GENERAL DESCRIPTION
The XRD87L99 is a flexible, easy to use, precision 10-bit analog-to-digital converter with 8-channel mux that operates over a wide range of input and sampling conditions. The XRD87L99 can operate with pulsed "on demand" conversion operation or continuous "pipeline" operation for sampling rates up to 2MHz. The elimination of the S/H requirements, very low power, and small package size offer the designer a low cost solution. No sample and hold is required for CCD applications up to 2MHz, or multiplexed input applications when the signal source bandwidth is limited to 100kHz. The input architecture of the XRD87L99 allows direct interface to any analog input range between AGND and AVDD. The user simply sets VREF(+) and VREF(-) to encompass the desired input range.
Scaled reference resistor taps @ 1/4 R, 1/2 R and 3/4 R allow for customizing the transfer curve as well as providing a 1/2 span reference voltage. Digital outputs are CMOS and TTL compatible.
The XRD87L99 uses a two-step flash technique. The first segment converts the 5 MSBs and consists of autobalanced comparators, latches, an encoder, and buffer storage registers. The second segment converts the remaining 5 LSBs.
When the power down input is "high", the data outputs DB9 to DB0 hold the current values and VREF(-) is disconnected from VREF1(-). The power consumption during the power down mode is 0.1mW.

FEATURES
*10-Bit Resolution
*8-Channel Mux
*Sampling Rate - < 1kHz - 2MHz
*Low Power CMOS - 24 mW (typ)
*Power Down; Lower Consumption - 0.1 mW (typ)
*Input Range between GND and VDD
*No S/H Required for Analog Signals less than 100kHz
*No S/H Required for CCD Signals less than 2MHz
*Single Power Supply (2.7 to 3.6V)
*Latch-Up Free
*ESD Protection: 2000 Volts Minimum

APPLICATIONS
*mP/DSP Interface and Control Application
*High Resolution Imaging - Scanners & Copiers
*Wireless Digital Communications
*Multiplexed Data Acquisition

XRD87L99AIQ
TAG A/D, Converter, MUX

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DESCRIPTION
 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 fains) 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.

FEATURES
* Rail-to-Rail Input/Output
* Offset: 25mV (typ), 100mV (max)
* Zerø Drift: 0.35mV/°C (typ), 1.2mV/°C (max)
* Low Noise: 12nV/√Hz
* 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
* AVDD and DVDD for Mixed Voltage Systems
* IQ = 1.1mA (typ)
* Software/Hardware Shutdown: IQ ≤ 4mA (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

PGA113
PGA116
PGA117

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