DH7107GP High-Performance 3½ Digit A/D Converter ±5V 1.8mA DIP-40
The DH7107GP is a high-performance, low-power digit Analog-to-Digital (A/D) converter manufactured by WXDH Electronics. Designed to simplify your display system layouts, it includes seven-segment decoders, display drivers, an internal reference, and a clock on a single chip. This IC is specifically tailored to directly drive an instrument-size light emitting diode (LED) display without requiring additional active external circuits.
Engineered for exceptional accuracy and economy, it utilizes a three-phase measurement cycle consisting of auto-zero, signal integrate, and de-integrate phases. It boasts excellent differential input capabilities and high common-mode rejection, making it highly advantageous for bridge-type transducer systems where input signals float relative to the power supply.
Features:
- Direct LED Display Drive
- Guaranteed Zero Reading
- True Polarity at Zero
- Ultra-Low Input Bias Current
- Low Noise Performance
- Integrated Clock & Reference
- Highly Economical Power
- Enhanced System Stability
Specifications:
Absolute Maximum Ratings
| Parameter | Ratings | Unit |
|---|---|---|
| V+ to GND | 6 | V |
| V- to GND | -6 | V |
| Analog Input Voltage (Either Input) | V- to V+ | – |
| Reference Input Voltage (Either Input) | V- to V+ | – |
| Clock Input | GND to V+ | – |
| Power Dissipation | 800 | mW |
| Working Temperature | -25 ~ 70 | °C |
| Storage Temperature | -25 ~ 100 | °C |
| Maximum Lead Temperature (Soldering 60s) | 300 | °C |
Electrical Characteristics
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Zero Input Reading | VIN = 0.0V, Full Scale = 200mV | -000.0 | ±000.0 | +000.0 | Digital Reading |
| Ratiometric Reading | VIN = VREF, VREF = 100mV | 999 | 999/1000 | 1000 | Digital Reading |
| Rollover Error | -VIN = +VIN = 200mV | -1 | ±0.2 | +1 | counts |
| Linearity | Full Scale = 200mV or 2.000V | -1 | ±0.2 | +1 | counts |
| Common Mode Rejection Ratio | VCM = ±1V, VIN = 0V, Full Scale = 200.0mV | – | 50 | – | μV/V |
| Noise | VIN = 0V, Full Scale = 200.0mV | – | 15 | – | μV |
| Leakage Current Input | VIN = 0V | – | 1 | 10 | pA |
| Zero Reading Drift | VIN = 0V | – | 0.2 | 1 | µV/°C |
| Scale Factor Temperature Coefficient | VIN = 199.0mV | – | 1 | 5 | ppm/°C |
| Supply Current (V+ Power Supply) | VIN = 0V | – | 0.8 | 1.8 | mA |
| Common Pin Analog Common Voltage | 25kΩ Between Common and Positive Supply | 2.7 | 3.05 | 3.35 | V |
| Temperature Coefficient of Analog Common (With Respect to + Supply) | 25kΩ Between Common and Positive Supply | – | 20 | 50 | ppm/°C |
| Temperature Coefficient of Analog Common (With Respect to Supply) | 25kΩ Between Common and Positive Supply | – | – | 75 | ppm/°C |
| Segment Sinking Current | +V = 5.0V, Segment Voltage = 3V | 5 | 8.0 | – | mA |
| Segment Sinking Current, Pin 19 | +V = 5.0V, Segment Voltage = 3V | 10 | 16 | – | mA |
| Segment Sinking Current, Pin 20 | +V = 5.0V, Segment Voltage = 3V | 4 | 7 | – | mA |
Applications:
- Load cell measurement systems
- Digital weighing instruments
- Digital temperature measurement and tracking systems
- Floating, battery-powered instrument panel meters
Package Content
- 1x DH7107GP High-Performance 3½ Digit A/D Converter ±5V 1.8mA DIP-40