MAX1275

Manufacturer Part NumberMAX1275
Description(MAX1274 / MAX1275) 12-Bit ADCs
ManufacturerMaxim Integrated Products
MAX1275 datasheet
 


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19-3158; Rev 0; 1/04
www.DataSheet4U.com
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 commercial (0°C to +70°C)
and extended (-40°C to +85°C) temperature ranges.
Data Acquisition
Bill Validation
Motor Control
Pin Configuration
TOP VIEW
AIN+
N.C.
12
11
AIN-
1
REF
2
MAX1274
MAX1275
RGND
3
4
5
V
N.C.
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/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1.8Msps, Single-Supply, Low-Power,
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
MAX1274ACTC-T
MAX1274BCTC-T
MAX1274AETC-T
MAX1274BETC-T
MAX1275ACTC-T
MAX1275BCTC-T
Applications
MAX1275AETC-T
Communications
MAX1275BETC-T
Portable Instruments
SCLK
4.75V TO +5.25V
10
9
CNVST
8
DOUT
7
V
L
6
REF
GND
Ordering Information
PIN-
PART
TEMP RANGE
PACKAGE
0°C to +70°C
12 TQFN-12
0°C to +70°C
12 TQFN-12
-40°C to +85°C 12 TQFN-12
-40°C to +85°C 12 TQFN-12
0°C to +70°C
12 TQFN-12
0°C to +70°C
12 TQFN-12
-40°C to +85°C 12 TQFN-12
-40°C to +85°C 12 TQFN-12
Typical Operating Circuit
+1.8V TO V
DD
0.01µF
10µF
0.01µF
V
V
DD
L
DIFFERENTIAL
+
AIN+
DOUT
INPUT
-
AIN-
VOLTAGE
MAX1274
MAX1275
CNVST
SCLK
REF
RGND
GND
4.7µF
0.01µF
Features
INPUT
Unipolar
Unipolar
Unipolar
Unipolar
Bipolar
Bipolar
Bipolar
Bipolar
10µF
µC/DSP
1