Rainbow Electronics MAX118 - Manual

_______________General Description
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.
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.
________________________Applications
High-Speed DSP Remote Data Acquisition
Portable Equipment Communications Systems
____________________________Features
♦ Single +5V Supply Operation
♦ 4 (MAX114) or 8 (MAX118) Analog Input Channels
♦ Low Power: 40mW (operating mode)
5µW (power-down mode)
♦ Total Unadjusted Error
≤
1LSB
♦ Fast Conversion Time: 660ns per Channel
♦ No External Clock Required
♦ Internal Track/Hold
♦ 1MHz Full-Power Bandwidth
♦ Internally Connected 8th Channel Monitors
Reference Voltage (MAX118)
MAX114/MAX118
+5V, 1Msps, 4 & 8-Channel,
8-Bit ADCs with 1µA Power-Down
________________________________________________________________ Maxim Integrated Products 1
4-BIT
DAC
4-BIT
FLASH
ADC
(4MSBs)
4-BIT
FLASH
ADC
(4LSBs)
TIMING AND
CONTROL
ADDRESS
LATCH
DECODE
REF+
16
THREE-
STATE
OUTPUT
DRIVERS
D7
D6
D5
D4
D3
D2
D1
D0
MUX
*IN7
*IN8
Σ
REF+
*IN6
*IN5
IN4
IN3
IN2
IN1
A0 A1 A2 REF- PWRDN RD
MODE INT WR/RDY
CS
MAX114/MAX118
* MAX118 ONLY
_________________________________________________________Functional Diagram
19-1083; Rev 1; 8/96
PART
MAX114 CNG
MAX114CAG
MAX114C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
______________Ordering Information
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX114ENG
MAX114EAG
MAX114MRG -55°C to +125°C
-40°C to +85°C
-40°C to +85°C 24 Narrow Plastic DIP
24 SSOP
24 Narrow CERDIP**
Ordering Information continued on last page.
*Dice are specified at T A = +25°C, DC parameters only.
**Contact factory for availability.
Pin Configurations appear on last page.