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Harris Corporation ICL8020AMJD
- Part Number:
ICL8020AMJD
- Manufacturer:
- Category:
- RoHs:
Non-RoHS Compliant - Datasheet:
- Description:
4-BIT EXPANDABLE CURRENT-SWITCH
- In stock 268
Attachment Model Information: ICL8020AMJD
Part Number Overview
- Full Part Number: ICL8020AMJD
- Device Family: ICL8018A / 8019A / 8020A
- Function: 4-Bit Expandable Current-Switch for High-Speed Precision DACs
- Accuracy Grade: 1.0 % (ICL8020A)
- Package Type: Ceramic DIP (CERDIP)
- Temperature Range: Military (–55 °C to +125 °C)
Key Features
- TTL-compatible logic inputs
- 12-bit accuracy when cascaded
- Fast switching: 40 ns typical turn-on time
- Wide supply range: ±4.5 V to ±20 V
- Low tempco: ±50 ppm/°C max (ICL8020A)
- Monolithic construction with internal reference transistor
- Expandable to 8-, 12-, 16-bit D/A converters
Electrical Characteristics (TA = +25 °C, V+ = +15 V, V– = –15 V, VBASELINE = –5 V)
| Parameter | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|
| Absolute Error | – | ±1 | – | % | VIN-HI = 5 V, VIN-LO = 0 V |
| Error Tempco | – | ±50 | – | ppm/°C | – |
| Settling Time to ±½ LSB | – | 200 | – | ns | 12-bit, RL = 1 kΩ |
| Switching Time (LSB turn-on) | – | 40 | – | ns | – |
| Nominal Output Current | – | 1.0 | – | mA | Bit 1 (MSB) |
| – | – | 0.5 | – | mA | Bit 2 |
| – | – | 0.25 | – | mA | Bit 3 |
| – | – | 0.125 | – | mA | Bit 4 (LSB) |
| Zero Output Current | – | 10 | 50 | nA | VIN = 5 V, VOUT = VBASELINE + 1 V |
| Output Voltage Range | VBASELINE | – | +10 | V | – |
| Logic Input Voltage | – | – | – | – | – |
| – VIL (switch ON) | – | – | 0.8 | V | IOUT < 400 nA |
| – VIH (switch OFF) | 2.0 | – | – | V | – |
| Logic Input Current | – | – | – | – | – |
| – IIL (VIN = 0 V) | – | – | 1.0 | mA | – |
| – IIH (VIN = 5 V) | – | 0.01 | – | µA | – |
| Power-Supply Rejection | – | 0.005 | 0.0005 | %/V | – |
| Supply Current (V± = ±20 V) | – | 10 | – | mA | – |
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Supply Voltage | ±20 V |
| Logic Input Voltage | V– to +5 V |
| Output Voltage | VBASELINE to +20 V |
| VBASELINE Pin | V– to +5 V |
| Lead Temperature (soldering, 10 s) | 300 °C |
| Storage Temperature | –65 °C to +150 °C |
| Operating Temperature (Military) | –55 °C to +125 °C |
Pin Configuration (CERDIP-14)
| Pin | Name | Description |
|---|---|---|
| 1 | BIT 1 (MSB) | Logic input, weight = 1 mA |
| 2 | BIT 2 | Logic input, weight = 0.5 mA |
| 3 | BIT 3 | Logic input, weight = 0.25 mA |
| 4 | BIT 4 (LSB) | Logic input, weight = 0.125 mA |
| 5 | V– | Negative supply (–4.5 V to –20 V) |
| 6 | VBASELINE | Reference baseline (≈ –5 V) |
| 7 | NC | No internal connection |
| 8 | OUT | Summed current output (open collector) |
| 9 | REF OUT | Reference transistor collector |
| 10 | REF IN | Reference transistor base |
| 11 | V+ | Positive supply (+4.5 V to +20 V) |
| 12–14 | NC | No internal connection |
Typical Applications
- High-speed 12-bit D/A converters
- Programmable voltage/current sources
- Digital threshold control
- XY plotter & meter drives
- Industrial process-control DACs
Expansion Capability
- Single quad = 4-bit section
- Cascade 3 quads → 12-bit monotonic converter
- Resistor-divider network attenuates lower-order quads by 16, 256…
- Only MSB quad needs highest-grade device (ICL8018A 0.01 %); less significant sections may use ICL8019A (0.1 %) or ICL8020A (1 %)
Reference Scheme Options
- Simple zener (Fig. 6) – economical, 10 V zener gives rated accuracy
- PNP buffered divider (Fig. 7) – uses –15 V rail, pot for full-scale trim
- Op-amp compensated (Fig. 4) – lowest drift (<2 ppm/°C), 16-bit capable
Packaging & Ordering
- Package: 14-lead CERDIP (0.3″ row spacing)
- Shipping: Standard tube or MIL-PRF-38535 compliant lot
- Matched Sets:– ICL8018AMXJD (1×8018A + 1×8019A + 1×8020A)– ICL8019AMXJD (1×8019A + 1×8020A)– ICL8020AMXJD (2×8020A)
- Marking: Device type, date-code, MIL slash number (when applicable), unique set-number for matched units
Soldering & Assembly Notes
- CERDIP package withstands 300 °C for 10 s
- Use low-offset, low-bias op-amp (e.g., ICL8008) for reference servo
- Decouple VBASELINE (Pin 9) to analog ground with 0.001–0.1 µF to minimize transients
- Keep output trace length short to preserve 40 ns switching edge
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