Page 15

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference CS SCLK 1 4 SEL SEL SEL UNI/ DIN BIP START SSTRB RB1 DOUT IDLE A/D STATE Figure 5. Single-Conversion Timing progress and powers down into the specified ...

Page 16

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference CS t CSS t CSO SCLK DIN t DOE DOUT t STE SSTRB Figure 6. Detailed Serial-Interface Timing Using Fast Power-Down and Reduced-Power Modes FASTPD and REDP ...

Page 17

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference CS DIN S CONTROL BYTE SCLK DOUT SSTRB Figure 7. Continuous 16-Clock/Conversion Timing 1.50 1.25 1.00 0.75 0.50 0.25 0 0.0001 0.001 0.01 0.1 TIME IN SHUTDOWN (s) ...

Page 18

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference To use the direct REF input, disable the internal buffer by connecting REFADJ Using the REFADJ input DD1 makes buffering the external reference unnecessary. Transfer Function Table 5 ...

Page 19

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference +3.3V 24k 510k 100k 0.047µF Figure 12. MAX1282/MAX1283 Reference-Adjust Circuit OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 00 . ...

Page 20

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference SUPPLIES +3V GND *R = 10Ω V GND COM V DD1 DD2 MAX1282 MAX1283 *OPTIONAL Figure 15. Power-Supply Grounding Connection Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values ...

Page 21

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference 10µF 0.1µ DD1 2 CH0 MAX1282 3 CH1 ANALOG MAX1283 INPUTS 4 CH2 5 CH3 V DD1 6 COM SHDN 7 REF 8 4.7µF Figure 16. QSPI Connections XF ...

Page 22

Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference CS SCLK START SEL2 SEL1 SEL0 DIN SSTRB DOUT Figure 18. MAX1282/MAX1283-to-TMS320 Serial Interface Typical Operating Circuit +5V OR +3V CH0 V DD1 0.1µ DD2 +2.5V ANALOG MAX1282 ...

Page 23

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2000 Maxim Integrated Products Package Information PACKAGE OUTLINE, TSSOP 4 ...

Related keywords