19-1857; Rev 0; 11/00
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
General Description
The MAX1117/MAX1118/MAX1119 low-power, 8-bit,
dual-channel, analog-to-digital converters (ADCs) fea-
ture an internal track/hold (T/H) voltage reference
(MAX1117/MAX1119), clock, and serial interface. The
MAX1118 is specified from +2.7V to +5.5V and con-
sumes only 135碌A(chǔ) at 100ksps. The MAX1117 is speci-
fied from +2.7V to +3.6V, and the MAX1119 is specified
from +4.5V to +5.5V, each consumes only 175碌A(chǔ) at
100ksps.
The full-scale analog input range is determined by the
internal reference of +2.048V (MAX1117) or +4.096V
(MAX1119), or by an externally applied reference rang-
ing from +1V to V
DD
(MAX1118). All devices feature an
automatic shutdown mode that reduces supply current
to <1碌A(chǔ) when the device is not in use. The 3-wire serial
interface directly connects to SPI鈩? QSPI鈩? and
MICROWIRE鈩?devices without external logic.
Conversions up to 100ksps are performed using an
internal clock.
The MAX1117/MAX1118/MAX1119 are available in an
8-pin SOT23 package with a footprint that is only 11%
of an 8-pin plastic DIP.
o
Single Supply
+2.7V to +3.6V (MAX1117)
+2.7V to +5.5V (MAX1118)
+4.5V to +5.5V (MAX1119)
o
Internal Track/Hold: 100kHz Sampling Rate
o
Internal Reference
+2.048V (MAX1117)
+4.096V (MAX1119)
o
Reference Input Range: 0 to V
DD
(MAX1118)
o
SPI/QSPI/MICROWIRE-Compatible Serial Interface
o
Small 8-Pin SOT23 Package
o
Automatic Power-Down
o
Analog Input Range: 0 to V
REF
o
Low Power
175碌A(chǔ) at 100ksps (typ) (MAX1117/MAX1119)
135碌A(chǔ) at 100ksps (typ) (MAX1118)
18碌A(chǔ) at 10ksps (typ)
1碌A(chǔ) (typ) in Power-Down Mode
Features
MAX1117/MAX1118/MAX1119
________________________Applications
Low-Power, Handheld Portable Devices
System Diagnostics
Battery-Powered Test Equipment
Solar-Powered Remote Systems
Receive Signal Strength Indicators
4mA to 20mA Powered Remote Data Acquisition
Systems
PART
MA X1 11 7
EKA
MA X1 11 8
EKA
MA X1 11 9
EKA
Ordering Information
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
8 SOT23
8 SOT23
8 SOT23
TOP
MARK
AADW
AADX
AADY
Pin Configuration
TOP VIEW
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
V
DD
1
CHO
CH1
GND
2
3
4
8
7
SCLK
DOUT
CNVST
(REF) I.C
MAX1117
MAX1118
MAX1119
SOT23
6
5
Functional Diagram appears at end of data sheet.
( ) ARE FOR MAX1118 ONLY
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.