ADC-321

Packaging :
Mounting Style : SMD/SMT
Input Type : Voltage
SNR : Yes
Maximum Operating Temperature : + 85 C
Number of Converters : 1
Number of ADC Inputs : 1
Voltage Reference : External
Supply Voltage - Max : 5.25 V
Resolution : 8 bit
Interface Type : Parallel
Supply Voltage - Min : 4.75 V
Package / Case : QFP-32
Maximum Power Dissipation : 180 mW
Architecture : 2-Step Flash
Conversion Rate : 100 MHz


Features:

• Low power dissipation (180mW max.)
• Input signal bandwith (100MHz)
• Optional synchronized clamp function
• Low input capacitance (15pF typ.)
• +5V or +5V/+3.3V power supply operation
• Differential nonlinearity (±½LSB max.)
• Optional self-biased reference
• CMOS/TTL compatible inputs
• Outputs 3-state TTL compatible
• Surface mount package


Specifications

Power Supply Voltage (+AV^_S, +DV_S)                                  0.5 to 7                    Volts
Analog Input Voltage,  (V_IN)                               0.5 to +AV_S + 0.5                     Volts
Reference Input Voltage (V_RT, V_RB)                    0.5 to +AV_S + 0.5                     Volts
Digital Input Voltage (V_IH, V_IL)                           0.5 to +AV_S + 0.5                     Volts
Digital Output Voltage (V_OH, V_OL)                      0.5 to +DV_S + 0.5                     Volts


Description

The ADC-321 is an 8-bit, high speed, monolithic CMOS, sub-ranging A/D converter. The ADC-321 achieves a sampling rate comparable to flash converters by employing a sub-ranging technique which uses multiple comparator blocks each containing a sample-and-hold amplifier. The ADC-321 can operate with either a single +5V or dual +5V and +3.3V power source to allow easy interfacing with 3.3V logic.

An optional synchronous clamp function useful for video signal processing is provided. The ADC-321 is well suited for the portable video signal processors due to its low 125mW typical power dissipation. The ADC-321 also features ±0.5 LSB max. differential non-linearity, a self bias function that can eliminate the need for external references, SNR with THD of 45dB, a small 32-pin QFP package and an operating temperature range of 40 to +85°C