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MAX1224 Datasheet

  • MAX1224

  • 1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit...

  • MAXIM   MAXIM

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19-3271; Rev 0; 5/04
1.5Msps, Single-Supply, Low-Power,
True-Differential, 12-Bit ADCs
General Description
The MAX1224/MAX1225 low-power, high-speed, serial-
output, 12-bit, analog-to-digital converters (ADCs) oper-
ate at up to 1.5Msps. 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鈩?QSPI鈩?MICROWIRE鈩?/div>
interface provides the clock necessary for conversion.
These devices easily interface with standard digital signal
processor (DSP) synchronous serial interfaces.
The MAX1224/MAX1225 operate from a single +2.7V to
+3.6V supply voltage and require an external reference.
The MAX1224 has a unipolar analog input, while the
MAX1225 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 1碌A (max), respectively. Also
featured is a separate power-supply input (V
L
), which
allows direct interfacing to +1.8V to V
DD
digital logic. The
fast conversion speed, low-power dissipation, good AC
performance, and DC accuracy (鹵1.5 LSB INL) make the
MAX1224/MAX1225 ideal for industrial process control,
motor control, and base-station applications.
The MAX1224/MAX1225 come in a 12-pin TQFN pack-
age, and are available in the commercial (0擄C to +70擄C)
and extended (-40擄C to +85擄C) temperature ranges.
鈾?/div>
1.5Msps Sampling Rate
鈾?/div>
Only 18mW (typ) Power Dissipation
鈾?/div>
Only 1碌A (max) Shutdown Current
鈾?/div>
High-Speed, SPI-Compatible, 3-Wire Serial Interface
鈾?/div>
69dB S/(N + D) at 525kHz Input Frequency
鈾?/div>
Internal True-Differential Track/Hold (T/H)
鈾?/div>
External Reference
鈾?/div>
No Pipeline Delays
鈾?/div>
Small 12-Pin TQFN Package
Features
MAX1224/MAX1225
Ordering Information
PART
MAX1224CTC-T
MAX1224ETC-T
MAX1225CTC-T
MAX1225ETC-T
TEMP RANGE
0擄C to +70擄C
0擄C to +70擄C
PIN-
PACKAGE
12 TQFN-12
12 TQFN-12
INPUT
Unipolar
Unipolar
Bipolar
Bipolar
-40擄C to +85擄C 12 TQFN-12
-40擄C to +85擄C 12 TQFN-12
Applications
Data Acquisition
Bill Validation
Motor Control
Communications
Portable Instruments
Pin Configuration
TOP VIEW
AIN+
12
N.C.
11
SCLK
10
10碌F
+2.7V TO +3.6V
Typical Operating Circuit
+1.8V TO V
DD
0.01碌F
V
DD
0.01碌F
V
L
DOUT
10碌F
AIN-
REF
RGND
1
2
3
9
8
7
CNVST
DOUT
V
L
DIFFERENTIAL +
INPUT
VOLTAGE -
AIN+
AIN-
MAX1224
MAX1225
MAX1224
MAX1225
REF
4.7碌F
0.01碌F
REF
RGND
碌C/DSP
CNVST
SCLK
4
V
DD
5
N.C.
6
GND
GND
TQFN
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
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.

MAX1224 PDF文件相關型號

MAX1224CTC-T,MAX1225,MAX1225CTC-T,MAX1225ETC-T

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