Rainbow Electronics ADC1175-50 - Manual

ADC1175-50
8-Bit, 50 MSPS, 125 mW A/D Converter
General Description
The ADC1175-50 is a low power, 50 MSPS analog-to-digital
converter that digitizes signals to 8 bits while consuming just
125 mW (typ). The ADC1175-50 uses a unique architecture
that achieves 6.8 Effective Bits at 25 MHz input and 50 MHz
clock frequency. Output formatting is straight binary coding.
The excellent DC and AC characteristics of this device,
together with its low power consumption and +5V single
supply operation, make it ideally suited for many video and
imaging applications, including use in portable equipment.
Furthermore, the ADC1175-50 is resistant to latch-up and
the outputs are short-circuit proof. The top and bottom of the
ADC1175-50’s reference ladder is available for connections,
enabling a wide range of input possibilities. The low input
capacitance (7 pF, typical) makes this device easier to drive
than conventional flash converters and the power down
mode reduces power consumption to less than 5 mW.
The ADC1175-50 is offered in SOIC (EIAJ), TSSOP and LLP
(a molded lead frame-based chip-scale package.) It is de-
signed to operate over the commercial temperature range of
−20˚C to +75˚C.
Features
n Internal Track-and-Hold function
n Single +5V operation
n Internal reference bias resistors
n Industry standard pinout
n Power-down mode ( < 5 mW)
Key Specifications
n Resolution 8 Bits
n Maximum Sampling Frequency 50 MSPS (min)
n THD 54 dB (typ)
n DNL 0.7 LSB (typ)
n ENOB @ f
IN
= 25 MHz 6.8 Bits (typ)
n Guaranteed No Missing Codes
n Differential Phase 0.5˚ (typ)
n Differential Gain 1.0% (typ)
n Power Consumption 125 mW (typ), 190 mW (max)
(Excluding Reference Current)
Applications
n Digital Still Cameras
n CCD Imaging
n Electro-Optics
n Medical Imaging
n Communications
n Video Digitization
n Digital Television
n Multimedia
Connection Diagram
24-pin SOLC and TSSOP
DS100896-1
Top View
24-pin LLP (CSP)
DS100896-34
Bottom View
December 2000
ADC1
175-50
8-Bit,
50
MSPS,
125
mW
A/D
Converter
© 2001 National Semiconductor Corporation DS100896 www.national.com