ADC Family consumes power at rates down to 230 mW.
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Press Release Summary:
Available in 32-pin, 5 x 5 mm QFN package, LTC2220 ADC family include models that range from 10-170 Msps at 12- and 10-bit resolution, as well as 14-bit converters to 80 Msps. Optimized for undersampling, 3 V converters operate at high Intermediate Frequencies (IF); LTC2249 features 575 MHz bandwidth and achieves 85 dB SFDR up to 140 MHz input. Pin-compatible versions, at sample rates of 65, 40, 25, and 10 Msps, feature power as low as 60 mW.
Original Press Release:
14-Bit, 80Msps ADC in Expanding Family Achieves Outstanding AC Performance at Only 230mW Power Consumption
Latest Announcement of New Devices in High Speed, Low Power ADC Family
Milpitas, CA - October 11, 2004 - A second-generation 14-bit 80Msps ADC in Linear Technology's recently announced LTC2220 family achieves extremely low power consumption with excellent AC performance. At just 230mW, in a 5mm x 5mm QFN package, the LTC2249 is only half the power of its nearest competitor at this speed, has the smallest package and board size, yet achieves over 73dB SNR up to 100MHz input - better than even higher-powered competitors. The LTC2249 is one of 13 new ADCs introduced today by Linear Technology, as part of its expanding family of low power, high speed ADCs, which range from 10Msps to 170Msps at 12-bit and 10-bit resolution, as well as 14-bit converters up to 80Msps. These low power ADCs excel at undersampling, making them well suited for communications applications such as WCDMA cellular base station transceivers, digital predistortion power amplifier linearization, and cable modem termination systems.
This new ADC family complements Linear Technology's previously announced LTC1750 family of 5V ADCs, which achieves unmatched AC performance. The LTC2220 family of 3V converters features significantly lower power than competing devices without sacrificing AC performance.
The LTC2249 is ideal for low power base stations, since it supports compact transceiver boards with smaller power supplies that require minimal cooling. The system footprint of the device is small since few external bypasses are needed. Optimized for undersampling, it suits base station designs that operate at high Intermediate Frequencies (IF); the LTC2249 features a 575MHz bandwidth and achieves 85dB SFDR up to 140MHz input. Pin-compatible versions at sample rates of 65Msps, 40Msps, 25Msps and 10Msps feature even lower power - as low as 60mW. Pin-compatible 12-bit and 10-bit versions at each speed are also in full production.
In addition to the 13 new ADCs introduced today, Linear Technology is already shipping 6 previously introduced ADCs in this family. All of these devices are part of the 24-member LTC2220 ADC family, the remaining members of which will be introduced by the fourth calendar quarter. Linear Technology's new ADC family features industry-leading AC performance at every sample rate, the lowest power of any such ADCs in the industry, and pin-compatibility, allowing easy migration from 10-bit to 12- or 14-bits, or to different sample rates. In addition to the LTC2249, the other high-performance, low-power ADCs introduced today include the LTC2245/6/7/8, LTC2225/6/7/8/9 and LTC2236/7/8/9. All 13 ADCs just announced are now in production and are packaged in 5 x 5mm QFN packages.
The following table provides an overview of the entire LTC2220 family.
Part Number Resolution Speed Power Availability Price (1k)
LTC2224 12-bit 135Msps 630mW Now $33.92
LTC2222 12-bit 105Msps 475mW Now $29.92
LTC2223 12-bit 80Msps 366mW Now $16.70
LTC2234 10-bit 135Msps 630mW Now $20.00
LTC2232 10-bit 105Msps 475mW Now $8.35
LTC2233 10-bit 80Msps 366mW Now $6.70
LTC2249 14-bit 80Msps 230mW Now $25.00
LTC2248 14-bit 65Msps 205mW Now $23.35
LTC2247 14-bit 40Msps 120mW Now $15.85
LTC2246 14-bit 25Msps 75mW Now $12.50
LTC2245 14-bit 10Msps 60mW Now $10.00
LTC2220 12-bit 170Msps --- Q4 CY 04 ---
LTC2221 12-bit 135Msps --- Q4 CY 04 ---
LTC2229 12-bit 80Msps 230mW Now $16.70
LTC2228 12-bit 65Msps 205mW Now $12.08
LTC2227 12-bit 40Msps 120mW Now $7.92
LTC2226 12-bit 25Msps 75mW Now $7.50
LTC2225 12-bit 10Msps 60mW Now $4.57
LTC2230 10-bit 170Msps --- Q4 CY 04 ---
LTC2231 10-bit 135Msps --- Q4 CY 04 ---
LTC2239 10-bit 80Msps 230mW Now $6.70
LTC2238 10-bit 65Msps 205mW Now $5.00
LTC2237 10-bit 40Msps 120mW Now $4.80
LTC2236 10-bit 25Msps 75mW Now $3.50
Summary of Features: LTC2249 Family
Sample Rate: 80Msps/65Msps/40Msps/25Msps/10Msps
73dB SNR up to 100MHz Input
85dB SFDR up to 140MHz Input
575MHz Full Power Bandwidth S/H
Tiny Board Footprint
Single 3V Supply (2.7V to 3.4V)
Low Power Dissipation: 230mW/210mW/125mW/75mW/60mW
Selectable Input Ranges: ±0.5V or ±1V
No Missing Codes
Optional Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
32-pin, 5mm x 5mm QFN Package
Pin Compatible Family
80Msps: LTC2249 (14-Bit), LTC2229 (12-Bit), LTC2239 (10-Bit)
65Msps: LTC2248 (14-Bit), LTC2228 (12-Bit), LTC2238 (10-Bit)
40Msps: LTC2247 (14-Bit), LTC2227 (12-Bit), LTC2237 (10-Bit)
25Msps: LTC2246 (14-Bit), LTC2226 (12-Bit), LTC2236 (10-Bit)
10Msps: LTC2245 (14-Bit), LTC2225 (12-Bit)
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
Note: LT and LTC are registered trademarks of Linear Technology Corp.
