MAX1348BETX+T Maxim Integrated Products, MAX1348BETX+T Datasheet

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MAX1348BETX+T

Manufacturer Part Number
MAX1348BETX+T
Description
IC ADC/DAC 12BIT W/FIFO 36WQFN
Manufacturer
Maxim Integrated Products
Type
ADC, DACr
Datasheet

Specifications of MAX1348BETX+T

Resolution (bits)
12 b
Sampling Rate (per Second)
225k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Voltage Supply Source
Analog and Digital
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
36-WQFN Exposed Pad, 36-HWQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1340/MAX1342/MAX1346/MAX1348 integrate a
multichannel, 12-bit, analog-to-digital converter (ADC)
and a quad, 12-bit, digital-to-analog converter (DAC) in a
single IC. The devices also include a temperature sensor
and configurable general-purpose I/O ports (GPIOs) with
a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible seri-
al interface. The ADC is available in a 4 or an 8 input-
channel version. The four DAC outputs settle within 2.0µs,
and the ADC has a 225ksps conversion rate.
All devices include an internal reference (4.096V) provid-
ing a well-regulated, low-noise reference for both the
ADC and DAC. Programmable reference modes for the
ADC and DAC allow the use of an internal reference, an
external reference, or a combination of both. Features
such as an internal ±1°C accurate temperature sensor,
FIFO, scan modes, programmable internal or external
clock modes, data averaging, and AutoShutdown™ allow
users to minimize both power consumption and proces-
sor requirements. The low glitch energy (4nV
digital feedthrough (0.5nV
DACs make these devices ideal for digital control of fast-
response closed-loop systems.
The devices are guaranteed to operate with a supply
voltage from +4.75V to +5.25V The devices consume
2.5mA at 225ksps throughput, only 22µA at 1ksps
throughput, and under 0.2µA in the shutdown mode. The
MAX1342/MAX1348 offer four GPIOs that can be config-
ured as inputs or outputs.
The MAX1340/MAX1342/MAX1346/MAX1348 are avail-
able in 36-pin thin QFN packages. All devices are speci-
fied over the -40°C to +85°C temperature range.
19-3332; Rev 3; 3/08
* EP = Exposed pad.
** Number of resolution bits refers to both DAC and ADC.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX1340BETX
MAX1342BETX
MAX1346BETX
MAX1348BETX
PART
Closed-Loop Controls for Optical Components
and Base Stations
System Supervision and Control
Data-Acquisition Systems
12-Bit, Multichannel ADCs/DACs with FIFO,
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
________________________________________________________________ Maxim Integrated Products
General Description
Temperature Sensing, and GPIO Ports
s) of the integrated quad
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
PIN-PACKAGE
Applications
s) and low
VOLTAGE
4.096
4.096
4.096
4.096
REF
(V)
Ordering Information/Selector Guide
VOLTAGE (V)
4.75 to 5.25
4.75 to 5.25
4.75 to 5.25
4.75 to 5.25
♦ 12-Bit, 225ksps ADC
♦ 12-Bit, Quad, 2µs Settling DAC
♦ Internal Reference or External Single-Ended/
♦ Internal ±1°C Accurate Temperature Sensor
♦ On-Chip FIFO Capable of Storing 16 ADC
♦ On-Chip Channel-Scan Mode and Internal
♦ Analog Single-Supply Operation
♦ Digital Supply: 2.7V to AV
♦ 25MHz, SPI/QSPI/MICROWIRE Serial Interface
♦ AutoShutdown Between Conversions
♦ Low-Power ADC
♦ Low-Power DAC: 1.5mA
♦ Evaluation Kit Available (Order MAX1258EVKIT)
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
ANALOG
SUPPLY
Differential Reference
Conversion Results and One Temperature Result
Data-Averaging Features
Analog Multiplexer with True-Differential
8 Single-Ended Channels or 4 Differential
4 Single-Ended Channels or 2 Differential
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
Ultra-Low Glitch Energy (4nV
Power-Up Options from Zero Scale or Full Scale
Excellent Accuracy: ±0.5 LSB INL
Internal Reference Voltage (4.096V)
2.5mA at 225ksps
22µA at 1ksps
0.2µA at Shutdown
+4.75V to +5.25V
Track/Hold (T/H)
Channels (Unipolar or Bipolar)
(MAX1340/MAX1342)
Channels (Unipolar or Bipolar)
(MAX1346/MAX1348)
RESOLUTION
BITS**
12
12
12
12
CHANNELS
ADC
DD
8
8
4
4
s)
CHANNELS
DAC
Features
4
4
4
4
GPIOs
0
4
0
4
1

Related parts for MAX1348BETX+T

MAX1348BETX+T Summary of contents

Page 1

... Low-Power DAC: 1.5mA ♦ Evaluation Kit Available (Order MAX1258EVKIT) SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. Ordering Information/Selector Guide REF ANALOG ...

Page 2

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V DD DGND to AGND.....................................................-0.3V to +0. .......................................................-3.0V to +0. Digital Inputs to DGND.............................................-0.3V to +6V Digital ...

Page 3

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 4.75V to 5.25V, external reference otherwise noted. Typical values are at AV PARAMETER SYMBOL Acquisition Time t ACQ Conversion Time ...

Page 4

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 4.75V to 5.25V, external reference otherwise noted. Typical values are at AV PARAMETER SYMBOL DC ACCURACY (Note 10) Resolution Integral ...

Page 5

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 4.75V to 5.25V, external reference otherwise noted. Typical values are at AV PARAMETER SYMBOL INTERNAL REFERENCE REF1 Output Voltage REF1 ...

Page 6

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 4.75V to 5.25V, external reference otherwise noted. Typical values are at AV PARAMETER SYMBOL POWER REQUIREMENTS (Note 15) Digital Positive-Supply ...

Page 7

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 4.75V to 5.25V, external reference otherwise noted. Typical values are at AV PARAMETER SYMBOL CS or CNVST Rise to EOC ...

Page 8

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( 5V, external V = 4.096V REF at REF +25°C, unless otherwise noted.) A ANALOG SHUTDOWN CURRENT vs. ANALOG SUPPLY VOLTAGE 0.5 ...

Page 9

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( 5V, external V = 4.096V REF at REF +25°C, unless otherwise noted.) A ANALOG SUPPLY CURRENT vs. SAMPLING RATE 3.0 2.5 ...

Page 10

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( 5V, external V = 4.096V REF at REF +25°C, unless otherwise noted.) A INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE 4.12 4.11 4.10 ...

Page 11

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( 5V, external V = 4.096V REF at REF +25°C, unless otherwise noted.) A TEMPERATURE SENSOR ERROR vs. TEMPERATURE 1.00 0.75 0.50 ...

Page 12

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports MAX1340 MAX1342 MAX1346 1, 2, 16–19 16–19, 16–19 24, 25, 31, 24 ...

Page 13

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports MAX1340 MAX1342 MAX1346 27–31, 34 27–31, 34 — — — — — — 24, 25 — — — 27–30 — — ...

Page 14

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Detailed Description The MAX1340/MAX1342/MAX1346/MAX1348 integrate a multichannel 12-bit ADC, and a quad 12-bit DAC in a single IC. The devices also include a temperature sen- sor and configurable GPIOs with ...

Page 15

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports GPIOC0, GPIOA0, GPIOA1 GPIOC1 GPIO USER-PROGRAMMABLE I/O CONTROL OSCILLATOR SCLK CS DIN PORT DOUT TEMPERATURE SENSOR EOC LOGIC CONTROL CNVST AIN0 12-BIT FIFO AND SAR T/H ALU AIN5 ADC REF2/ ...

Page 16

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 1. Command Byte (MSB First) REGISTER NAME BIT 7 Conversion* 1 Setup 0 ADC Averaging 0 DAC Select 0 Reset 0 GPIO Configure** 0 GPIO Write** 0 GPIO Read** ...

Page 17

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports the setup register. See Figures 3 and 4 for the transfer- function graphs. Program a pair of analog inputs for dif- ferential operation by writing a one to the appropriate ...

Page 18

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports In addition to the 12-bit ADC, the MAX1340/MAX1342/ MAX1346/MAX1348 also include four voltage-output, 12-bit, monotonic DACs with less than 4 LSB integral nonlinearity error and less than 1 LSB differential ...

Page 19

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports The GPIOs can sink and source current. The MAX1342/MAX1348 GPIOA0 and GPIOA1 can sink and source up to 15mA. GPIOC0 and GPIOC1 can sink 4mA and source 2mA. See Table ...

Page 20

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports A conversion is not performed requested on a channel or one of the channel pairs that has been con- figured as CNVST or REF2. For channels configured ...

Page 21

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 5. Setup Register* BIT NAME BIT — 7 (MSB) — 6 CKSEL1 5 CKSEL0 4 REFSEL1 3 REFSEL0 2 DIFFSEL1 1 DIFFSEL0 0 (LSB) * See below for bit ...

Page 22

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 5c. Clock Mode 11 VOLTAGE REFSEL1 REFSEL0 REFERENCE Internal (DAC 0 0 and ADC) External single- ended (REF1 0 1 for DAC and REF2 for ADC) Internal (ADC) 1 ...

Page 23

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 6. Unipolar-Mode Register (Addressed Through the Setup Register) BIT NAME BIT UCH0/1 7 (MSB) Configure AIN0 and AIN1 for unipolar differential conversion. UCH2/3 6 Configure AIN2 and AIN3 for ...

Page 24

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Unipolar/Bipolar Registers The final 2 bits (LSBs) of the setup register control the unipolar-/bipolar-mode address registers. Set DIFFSEL[1: write to the unipolar-mode regis- ter. Set bits DIFFSEL[1:0] ...

Page 25

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 9 details the four scan modes available in the ADC conversion register. All four scan modes allow averaging as long as the AVGON bit, bit 4 in the averaging ...

Page 26

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports byte load data from DIN to the GPIO configuration reg- ister in the MAX1342/MAX1348. See Tables 13 and 14. The register bits are updated after the last CS rising edge. ...

Page 27

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 17. DAC Serial-Interface Configuration 16-BIT SERIAL WORD MSB CONTROL BITS D11 D10 ...

Page 28

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 18. DAC Power-Up and Power-Down Commands CONTROL DATA BITS BITS — — — ...

Page 29

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Partial Reads and Partial Writes If the first byte of an entry in the FIFO is partially read (CS is pulled high after fewer than eight SCLK cycles), the remaining ...

Page 30

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports CNVST CS SCLK DOUT EOC Figure 6. Clock Mode 00—After writing a command byte, set CNVST low for at least 40ns to begin a conversion. t CSW CNVST (ACQUISITION 1) ...

Page 31

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports DIN CS SCLK DOUT t DOV EOC Figure 8. Clock Mode 10—The command byte to the conversion register begins the acquisition (CNVST is not required). and averaging registers to correctly ...

Page 32

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports DIN (ACQUISITION1) CS SCLK DOUT EOC X = DON'T CARE. Figure 9. Clock Mode 11—Externally Timed Acquisition, Sampling, and Conversion without CNVST Externally Clocked Acquisitions and Conversions Using the Serial ...

Page 33

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports SCLK DIN D15 D14 t DOE D15 DOUT D7 t CSS t CSPWH CS Figure 10. DAC/GPIO Serial-Interface Timing (Clock Modes 00, 01, and ...

Page 34

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports SCLK D15 DIN t DOE D15 DOUT D7 t CSS t CSPWH CS Figure 11. DAC/GPIO Serial-Interface Timing (Clock Mode 11) SCLK 1 2 ...

Page 35

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports CS t GSU GPIO INPUT/OUTPUT Figure 13. GPIO Timing LDAC OUT_ Figure 14. LDAC Functionality Drive LDAC low to transfer the content of the input reg- isters to the DAC ...

Page 36

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Unipolar ADC Offset Error For an ideal converter, the first transition occurs at 0.5 LSB, above zero. Offset error is the amount of deviation between the measured first transition point ...

Page 37

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Full-Power Bandwidth A large -0.5dBFS analog input signal is applied to an ADC, and the input frequency is swept up to the point where the amplitude of the digitized conversion ...

Page 38

Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports TOP VIEW D.C. 1 D.C. 2 EOC DGND 5 MAX1340 DOUT 6 SCLK 7 DIN 8 OUT0 ...

Page 39

... 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 ____________________ 39 © 2008 Maxim Integrated Products ...

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