MAX1278 Maxim Integrated Products, MAX1278 Datasheet

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MAX1278

Manufacturer Part Number
MAX1278
Description
(MAX1276 / MAX1278) 12-Bit ADCs
Manufacturer
Maxim Integrated Products
Datasheet

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MAX1278ETC+
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The MAX1276/MAX1278 are low-power, high-speed, seri-
al-output, 12-bit, analog-to-digital converters (ADCs) that
operate at up to 1.8Msps and have an internal reference.
These devices feature true-differential inputs, offering bet-
ter 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 MAX1276/MAX1278 operate from a single +4.75V to
+5.25V supply voltage. The MAX1276/MAX1278 include
a 4.096V internal reference. The MAX1276 has a unipolar
analog input, while the MAX1278 has a bipolar analog
input. These devices feature a partial power-down mode
and a full power-down mode for use between conver-
sions, which lower the supply current to 2mA (typ) and
1µA (max), respectively. Also featured is a separate
power-supply input (V
+1.8V to V
low-power dissipation, excellent AC performance, and DC
accuracy (±1.25 LSB INL) make the MAX1276/MAX1278
ideal for industrial process control, motor control, and
base-station applications.
The MAX1276/MAX1278 come in a 12-pin TQFN pack-
age, and are available in the commercial (0°C to +70°C)
and extended (-40°C to +85°C) temperature ranges.
19-3364; Rev 0; 8/04
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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.
Differential, 12-Bit ADCs with Internal Reference
TOP VIEW
Data Acquisition
Bill Validation
Motor Control
DD
RGND
AIN-
REF
digital logic. The fast conversion speed,
1
2
3
________________________________________________________________ Maxim Integrated Products
1.8Msps, Single-Supply, Low-Power, True-
L
AIN+
V
), which allows direct interfacing to
12
4
DD
General Description
MAX1276
MAX1278
TQFN
N.C.
N.C.
11
5
Pin Configuration
Communications
Portable Instruments
SCLK
GND
10
6
Applications
9
8
7
CNVST
DOUT
V
L
♦ 1.8Msps Sampling Rate
♦ Only 55mW (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)
♦ Internal 4.096V Reference
♦ No Pipeline Delays
♦ Small 12-Pin TQFN Package
MAX1276CTC-T
MAX1276ETC-T
MAX1278CTC-T
MAX1278ETC-T
4.75V TO +5.25V
4.7µF
DIFFERENTIAL
10µF
PART
VOLTAGE
INPUT
0.01µF
+
-
Typical Operating Circuit
0.01µF
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
AIN+
AIN-
REF
RGND
Ordering Information
V
DD
MAX1276
MAX1278
+1.8V TO V
GND
V
CNVST
L
PIN-
PACKAGE
12 TQFN-12
12 TQFN-12
12 TQFN-12
12 TQFN-12
DOUT
0.01µF
SCLK
DD
Features
10µF
Unipolar
Unipolar
µC/DSP
Bipolar
Bipolar
INPUT
1

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