MAX114 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1μA Power-Down

19-1083; Rev 1; 8/96
+5V, 1Msps, 4 & 8-Channel,
8-Bit ADCs with 1µA Power-Down
_______________General Description ____________________________Features
The MAX114/MAX118 are microprocessor-compatible,
8-bit, 4-channel and 8-channel analog-to-digital con-
verters (ADCs). They operate from a single +5V supply
and use a half-flash technique to achieve a 660ns con-
version time (1Msps). A power-down (PWRDN) pin
reduces current consumption typically to 1µA. The
devices return from power-down mode to normal oper-
ating mode in less than 200ns, allowing large supply-
current reductions in burst-mode applications (in burst
mode, the ADC wakes up from a low-power state at
specified intervals to sample the analog input signals).
Both converters include a track/hold, enabling the ADC
to digitize fast analog signals.
Microprocessor (µP) interfaces are simplified because the
ADC can appear as a memory location or I/O port without
external interface logic. The data outputs use latched,
three-state buffer circuitry for direct connection to an 8-bit
parallel µP data bus or system input port. The
MAX114/MAX118 input/reference configuration enables
ratiometric operation.
o Single +5V Supply Operation
o 4 (MAX114) or 8 (MAX118) Analog Input Channels
o Low Power: 40mW (operating mode)
5µW (power-down mode)
o Total Unadjusted Error ≤1LSB
o Fast Conversion Time: 660ns per Channel
o No External Clock Required
o Internal Track/Hold
o 1MHz Full-Power Bandwidth
o Internally Connected 8th Channel Monitors
Reference Voltage (MAX118)
______________Ordering Information
PART
MAX114CNG
MAX114CAG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
The 4-channel MAX114 is available in a 24-pin DIP or
SSOP. The 8-channel MAX118 is available in a 28-pin
DIP or SSOP. For +3V applications, refer to the
MAX113/MAX117 data sheet.
MAX114C/D
MAX114ENG
MAX114EAG
MAX114MRG
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
Dice*
24 Narrow Plastic DIP
24 SSOP
24 Narrow CERDIP**
________________________Applications ^{Ordering Information continued on last page.}
High-Speed DSP
Remote Data Acquisition
*Dice are specified at TA = +25°C, DC parameters only.
**Contact factory for availability.
Portable Equipment Communications Systems
Pin Configurations appear on last page.
_________________________________________________________Functional Diagram
REF+
*IN8
*IN7
*IN6
*IN5
IN4
MUX
IN3
Σ
IN2
IN1
* MAX118 ONLY
ADDRESS
LATCH
DECODE
A0 A1 A2
4-BIT
D7
FLASH
D6
ADC
D5
(4MSBs)
D4
4-BIT
DAC
REF+
16
4-BIT
FLASH
ADC
(4LSBs)
THREE-
STATE
OUTPUT
DRIVERS
D3
D2
D1
D0
TIMING AND
CONTROL
MAX114/MAX118
REF- _PWRDN RD
CS
MODE INT WR/RDY
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