Overview
The AD8137YRZ, produced by Analog Devices Inc., is a low-cost, low-power differential ADC driver. It is designed to drive analog-to-digital converters (ADCs) in systems that are sensitive to power and cost. The AD8137 features a rail-to-rail output and an internal common-mode feedback architecture, which allows for the control of the output common-mode voltage through a single pin. This architecture also provides inherently balanced outputs and suppresses even-order harmonic distortion products. The device is easy to apply and supports both fully differential and single-ended-to-differential gain configurations using external feedback networks consisting of four resistors.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | −40 | +125 | °C | |
| Input Voltage Range | −4 | +4 | V | |
| Input Resistance (Differential) | 800 | kΩ | ||
| Input Capacitance (Common-mode) | 1.8 | pF | ||
| Output Voltage Swing (Each single-ended output, RL = 1 kΩ) | VS− + 0.55 | VS+ − 0.55 | V | |
| Output Current | 20 | mA | ||
| −3 dB Small Signal Bandwidth (VO, dm = 0.1 V p-p) | 61 | 75 | 76 | MHz |
| Slew Rate (VO, cm = 0.5 V p-p) | 63 | V/µs | ||
| Power Consumption (Power-down = high/low) | 150/210 | 170/240 | µA |
Key Features
- Low cost and low power consumption, making it ideal for power-sensitive and cost-conscious systems.
- Rail-to-rail output and internal common-mode feedback architecture for controlled output common-mode voltage.
- Inherently balanced outputs and suppression of even-order harmonic distortion products.
- Supports fully differential and single-ended-to-differential gain configurations using external feedback networks.
- Power-down feature for critical low power applications.
- Available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages.
- Operates over an extended industrial temperature range of −40°C to +125°C.
Applications
The AD8137YRZ is suitable for various applications where low power and cost are critical, including:
- Driving analog-to-digital converters (ADCs) in low-power systems.
- Signal conditioning in industrial and medical devices.
- Audio and video signal processing where balanced outputs are required.
- Telecommunication systems that demand low distortion and balanced signals.
Q & A
- What is the primary function of the AD8137YRZ?
The AD8137YRZ is a low-cost, low-power differential ADC driver designed to drive analog-to-digital converters (ADCs) in systems sensitive to power and cost.
- What is the operating temperature range of the AD8137YRZ?
The AD8137YRZ operates over an extended industrial temperature range of −40°C to +125°C.
- What package options are available for the AD8137YRZ?
The AD8137YRZ is available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages.
- How does the AD8137YRZ control its output common-mode voltage?
The AD8137YRZ controls its output common-mode voltage through its internal common-mode feedback architecture, using a single pin.
- What is the typical power consumption of the AD8137YRZ in power-down mode?
The typical power consumption in power-down mode is 150/210 µA (high/low).
- What is the maximum output current of the AD8137YRZ?
The maximum output current is 20 mA.
- What is the −3 dB small signal bandwidth of the AD8137YRZ?
The −3 dB small signal bandwidth is typically 75 MHz (min 61 MHz, max 76 MHz).
- How does the AD8137YRZ suppress harmonic distortion?
The AD8137YRZ suppresses even-order harmonic distortion products through its internal feedback loop.
- Can the AD8137YRZ be used in single-ended-to-differential gain configurations?
Yes, the AD8137YRZ supports single-ended-to-differential gain configurations using external feedback networks.
- What is the slew rate of the AD8137YRZ?
The slew rate is typically 63 V/µs.
