MAX122ACAG Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
Список матч
MAX122ACAG Datasheet PDF : 15 Pages
| |||
MAX120/MAX122
500ksps, 12-Bit ADCs with Track/Hold
and Reference
General Description
The MAX120/MAX122 complete, BiCMOS, sampling 12-bit
analog-to-digital converters (ADCs) combine an on-chip
track/hold (T/H) and a low-drift voltage reference with fast
conversion speeds and low-power consumption. The T/H’s
350ns acquisition time combined with the MAX120’s 1.6µs
conversion time results in throughput rates as high as 500k
samples per second (ksps). Throughput rates of 333ksps
are possible with the 2.6µs conversion time of the MAX122.
The MAX120/MAX122 accept analog input voltages from
-5V to +5V. The only external components needed are
decoupling capacitors for the power-supply and refer-
ence voltages. The MAX120 operates with clocks in the
0.1MHz to 8MHz frequency range. The MAX122 accepts
0.1MHz to 5MHz clock frequencies.
The MAX120/MAX122 employ a standard microprocessor
(µP) interface. Three-state data outputs are configured
to operate with 12-bit data buses. Data-access and bus-
release timing specifications are compatible with most
popular µPs without resorting to wait states. In addition,
the MAX120/MAX122 can interface directly to a first-in,
first-out (FIFO) buffer, virtually eliminating µP interrupt
overhead. All logic inputs and outputs are TTL/CMOS
compatible. For applications requiring a serial interface,
refer to the MAX121.
Applications
●● Digital-Signal Processing
●● Audio and Telecom Processing
●● Speech Recognition and Synthesis
●● High-Speed Data Acquisition
●● Spectrum Analysis
●● Data Logging Systems
Pin Configuration
TOP VIEW
1
2
3
4
5
6
+
MODE
RD 24
MAX120
VSS MAX122 CS 23
VDD
INT/BUSY 22
AIN
CLKIN 21
VREF
CONVST 20
AGND
D0 19
7 D11
D1 18
8 D10
D2 17
9 D9
D3 16
10 D8
D4 15
11 D7
D5 14
12 DGND
D6 13
PDIP/SO/SSOP
Features
●● 12-Bit Resolution
●● No Missing Codes Over Temperature
●● 20ppm/°C -5V Internal Reference
●● 1.6µs Conversion Time/500ksps Throughput
(MAX120)
●● 2.6µs Conversion Time/333ksps Throughput
(MAX122)
●● Low Noise and Distortion:
• 70dB (min) SINAD
• -77dB (max) THD (MAX122)
●● Low Power Dissipation: 210mW
●● Separate Track/Hold Control Input
●● Continuous-Conversion Mode Available
●● ±5V Input Range, Overvoltage Tolerant to ±15V
●● 24-Pin Narrow DIP, Wide SO, and SSOP Packages
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX120CNG+
MAX120CWG+
MAX120CAG+
MAX120ENG+
MAX120EWG+
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
24 PDIP
24 Wide SO
24 SSOP
24 PDIP
24 Wide SO
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagram
INL
(LSB)
±1
±1
±1
±1
±1
19-0030; Rev 1; 3/12
Share Link: 