MAX113 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +3V, 400ksps, 4/8-Channel, 8-Bit ADCs with 1UA Power-Down

19-1081; Rev 1; 8/96
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
_______________General Description ____________________________Features
The MAX113/MAX117 are microprocessor-compatible,
8-bit, 4-channel and 8-channel analog-to-digital con-
verters (ADCs). They operate from a single +3V supply
and use a half-flash technique to achieve a 1.8µs con-
version time (400ksps). A power-down pin (PWRDN)
reduces current consumption to 1µA typical. The
devices return from power-down mode to normal oper-
ating mode in less than 900ns, 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.
o +3.0V to +3.6V Single-Supply Operation
o 4 (MAX113) or 8 (MAX117) Analog Input Channels
o Low Power: 1.5mA (operating mode)
1µA (power-down mode)
o Total Unadjusted Error ≤ 1LSB
o Fast Conversion Time: 1.8µs per Channel
o No External Clock Required
o Internal Track/Hold
o Ratiometric Reference Inputs
o Internally Connected 8th Channel Monitors
Reference Voltage (MAX117)
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 MAX113/MAX117 input/reference configuration
enables ratiometric operation.
The 4-channel MAX113 is available in a 24-pin DIP or
SSOP. The 8-channel MAX117 is available in a 28-pin
DIP or SSOP. For +5V applications, refer to the
MAX114/MAX118 data sheet.
______________Ordering Information
PART
MAX113CNG
MAX113CAG
MAX113C/D
MAX113ENG
MAX113EAG
MAX113MRG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
24 Narrow Plastic DIP
24 SSOP
24 Narrow CERDIP**
________________________Applications
Battery-Powered Systems Portable Equipment
Ordering Information continued at end of data sheet.
*Dice are specified at T_A = +25°C, DC parameters only.
**Contact factory for availability.
System-Health Monitoring Remote Data Acquisition
Communications Systems
Pin Configuration appears at end of data sheet.
_________________________________________________________Functional Diagram
REF+
*IN8
*IN7
*IN6
*IN5
IN4
MUX
IN3
Σ
IN2
IN1
*MAX117 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
MAX113/MAX117
REF- PWRDN RD
CS
MODE INT WR/RDY
________________________________________________________________ Maxim Integrated Products 1
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