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MAX1144 Datasheet

  • MAX1144

  • "14-Bit ADCs, 150ksps, 3.3V Single Supply"

  • Maxim   Maxim

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19-2465; Rev 0; 4/02
14-Bit ADCs, 150ksps, 3.3V Single Supply
General Description
The MAX1144/MAX1145 are 150ksps, 14-bit ADCs.
These serially interfaced ADCs connect directly to
SPI鈩? QSPI鈩? and MICROWIRE鈩?devices without
external logic. They combine an input scaling network,
internal track/hold, clock, and three general-purpose
digital output pins (for external multiplexer or PGA con-
trol) in a 20-pin SSOP package. The excellent dynamic
performance (THD
鈮?/div>
90dB), high speed (150ksps in
bipolar mode), and low power (8.0mA) of these ADCs
make them ideal for applications such as industrial
process control, instrumentation, and medical applica-
tions.
The MAX1144 accepts input signals of 0 to +6V (unipo-
lar) or 鹵6V (bipolar), while the MAX1145 accepts input
signals of 0 to +2.048V (unipolar) or 鹵2.048V (bipolar).
Operating from a single 3.135V to 3.465V analog digital
supply, powerdown modes reduce current consump-
tion to 0.15mA at 10ksps and further reduce supply
current to less than 20碌A(chǔ) slower data rates.
A serial strobe output (SSTRB) allows direct connection
to the TMS320 family digital-signal processors. The
MAX1144/MAX1145 user can select either the internal
clock or an external serial-interface clock for the ADC to
perform analog-to-digital conversions.
The MAX1144/MAX1145 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 PGA.
The MAX1144/MAX1145 are available in a 20-pin SSOP
package and are fully specified over the -40擄C to
+85擄C temperature range.
Features
o
150ksps (Bipolar) and 125ksps (Unipolar)
Sampling ADC
o
14 Bits, No Missing Codes
o
1LSB INL Guaranteed
o
-100dB THD
o
3.3V Single-Supply Operation
o
Low-Power Operation
5mA typ (Unipolar Mode)
o
1.2碌A(chǔ) Shutdown Mode
o
Software-Configurable Unipolar and Bipolar Input
Ranges
0 to +6V and 鹵6V (MAX1144)
0 to +2.048V and 鹵2.048V (MAX1145)
o
Internal or External Clock
o
SPI/QSPI/MICROWIRE TMS320-Compatible Serial
Interface
o
Three User-Programmable Logic Outputs
o
Small 20-Pin SSOP Package
MAX1144/MAX1145
Ordering Information
PART
MAX1144ACAP
MAX1144BCAP
MAX1144AEAP
MAX1144BEAP
TEMP
RANGE
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
20 SSOP
20 SSOP
20 SSOP
20 SSOP
INL
(LSB)
鹵1
鹵2
鹵1
鹵2
Ordering Information continued at end of data sheet.
Applications
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered Equipment
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
TOP VIEW
REF 1
AV
DD
2
AGND 3
AV
DD
4
DGND 5
SHDN 6
P2 7
P1 8
PO 9
Pin Configuration
20 AIN
19 AGND
18 CREF
17 CS
MAX1144
MAX1145
16 DIN
15 DV
DD
14 DGND
13 SCLK
12 RST
11 DOUT
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
SSTRB 10
SSOP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX1144 PDF文件相關(guān)型號(hào)

MAX1144BEAP,MAX1145,MAX1145ACAP,MAX1145AEAP,MAX1145BEAP

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