Low Power, 3 Digit A/D Converter The ICL7136CMH is a 3½-digit analog-to-digital converter (ADC) manufactured by Maxim Integrated (formerly Intersil). Below are its key specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Resolution:** 3½ digits (up to 1999 counts)
- **Supply Voltage:** Typically ±5V (dual supply) or +9V (single supply)
- **Low Power Consumption:** Typically 1mW (ideal for battery-powered applications)
- **Input Voltage Range:** ±200mV full scale (adjustable)
- **Auto-Zero Function:** True differential input with automatic zero correction
- **Reference Voltage:** Internal or external (typically 1V)
- **Conversion Rate:** ~3 readings per second
- **Operating Temperature Range:** 0°C to +70°C (commercial grade)
- **Package:** 40-pin ceramic DIP (Dual In-line Package)
### **Descriptions:**
- The ICL7136CMH is a low-power, high-precision ADC designed for digital panel meters and portable instrumentation.
- It includes an internal display driver for 7-segment LCDs, eliminating the need for external decoding logic.
- Features true differential inputs and high input impedance (>10⁹ Ω).
- Designed for low-power operation, making it suitable for battery-powered devices.
### **Features:**
- **Low Power:** Optimized for battery operation with minimal current draw.
- **Auto-Polarity:** Automatically detects and displays positive or negative input voltages.
- **Auto-Zeroing:** Ensures accuracy by eliminating offset errors.
- **On-Chip Reference:** Includes a stable internal reference (1V typical).
- **LCD Driver:** Directly drives 3½-digit LCD displays without external components.
- **Overload Indication:** Displays "OL" when input exceeds full scale.
This information is based solely on the manufacturer's datasheet and technical documentation.
