Datasheet MAX317, MAX318, MAX319 (Maxim) - 6
| 制造商 | Maxim |
| 描述 | Precision, CMOS Analog Switches |
| 页数 / 页 | 12 / 6 — Precision, CMOS Analog Switches. … |
| 文件格式/大小 | PDF / 134 Kb |
| 文件语言 | 英语 |
Precision, CMOS Analog Switches. _______________________________________________________________________Pin Description
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文件文字版本
Precision, CMOS Analog Switches _______________________________________________________________________Pin Description PIN NAME FUNCTION MAX317 MAX318 MAX319
1 1 1 COM Analog-switch common terminal 2 2 — N.C. No connect — not internally connected — — 8 NO Analog-switch normally open terminal 3 3 3 GND Logic ground 4 4 4 V+ Analog-signal positive supply input 5 5 5 VL Logic-level positive supply input 6 6 6 IN Logic-level input 7 7 7 V- Analog-signal negative supply input 8 — 2 NC Analog-switch normally closed terminal — 8 — NO Analog-switch normally open terminal
MAX317/MAX318/MAX319 __________Applications Information
adding two small signal diodes in series with the sup- ply pins (Figure 1). Adding the diodes reduces the
Operation with Supply Voltages
analog signal range to 1V below V+ and 1V below V-,
Other Than ±15V
but low switch resistance and low leakage characteris- The main limitation of supply voltages other than ±15V tics are unaffected. Device operation is unchanged, is analog signal range reduction. The MAX317/ and the difference between V+ to V- should not exceed MAX318/MAX319 switches operate with bipolar sup- +44V. plies of ±5V to ±20V. Typical Operating Characteristics graphs show typical on resistance for ±15V, ±10V, and V+ ±5V supplies. Switching times increase by a factor of two or more for operation at ±5V. The MAX317/MAX318/MAX319 can operate from unipolar supplies of +10V to +30V. Both parts can also operate V+ from unbalanced supplies such as +24V and -5V. Connect V- to 0V when operating with a single supply. NO_ This means that VL must be connected to +5V to be COM_ TTL compatible, or to V+ for CMOS logic input levels.
Overvoltage Protection
Vg V- Proper power-supply sequencing is recommended for all CMOS devices. It is important not to exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the V- devices. Always sequence V+ on first, followed by VL, V-, and logic inputs. If power-supply sequencing is not Figure 1. Overvoltage Protection Using Blocking Diodes possible, protect the devices from overvoltage by
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1 1 1 COM Analog-switch common terminal 2 2 — N.C. No connect — not internally connected — — 8 NO Analog-switch normally open terminal 3 3 3 GND Logic ground 4 4 4 V+ Analog-signal positive supply input 5 5 5 VL Logic-level positive supply input 6 6 6 IN Logic-level input 7 7 7 V- Analog-signal negative supply input 8 — 2 NC Analog-switch normally closed terminal — 8 — NO Analog-switch normally open terminal
MAX317/MAX318/MAX319 __________Applications Information
adding two small signal diodes in series with the sup- ply pins (Figure 1). Adding the diodes reduces the
Operation with Supply Voltages
analog signal range to 1V below V+ and 1V below V-,
Other Than ±15V
but low switch resistance and low leakage characteris- The main limitation of supply voltages other than ±15V tics are unaffected. Device operation is unchanged, is analog signal range reduction. The MAX317/ and the difference between V+ to V- should not exceed MAX318/MAX319 switches operate with bipolar sup- +44V. plies of ±5V to ±20V. Typical Operating Characteristics graphs show typical on resistance for ±15V, ±10V, and V+ ±5V supplies. Switching times increase by a factor of two or more for operation at ±5V. The MAX317/MAX318/MAX319 can operate from unipolar supplies of +10V to +30V. Both parts can also operate V+ from unbalanced supplies such as +24V and -5V. Connect V- to 0V when operating with a single supply. NO_ This means that VL must be connected to +5V to be COM_ TTL compatible, or to V+ for CMOS logic input levels.
Overvoltage Protection
Vg V- Proper power-supply sequencing is recommended for all CMOS devices. It is important not to exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the V- devices. Always sequence V+ on first, followed by VL, V-, and logic inputs. If power-supply sequencing is not Figure 1. Overvoltage Protection Using Blocking Diodes possible, protect the devices from overvoltage by
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