SP Amp Variable Gain Amp Single R-R I/O 5.5V 20-Pin TSSOP T/R

The PGA112 and PGA113 (binary/scope gains) offer two analog inputs, a three-pin SPI interface, and software shutdown in an MSOP-10 package. The PGA116 and PGA117 (binary/scope gains) offer 10 analog inputs, a four-pin SPI interface with daisy-chain capability, and hardware and software shutdown in a TSSOP-20 package.All versions provide internal calibration channels for system-level calibration. The channels are tied to GND, 0.9VCAL, 0.1VCAL, and VREF, respectively. VCAL, an external voltage connected to Channel 0, is used as the system calibration reference. Binary gains are: 1, 2, 4, 8, 16, 32, 64, and 128; scope gains are: 1, 2, 5, 10, 20, 50, 100, and 200. 

Rail-to-Rail Input/Output

Offset: 25µV (typ), 100µV (max)

Zerø-Drift: 0.35µV/°C (typ), 1.2µV/°C (max)

Low Noise: 12nV/vHz

Input Offset Current: ±5nA max (+25°C)

Gain Error: 0.1% max (G = 32),
0.3% max (G > 32)

Binary Gains: 1, 2, 4, 8, 16, 32, 64, 128(PGA112, PGA116)

Scope Gains: 1, 2, 5, 10, 20, 50, 100, 200 (PGA113, PGA117)

Gain Switching Time: 200ns

Two Channel MUX:PGA112, PGA113
10 Channel MUX: PGA116, PGA117

Four Internal Calibration Channels

Amplifier Optimized for Driving CDAC ADCs

Output Swing: 50mV to Supply Rails

AV_DD and DV_DD for Mixed Voltage Systems

I_Q = 1.1mA (typ)

Software/Hardware Shutdown: I_Q = 4µA (typ)

Temperature Range: -40°C to +125°C

SPI Interface (10MHz) with Daisy-Chain Capability

APPLICATIONS

• Remote e-Meter Reading
• Automatic Gain Control
• Portable Data Acquisition
• PC-Based Signal Acquisition Systems
• Test and Measurement
• Programmable Logic Controllers
• Battery-Powered Instruments
• Handheld Test Equipment