MAX1274CTC

Manufacturer Part NumberMAX1274CTC
DescriptionAnalog to Digital Converters - ADC
ManufacturerMaxim Integrated
MAX1274CTC datasheet
 


Specifications of MAX1274CTC

Number Of Channels1ArchitectureSAR
Conversion Rate1800 KSPsResolution12 bit
Input TypeDifferentialSnr70 dB
Interface TypeQSPI, Serial (SPI, Microwire)Operating Supply Voltage4.75 V to 5.25 V
Maximum Power Dissipation1349 mWNumber Of Converters1
Voltage Reference5.25 V  
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19-3158; Rev 1; 4/09
1.8Msps, Single-Supply, Low-Power,
General Description
The MAX1274/MAX1275 low-power, high-speed, serial-
output, 12-bit, analog-to-digital converters (ADCs) oper-
ate at up to 1.8Msps. These devices feature true-differen-
tial inputs, offering better noise immunity, distortion
improvements, and a wider dynamic range over single-
ended inputs. A standard SPI™/QSPI™/MICROWIRE™
interface provides the clock necessary for conversion.
These devices easily interface with standard digital signal
processor (DSP) synchronous serial interfaces.
The MAX1274/MAX1275 operate from a single +4.75V to
+5.25V supply voltage and require an external reference.
The MAX1274 has a unipolar analog input, while the
MAX1275 has a bipolar analog input. These devices fea-
ture a partial power-down mode and a full power-down
mode for use between conversions, which lower the sup-
ply current to 1mA (typ) and 1µA (max), respectively. Also
featured is a separate power-supply input (V
allows direct interfacing to +1.8V to V
fast conversion speed, low-power dissipation, excellent
AC performance, and DC accuracy (±1 LSB INL) make
the MAX1274/MAX1275 ideal for industrial process con-
trol, motor control, and base-station applications.
The MAX1274/MAX1275 come in a 12-pin TQFN pack-
age, and are available in the extended (-40°C to +85°C)
temperature range.
Data Acquisition
Communications
Bill Validation
Portable Instruments
Motor Control
Pin Configuration
TOP VIEW
AIN+
N.C.
SCLK
12
11
10
AIN-
1
REF
2
MAX1274
MAX1275
RGND
3
4
5
6
V
N.C.
GND
DD
TQFN
SPI/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 Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
True-Differential, 12-Bit ADCs
♦ 1.8Msps Sampling Rate
♦ Only 45mW (typ) Power Dissipation
♦ Only 1µA (max) Shutdown Current
♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface
♦ 70dB S/(N + D) at 525kHz Input Frequency
♦ Internal True-Differential Track/Hold (T/H)
♦ External Reference
♦ No Pipeline Delays
♦ Small 12-Pin TQFN Package
), which
L
digital logic. The
DD
PART
MAX1274AETC+T
MAX1274BETC+T
Applications
MAX1275AETC+T
MAX1275BETC+T
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
+4.75V TO +5.25V
10μF
9
CNVST
DIFFERENTIAL
8
DOUT
VOLTAGE
7
V
L
REF
4.7μF
Features
Ordering Information
PIN-
TEMP RANGE
PACKAGE
-40°C to +85°C 12 TQFN
-40°C to +85°C 12 TQFN
-40°C to +85°C 12 TQFN
-40°C to +85°C 12 TQFN
Typical Operating Circuit
+1.8V TO V
DD
0.01μF
0.01μF
V
V
DD
L
+
DOUT
AIN+
INPUT
-
AIN-
MAX1274
MAX1275
CNVST
SCLK
REF
RGND
GND
0.01μF
INPUT
Unipolar
Unipolar
Bipolar
Bipolar
10μF
μC/DSP
1