Description

The MAX308/MAX309 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100Ω), which is matched to within 5Ω between channels and remains flat over the specified analog signal range (7Ω max). They also offer low leakage over temperature (NO-off leakage current less than 5nA at +85°C) and fast switching speeds (transition time less than 250ns). The MAX308 is a single-ended 1-of-8 device, and the MAX309 is a differential 2-of-4 device. These muxes operate with a single +5V to +30V supply or bipolar ±5V to ±20V supplies, while retaining TTL/CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. These improved parts are plug-in upgrades for the industry standard DG408, DG409, DG508A, and DG509A.

Specifications and features

♦ Guaranteed On-Resistance Match Between Channels, <5Ω Max
♦ Low On-Resistance, <100Ω Max
♦ Guaranteed Flat On-Resistance over Specified Signal Range, 7Ω Max
♦ Guaranteed Low Charge Injection, <10pC
♦ NO-Off Leakage Current <5nA at +85°C
♦ COM-Off Leakage Current <20nA at +85°C
♦ ESD Protection >2000V
♦ Plug-In Upgrade for Industry-Standard DG408/DG409/DG508A/DG509A
♦ Single-Supply Operation (+4.5V to +30V)
♦ Bipolar-Supply Operation (±4.5V to ±20V)
♦ Low Power Consumption, <300µW
♦ Rail-to-Rail Signal Handling
♦ TTL/CMOS-Logic Compatible

Application Scenarios

Sample-and-Hold Circuits
Automatic Test Equipment
Heads-Up Displays
Guidance and Control Systems
Military Radios
Communications Systems
Battery-Operated Systems
PBX, PABX
Audio Signal Routing

Comparison

Advantages:
1. Low on-resistance, ensuring high performance.
2. Guaranteed on-resistance match between channels.
3. Flat on-resistance over specified signal range.
4. Low leakage over temperature.
5. Fast switching speeds.
6. Plug-in upgrade for industry-standard models.
7. Single-supply or bipolar-supply operation.
8. Low power consumption.
9. Rail-to-rail signal handling.
10. TTL/CMOS-logic compatible.

Disadvantages:
None mentioned.